TSG-22621, http push all headers togetherdev-http-base-v1.0-cache-all-headers

15 files changed, 781 insertions, 2237 deletions

diff --git a/decoders/http/CMakeLists.txt b/decoders/http/CMakeLists.txt
index c242afe..cc78ffc 100644
--- a/decoders/http/CMakeLists.txt
+++ b/decoders/http/CMakeLists.txt
@@ -1,8 +1,7 @@
 include_directories(${CMAKE_SOURCE_DIR}/deps)
 
-set(HTTP_SRC http_decoder.c http_decoder_utils.c http_decoder_half.c
-             http_decoder_table.c http_decoder_string.c http_content_decompress.c
-             http_decoder_result_queue.c http_decoder_stat.c http_decoder_tunnel.c)
+set(HTTP_SRC http_decoder.c http_decoder_utils.c http_decoder_half.c http_content_decompress.c
+             http_decoder_result_queue.c http_decoder_stat.c )
 
 add_library(http STATIC ${HTTP_SRC})
 add_library(http_dyn SHARED ${HTTP_SRC})
diff --git a/decoders/http/http_decoder.c b/decoders/http/http_decoder.c
index 5e2db72..a57bbdb 100644
--- a/decoders/http/http_decoder.c
+++ b/decoders/http/http_decoder.c
@@ -5,8 +5,6 @@
 #include <unistd.h>
 #include "http_decoder_private.h"
 
-#pragma GCC diagnostic ignored "-Wunused-parameter"
-
 struct http_message *http_message_new(enum http_message_type type, struct http_decoder_result_queue *queue,
                                       int queue_index, uint8_t flow_type)
 {
@@ -39,7 +37,7 @@ struct http_message *http_body_message_new(enum http_message_type type, struct h
     return msg;
 }
 
-static void http_message_decompress_buffer_free(struct http_message *msg)
+static void http_half_data_decompress_free(struct http_message *msg)
 {
     struct http_decoder_half_data *ref_data = NULL;
     if (HTTP_MESSAGE_REQ_BODY_START == msg->type || HTTP_MESSAGE_REQ_BODY == msg->type || HTTP_MESSAGE_REQ_BODY_END == msg->type)
@@ -50,17 +48,44 @@ static void http_message_decompress_buffer_free(struct http_message *msg)
     {
         ref_data = msg->ref_queue->array[msg->queue_index].res_data;
     }
+    else
+    {
+        return;
+    }
     if (ref_data != NULL && msg->decompress_payload.iov_base != NULL)
     {
         http_half_decompress_buffer_free(ref_data, &msg->decompress_payload);
     }
 }
 
-static void http_message_free(void *http_msg, void *cb_arg)
+static void http_half_data_headers_free(struct http_message *msg)
+{
+    struct http_decoder_half_data *ref_data = NULL;
+    if (HTTP_MESSAGE_REQ_LINE_HEADERS == msg->type)
+    {
+        ref_data = msg->ref_queue->array[msg->queue_index].req_data;
+    }
+    else if (HTTP_MESSAGE_RES_LINE_HEADERS == msg->type)
+    {
+        ref_data = msg->ref_queue->array[msg->queue_index].res_data;
+    }
+    else
+    {
+        return;
+    }
+
+    if (ref_data)
+    {
+        http_half_headers_ref_free(ref_data);
+    }
+}
+
+static void http_message_free(void *http_msg, UNUSED void *cb_arg)
 {
     if (http_msg)
     {
-        http_message_decompress_buffer_free((struct http_message *)http_msg);
+        http_half_data_decompress_free((struct http_message *)http_msg);
+        http_half_data_headers_free((struct http_message *)http_msg);
         FREE(http_msg);
     }
 }
@@ -110,11 +135,10 @@ static void http_event_handler(enum http_event event, struct http_decoder_half_d
             half_data = NULL;
         }
 
-        half_data = http_decoder_half_data_new(mempool);
+        half_data = http_decoder_half_data_new(mempool, FLOW_TYPE_C2S);
         ret = http_decoder_result_queue_push_req(queue, half_data);
         if (ret < 0)
         {
-            fprintf(stderr, "http_decoder_result_queue_push req failed.");
             http_decoder_half_data_free(mempool, half_data);
             half_data = NULL;
         }
@@ -125,38 +149,16 @@ static void http_event_handler(enum http_event event, struct http_decoder_half_d
         session_mq_publish_message(ev_ctx->ref_session, exdata->pub_topic_id, msg);
         http_decoder_stat_update(&httpd_env->hd_stat, thread_id, HTTP_TRANSACTION_NEW, 1);
         break;
-    case HTTP_EVENT_REQ_LINE:
-        msg = http_message_new(HTTP_MESSAGE_REQ_LINE, queue, queue_idx, HTTP_REQUEST);
-        session_mq_publish_message(ev_ctx->ref_session, exdata->pub_topic_id, msg);
-        if (httpd_tunnel_identify(httpd_env, FLOW_TYPE_C2S, half_data))
-        {
-            exdata->tunnel_state = HTTP_TUN_C2S_HDR_START;
-            // http_decoder_stat_update(&httpd_env->hd_stat, thread_id, HTTPD_STAT_TUNNEL, 1);
-        }
-        if (httpd_is_tunnel_session(httpd_env, exdata))
-        {
-            http_decoder_get_url(half_data, mempool);
-        }
-        break;
-    case HTTP_EVENT_REQ_HDR:
-        msg = http_message_new(HTTP_MESSAGE_REQ_HEADER, queue, queue_idx, HTTP_REQUEST);
-        session_mq_publish_message(ev_ctx->ref_session, exdata->pub_topic_id, msg);
-        break;
+
     case HTTP_EVENT_REQ_HDR_END:
     {
-        http_decoder_join_url_finally(ev_ctx, half_data, mempool);
+        http_parse_headers_finally(ev_ctx, half_data);
         /*  maybe some parsed headers in buffer, but has not pushed to plugins yet */
-
-        if (http_decoder_half_data_has_parsed_header(half_data))
         {
-            msg = http_message_new(HTTP_MESSAGE_REQ_HEADER, queue, queue_idx, HTTP_REQUEST);
+            msg = http_message_new(HTTP_MESSAGE_REQ_LINE_HEADERS, queue, queue_idx, HTTP_REQUEST);
             session_mq_publish_message(ev_ctx->ref_session, exdata->pub_topic_id, msg);
         }
-        http_half_data_update_commit_index(half_data);
-        msg = http_message_new(HTTP_MESSAGE_REQ_HEADER_END, queue, queue_idx, HTTP_REQUEST);
-        session_mq_publish_message(ev_ctx->ref_session, exdata->pub_topic_id, msg);
-
-        int tot_c2s_headers = http_half_data_get_total_parsed_header_count(half_data);
+        int tot_c2s_headers = http_half_get_header_count(half_data);
         http_decoder_stat_update(&httpd_env->hd_stat, thread_id, HTTP_C2S_HEADERS, tot_c2s_headers);
 
         const char *tmp_url = NULL;
@@ -171,15 +173,14 @@ static void http_event_handler(enum http_event event, struct http_decoder_half_d
         break;
     case HTTP_EVENT_REQ_BODY_DATA:
     {
-        hstring raw_body = {};
+        hstring *raw_body = http_half_get_raw_body(half_data);
         hstring decompress_body = {};
-        http_decoder_half_data_get_raw_body(half_data, (const char **)&raw_body.iov_base, &raw_body.iov_len);
         http_half_get_lastest_decompress_buffer(half_data, &decompress_body);
-        msg = http_body_message_new(HTTP_MESSAGE_REQ_BODY, queue, queue_idx, HTTP_REQUEST, &raw_body, &decompress_body);
+        msg = http_body_message_new(HTTP_MESSAGE_REQ_BODY, queue, queue_idx, HTTP_REQUEST, raw_body, &decompress_body);
         session_mq_publish_message(ev_ctx->ref_session, exdata->pub_topic_id, msg);
         if (decompress_body.iov_base != NULL)
         {
-            http_decoder_stat_update(&httpd_env->hd_stat, thread_id, HTTP_C2S_ZIP_BYTES, raw_body.iov_len);
+            http_decoder_stat_update(&httpd_env->hd_stat, thread_id, HTTP_C2S_ZIP_BYTES, raw_body->iov_len);
             http_decoder_stat_update(&httpd_env->hd_stat, thread_id, HTTP_C2S_UNZIP_BYTES, decompress_body.iov_len);
         }
     }
@@ -199,18 +200,6 @@ static void http_event_handler(enum http_event event, struct http_decoder_half_d
             http_decoder_stat_update(&httpd_env->hd_stat, thread_id, HTTP_TRANSACTION_FREE, 1);
             http_decoder_stat_update(&httpd_env->hd_stat, thread_id, HTTP_C2S_ASYMMETRY_TRANSACTION, 1);
         }
-        if (httpd_is_tunnel_session(httpd_env, exdata))
-        {
-            if (SESSION_SEEN_C2S_FLOW == flow_flag)
-            {
-                exdata->tunnel_state = HTTP_TUN_INNER_STARTING;
-                exdata->pub_topic_id = httpd_env->topic_exdata_compose[HTTPD_TOPIC_HTTP_TUNNEL_INDEX].sub_topic_id;
-            }
-            else
-            {
-                exdata->tunnel_state = HTTP_TUN_C2S_END;
-            }
-        }
         http_half_update_state(half_data, event);
         http_decoder_result_queue_inc_req_index(queue);
         half_data = http_decoder_result_queue_pop_req(queue);
@@ -237,11 +226,10 @@ static void http_event_handler(enum http_event event, struct http_decoder_half_d
             half_data = NULL;
         }
 
-        half_data = http_decoder_half_data_new(mempool);
+        half_data = http_decoder_half_data_new(mempool, FLOW_TYPE_S2C);
         ret = http_decoder_result_queue_push_res(queue, half_data);
         if (ret < 0)
         {
-            fprintf(stderr, "http_decoder_result_queue_push res failed.");
             http_decoder_half_data_free(mempool, half_data);
             half_data = NULL;
         }
@@ -251,50 +239,24 @@ static void http_event_handler(enum http_event event, struct http_decoder_half_d
         {
             if (SESSION_SEEN_S2C_FLOW == flow_flag)
             {
+                http_decoder_stat_update(&httpd_env->hd_stat, thread_id, HTTP_TRANSACTION_NEW, 1);
                 msg = http_message_new(HTTP_TRANSACTION_START, queue, queue_idx, HTTP_RESPONSE);
                 session_mq_publish_message(ev_ctx->ref_session, exdata->pub_topic_id, msg);
             }
         }
         break;
-    case HTTP_EVENT_RES_LINE:
-        msg = http_message_new(HTTP_MESSAGE_RES_LINE, queue, queue_idx, HTTP_RESPONSE);
-        session_mq_publish_message(ev_ctx->ref_session, exdata->pub_topic_id, msg);
-        if (httpd_tunnel_identify(httpd_env, FLOW_TYPE_S2C, half_data))
-        {
-            exdata->tunnel_state = HTTP_TUN_S2C_START;
-        }
-        else
-        {
-            // connect response fail, reset tunnel_state
-            exdata->tunnel_state = HTTP_TUN_NON;
-        }
-        break;
-    case HTTP_EVENT_RES_HDR:
-        msg = http_message_new(HTTP_MESSAGE_RES_HEADER, queue, queue_idx, HTTP_RESPONSE);
-        session_mq_publish_message(ev_ctx->ref_session, exdata->pub_topic_id, msg);
-        break;
+
     case HTTP_EVENT_RES_HDR_END:
     {
+        http_parse_headers_finally(ev_ctx, half_data);
         /*  maybe some header in table buffer but has not pushed to plugins */
         half_data = http_decoder_result_queue_peek_res(queue);
-        if (http_decoder_half_data_has_parsed_header(half_data))
         {
-            msg = http_message_new(HTTP_MESSAGE_RES_HEADER, queue, queue_idx, HTTP_RESPONSE);
+            msg = http_message_new(HTTP_MESSAGE_RES_LINE_HEADERS, queue, queue_idx, HTTP_RESPONSE);
             session_mq_publish_message(ev_ctx->ref_session, exdata->pub_topic_id, msg);
         }
-        http_half_data_update_commit_index(half_data);
-        msg = http_message_new(HTTP_MESSAGE_RES_HEADER_END, queue, queue_idx, HTTP_RESPONSE);
-        session_mq_publish_message(ev_ctx->ref_session, exdata->pub_topic_id, msg);
-
-        int tot_s2c_headers = http_half_data_get_total_parsed_header_count(half_data);
+        int tot_s2c_headers = http_half_get_header_count(half_data);
         http_decoder_stat_update(&httpd_env->hd_stat, thread_id, HTTP_S2C_HEADERS, tot_s2c_headers);
-
-        if (httpd_is_tunnel_session(httpd_env, exdata))
-        {
-            exdata->tunnel_state = HTTP_TUN_INNER_STARTING;
-            http_half_pre_context_free(ev_ctx->ref_session, exdata);
-            exdata->pub_topic_id = httpd_env->topic_exdata_compose[HTTPD_TOPIC_HTTP_TUNNEL_INDEX].sub_topic_id;
-        }
     }
     break;
     case HTTP_EVENT_RES_BODY_BEGIN:
@@ -303,15 +265,14 @@ static void http_event_handler(enum http_event event, struct http_decoder_half_d
         break;
     case HTTP_EVENT_RES_BODY_DATA:
     {
-        hstring raw_body = {};
-        http_decoder_half_data_get_raw_body(half_data, (const char **)&raw_body.iov_base, &raw_body.iov_len);
+        hstring *raw_body = http_half_get_raw_body(half_data);
         hstring decompress_body = {};
         http_half_get_lastest_decompress_buffer(half_data, &decompress_body);
-        msg = http_body_message_new(HTTP_MESSAGE_RES_BODY, queue, queue_idx, HTTP_RESPONSE, &raw_body, &decompress_body);
+        msg = http_body_message_new(HTTP_MESSAGE_RES_BODY, queue, queue_idx, HTTP_RESPONSE, raw_body, &decompress_body);
         session_mq_publish_message(ev_ctx->ref_session, exdata->pub_topic_id, msg);
         if (decompress_body.iov_base != NULL)
         {
-            http_decoder_stat_update(&httpd_env->hd_stat, thread_id, HTTP_S2C_ZIP_BYTES, raw_body.iov_len);
+            http_decoder_stat_update(&httpd_env->hd_stat, thread_id, HTTP_S2C_ZIP_BYTES, raw_body->iov_len);
             http_decoder_stat_update(&httpd_env->hd_stat, thread_id, HTTP_S2C_UNZIP_BYTES, decompress_body.iov_len);
         }
     }
@@ -414,23 +375,6 @@ static void http_decoder_exdata_free(struct http_decoder_exdata *ex_data)
     FREE(ex_data);
 }
 
-static int http_protocol_identify(const char *data, size_t data_len)
-{
-    llhttp_t parser;
-    llhttp_settings_t settings;
-    enum llhttp_errno error;
-
-    llhttp_settings_init(&settings);
-    llhttp_init(&parser, HTTP_BOTH, &settings);
-
-    error = llhttp_execute(&parser, data, data_len);
-    if (error != HPE_OK)
-    {
-        return -1;
-    }
-    return 1;
-}
-
 static void _http_decoder_context_free(struct http_decoder_env *env)
 {
     if (NULL == env)
@@ -457,8 +401,7 @@ static int load_http_decoder_config(const char *cfg_path,
     FILE *fp = fopen(cfg_path, "r");
     if (NULL == fp)
     {
-        fprintf(stderr, "[%s:%d]Can't open config file:%s",
-                __FUNCTION__, __LINE__, cfg_path);
+        fprintf(stderr, "[%s]Can't open config file:%s", __FUNCTION__, cfg_path);
         return -1;
     }
 
@@ -471,8 +414,7 @@ static int load_http_decoder_config(const char *cfg_path,
     toml_table_t *basic_sec_tbl = toml_table_in(root, "basic");
     if (NULL == basic_sec_tbl)
     {
-        fprintf(stderr, "[%s:%d]config file:%s has no key: [basic]",
-                __FUNCTION__, __LINE__, cfg_path);
+        fprintf(stderr, "[%s]config file:%s has no key: [basic]", __FUNCTION__, cfg_path);
         toml_free(root);
         return -1;
     }
@@ -523,89 +465,18 @@ static int load_http_decoder_config(const char *cfg_path,
         hd_cfg->stat_output_interval = DEFAULT_STAT_OUTPUT_INTERVAL;
     }
 
-    int_val = toml_int_in(basic_sec_tbl, "proxy_enable");
-    if (int_val.ok != 0)
-    {
-        hd_cfg->proxy_enable = int_val.u.i;
-    }
-    else
-    {
-        hd_cfg->proxy_enable = 0;
-    }
-
     toml_free(root);
     return ret;
 }
 
-static int http_msg_get_request_header(const struct http_message *msg, const char *name, size_t name_len,
-                                       struct http_header_field *hdr_result)
-{
-    const struct http_decoder_half_data *req_data =
-        msg->ref_queue->array[msg->queue_index].req_data;
-    return http_decoder_half_data_get_header(req_data, name, name_len, hdr_result);
-}
-
-static int http_msg_get_response_header(const struct http_message *msg, const char *name, size_t name_len,
-                                        struct http_header_field *hdr_result)
-{
-    const struct http_decoder_half_data *res_data =
-        msg->ref_queue->array[msg->queue_index].res_data;
-    return http_decoder_half_data_get_header(res_data, name, name_len, hdr_result);
-}
-
-static int http_msg_request_header_next(const struct http_message *msg,
-                                        struct http_header_field *hdr)
-{
-    const struct http_decoder_half_data *req_data =
-        msg->ref_queue->array[msg->queue_index].req_data;
-    return http_decoder_half_data_iter_header((struct http_decoder_half_data *)req_data, hdr);
-}
-
-static int http_msg_response_header_next(const struct http_message *msg, struct http_header_field *hdr)
-{
-    const struct http_decoder_half_data *res_data =
-        msg->ref_queue->array[msg->queue_index].res_data;
-    return http_decoder_half_data_iter_header((struct http_decoder_half_data *)res_data, hdr);
-}
-
-#if 0
-static int http_msg_get_request_raw_body(const struct http_message *msg, hstring *body)
-{
-    const struct http_decoder_half_data *req_data =
-        msg->ref_queue->array[msg->queue_index].req_data;
-    return http_decoder_half_data_get_raw_body(req_data, body);
-}
-
-static int http_msg_get_response_raw_body(const struct http_message *msg, hstring *body)
-{
-    const struct http_decoder_half_data *res_data =
-        msg->ref_queue->array[msg->queue_index].res_data;
-    return http_decoder_half_data_get_raw_body(res_data, body);
-}
-
-static int http_msg_get_request_decompress_body(const struct http_message *msg, hstring *body)
-{
-    const struct http_decoder_half_data *req_data =
-        msg->ref_queue->array[msg->queue_index].req_data;
-    return http_decoder_half_data_get_decompress_body(req_data, body);
-}
-
-static int http_msg_get_response_decompress_body(const struct http_message *msg, hstring *body)
-{
-    const struct http_decoder_half_data *res_data =
-        msg->ref_queue->array[msg->queue_index].res_data;
-    return http_decoder_half_data_get_decompress_body(res_data, body);
-}
-#endif
-
-static struct http_decoder_exdata *httpd_session_exdata_new(struct session *sess, struct http_decoder_env *httpd_env,
+static struct http_decoder_exdata *httpd_session_exdata_new(struct http_decoder_env *httpd_env,
                                                             long long req_start_seq, long long res_start_seq)
 {
     struct http_decoder_exdata *exdata = http_decoder_exdata_new(httpd_env->hd_cfg.mempool_size,
                                                                  httpd_env->hd_cfg.result_queue_len,
                                                                  httpd_env->hd_cfg.decompress_switch,
                                                                  httpd_env, req_start_seq, res_start_seq);
-    // exdata->sub_topic_id = sub_topic_id;
+    exdata->httpd_env = httpd_env;
     int thread_id = stellar_get_current_thread_index();
     http_decoder_stat_update(&httpd_env->hd_stat, thread_id, HTTP_SESSION_NEW, 1);
     return exdata;
@@ -615,36 +486,17 @@ static struct http_decoder_exdata *httpd_session_exdata_new(struct session *sess
 extern "C"
 {
 #endif
-
-    void httpd_ex_data_free_cb(int idx, void *ex_data, void *arg)
+    void httpd_ex_data_free_cb(UNUSED int idx, void *ex_data, UNUSED void *arg)
     {
         if (NULL == ex_data)
         {
             return;
         }
         struct http_decoder_exdata *exdata = (struct http_decoder_exdata *)ex_data;
-        http_decoder_exdata_free(exdata);
-    }
-
-    void *httpd_session_ctx_new_cb(struct session *sess, void *plugin_env)
-    {
-        return (void *)HTTP_CTX_IS_HTTP;
-    }
-
-    void httpd_session_ctx_free_cb(struct session *sess, void *session_ctx, void *plugin_env)
-    {
-        if (NULL == plugin_env || NULL == session_ctx)
-        {
-            return;
-        }
-        if (strncmp((const char *)session_ctx, HTTP_CTX_NOT_HTTP, strlen(HTTP_CTX_NOT_HTTP)) == 0)
-        {
-            return;
-        }
-        struct http_decoder_env *httpd_env = (struct http_decoder_env *)plugin_env;
+        struct http_decoder_env *httpd_env = exdata->httpd_env;
         int thread_id = stellar_get_current_thread_index();
         unsigned char flow_flag = 0;
-        session_is_symmetric(sess, &flow_flag);
+        session_is_symmetric(exdata->sess, &flow_flag);
 
         if (SESSION_SEEN_C2S_FLOW == flow_flag)
         {
@@ -655,17 +507,12 @@ extern "C"
             http_decoder_stat_update(&httpd_env->hd_stat, thread_id, HTTP_S2C_ASYMMETRY_SESSION, 1);
         }
         http_decoder_stat_update(&httpd_env->hd_stat, thread_id, HTTP_SESSION_FREE, 1);
+
+        http_decoder_exdata_free(exdata);
     }
 
     static void http_decoder_execute(struct session *sess, struct http_decoder_env *httpd_env, struct http_decoder_exdata *exdata, const char *payload, uint16_t payload_len)
     {
-        if (httpd_in_tunnel_transmitting(httpd_env, exdata))
-        {
-            http_decoder_push_tunnel_data(sess, exdata, httpd_tunnel_state_to_msg(exdata), payload, payload_len);
-            httpd_tunnel_state_update(exdata);
-            return;
-        }
-
         int thread_id = stellar_get_current_thread_index();
         struct http_decoder_half *cur_half = NULL;
         enum flow_type sess_dir = session_get_flow_type(sess);
@@ -683,97 +530,16 @@ extern "C"
         }
 
         http_decoder_half_reinit(cur_half, exdata->queue, exdata->mempool, sess);
-        int ret = http_decoder_half_parse(httpd_env->hd_cfg.proxy_enable, cur_half, payload, payload_len);
+        int ret = http_decoder_half_stage_shaping(cur_half, payload, payload_len);
         if (ret < 0)
         {
             http_decoder_stat_update(&httpd_env->hd_stat, thread_id, HTTP_STAT_PARSE_ERR, 1);
             stellar_session_plugin_dettach_current_session(sess);
-        }
-    }
-
-    void http_decoder_tunnel_msg_cb(struct session *sess, int topic_id, const void *tmsg, void *per_session_ctx, void *plugin_env)
-    {
-        struct http_decoder_env *httpd_env = (struct http_decoder_env *)plugin_env;
-        if (0 == httpd_env->hd_cfg.proxy_enable)
-        {
-            return;
-        }
-        hstring tunnel_payload;
-        http_tunnel_message_get_payload((const struct http_tunnel_message *)tmsg, &tunnel_payload);
-        uint16_t payload_len = tunnel_payload.iov_len;
-        const char *payload = (char *)tunnel_payload.iov_base;
-        if (NULL == payload || 0 == payload_len)
-        {
-            return;
-        }
-
-        struct http_decoder_exdata *exdata = (struct http_decoder_exdata *)session_exdata_get(sess, httpd_env->topic_exdata_compose[HTTPD_TOPIC_HTTP_TUNNEL_INDEX].exdata_id);
-        enum http_tunnel_message_type tmsg_type = http_tunnel_message_type_get((const struct http_tunnel_message *)tmsg);
-
-        switch (tmsg_type)
-        {
-        case HTTP_TUNNEL_OPENING:
-        {
-            if (NULL != exdata)
-            {
-                // not support nested http tunnel
-                session_mq_ignore_message(sess, topic_id, httpd_env->plugin_id);
-                return;
-            }
-            size_t http_identify_len = payload_len > HTTP_IDENTIFY_LEN ? HTTP_IDENTIFY_LEN : payload_len;
-            int is_http = http_protocol_identify(payload, http_identify_len);
-            if (is_http)
-            {
-                long long max_req_seq = 0, max_res_seq = 0;
-                struct http_decoder_exdata *tcp_stream_exdata = (struct http_decoder_exdata *)session_exdata_get(sess, httpd_env->topic_exdata_compose[HTTPD_TOPIC_TCP_STREAM_INDEX].exdata_id);
-                http_half_get_max_transaction_seq(tcp_stream_exdata, &max_req_seq, &max_res_seq);
-                exdata = httpd_session_exdata_new(sess, httpd_env, max_req_seq, max_res_seq);
-                session_exdata_set(sess, httpd_env->topic_exdata_compose[HTTPD_TOPIC_HTTP_TUNNEL_INDEX].exdata_id, exdata);
-                exdata->pub_topic_id = httpd_env->topic_exdata_compose[HTTPD_TOPIC_HTTP_MSG_INDEX].sub_topic_id;
-                exdata->in_tunnel_is_http = 1;
-            }
-            else
-            {
-                // inner tunnel is not http, do nothing, do not push this message again !!!
-                session_mq_ignore_message(sess, topic_id, httpd_env->plugin_id);
-                return;
-            }
-        }
-        break;
-
-        case HTTP_TUNNEL_ACTIVE:
-            if (NULL == exdata)
-            {
-                session_mq_ignore_message(sess, topic_id, httpd_env->plugin_id);
-                http_decoder_stat_update(&httpd_env->hd_stat, stellar_get_current_thread_index(), HTTP_STAT_PARSE_ERR, 1);
-                return;
-            }
-            break;
-
-        case HTTP_TUNNEL_CLOSING:
-            if (NULL == exdata)
-            {
-                http_decoder_stat_update(&httpd_env->hd_stat, stellar_get_current_thread_index(), HTTP_STAT_PARSE_ERR, 1);
-                return;
-            }
-            if (exdata->in_tunnel_is_http)
-            {
-                http_half_pre_context_free(sess, exdata);
-            }
             return;
-            break;
-
-        default:
-            break;
         }
-        if (exdata->in_tunnel_is_http)
-        {
-            http_decoder_execute(sess, httpd_env, exdata, payload, payload_len);
-        }
-        return;
     }
 
-    void http_decoder_tcp_stream_msg_cb(struct session *sess, int topic_id, const void *msg, void *nouse_session_ctx, void *plugin_env)
+    void http_decoder_tcp_stream_msg_cb(struct session *sess, UNUSED int topic_id, const void *msg, UNUSED void *nouse_session_ctx, void *plugin_env)
     {
         struct http_decoder_env *httpd_env = (struct http_decoder_env *)plugin_env;
         struct http_decoder_exdata *exdata = (struct http_decoder_exdata *)session_exdata_get(sess, httpd_env->topic_exdata_compose[HTTPD_TOPIC_TCP_STREAM_INDEX].exdata_id);
@@ -783,14 +549,7 @@ extern "C"
 
         if (SESSION_STATE_CLOSED == sess_state)
         {
-            if (httpd_in_tunnel_transmitting(httpd_env, exdata))
-            {
-                http_decoder_push_tunnel_data(sess, exdata, HTTP_TUNNEL_CLOSING, NULL, 0);
-            }
-            else
-            {
-                http_half_pre_context_free(sess, exdata);
-            }
+            http_half_pre_context_free(sess, exdata);
             return;
         }
         assert(msg != NULL);
@@ -810,7 +569,8 @@ extern "C"
                 stellar_session_plugin_dettach_current_session(sess);
                 return;
             }
-            exdata = httpd_session_exdata_new(sess, httpd_env, 0, 0);
+            exdata = httpd_session_exdata_new(httpd_env, 0, 0);
+            exdata->sess = sess;
             exdata->pub_topic_id = httpd_env->topic_exdata_compose[HTTPD_TOPIC_HTTP_MSG_INDEX].sub_topic_id;
             session_exdata_set(sess, httpd_env->topic_exdata_compose[HTTPD_TOPIC_TCP_STREAM_INDEX].exdata_id, exdata);
         }
@@ -818,17 +578,16 @@ extern "C"
         return;
     }
 
-    static const struct http_topic_exdata_compose g_topic_exdata_compose[HTTPD_TOPIC_INDEX_MAX] =
+    static const struct http_topic_exdata_compose g_topic_exdata_compose[] =
         {
             {HTTPD_TOPIC_TCP_STREAM_INDEX, TOPIC_TCP_STREAM, http_decoder_tcp_stream_msg_cb, NULL, "HTTP_DECODER_EXDATA_BASEON_TCP_STREAM", httpd_ex_data_free_cb, -1, -1},
             {HTTPD_TOPIC_HTTP_MSG_INDEX, HTTP_TOPIC, NULL, http_message_free, NULL, NULL, -1, -1},
-            {HTTPD_TOPIC_HTTP_TUNNEL_INDEX, HTTP_DECODER_TUNNEL_TOPIC, http_decoder_tunnel_msg_cb, http_message_free, "HTTP_DECODER_EXDATA_BASEON_HTTP_TUNNEL", httpd_ex_data_free_cb, -1, -1},
     };
 
     static void http_decoder_topic_exdata_compose_init(struct http_decoder_env *httpd_env)
     {
         memcpy(httpd_env->topic_exdata_compose, g_topic_exdata_compose, sizeof(g_topic_exdata_compose));
-        for (int i = 0; i < HTTPD_TOPIC_INDEX_MAX; i++)
+        for (size_t i = 0; i < sizeof(g_topic_exdata_compose) / sizeof(struct http_topic_exdata_compose); i++)
         {
             httpd_env->topic_exdata_compose[i].sub_topic_id = stellar_session_mq_get_topic_id_reliable(httpd_env->st,
                                                                                                        httpd_env->topic_exdata_compose[i].topic_name,
@@ -877,8 +636,7 @@ extern "C"
             goto failed;
         }
         httpd_env->st = st;
-        httpd_env->plugin_id = stellar_session_plugin_register(st, httpd_session_ctx_new_cb,
-                                                               httpd_session_ctx_free_cb, (void *)httpd_env);
+        httpd_env->plugin_id = stellar_session_plugin_register(st, NULL, NULL, (void *)httpd_env);
         if (httpd_env->plugin_id < 0)
         {
             goto failed;
@@ -920,132 +678,83 @@ extern "C"
         return msg->type;
     }
 
-    void http_message_get0_request_line(const struct http_message *msg,
-                                        struct http_request_line *line)
+    const struct http_request_line *http_message_get0_request_line(const struct http_message *msg)
     {
-        if (unlikely(NULL == msg || msg->type != HTTP_MESSAGE_REQ_LINE))
+        if (unlikely(NULL == msg || (msg->type != HTTP_MESSAGE_REQ_LINE_HEADERS)))
         {
-            if (line)
-            {
-                line->method = NULL;
-                line->uri = NULL;
-                line->version = NULL;
-            }
-            return;
+            return NULL;
         }
         assert(msg->ref_queue);
         assert(msg->queue_index < HD_RESULT_QUEUE_LEN);
 
-        struct http_decoder_half_data *req_data =
-            msg->ref_queue->array[msg->queue_index].req_data;
+        struct http_decoder_half_data *req_data = msg->ref_queue->array[msg->queue_index].req_data;
 
-        http_decoder_half_data_get_request_line(req_data, line);
+        return http_decoder_half_data_get_request_line(req_data);
     }
 
-    void http_message_get0_response_line(const struct http_message *msg,
-                                         struct http_response_line *line)
+    const struct http_response_line *http_message_get0_response_line(const struct http_message *msg)
     {
-        if (unlikely(NULL == msg || msg->type != HTTP_MESSAGE_RES_LINE))
+        if (unlikely(NULL == msg || (msg->type != HTTP_MESSAGE_RES_LINE_HEADERS)))
         {
-            if (line)
-            {
-                line->version = NULL;
-                line->status = NULL;
-            }
-            return;
+            return NULL;
         }
         assert(msg->ref_queue);
         assert(msg->queue_index < HD_RESULT_QUEUE_LEN);
 
-        struct http_decoder_half_data *res_data =
-            msg->ref_queue->array[msg->queue_index].res_data;
-
-        http_decoder_half_data_get_response_line(res_data, line);
+        struct http_decoder_half_data *res_data = msg->ref_queue->array[msg->queue_index].res_data;
+        return http_decoder_half_data_get_response_line(res_data);
     }
 
-    void http_message_get0_header(const struct http_message *msg, const char *name, size_t name_len,
-                                  struct http_header_field *hdr_result)
+    const struct http_header_field *http_message_get0_header(const struct http_message *msg, const char *field_name, size_t field_name_len)
     {
-        int ret = -1;
-        if (unlikely(NULL == msg || NULL == name || 0 == name_len))
+        if (unlikely(NULL == msg || NULL == field_name || 0 == field_name_len))
         {
-            goto fail;
+            return NULL;
         }
         assert(msg->ref_queue);
         assert(msg->queue_index < HD_RESULT_QUEUE_LEN);
-        if (HTTP_MESSAGE_REQ_HEADER == msg->type)
-        {
-            ret = http_msg_get_request_header(msg, name, name_len, hdr_result);
-        }
-        else if (HTTP_MESSAGE_RES_HEADER == msg->type)
+        const struct http_decoder_half_data *half_data = NULL;
+        const struct http_header_field *expect_header = NULL;
+        if (HTTP_MESSAGE_REQ_LINE_HEADERS == msg->type)
         {
-            ret = http_msg_get_response_header(msg, name, name_len, hdr_result);
+            half_data = msg->ref_queue->array[msg->queue_index].req_data;
+            expect_header = http_half_get_header_field(half_data, field_name, field_name_len);
         }
-        if (ret >= 0)
-        {
-            return;
-        }
-    fail:
-        if (hdr_result)
+        else if (HTTP_MESSAGE_RES_LINE_HEADERS == msg->type)
         {
-            hdr_result->name = NULL;
-            hdr_result->value = NULL;
+            half_data = msg->ref_queue->array[msg->queue_index].res_data;
+            expect_header = http_half_get_header_field(half_data, field_name, field_name_len);
         }
-        return;
-    }
 
-    int http_message_get0_next_header(const struct http_message *msg, struct http_header_field *header)
-    {
-        int ret = 1;
-        if (unlikely(NULL == msg))
-        {
-            goto fail;
-        }
-        assert(msg->ref_queue);
-        assert(msg->queue_index < HD_RESULT_QUEUE_LEN);
-        if (HTTP_MESSAGE_REQ_HEADER == msg->type)
-        {
-            ret = http_msg_request_header_next(msg, header);
-        }
-        else if (HTTP_MESSAGE_RES_HEADER == msg->type)
-        {
-            ret = http_msg_response_header_next(msg, header);
-        }
-        if (ret < 0)
-        {
-            goto fail;
-        }
-        return 0;
-    fail:
-        if (header)
-        {
-            header->name = NULL;
-            header->value = NULL;
-        }
-        return -1;
+        return expect_header;
     }
 
-    int http_message_reset_header_iter(struct http_message *msg)
+    const struct http_header_field *http_message_get0_next_header(const struct http_message *msg, const struct http_header_field *cur_header)
+    // int http_message_get0_next_header(const struct http_message *msg, struct http_header_field *header)
     {
         if (unlikely(NULL == msg))
         {
-            return -1;
+            return NULL;
         }
         assert(msg->ref_queue);
         assert(msg->queue_index < HD_RESULT_QUEUE_LEN);
-        if (HTTP_MESSAGE_REQ_HEADER == msg->type)
+        const struct http_decoder_half_data *half_data = NULL;
+        const struct http_header_field *next_header = NULL;
+
+        if (HTTP_MESSAGE_REQ_LINE_HEADERS == msg->type)
         {
-            struct http_decoder_half_data *req_data =
-                msg->ref_queue->array[msg->queue_index].req_data;
-            return http_decoder_half_data_reset_header_iter(req_data);
+            half_data = msg->ref_queue->array[msg->queue_index].req_data;
+            // ret = http_msg_request_header_next(msg, header);
+            next_header = http_half_get_next_header_field(half_data, cur_header);
         }
-        else if (HTTP_MESSAGE_RES_HEADER == msg->type)
+        else if (HTTP_MESSAGE_RES_LINE_HEADERS == msg->type)
         {
-            struct http_decoder_half_data *res_data =
-                msg->ref_queue->array[msg->queue_index].res_data;
-            return http_decoder_half_data_reset_header_iter(res_data);
+            half_data = msg->ref_queue->array[msg->queue_index].res_data;
+            next_header = http_half_get_next_header_field(half_data, cur_header);
+            // ret = http_msg_response_header_next(msg, header);
         }
-        return -1;
+
+        return next_header;
     }
 
     void http_message_get0_uncompressed_body(const struct http_message *msg, const char **body_ptr, size_t *body_len)
@@ -1073,8 +782,6 @@ extern "C"
 
     void http_message_get0_decompressed_body(const struct http_message *msg, const char **dec_body_ptr, size_t *dec_body_len)
     {
-        enum http_content_encoding ecode = HTTP_CONTENT_ENCODING_NONE;
-        struct http_decoder_half_data *ref_data = NULL;
         if (unlikely(NULL == msg))
         {
             goto fail;
@@ -1087,31 +794,7 @@ extern "C"
             *dec_body_len = msg->decompress_payload.iov_len;
             return;
         }
-        /**
-         * @brief If the body hasn't been compressed, same as http_message_get0_uncompressed_body().
-         *
-         */
-
-        if (HTTP_MESSAGE_REQ_BODY_START == msg->type || HTTP_MESSAGE_REQ_BODY == msg->type || HTTP_MESSAGE_REQ_BODY_END == msg->type)
-        {
-            ref_data = msg->ref_queue->array[msg->queue_index].req_data;
-        }
-        else if (HTTP_MESSAGE_RES_BODY_START == msg->type || HTTP_MESSAGE_RES_BODY == msg->type || HTTP_MESSAGE_RES_BODY_END == msg->type)
-        {
-            ref_data = msg->ref_queue->array[msg->queue_index].res_data;
-        }
-        ecode = http_half_data_get_content_encoding(ref_data);
-        if (ref_data != NULL && HTTP_CONTENT_ENCODING_NONE != ecode)
-        {
-            goto fail;
-        }
 
-        if (msg->raw_payload.iov_base != NULL && msg->raw_payload.iov_len != 0)
-        {
-            *dec_body_ptr = msg->raw_payload.iov_base;
-            *dec_body_len = msg->raw_payload.iov_len;
-        }
-        return;
     fail:
         if (dec_body_ptr)
         {
@@ -1147,39 +830,7 @@ extern "C"
         }
         return;
     }
-#if 0
-    void http_message_decoded_url_get0(const struct http_message *msg, struct iovec *url)
-    {
-        if (unlikely(NULL == msg))
-        {
-            if (url)
-            {
-                url->iov_base = NULL;
-                url->iov_len = 0;
-            }
-            return;
-        }
-        assert(msg->ref_queue);
-        assert(msg->queue_index < HD_RESULT_QUEUE_LEN);
-
-        struct http_decoder_half_data *req_data =
-            msg->ref_queue->array[msg->queue_index].req_data;
-
-        if (http_half_data_get_decode_url(req_data, url) < 0)
-        {
-            goto fail;
-        }
-        return;
 
-    fail:
-        if (url)
-        {
-            url->iov_base = NULL;
-            url->iov_len = 0;
-        }
-        return;
-    }
-#endif
     int http_message_get_transaction_seq(const struct http_message *msg)
     {
         if (unlikely(NULL == msg))
diff --git a/decoders/http/http_decoder_half.c b/decoders/http/http_decoder_half.c
index 70991c6..cd998fe 100644
--- a/decoders/http/http_decoder_half.c
+++ b/decoders/http/http_decoder_half.c
@@ -1,9 +1,11 @@
+#include "http_decoder_half.h"
 #include <assert.h>
 #include <stdio.h>
 #include <string.h>
 #include <arpa/inet.h>
 #include "http_decoder_private.h"
 #include "llhttp.h"
+#include "stellar/session.h"
 #include "uthash/utlist.h"
 
 struct http_decompress_buffer
@@ -13,30 +15,53 @@ struct http_decompress_buffer
     struct http_decompress_buffer *next, *prev;
 };
 
-struct http_decoder_half_data
+struct http_header_field_inner
 {
-    struct http_decoder_table *table;
+    struct http_header_field field;
+    struct http_header_field_inner *next, *prev;
+};
 
-    int major_version;
-    int minor_version;
-    int status_code;
+struct http_request_line_inner
+{
+    struct http_request_line req_line;
+};
 
-    enum http_event state;
+struct http_response_line_inner
+{
+    struct http_response_line res_line;
+};
 
+struct http_decoder_half_data
+{
+    enum flow_type flow_dir;
+    enum http_event state;
     enum http_content_encoding content_encoding;
     struct http_content_decompress *decompress;
-#if 0    
-    char *ref_decompress_body;
-    size_t decompress_body_len;
-#else
+    int transfer_encoding_is_chunked; // -1: not set, 0: false, 1: true
+    long long content_length;         // -1: not set;   >=0:  remain length
+    hstring raw_body;
     struct http_decompress_buffer *decompress_buffer_list;
-#endif
-    int joint_url_complete;
-    int url_is_encoded;
     // http://<host>[:<port>]/<path>?<searchpart>
     hstring joint_url;
-    hstring decoded_url;
     long long transaction_index;
+    union
+    {
+        struct http_request_line_inner req_line_inner;
+        struct http_response_line_inner res_line_inner;
+    };
+    struct http_header_field_inner *filed_list;
+    struct http_buffer *ref_headers_cache; /* take the ownership when headers completed, free in http_message_free() */
+    const char *ref_headers_start;
+    const char *ref_headers_end;
+};
+
+struct http_flow_stage
+{
+    enum http_stage stage;
+    long long remain_content_length;
+    const char *headers_start;
+    const char *headers_end;
+    struct http_buffer *headers_cache; /* ownership move to struct http_decoder_half_data when headers completed */
 };
 
 struct http_decoder_half
@@ -46,40 +71,77 @@ struct http_decoder_half
     enum llhttp_errno error;
     int decompress_switch;
     struct http_decoder_env *httpd_env;
-
-    // uint8_t is_request_flow;
     enum http_event event;
     http_event_cb *http_ev_cb;
     struct http_event_context *http_ev_ctx;
-
-    struct http_decoder_half_data *ref_data;
-
+    struct http_decoder_half_data *ref_data; /* pointer to current half_data on_message_begin */
     long long trans_counter;
     long long err_counter;
     long long transaction_seq; // accumulated
-
     const char *data;
-    int data_len;
+    size_t data_len;
+    struct http_flow_stage stage_shaper;
 };
 
-// #define HTTP_DECODER_DEBUG
-#ifdef HTTP_DECODER_DEBUG
-static void printf_debug_info(const char *desc, const char *at, size_t length)
+hstring *http_half_get_raw_body(struct http_decoder_half_data *data)
+{
+    return &data->raw_body;
+}
+
+void http_half_headers_ref_free(struct http_decoder_half_data *half_data)
 {
-    if (at)
+    struct http_header_field_inner *el, *tmp;
+    DL_FOREACH_SAFE(half_data->filed_list, el, tmp)
     {
-        char *temp = http_safe_dup(at, length);
-        printf("HTTP PARSER STAGE: %s: %s\n", desc, temp);
-        FREE(temp);
+        DL_DELETE(half_data->filed_list, el);
+        FREE(el);
     }
-    else
+    half_data->filed_list = NULL;
+}
+
+static void http_half_append_header_filed(struct http_decoder_half_data *half_data, const char *at, size_t length)
+{
+    struct http_header_field_inner *inner_field = CALLOC(struct http_header_field_inner, 1);
+    assert(inner_field);
+    inner_field->field.name = at;
+    inner_field->field.name_len = length;
+    DL_APPEND(half_data->filed_list, inner_field);
+}
+
+static void http_half_append_header_value(struct http_decoder_half_data *half_data, const char *at, size_t length)
+{
+    struct http_header_field_inner *inner_field = half_data->filed_list->prev;
+    assert(inner_field);
+    inner_field->field.value = at;
+    inner_field->field.value_len = length;
+}
+
+const struct http_header_field *http_half_get_next_header_field(const struct http_decoder_half_data *half_data, const struct http_header_field *current_header)
+{
+    if (NULL == current_header)
+    { // first time
+        return &half_data->filed_list->field;
+    }
+    const struct http_header_field_inner *inner_fidld = container_of(current_header, struct http_header_field_inner, field);
+    if (inner_fidld->next == half_data->filed_list)
+    { // the last item
+        return NULL;
+    }
+    return &inner_fidld->next->field;
+}
+
+const struct http_header_field *http_half_get_header_field(const struct http_decoder_half_data *half_data, const char *field_name, size_t field_name_len)
+{
+    struct http_header_field_inner *el;
+    DL_FOREACH(half_data->filed_list, el)
     {
-        printf("HTTP PARSER STAGE: %s\n", desc);
+        if (http_strncasecmp_safe(el->field.name, field_name, el->field.name_len, field_name_len) == 0)
+        {
+            return &el->field;
+        }
     }
+    return NULL;
 }
-#else
-#define printf_debug_info(desc, at, length)
-#endif
 
 void http_half_decompress_buffer_free(struct http_decoder_half_data *data, hstring *decompress_body)
 {
@@ -125,19 +187,15 @@ void http_half_get_lastest_decompress_buffer(struct http_decoder_half_data *data
 static void http_decoder_half_data_decompress(struct http_decoder_half_data *data)
 {
     assert(data);
-
     if (data->content_encoding == HTTP_CONTENT_ENCODING_NONE)
     {
         return;
     }
-
-    hstring raw_body = {};
-    http_decoder_table_get_body(data->table, (char **)&raw_body.iov_base, &raw_body.iov_len);
-    if (raw_body.iov_base == NULL || raw_body.iov_len == 0)
+    hstring *raw_body = &data->raw_body;
+    if (raw_body->iov_base == NULL || raw_body->iov_len == 0)
     {
         return;
     }
-
     if (NULL == data->decompress)
     {
         data->decompress = http_content_decompress_create(data->content_encoding);
@@ -146,12 +204,9 @@ static void http_decoder_half_data_decompress(struct http_decoder_half_data *dat
     assert(data->decompress);
     char *local_outdata = NULL;
     size_t local_outdata_len = 0;
-    if (http_content_decompress_write(data->decompress, (char *)raw_body.iov_base,
-                                      raw_body.iov_len,
-                                      &local_outdata,
-                                      &local_outdata_len) == -1)
+    if (http_content_decompress_write(data->decompress, (char *)raw_body->iov_base,
+                                      raw_body->iov_len, &local_outdata, &local_outdata_len) == -1)
     {
-        // log error
         http_content_decompress_destroy(data->decompress);
         data->decompress = NULL;
         return;
@@ -171,8 +226,6 @@ static void http_decoder_half_data_decompress(struct http_decoder_half_data *dat
 /* Possible return values 0, -1, `HPE_PAUSED` */
 static int on_message_begin(llhttp_t *http)
 {
-    printf_debug_info("on_message_begin", NULL, 0);
-
     struct http_decoder_half *half = container_of(http, struct http_decoder_half, parser);
     assert(half);
 
@@ -186,19 +239,19 @@ static int on_message_begin(llhttp_t *http)
     }
 
     half->ref_data = NULL;
-
     assert(half->http_ev_cb != NULL);
     half->http_ev_cb(half->event, &half->ref_data, half->http_ev_ctx, half->httpd_env); // http_event_handler()
 
     half->trans_counter++;
     half->ref_data->transaction_index = half->transaction_seq++;
+
+    half->ref_data->ref_headers_cache = half->stage_shaper.headers_cache;
+    half->stage_shaper.headers_cache = NULL;
     return 0;
 }
 
 static int on_message_complete(llhttp_t *http)
 {
-    printf_debug_info("on_message_complete", NULL, 0);
-
     struct http_decoder_half *half = container_of(http, struct http_decoder_half, parser);
     assert(half);
 
@@ -231,261 +284,122 @@ static int on_message_complete(llhttp_t *http)
         half->http_ev_cb(half->event, &half->ref_data, half->http_ev_ctx, half->httpd_env);
     }
 
+    half->event = __HTTP_EVENT_RESERVED;
+    half->stage_shaper.stage = HTTP_STAGE_INIT;
     return 0;
 }
 
-static int on_reset(llhttp_t *http __attribute__((unused)))
-{
-    printf_debug_info("on_reset", NULL, 0);
-
-    return 0;
-}
-
-static inline int is_line_crlf(struct http_decoder_half *half)
+static int on_method(llhttp_t *http, const char *at, size_t length)
 {
-    const char *chr_r = (char *)memrchr(half->data, '\r', half->data_len);
-    const char *chr_n = (char *)memrchr(half->data, '\n', half->data_len);
-    if (chr_r && chr_n && (chr_r + 1 == chr_n))
+    if (0 == length)
     {
-        return 1;
+        return 0;
     }
-    return 0;
-}
-
-static int on_method(llhttp_t *http, const char *at, size_t length)
-{
-    printf_debug_info("on_method", at, length);
-
     struct http_decoder_half *half = container_of(http, struct http_decoder_half, parser);
     assert(half);
-
-    http_decoder_table_refer(half->ref_data->table, HTTP_ITEM_METHOD, at, length);
-    return 0;
-}
-
-/* Information-only callbacks, return value is ignored */
-static int on_method_complete(llhttp_t *http)
-{
-    printf_debug_info("on_method_complete", NULL, 0);
-
-    struct http_decoder_half *half = container_of(http, struct http_decoder_half, parser);
-    assert(half);
-
-    if (is_line_crlf(half) == 0)
-    {
-        http_decoder_table_cache(half->ref_data->table, HTTP_ITEM_METHOD);
-    }
-
-    http_decoder_table_commit(half->ref_data->table, HTTP_ITEM_METHOD);
-
+    half->ref_data->req_line_inner.req_line.method = (char *)at;
+    half->ref_data->req_line_inner.req_line.method_len = length;
     return 0;
 }
 
 /* Possible return values 0, -1, HPE_USER */
 static int on_uri(llhttp_t *http, const char *at, size_t length)
 {
-    printf_debug_info("on_uri", at, length);
-
-    struct http_decoder_half *half = container_of(http, struct http_decoder_half, parser);
-    assert(half);
-
-    http_decoder_table_refer(half->ref_data->table, HTTP_ITEM_URI, at, length);
-    return 0;
-}
-
-static void http_decoder_cached_portion_url(struct http_decoder_half *half, const hstring *uri_result)
-{
-    struct http_decoder_half_data *ref_data = half->ref_data;
-    int uri_skip_len = 0;
-
-    if ((uri_result->iov_len) > 7 && (strncasecmp("http://", (char *)uri_result->iov_base, 7) == 0)) // absolute URI
-    {
-        uri_skip_len = strlen("http://");
-        ref_data->joint_url_complete = 1;
-    }
-    else
+    if (0 == length)
     {
-        ref_data->joint_url_complete = 0;
+        return 0;
     }
-
-    ref_data->joint_url.iov_len = uri_result->iov_len - uri_skip_len;
-    ref_data->joint_url.iov_base = MEMPOOL_CALLOC(half->http_ev_ctx->ref_mempool, char, ref_data->joint_url.iov_len);
-    memcpy(ref_data->joint_url.iov_base, (char *)uri_result->iov_base + uri_skip_len, ref_data->joint_url.iov_len);
-}
-
-/* Information-only callbacks, return value is ignored */
-static int on_uri_complete(llhttp_t *http)
-{
-    printf_debug_info("on_uri_complete", NULL, 0);
-
     struct http_decoder_half *half = container_of(http, struct http_decoder_half, parser);
     assert(half);
 
-    if (is_line_crlf(half) == 0)
-    {
-        http_decoder_table_cache(half->ref_data->table, HTTP_ITEM_URI);
-    }
-
-    http_decoder_table_commit(half->ref_data->table, HTTP_ITEM_URI);
-
-    hstring uri_result = {};
-    http_decoder_table_get_uri(half->ref_data->table, (char **)&uri_result.iov_base, &uri_result.iov_len);
-    assert(uri_result.iov_base);
-    http_decoder_cached_portion_url(half, &uri_result);
-
+    half->ref_data->req_line_inner.req_line.uri = (char *)at;
+    half->ref_data->req_line_inner.req_line.uri_len = length;
     return 0;
 }
 
 /* Possible return values 0, -1, HPE_USER */
 static int on_version(llhttp_t *http, const char *at, size_t length)
 {
-    printf_debug_info("on_version", at, length);
-
+    if (0 == length)
+    {
+        return 0;
+    }
     struct http_decoder_half *half = container_of(http, struct http_decoder_half, parser);
     assert(half);
-
-    http_decoder_table_refer(half->ref_data->table, HTTP_ITEM_VERSION, at, length);
+    if (half->parser.type == HTTP_REQUEST)
+    {
+        half->ref_data->req_line_inner.req_line.version = (char *)at;
+        half->ref_data->req_line_inner.req_line.version_len = length;
+    }
+    else
+    {
+        half->ref_data->res_line_inner.res_line.version = (char *)at;
+        half->ref_data->res_line_inner.res_line.version_len = length;
+    }
     return 0;
 }
 
 /* Information-only callbacks, return value is ignored */
 static int on_version_complete(llhttp_t *http)
 {
-    printf_debug_info("on_version_complete", NULL, 0);
-
     struct http_decoder_half *half = container_of(http, struct http_decoder_half, parser);
     assert(half);
 
-    if (is_line_crlf(half) == 0)
+    if (half->parser.type == HTTP_REQUEST)
     {
-        http_decoder_table_cache(half->ref_data->table, HTTP_ITEM_VERSION);
+        half->ref_data->req_line_inner.req_line.major_version = llhttp_get_http_major(&half->parser);
+        half->ref_data->req_line_inner.req_line.minor_version = llhttp_get_http_minor(&half->parser);
     }
-
-    http_decoder_table_commit(half->ref_data->table, HTTP_ITEM_VERSION);
-
-    half->ref_data->major_version = llhttp_get_http_major(&half->parser);
-    half->ref_data->minor_version = llhttp_get_http_minor(&half->parser);
-
-    if (half->parser.type == HTTP_REQUEST)
+    else
     {
-        half->event = HTTP_EVENT_REQ_LINE;
-        if (half->http_ev_cb) // http_event_handler()
-        {
-            half->http_ev_cb(half->event, &half->ref_data, half->http_ev_ctx, half->httpd_env);
-        }
+        half->ref_data->res_line_inner.res_line.major_version = llhttp_get_http_major(&half->parser);
+        half->ref_data->res_line_inner.res_line.minor_version = llhttp_get_http_minor(&half->parser);
     }
-
     return 0;
 }
 
 /* Possible return values 0, -1, HPE_USER */
 static int on_status(llhttp_t *http, const char *at, size_t length)
 {
-    printf_debug_info("on_status", at, length);
-
     struct http_decoder_half *half = container_of(http, struct http_decoder_half, parser);
     assert(half);
-
-    http_decoder_table_refer(half->ref_data->table, HTTP_ITEM_STATUS, at, length);
+    half->ref_data->res_line_inner.res_line.status = (char *)at;
+    half->ref_data->res_line_inner.res_line.status_len = length;
     return 0;
 }
 
 /* Information-only callbacks, return value is ignored */
 static int on_status_complete(llhttp_t *http)
 {
-    printf_debug_info("on_status_complete", NULL, 0);
-
     struct http_decoder_half *half = container_of(http, struct http_decoder_half, parser);
     assert(half);
-
-    if (is_line_crlf(half) == 0)
-    {
-        http_decoder_table_cache(half->ref_data->table, HTTP_ITEM_STATUS);
-    }
-
-    http_decoder_table_commit(half->ref_data->table, HTTP_ITEM_STATUS);
-    half->ref_data->status_code = llhttp_get_status_code(&half->parser);
-
-    if (half->parser.type == HTTP_RESPONSE)
-    {
-        half->event = HTTP_EVENT_RES_LINE;
-        if (half->http_ev_cb != NULL) // http_event_handler()
-        {
-            half->http_ev_cb(half->event, &half->ref_data, half->http_ev_ctx, half->httpd_env);
-        }
-    }
-
+    half->ref_data->res_line_inner.res_line.status_code = llhttp_get_status_code(&half->parser);
     return 0;
 }
 
 /* Possible return values 0, -1, HPE_USER */
 static int on_header_field(llhttp_t *http, const char *at, size_t length)
 {
-    printf_debug_info("on_header_field", at, length);
-
-    struct http_decoder_half *half = container_of(http, struct http_decoder_half, parser);
-    assert(half);
-
-    http_decoder_table_refer(half->ref_data->table, HTTP_ITEM_HDRKEY, at, length);
-    return 0;
-}
-
-/* Information-only callbacks, return value is ignored */
-static int on_header_field_complete(llhttp_t *http)
-{
-    printf_debug_info("on_header_field_complete", NULL, 0);
-
+    if (0 == length)
+    {
+        return 0;
+    }
     struct http_decoder_half *half = container_of(http, struct http_decoder_half, parser);
     assert(half);
-
-    http_decoder_table_commit(half->ref_data->table, HTTP_ITEM_HDRKEY);
-
+    http_half_append_header_filed(half->ref_data, at, length);
     return 0;
 }
 
 /* Possible return values 0, -1, HPE_USER */
 static int on_header_value(llhttp_t *http, const char *at, size_t length)
 {
-    printf_debug_info("on_header_value", at, length);
-
-    struct http_decoder_half *half = container_of(http, struct http_decoder_half, parser);
-    assert(half);
-
-    http_decoder_table_refer(half->ref_data->table, HTTP_ITEM_HDRVAL, at, length);
-    return 0;
-}
-
-#define MAX_ENCODING_STR_LEN 8
-/* Information-only callbacks, return value is ignored */
-static int on_header_value_complete(llhttp_t *http)
-{
-    printf_debug_info("on_header_value_complete", NULL, 0);
-
-    struct http_decoder_half *half = container_of(http, struct http_decoder_half, parser);
-    assert(half);
-
-    if (http_decoder_table_state(half->ref_data->table, HTTP_ITEM_HDRKEY) ==
-        STRING_STATE_CACHE)
-    {
-        http_decoder_table_commit(half->ref_data->table, HTTP_ITEM_HDRKEY);
-    }
-
-    http_decoder_table_commit(half->ref_data->table, HTTP_ITEM_HDRVAL);
-
-    if (half->ref_data->content_encoding == HTTP_CONTENT_ENCODING_NONE)
-    {
-        struct http_header_field http_hdr = {};
-
-        if (http_decoder_table_get_header(half->ref_data->table, (char *)"Content-Encoding", 16, &http_hdr) == 0)
-        {
-            half->ref_data->content_encoding = http_content_encoding_str2int(http_hdr.value, http_hdr.value_len);
-        }
-    }
-
-    if (http->type == HTTP_REQUEST)
+    if (0 == length)
     {
-        http_decoder_get_host_feed_url(half);
+        return 0;
     }
+    struct http_decoder_half *half = container_of(http, struct http_decoder_half, parser);
+    assert(half);
+    http_half_append_header_value(half->ref_data, at, length);
     return 0;
 }
 
@@ -495,8 +409,6 @@ static int on_header_value_complete(llhttp_t *http)
  */
 static int on_chunk_header(llhttp_t *http __attribute__((unused)))
 {
-    printf_debug_info("on_chunk_header", NULL, 0);
-
     return 0;
 }
 
@@ -506,8 +418,6 @@ static int on_chunk_header(llhttp_t *http __attribute__((unused)))
  */
 static int on_chunk_header_complete(llhttp_t *http __attribute__((unused)))
 {
-    printf_debug_info("on_chunk_header_complete", NULL, 0);
-
     return 0;
 }
 
@@ -519,14 +429,10 @@ static int on_chunk_header_complete(llhttp_t *http __attribute__((unused)))
  */
 static int on_headers_complete(llhttp_t *http)
 {
-    printf_debug_info("on_headers_complete", NULL, 0);
-
     struct http_decoder_half *half = container_of(http, struct http_decoder_half, parser);
     assert(half);
     assert(half->ref_data);
 
-    http_decoder_table_set_header_complete(half->ref_data->table);
-
     if (half->parser.type == HTTP_REQUEST)
     {
         half->event = HTTP_EVENT_REQ_HDR_END;
@@ -535,19 +441,25 @@ static int on_headers_complete(llhttp_t *http)
     {
         half->event = HTTP_EVENT_RES_HDR_END;
     }
+    half->ref_data->ref_headers_start = half->stage_shaper.headers_start;
+    half->ref_data->ref_headers_end = half->stage_shaper.headers_end;
     half->http_ev_cb(half->event, &half->ref_data, half->http_ev_ctx, half->httpd_env); // http_event_handler()
-
     return 0;
 }
 
 /* Possible return values 0, -1, HPE_USER */
 static int on_body(llhttp_t *http, const char *at, size_t length)
 {
-    printf_debug_info("on_body", at, length);
-
+    if (0 == length)
+    {
+        return 0;
+    }
     struct http_decoder_half *half = container_of(http, struct http_decoder_half, parser);
     assert(half);
 
+    half->ref_data->raw_body.iov_base = (void *)NULL;
+    half->ref_data->raw_body.iov_len = 0;
+
     // trigger body_begin event
     if (half->parser.type == HTTP_REQUEST)
     {
@@ -566,17 +478,8 @@ static int on_body(llhttp_t *http, const char *at, size_t length)
         }
     }
 
-    if (half->ref_data != NULL)
-    {
-        if (http_decoder_table_state(half->ref_data->table, HTTP_ITEM_BODY) ==
-            STRING_STATE_COMMIT)
-        {
-            http_decoder_table_reset(half->ref_data->table, HTTP_ITEM_BODY);
-        }
-
-        http_decoder_table_refer(half->ref_data->table, HTTP_ITEM_BODY, at, length);
-        http_decoder_table_commit(half->ref_data->table, HTTP_ITEM_BODY);
-    }
+    half->ref_data->raw_body.iov_base = (void *)at;
+    half->ref_data->raw_body.iov_len = length;
 
     if (1 == half->decompress_switch && half->ref_data->content_encoding != HTTP_CONTENT_ENCODING_NONE)
     {
@@ -602,35 +505,20 @@ static void http_decoder_half_init(struct http_decoder_half *half, http_event_cb
     llhttp_settings_init(&half->settings);
     llhttp_init(&half->parser, type, &half->settings);
 
-    // half->is_request_flow = (type == HTTP_REQUEST) ? 1 : 0;
     half->settings.on_message_begin = on_message_begin;
     half->settings.on_message_complete = on_message_complete;
-    half->settings.on_reset = on_reset;
-
     half->settings.on_url = on_uri;
-    half->settings.on_url_complete = on_uri_complete;
-
     half->settings.on_status = on_status;
     half->settings.on_status_complete = on_status_complete;
-
     half->settings.on_method = on_method;
-    half->settings.on_method_complete = on_method_complete;
-
     half->settings.on_version = on_version;
     half->settings.on_version_complete = on_version_complete;
-
     half->settings.on_header_field = on_header_field;
-    half->settings.on_header_field_complete = on_header_field_complete;
-
     half->settings.on_header_value = on_header_value;
-    half->settings.on_header_value_complete = on_header_value_complete;
-
     half->settings.on_chunk_header = on_chunk_header;
     half->settings.on_chunk_complete = on_chunk_header_complete;
-
     half->settings.on_headers_complete = on_headers_complete;
     half->settings.on_body = on_body;
-
     half->error = HPE_OK;
     half->http_ev_cb = http_ev_cb; // http_event_handler()
     half->ref_data = NULL;
@@ -658,13 +546,13 @@ void http_decoder_half_free(nmx_pool_t *mempool, struct http_decoder_half *half)
     {
         return;
     }
-
     if (half->http_ev_ctx != NULL)
     {
         MEMPOOL_FREE(mempool, half->http_ev_ctx);
         half->http_ev_ctx = NULL;
     }
-
+    http_buffer_free(half->stage_shaper.headers_cache);
+    half->stage_shaper.headers_cache = NULL;
     MEMPOOL_FREE(mempool, half);
 }
 
@@ -673,44 +561,46 @@ void http_decoder_half_reinit(struct http_decoder_half *half,
                               nmx_pool_t *mempool, struct session *sess)
 {
     assert(half != NULL);
-    if (half->ref_data != NULL)
-    {
-        http_decoder_table_reinit(half->ref_data->table);
-    }
     half->http_ev_ctx->ref_mempool = mempool;
     half->http_ev_ctx->ref_session = sess;
     half->http_ev_ctx->ref_queue = queue;
 }
 
-static void publish_message_for_parsed_header(struct http_decoder_half *half)
+static int http_half_cache_merge(struct http_decoder_half *half, const char *newdata, size_t newdata_len)
 {
-    if (0 == http_decoder_table_has_parsed_header(half->ref_data->table))
+    struct http_flow_stage *stage_shaper = &half->stage_shaper;
+    if (stage_shaper->headers_cache == NULL || stage_shaper->headers_cache->buffer == NULL || stage_shaper->headers_cache->buffer_size == 0)
     {
-        return;
+        goto not_merged;
     }
-    if (half->parser.type == HTTP_REQUEST)
+    if (half->stage_shaper.stage != HTTP_STAGE_HEADER_PARTIAL)
     {
-        half->event = HTTP_EVENT_REQ_HDR;
+        goto not_merged;
     }
-    else
+    http_buffer_add(stage_shaper->headers_cache, newdata, newdata_len);
+    half->data = stage_shaper->headers_cache->buffer;
+    half->data_len = stage_shaper->headers_cache->buffer_size;
+    return 1;
+
+not_merged:
+    half->data = newdata;
+    half->data_len = newdata_len;
+    return 0;
+}
+
+static void http_half_cache_headers(struct http_decoder_half *half, const char *newdata, size_t newdata_len)
+{
+    if (half->stage_shaper.headers_cache == NULL)
     {
-        half->event = HTTP_EVENT_RES_HDR;
+        half->stage_shaper.headers_cache = http_buffer_new();
     }
-    half->http_ev_cb(half->event, &half->ref_data, half->http_ev_ctx, half->httpd_env); // http_event_handler();
-    return;
+    http_buffer_add(half->stage_shaper.headers_cache, newdata, newdata_len);
 }
 
-int http_decoder_half_parse(int proxy_enable, struct http_decoder_half *half, const char *data, size_t data_len)
+int http_decoder_half_parse(struct http_decoder_half *half, const char *data, size_t data_len)
 {
     assert(half && data);
-
-    half->data = (const char *)data;
-    half->data_len = data_len;
     half->error = llhttp_execute(&half->parser, data, data_len);
-
-    int ret = 0;
-    enum llhttp_type type = HTTP_BOTH;
-
     switch (half->error)
     {
     case HPE_OK:
@@ -719,104 +609,140 @@ int http_decoder_half_parse(int proxy_enable, struct http_decoder_half *half, co
         llhttp_resume(&half->parser);
         break;
     case HPE_PAUSED_UPGRADE:
-        if (proxy_enable)
-        {
-            llhttp_resume_after_upgrade(&half->parser);
-        }
-        ret = 0;
+        llhttp_resume_after_upgrade(&half->parser);
         break;
     default:
-        type = (enum llhttp_type)half->parser.type;
-        llhttp_init(&half->parser, type, &half->settings);
-        ret = -1;
+        http_decoder_stat_update(&half->httpd_env->hd_stat, stellar_get_current_thread_index(), HTTP_STAT_PARSE_ERR, 1);
+        return half->error;
         break;
     }
+    return 0;
+}
 
-    if (ret < 0)
-    {
-        // fprintf(stdout,
-        //         "llhttp_execute parse error: %s err_reason:%s\n",
-        //         llhttp_errno_name(half->error), half->parser.reason);
-        return half->error;
-    }
+/*
+ *  Cache the all headers field if not completed,
+ *  Split the line, headers and body bulk.
+ */
+int http_decoder_half_stage_shaping(struct http_decoder_half *half, const char *newdata, size_t newdata_len)
+{
+    int ret = 0;
+    size_t offset = 0;
+    struct http_flow_stage *stage_shaper = &half->stage_shaper;
+    int merged = http_half_cache_merge(half, newdata, newdata_len);
+    const char *acc_data = half->data;
+    size_t acc_data_len = half->data_len;
 
-    if (half->ref_data != NULL)
+    while (offset < acc_data_len)
     {
-        if (http_decoder_table_state(half->ref_data->table, HTTP_ITEM_URI) == STRING_STATE_REFER)
-        {
-            http_decoder_table_cache(half->ref_data->table, HTTP_ITEM_URI);
-        }
-
-        if (http_decoder_table_state(half->ref_data->table, HTTP_ITEM_STATUS) == STRING_STATE_REFER)
-        {
-            http_decoder_table_cache(half->ref_data->table, HTTP_ITEM_STATUS);
-        }
-
-        if (http_decoder_table_state(half->ref_data->table, HTTP_ITEM_METHOD) == STRING_STATE_REFER)
+        switch (stage_shaper->stage)
         {
-            http_decoder_table_cache(half->ref_data->table, HTTP_ITEM_METHOD);
-        }
-
-        if (http_decoder_table_state(half->ref_data->table, HTTP_ITEM_VERSION) == STRING_STATE_REFER)
-        {
-            http_decoder_table_cache(half->ref_data->table, HTTP_ITEM_VERSION);
-        }
-
-        if (http_decoder_table_header_complete(half->ref_data->table))
-        {
-            http_decoder_table_reset_header_complete(half->ref_data->table);
-        }
-        else
-        {
-            // if headers are not completed with EOF \r\n\r\n, push the parsed headers so far
-            publish_message_for_parsed_header(half);
-        }
-
-        enum string_state hdr_key_state =
-            http_decoder_table_state(half->ref_data->table, HTTP_ITEM_HDRKEY);
-        enum string_state hdr_val_state =
-            http_decoder_table_state(half->ref_data->table, HTTP_ITEM_HDRVAL);
-
-        /*  Truncated in http header key
-            For example http header k-v => User-Agent: Chrome
-            case1:
-                packet1: User-     hdr_key_state == STRING_STATE_REFER
-                packet2: Agent: Chrome
-
-            case2:
-                packet1: User-Agent: hdr_key_state == STRING_STATE_COMMIT
-                                     hdr_val_state == STRING_STATE_INIT
-                packet2: Chrome
-        */
-        if (hdr_key_state == STRING_STATE_REFER ||
-            (hdr_key_state == STRING_STATE_COMMIT && hdr_val_state == STRING_STATE_INIT))
+        case HTTP_STAGE_INIT:
+        case HTTP_STAGE_PENDING:
+            if (http_protocol_identify(acc_data + offset, acc_data_len - offset) == 1)
+            {
+                stage_shaper->stage = HTTP_STAGE_HEADER_PARTIAL;
+            }
+            else
+            {
+                if (half->event == HTTP_EVENT_REQ_HDR_END || half->event == HTTP_EVENT_RES_HDR_END)
+                {
+                    stage_shaper->stage = HTTP_STAGE_BODY;
+                }
+                else
+                {
+                    stage_shaper->stage = HTTP_STAGE_INIT;
+                    return -1;
+                }
+            }
+            break;
+        case HTTP_STAGE_HEADER_PARTIAL:
         {
-            http_decoder_table_cache(half->ref_data->table, HTTP_ITEM_HDRKEY);
+            size_t hdr_eof_offset = http_line_header_completed(acc_data + offset, acc_data_len - offset);
+            if (hdr_eof_offset == 0)
+            {
+                if (0 == merged)
+                {
+                    http_half_cache_headers(half, acc_data + offset, acc_data_len - offset);
+                }
+                stage_shaper->stage = HTTP_STAGE_HEADER_PARTIAL;
+                offset = acc_data_len;
+            }
+            else
+            {
+                http_truncate_extract_headers(acc_data + offset, hdr_eof_offset, &stage_shaper->headers_start, &stage_shaper->headers_end);
+                ret = http_decoder_half_parse(half, acc_data + offset, hdr_eof_offset);
+                if (ret != 0)
+                {
+                    return -1;
+                }
+                if (half->ref_data->content_length > 0 || half->ref_data->transfer_encoding_is_chunked)
+                {
+                    half->stage_shaper.remain_content_length = half->ref_data->content_length;
+                    stage_shaper->stage = HTTP_STAGE_BODY;
+                }
+                else
+                {
+                    stage_shaper->stage = HTTP_STAGE_PENDING;
+                }
+                offset += hdr_eof_offset;
+            }
         }
+        break;
 
-        /* Truncated in http header value
-           For example http header k-v => User-Agent: Chrome
-           packet1: User-Agent: Ch   hdr_key_state == STRING_STATE_COMMIT
-                                     hdr_val_state == STRING_STATE_REFER
-
-           packet2: rome
-        */
-        if (http_decoder_table_state(half->ref_data->table, HTTP_ITEM_HDRVAL) == STRING_STATE_REFER)
+        case HTTP_STAGE_BODY:
         {
-            /* Header key should have been committed
-               If it's not cached, cache it for next packet to use
-            */
-            http_decoder_table_cache(half->ref_data->table, HTTP_ITEM_HDRKEY);
-            http_decoder_table_cache(half->ref_data->table, HTTP_ITEM_HDRVAL);
+            if (half->ref_data->transfer_encoding_is_chunked)
+            {
+                ret = http_decoder_half_parse(half, acc_data + offset, acc_data_len - offset);
+                if (ret != 0)
+                {
+                    return -1;
+                }
+                if (half->event == HTTP_EVENT_REQ_BODY_END || half->event == HTTP_EVENT_RES_BODY_END)
+                {
+                    stage_shaper->stage = HTTP_STAGE_PENDING;
+                }
+                offset = acc_data_len;
+            }
+            else if (half->ref_data->content_length > 0)
+            {
+                size_t body_size = MIN((size_t)half->stage_shaper.remain_content_length, acc_data_len - offset);
+                ret = http_decoder_half_parse(half, acc_data + offset, body_size);
+                if (ret != 0)
+                {
+                    return -1;
+                }
+                half->stage_shaper.remain_content_length -= body_size;
+                if (0 == half->stage_shaper.remain_content_length)
+                {
+                    stage_shaper->stage = HTTP_STAGE_PENDING;
+                }
+                else
+                {
+                    ; // body not completed, go on...
+                }
+                offset += body_size;
+            }
+            else
+            {
+                // no content-length, and not chunked,  how to do?
+                ret = http_decoder_half_parse(half, acc_data + offset, acc_data_len - offset);
+                if (ret != 0)
+                {
+                    return -1;
+                }
+                offset = acc_data_len;
+            }
         }
-
-        if (http_decoder_table_state(half->ref_data->table, HTTP_ITEM_BODY) == STRING_STATE_REFER)
-        {
-            http_decoder_table_cache(half->ref_data->table, HTTP_ITEM_BODY);
+        break;
+        default:
+            assert(0);
+            offset = acc_data_len;
+            ret = -1;
+            break;
         }
     }
-
-    return 0;
+    return ret;
 }
 
 long long http_decoder_half_trans_count(struct http_decoder_half *half)
@@ -825,30 +751,17 @@ long long http_decoder_half_trans_count(struct http_decoder_half *half)
     {
         return 0;
     }
-
     long long trans_cnt = half->trans_counter;
     half->trans_counter = 0;
-
     return trans_cnt;
 }
 
-struct http_decoder_half_data *
-http_decoder_half_data_new(nmx_pool_t *mempool)
+struct http_decoder_half_data *http_decoder_half_data_new(nmx_pool_t *mempool, enum flow_type flow_dir)
 {
-    struct http_decoder_half_data *data =
-        MEMPOOL_CALLOC(mempool, struct http_decoder_half_data, 1);
+    struct http_decoder_half_data *data = MEMPOOL_CALLOC(mempool, struct http_decoder_half_data, 1);
     assert(data);
-
-    data->table = http_decoder_table_new(mempool);
-    assert(data->table);
-
-    data->major_version = -1;
-    data->minor_version = -1;
-    data->status_code = -1;
-
+    data->flow_dir = flow_dir;
     data->content_encoding = HTTP_CONTENT_ENCODING_NONE;
-    // data->ref_decompress_body = NULL;
-    // data->decompress_body_len = 0;
     data->decompress_buffer_list = NULL;
     return data;
 }
@@ -878,13 +791,6 @@ void http_decoder_half_data_free(nmx_pool_t *mempool, struct http_decoder_half_d
     {
         return;
     }
-
-    if (data->table != NULL)
-    {
-        http_decoder_table_free(data->table);
-        data->table = NULL;
-    }
-
     if (data->decompress != NULL)
     {
         http_content_decompress_destroy(data->decompress);
@@ -895,115 +801,30 @@ void http_decoder_half_data_free(nmx_pool_t *mempool, struct http_decoder_half_d
     {
         MEMPOOL_FREE(mempool, data->joint_url.iov_base);
         data->joint_url.iov_base = NULL;
-        data->joint_url_complete = 0;
     }
     http_decoder_half_decompress_buf_free(data);
+    http_buffer_free(data->ref_headers_cache);
+    data->ref_headers_cache = NULL;
     MEMPOOL_FREE(mempool, data);
 }
 
-int http_decoder_half_data_get_request_line(struct http_decoder_half_data *data,
-                                            struct http_request_line *line)
-{
-    http_decoder_table_get_method(data->table, &line->method, &line->method_len);
-    http_decoder_table_get_uri(data->table, &line->uri, &line->uri_len);
-    http_decoder_table_get_version(data->table, &line->version, &line->version_len);
-
-    line->major_version = data->major_version;
-    line->minor_version = data->minor_version;
-
-    return 0;
-}
-
-int http_decoder_half_data_get_response_line(struct http_decoder_half_data *data,
-                                             struct http_response_line *line)
-{
-    http_decoder_table_get_version(data->table, &line->version, &line->version_len);
-    http_decoder_table_get_status(data->table, &line->status, &line->status_len);
-
-    line->major_version = data->major_version;
-    line->minor_version = data->minor_version;
-    line->status_code = data->status_code;
-
-    return 0;
-}
-
-int http_decoder_half_data_get_header(const struct http_decoder_half_data *data,
-                                      const char *name, size_t name_len,
-                                      struct http_header_field *hdr_result)
-{
-    return http_decoder_table_get_header(data->table, name, name_len, hdr_result);
-}
-
-int http_decoder_half_data_iter_header(struct http_decoder_half_data *data,
-                                       struct http_header_field *header)
-{
-    return http_decoder_table_iter_header((struct http_decoder_table *)data->table, header);
-}
-
-int http_decoder_half_data_reset_header_iter(struct http_decoder_half_data *req_data)
+const struct http_request_line *http_decoder_half_data_get_request_line(struct http_decoder_half_data *data)
 {
-    if (NULL == req_data)
-    {
-        return -1;
-    }
-    return http_decoder_table_reset_header_iter(req_data->table);
+    return &data->req_line_inner.req_line;
 }
 
-int http_decoder_half_data_has_parsed_header(struct http_decoder_half_data *data)
+const struct http_response_line *http_decoder_half_data_get_response_line(struct http_decoder_half_data *data)
 {
-    if (NULL == data)
-    {
-        return 0;
-    }
-    return http_decoder_table_has_parsed_header(data->table);
-}
-
-int http_decoder_half_data_get_raw_body(const struct http_decoder_half_data *data, const char **body, size_t *body_len)
-{
-    if (NULL == data || NULL == body)
-    {
-        return -1;
-    }
-    return http_decoder_table_get_body(data->table, (char **)body, body_len);
-}
-#if 0
-int http_decoder_half_data_get_decompress_body(const struct http_decoder_half_data *data, hstring *body)
-{
-    if (HTTP_CONTENT_ENCODING_NONE == data->content_encoding)
-    {
-        return http_decoder_table_get_body(data->table, body);
-    }
-
-    body->iov_base = data->ref_decompress_body;
-    body->iov_len = data->decompress_body_len;
-    return 0;
-}
-#endif
-
-void http_decoder_half_data_dump(struct http_decoder_half *half)
-{
-    if (NULL == half || NULL == half->ref_data)
-    {
-        return;
-    }
-
-    http_decoder_table_dump(half->ref_data->table);
+    return &data->res_line_inner.res_line;
 }
 
-static void using_session_addr_as_host(struct session *ref_session, struct http_header_field *host_result, nmx_pool_t *mempool)
+struct http_header_field *http_using_session_addr_without_host(struct session *ref_session, nmx_pool_t *mempool)
 {
-#if 1 // in native steallar, can't get the tuple4 from the session yet!!!
+    struct http_header_field *host_result = MEMPOOL_CALLOC(mempool, struct http_header_field, 1);
     struct httpd_session_addr ssaddr = {};
     httpd_session_get_addr(ref_session, &ssaddr);
-    if (ssaddr.ipver != 4 && ssaddr.ipver != 6)
-    {
-        host_result->value = MEMPOOL_CALLOC(mempool, char, 1);
-        sprintf((char *)host_result->value, "%s", "");
-        host_result->value_len = strlen((char *)host_result->value);
-        return;
-    }
-
     char ip_string_buf[INET6_ADDRSTRLEN];
+
     if (4 == ssaddr.ipver)
     {
         host_result->value = MEMPOOL_CALLOC(mempool, char, (INET_ADDRSTRLEN + 7) /* "ip:port" max length */);
@@ -1020,23 +841,31 @@ static void using_session_addr_as_host(struct session *ref_session, struct http_
     }
     else
     {
-        assert(0);
+        host_result->value = MEMPOOL_CALLOC(mempool, char, 1);
+        sprintf((char *)host_result->value, "%s", "");
+        host_result->value_len = strlen((char *)host_result->value);
+        return host_result;
     }
-#else
-    host_result->val.iov_base = MEMPOOL_CALLOC(mempool, char, 32);
-    sprintf((char *)host_result->val.iov_base, "%s", "todo:get_tuple4");
-    host_result->val.iov_len = strlen((char *)host_result->val.iov_base);
-#endif
+    return host_result;
 }
 
 void http_decoder_join_url(struct http_decoder_half_data *hfdata, nmx_pool_t *mempool, const struct http_header_field *host_hdr)
 {
     int append_slash_len = 0;
-    if ('/' != ((char *)hfdata->joint_url.iov_base)[0])
+    const char *join_uri = hfdata->req_line_inner.req_line.uri;
+    size_t join_url_len = hfdata->req_line_inner.req_line.uri_len;
+
+    if (join_url_len > 7 && strncasecmp(join_uri, "http://", 7) == 0)
+    {
+        join_uri += 7;
+        join_url_len -= 7;
+    }
+
+    if ('/' != join_uri[0])
     {
         append_slash_len = 1;
     }
-    int url_cache_str_len = host_hdr->value_len + hfdata->joint_url.iov_len + append_slash_len;
+    int url_cache_str_len = host_hdr->value_len + join_url_len + append_slash_len;
     char *url_cache_str = MEMPOOL_CALLOC(mempool, char, url_cache_str_len);
 
     char *ptr = url_cache_str;
@@ -1047,91 +876,81 @@ void http_decoder_join_url(struct http_decoder_half_data *hfdata, nmx_pool_t *me
         *ptr = '/';
         ptr++;
     }
-    memcpy(ptr, hfdata->joint_url.iov_base, hfdata->joint_url.iov_len);
+    memcpy(ptr, join_uri, join_url_len);
 
-    MEMPOOL_FREE(mempool, hfdata->joint_url.iov_base); // free the cached uri buffer
     hfdata->joint_url.iov_base = url_cache_str;
     hfdata->joint_url.iov_len = url_cache_str_len;
-    hfdata->joint_url_complete = 1;
 }
 
-void http_decoder_get_url(struct http_decoder_half_data *hfdata, nmx_pool_t *mempool)
+int http_parse_headers_finally(struct http_event_context *ev_ctx, struct http_decoder_half_data *hfdata)
 {
-    struct http_request_line reqline = {};
-    http_decoder_half_data_get_request_line(hfdata, &reqline);
-    if (unlikely(http_strncasecmp_safe("CONNECT", (char *)reqline.method, 7, reqline.method_len) == 0))
+    if (FLOW_TYPE_C2S == hfdata->flow_dir)
     {
-        hfdata->joint_url.iov_base = MEMPOOL_CALLOC(mempool, char, reqline.uri_len + 1);
-        memcpy(hfdata->joint_url.iov_base, reqline.uri, reqline.uri_len);
-        hfdata->joint_url.iov_len = reqline.uri_len;
-        hfdata->joint_url_complete = 1;
+        const struct http_header_field *host_filed = http_half_get_header_field(hfdata, "Host", 4);
+        if (NULL == host_filed)
+        {
+            host_filed = http_using_session_addr_without_host(ev_ctx->ref_session, ev_ctx->ref_mempool);
+        }
+        http_decoder_join_url(hfdata, ev_ctx->ref_mempool, host_filed);
     }
-}
 
-int http_decoder_join_url_finally(struct http_event_context *ev_ctx, struct http_decoder_half_data *hfdata, nmx_pool_t *mempool)
-{
-    if (hfdata->joint_url_complete)
+    const struct http_header_field *encoding_field = http_half_get_header_field(hfdata, "Content-Encoding", strlen("Content-Encoding"));
+    if (NULL == encoding_field)
     {
-        return 0;
+        hfdata->content_encoding = HTTP_CONTENT_ENCODING_NONE;
+    }
+    else
+    {
+        hfdata->content_encoding = http_content_encoding_str2int(encoding_field->value, encoding_field->value_len);
     }
-    struct http_header_field addr_as_host = {};
-    using_session_addr_as_host(ev_ctx->ref_session, &addr_as_host, mempool);
-    http_decoder_join_url(hfdata, mempool, &addr_as_host);
-    MEMPOOL_FREE(mempool, addr_as_host.value); // free session addr to host buffer
-    return 1;
-}
 
-void http_decoder_get_host_feed_url(struct http_decoder_half *half)
-{
-    if (half->ref_data->joint_url_complete)
+    const struct http_header_field *content_len = http_half_get_header_field(hfdata, "Content-Length", strlen("Content-Length"));
+    if (NULL == content_len)
     {
-        return;
+        hfdata->content_length = -1;
     }
-    struct http_header_field host_result = {};
-    int host_header_cnt = http_decoder_half_data_get_header(half->ref_data, (char *)"Host", 4, &host_result);
-    if (host_header_cnt < 0)
+    else
     {
-        return;
+        hfdata->content_length = http_strtoll(content_len->value, content_len->value_len);
     }
-    http_decoder_join_url(half->ref_data, half->http_ev_ctx->ref_mempool, &host_result);
-}
 
-int http_half_data_get_url(struct http_decoder_half_data *res_data, const char **url_val, size_t *url_len)
-{
-    if (0 == res_data->joint_url_complete)
+    const struct http_header_field *transf_encoding = http_half_get_header_field(hfdata, "Transfer-Encoding", strlen("Transfer-Encoding"));
+    if (NULL == transf_encoding)
     {
-        return -1;
+        hfdata->transfer_encoding_is_chunked = 0;
     }
-    *url_val = res_data->joint_url.iov_base;
-    *url_len = res_data->joint_url.iov_len;
-    return 0;
-}
-#if 0
-int http_half_data_get_decode_url(struct http_decoder_half_data *res_data, hstring *url)
-{
-    if (0 == res_data->joint_url_complete)
+    else
     {
-        return -1;
+        if (http_strncasecmp_safe(transf_encoding->value, "chunked", transf_encoding->value_len, strlen("chunked")) == 0)
+        {
+            hfdata->transfer_encoding_is_chunked = 1;
+        }
+        else
+        {
+            hfdata->transfer_encoding_is_chunked = 0;
+        }
     }
-    url->iov_base = res_data->decoded_url.iov_base;
-    url->iov_len = res_data->decoded_url.iov_len;
-    return 0;
+    return 1;
 }
-#endif
 
-int http_half_data_get_transaction_seq(struct http_decoder_half_data *hf_data)
+int http_half_data_get_url(struct http_decoder_half_data *res_data, const char **url_val, size_t *url_len)
 {
-    return hf_data->transaction_index;
+    *url_val = (char *)res_data->joint_url.iov_base;
+    *url_len = res_data->joint_url.iov_len;
+    return 0;
 }
 
-void http_half_data_update_commit_index(struct http_decoder_half_data *half_data)
+int http_half_data_get_transaction_seq(struct http_decoder_half_data *hf_data)
 {
-    http_decoder_table_update_commit_index(half_data->table);
+    return hf_data->transaction_index;
 }
 
-int http_half_data_get_total_parsed_header_count(struct http_decoder_half_data *half_data)
+int http_half_get_header_count(struct http_decoder_half_data *half_data)
 {
-    return http_decoder_table_get_total_parsed_header(half_data->table);
+    int header_count = 0;
+    struct http_header_field_inner *el;
+    DL_COUNT(half_data->filed_list, el, header_count);
+    return header_count;
 }
 
 void http_half_pre_context_free(struct session *sess, struct http_decoder_exdata *exdata)
@@ -1153,7 +972,6 @@ void http_half_pre_context_free(struct session *sess, struct http_decoder_exdata
                 session_mq_publish_message(sess, exdata->pub_topic_id, msg);
             }
         }
-
         for (size_t i = 0; i < queue->queue_size; i++)
         {
             res_data = queue->array[i].res_data;
@@ -1185,4 +1003,38 @@ enum http_content_encoding http_half_data_get_content_encoding(struct http_decod
         return HTTP_CONTENT_ENCODING_NONE;
     }
     return hf_data->content_encoding;
-}
\ No newline at end of file
+}
+
+void http_message_get0_headers_intergration(const struct http_message *msg, const char **headers, size_t *headers_len)
+{
+    if (unlikely(NULL == msg || NULL == headers || 0 == headers_len))
+    {
+        return;
+    }
+    assert(msg->ref_queue);
+    assert(msg->queue_index < HD_RESULT_QUEUE_LEN);
+    const struct http_decoder_half_data *half_data = NULL;
+    if (HTTP_MESSAGE_REQ_LINE_HEADERS == msg->type)
+    {
+        half_data = msg->ref_queue->array[msg->queue_index].req_data;
+    }
+    else if (HTTP_MESSAGE_RES_LINE_HEADERS == msg->type)
+    {
+        half_data = msg->ref_queue->array[msg->queue_index].res_data;
+    }
+    else
+    {
+        ;
+    }
+    if (half_data == NULL)
+    {
+        *headers = NULL;
+        *headers_len = 0;
+    }
+    else
+    {
+        *headers = half_data->ref_headers_start;
+        *headers_len = half_data->ref_headers_end - half_data->ref_headers_start;
+    }
+    return;
+}
diff --git a/decoders/http/http_decoder_half.h b/decoders/http/http_decoder_half.h
index f525f78..2d9a7d6 100644
--- a/decoders/http/http_decoder_half.h
+++ b/decoders/http/http_decoder_half.h
@@ -13,6 +13,7 @@ typedef struct iovec hstring;
 // only one http event is fired at a time
 enum http_event
 {
+    __HTTP_EVENT_RESERVED = 0,
     HTTP_EVENT_REQ_INIT = 1 << 1,
     HTTP_EVENT_REQ_LINE = 1 << 2,
     HTTP_EVENT_REQ_HDR = 1 << 3,
@@ -32,6 +33,14 @@ enum http_event
     HTTP_EVENT_RES_END = 1 << 16,
 };
 
+enum http_stage
+{
+    HTTP_STAGE_INIT = 0,
+    HTTP_STAGE_PENDING = 1, /* body without Content-Length, no Chunk-Encoding */
+    HTTP_STAGE_HEADER_PARTIAL = 2,
+    HTTP_STAGE_BODY = 3,
+};
+
 struct http_event_context
 {
     struct http_decoder_exdata *ref_httpd_ctx;
@@ -57,21 +66,18 @@ void http_decoder_half_reinit(struct http_decoder_half *half,
                               struct http_decoder_result_queue *queue,
                               nmx_pool_t *mempool, struct session *sess);
 
-int http_decoder_half_parse(int proxy_enable, struct http_decoder_half *half, const char *data, size_t data_len);
+int http_decoder_half_parse(struct http_decoder_half *half, const char *data, size_t data_len);
 
 long long http_decoder_half_trans_count(struct http_decoder_half *half);
 
 // http decoder half data API
-struct http_decoder_half_data *
-http_decoder_half_data_new(nmx_pool_t *mempool);
+struct http_decoder_half_data *http_decoder_half_data_new(nmx_pool_t *mempool, enum flow_type flow_dir);
 
 void http_decoder_half_data_free(nmx_pool_t *mempool, struct http_decoder_half_data *data);
 
-int http_decoder_half_data_get_request_line(struct http_decoder_half_data *data,
-                                            struct http_request_line *line);
+const struct http_request_line *http_decoder_half_data_get_request_line(struct http_decoder_half_data *data);
 
-int http_decoder_half_data_get_response_line(struct http_decoder_half_data *data,
-                                             struct http_response_line *line);
+const struct http_response_line *http_decoder_half_data_get_response_line(struct http_decoder_half_data *data);
 
 int http_decoder_half_data_get_header(const struct http_decoder_half_data *data,
                                       const char *name, size_t name_len, struct http_header_field *hdr_res);
@@ -86,24 +92,26 @@ int http_decoder_half_data_get_raw_body(const struct http_decoder_half_data *dat
 int http_decoder_half_data_get_decompress_body(const struct http_decoder_half_data *data, const char **body, size_t *body_len);
 void http_half_get_lastest_decompress_buffer(struct http_decoder_half_data *data, hstring *decompress_body);
 void http_half_decompress_buffer_free(struct http_decoder_half_data *data, hstring *decompress_body);
+void http_half_flow_buffer_free(struct http_decoder_half_data *data);
 void http_decoder_half_data_dump(struct http_decoder_half *half);
 
 void http_decoder_get_host_feed_url(struct http_decoder_half *half);
 void http_decoder_get_url(struct http_decoder_half_data *hfdata, nmx_pool_t *mempool);
 int http_half_data_get_decode_url(struct http_decoder_half_data *res_data, hstring *url);
-void http_decoder_join_url(struct http_decoder_half_data *hfdata,
-                           nmx_pool_t *mempool,
-                           const struct http_header_field *host_hdr);
-int http_decoder_join_url_finally(struct http_event_context *ev_ctx,
-                                  struct http_decoder_half_data *hfdata,
-                                  nmx_pool_t *mempool);
+void http_decoder_join_url(struct http_decoder_half_data *hfdata, nmx_pool_t *mempool, const struct http_header_field *host_hdr);
+int http_parse_headers_finally(struct http_event_context *ev_ctx, struct http_decoder_half_data *hfdata);
 int http_half_data_get_url(struct http_decoder_half_data *res_data, const char **url_val, size_t *url_len);
 int http_half_data_get_transaction_seq(struct http_decoder_half_data *hf_data);
 
 void http_half_data_update_commit_index(struct http_decoder_half_data *half_data);
 void http_half_pre_context_free(struct session *sess, struct http_decoder_exdata *exdata);
 void http_half_update_state(struct http_decoder_half_data *hf_data, enum http_event state);
-int http_half_data_get_total_parsed_header_count(struct http_decoder_half_data *half_data);
 void http_half_get_max_transaction_seq(struct http_decoder_exdata *exdata, long long *max_req_seq, long long *max_res_seq);
 
-enum http_content_encoding http_half_data_get_content_encoding(struct http_decoder_half_data *hf_data);
\ No newline at end of file
+enum http_content_encoding http_half_data_get_content_encoding(struct http_decoder_half_data *hf_data);
+const struct http_header_field *http_half_get_next_header_field(const struct http_decoder_half_data *half_data, const struct http_header_field *current_header);
+const struct http_header_field *http_half_get_header_field(const struct http_decoder_half_data *half_data, const char *field_name, size_t field_name_len);
+int http_half_get_header_count(struct http_decoder_half_data *half_data);
+hstring *http_half_get_raw_body(struct http_decoder_half_data *data);
+void http_half_headers_ref_free(struct http_decoder_half_data *half_data);
+int http_decoder_half_stage_shaping(struct http_decoder_half *half, const char *newdata, size_t newdata_len);
\ No newline at end of file
diff --git a/decoders/http/http_decoder_private.h b/decoders/http/http_decoder_private.h
index 04130f0..d6e4a54 100644
--- a/decoders/http/http_decoder_private.h
+++ b/decoders/http/http_decoder_private.h
@@ -22,11 +22,9 @@ extern "C"
 #include "stellar/http.h"
 #include "http_decoder_result_queue.h"
 #include "http_decoder_half.h"
-#include "http_decoder_table.h"
 #include "http_decoder_result_queue.h"
 #include "http_decoder_utils.h"
 #include "http_decoder_stat.h"
-#include "http_decoder_tunnel.h"
 #include "fieldstat/fieldstat_easy.h"
 #include "toml/toml.h"
 
@@ -55,6 +53,10 @@ typedef struct iovec hstring;
 #define HD_FREE(pool, p) FREE(p)
 #endif
 
+#ifndef UNUSED
+#define UNUSED __attribute__((unused)) 
+#endif
+
 #define HTTP_IDENTIFY_LEN 16
 #define HD_RESULT_QUEUE_LEN 16
 
@@ -73,7 +75,6 @@ typedef struct iovec hstring;
         int decompress_switch;
         int stat_interval_pkts; // call fieldstat_incrby every stat_interval_pkts
         int stat_output_interval;
-        int proxy_enable;
         size_t result_queue_len; // per session result queue length
         size_t mempool_size;     // per session mempool size
     };
@@ -108,12 +109,13 @@ typedef struct iovec hstring;
 
     struct http_decoder_exdata
     {
+        struct http_decoder_env *httpd_env;
+        struct session *sess;
         int sub_topic_id; // tcp_stream
         int pub_topic_id; // http message or http tunnel msg
         struct http_decoder_result_queue *queue;
         struct http_decoder *decoder;
         nmx_pool_t *mempool;
-        enum http_tunnel_state tunnel_state;
         int in_tunnel_is_http;
     };
 
diff --git a/decoders/http/http_decoder_result_queue.c b/decoders/http/http_decoder_result_queue.c
index 5695138..72eb20b 100644
--- a/decoders/http/http_decoder_result_queue.c
+++ b/decoders/http/http_decoder_result_queue.c
@@ -1,8 +1,7 @@
 #include <assert.h>
 #include "http_decoder_private.h"
 
-struct http_decoder_result_queue *
-http_decoder_result_queue_new(nmx_pool_t *mempool, size_t queue_size)
+struct http_decoder_result_queue *http_decoder_result_queue_new(nmx_pool_t *mempool, size_t queue_size)
 {
     struct http_decoder_result_queue *queue =
         MEMPOOL_CALLOC(mempool, struct http_decoder_result_queue, 1);
@@ -11,8 +10,7 @@ http_decoder_result_queue_new(nmx_pool_t *mempool, size_t queue_size)
     queue->req_index = 0;
     queue->res_index = 0;
     queue->queue_size = queue_size;
-    queue->array = MEMPOOL_CALLOC(mempool, struct http_decoder_result,
-                                  queue->queue_size);
+    queue->array = MEMPOOL_CALLOC(mempool, struct http_decoder_result, queue->queue_size);
     assert(queue->array);
     return queue;
 }
@@ -104,8 +102,7 @@ int http_decoder_result_queue_push_res(struct http_decoder_result_queue *queue,
     return 0;
 }
 
-struct http_decoder_half_data *
-http_decoder_result_queue_pop_req(struct http_decoder_result_queue *queue)
+struct http_decoder_half_data *http_decoder_result_queue_pop_req(struct http_decoder_result_queue *queue)
 {
     if (NULL == queue)
     {
@@ -116,8 +113,7 @@ http_decoder_result_queue_pop_req(struct http_decoder_result_queue *queue)
     return req_data;
 }
 
-struct http_decoder_half_data *
-http_decoder_result_queue_pop_res(struct http_decoder_result_queue *queue)
+struct http_decoder_half_data *http_decoder_result_queue_pop_res(struct http_decoder_result_queue *queue)
 {
     if (NULL == queue)
     {
@@ -129,8 +125,7 @@ http_decoder_result_queue_pop_res(struct http_decoder_result_queue *queue)
     return res_data;
 }
 
-struct http_decoder_half_data *
-http_decoder_result_queue_peek_req(struct http_decoder_result_queue *queue)
+struct http_decoder_half_data *http_decoder_result_queue_peek_req(struct http_decoder_result_queue *queue)
 {
     if (NULL == queue)
     {
@@ -140,8 +135,7 @@ http_decoder_result_queue_peek_req(struct http_decoder_result_queue *queue)
     return queue->array[queue->req_index].req_data;
 }
 
-struct http_decoder_half_data *
-http_decoder_result_queue_peek_res(struct http_decoder_result_queue *queue)
+struct http_decoder_half_data *http_decoder_result_queue_peek_res(struct http_decoder_result_queue *queue)
 {
     if (NULL == queue)
     {
diff --git a/decoders/http/http_decoder_string.c b/decoders/http/http_decoder_string.c
deleted file mode 100644
index 6fd5b04..0000000
--- a/decoders/http/http_decoder_string.c
+++ /dev/null
@@ -1,289 +0,0 @@
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <assert.h>
-#include "http_decoder_private.h"
-
-static const char *string_state_to_desc(enum string_state state)
-{
-    switch (state)
-    {
-    case STRING_STATE_INIT:
-        return "init";
-        break;
-    case STRING_STATE_REFER:
-        return "refer";
-        break;
-    case STRING_STATE_CACHE:
-        return "cache";
-        break;
-    case STRING_STATE_COMMIT:
-        return "commit";
-        break;
-    default:
-        return "unknown";
-        break;
-    }
-}
-
-void http_decoder_string_refer(struct http_decoder_string *rstr, const char *at, size_t length)
-{
-    if (NULL == rstr)
-    {
-        return;
-    }
-
-    switch (rstr->state)
-    {
-    case STRING_STATE_INIT:
-    case STRING_STATE_CACHE:
-        rstr->refer.iov_base = (char *)at;
-        rstr->refer.iov_len = length;
-        break;
-    default:
-        abort();
-        break;
-    }
-
-    rstr->state = STRING_STATE_REFER;
-}
-
-static void string_refer2cache(struct http_decoder_string *rstr)
-{
-    if (0 == rstr->refer.iov_len)
-    {
-        return;
-    }
-    if (rstr->cache.iov_len >= rstr->max_cache_size)
-    {
-        return;
-    }
-
-    size_t length = rstr->cache.iov_len + rstr->refer.iov_len;
-    if (length > rstr->max_cache_size)
-    {
-        length = rstr->max_cache_size;
-    }
-
-    if (NULL == rstr->cache.iov_base)
-    {
-        rstr->cache.iov_base = CALLOC(char, length + 1);
-        memcpy(rstr->cache.iov_base, rstr->refer.iov_base, length);
-    }
-    else
-    {
-        rstr->cache.iov_base = REALLOC(char, rstr->cache.iov_base, length + 1);
-        memcpy((char *)rstr->cache.iov_base + rstr->cache.iov_len, rstr->refer.iov_base,
-               (length - rstr->cache.iov_len));
-    }
-
-    rstr->cache.iov_len = length;
-    rstr->refer.iov_base = NULL;
-    rstr->refer.iov_len = 0;
-}
-
-static void string_commit2cache(struct http_decoder_string *rstr)
-{
-    if (rstr->cache.iov_len == rstr->commit.iov_len &&
-        rstr->cache.iov_base == rstr->commit.iov_base)
-    {
-        rstr->commit.iov_base = NULL;
-        rstr->commit.iov_len = 0;
-        return;
-    }
-
-    // Only http header key need to backward to cache
-    size_t length = 0;
-    if (rstr->commit.iov_len > rstr->max_cache_size)
-    {
-        length = rstr->max_cache_size;
-    }
-    else
-    {
-        length = rstr->commit.iov_len;
-    }
-
-    if (length > 0)
-    {
-        if (NULL == rstr->cache.iov_base)
-        {
-            rstr->cache.iov_base = CALLOC(char, length + 1);
-        }
-        else
-        {
-            abort();
-        }
-        memcpy(rstr->cache.iov_base, rstr->commit.iov_base, length);
-        rstr->cache.iov_len = length;
-
-        rstr->commit.iov_base = NULL;
-        rstr->commit.iov_len = 0;
-    }
-}
-
-void http_decoder_string_cache(struct http_decoder_string *rstr)
-{
-    if (NULL == rstr)
-    {
-        return;
-    }
-
-    switch (rstr->state)
-    {
-    case STRING_STATE_REFER:
-        string_refer2cache(rstr);
-        break;
-    case STRING_STATE_CACHE:
-        break;
-    case STRING_STATE_COMMIT:
-        // commit backward to cache
-        string_commit2cache(rstr);
-        break;
-    default:
-        abort();
-        break;
-    }
-    rstr->state = STRING_STATE_CACHE;
-}
-
-void http_decoder_string_commit(struct http_decoder_string *rstr)
-{
-    if (NULL == rstr)
-    {
-        return;
-    }
-
-    switch (rstr->state)
-    {
-    case STRING_STATE_REFER:
-        if (rstr->cache.iov_len)
-        {
-            http_decoder_string_cache(rstr);
-
-            rstr->commit.iov_base = rstr->cache.iov_base;
-            rstr->commit.iov_len = rstr->cache.iov_len;
-            // not overwrite rstr->cache.iov_base
-        }
-        else
-        {
-            rstr->commit.iov_base = rstr->refer.iov_base;
-            rstr->commit.iov_len = rstr->refer.iov_len;
-
-            rstr->refer.iov_base = NULL;
-            rstr->refer.iov_len = 0;
-        }
-        break;
-    case STRING_STATE_CACHE:
-        rstr->commit.iov_base = rstr->cache.iov_base;
-        rstr->commit.iov_len = rstr->cache.iov_len;
-        // not overwrite rstr->cache.iov_base
-        break;
-    default:
-        // abort();
-        break;
-    }
-
-    rstr->state = STRING_STATE_COMMIT;
-}
-
-void http_decoder_string_reset(struct http_decoder_string *rstr)
-{
-    assert(rstr);
-
-    switch (rstr->state)
-    {
-    case STRING_STATE_INIT:
-    case STRING_STATE_REFER:
-    case STRING_STATE_CACHE:
-    case STRING_STATE_COMMIT:
-        FREE(rstr->cache.iov_base);
-        memset(rstr, 0, sizeof(struct http_decoder_string));
-        break;
-    default:
-        abort();
-        break;
-    }
-
-    rstr->state = STRING_STATE_INIT;
-}
-
-void http_decoder_string_init(struct http_decoder_string *rstr, size_t max_cache_size)
-{
-    rstr->max_cache_size = max_cache_size;
-}
-
-void http_decoder_string_reinit(struct http_decoder_string *rstr)
-{
-    if (rstr->state == STRING_STATE_CACHE)
-    {
-        return;
-    }
-
-    if (rstr->state == STRING_STATE_COMMIT &&
-        rstr->cache.iov_base == rstr->commit.iov_base &&
-        rstr->cache.iov_len == rstr->commit.iov_len)
-    {
-        return;
-    }
-
-    if (rstr->cache.iov_base != NULL)
-    {
-        FREE(rstr->cache.iov_base);
-        rstr->cache.iov_len = 0;
-    }
-
-#if 0
-    rstr->refer.iov_base = NULL;
-    rstr->refer.iov_len = 0;
-    rstr->commit.iov_base = NULL;
-    rstr->commit.iov_len = 0;
-    rstr->state = STRING_STATE_INIT;
-#endif
-}
-
-enum string_state http_decoder_string_state(const struct http_decoder_string *rstr)
-{
-    return rstr->state;
-}
-
-int http_decoder_string_get(const struct http_decoder_string *rstr, char **name, size_t *name_len)
-{
-    if (NULL == rstr || NULL == name || 0 == name_len)
-    {
-        return -1;
-    }
-
-    if (http_decoder_string_state(rstr) == STRING_STATE_COMMIT)
-    {
-        *name = rstr->commit.iov_base;
-        *name_len = rstr->commit.iov_len;
-    }
-    else
-    {
-        *name = NULL;
-        *name_len = 0;
-    }
-    return 0;
-}
-
-void http_decoder_string_dump(struct http_decoder_string *rstr, const char *desc)
-{
-    if (NULL == rstr)
-    {
-        return;
-    }
-
-    char *refer_str = http_safe_dup((char *)rstr->refer.iov_base, rstr->refer.iov_len);
-    char *cache_str = http_safe_dup((char *)rstr->cache.iov_base, rstr->cache.iov_len);
-    char *commit_str = http_safe_dup((char *)rstr->commit.iov_base, rstr->commit.iov_len);
-
-    printf("%s: state: %s, refer: {len: %02zu, iov_base: %s}, cache: {len: %02zu, iov_base: %s}, commit: {len: %02zu, iov_base: %s}\n",
-           desc, string_state_to_desc(rstr->state),
-           rstr->refer.iov_len, refer_str,
-           rstr->cache.iov_len, cache_str,
-           rstr->commit.iov_len, commit_str);
-
-    FREE(refer_str);
-    FREE(cache_str);
-    FREE(commit_str);
-}
\ No newline at end of file
diff --git a/decoders/http/http_decoder_string.h b/decoders/http/http_decoder_string.h
deleted file mode 100644
index 83721e9..0000000
--- a/decoders/http/http_decoder_string.h
+++ /dev/null
@@ -1,73 +0,0 @@
-#pragma once
-
-#include "stellar/http.h"
-
-enum string_state {
-    STRING_STATE_INIT,
-    STRING_STATE_REFER,
-    STRING_STATE_CACHE,
-    STRING_STATE_COMMIT,
-};
-
-/* state transition diagram
- *       +----------+
- *       |          |
- *      \|/         |
- *    +------+      |
- *    | init |      |
- *    +------+      |
- *       |          |
- * +---->|          |
- * |    \|/         |
- * |  +-------+     |
- * |  | refer |--+  |
- * |  +-------+  |  |
- * |     |       |  |
- * |    \|/      |  |
- * |  +-------+  |  |
- * +--| cache |  |  |
- *    +-------+  |  |
- *       |       |  |
- *       |<------+  |
- *      \|/         |
- *    +--------+    |
- *    | commit |    |
- *    +--------+    |
- *       |          |
- *      \|/         |
- *    +--------+    |
- *    | reset  |----+
- *    +--------+
- */
-
-
-//http decoder string
-struct http_decoder_string {
-    hstring refer; // shallow copy
-    hstring cache; // deep copy
-    hstring commit;
-
-    enum string_state state;
-    size_t max_cache_size;
-};
-
-void http_decoder_string_refer(struct http_decoder_string *rstr,
-                               const char *at, size_t length);
-
-void http_decoder_string_cache(struct http_decoder_string *rstr);
-
-void http_decoder_string_commit(struct http_decoder_string *rstr);
-
-void http_decoder_string_reset(struct http_decoder_string *rstr);
-
-void http_decoder_string_init(struct http_decoder_string *rstr,
-                              size_t max_cache_size);
-
-void http_decoder_string_reinit(struct http_decoder_string *rstr);
-
-enum string_state http_decoder_string_state(const struct http_decoder_string *rstr);
-
-int http_decoder_string_get(const struct http_decoder_string *rstr, char **name, size_t *name_len);
-
-void http_decoder_string_dump(struct http_decoder_string *rstr, const char *desc);
- 
\ No newline at end of file
diff --git a/decoders/http/http_decoder_table.c b/decoders/http/http_decoder_table.c
deleted file mode 100644
index c85b876..0000000
--- a/decoders/http/http_decoder_table.c
+++ /dev/null
@@ -1,579 +0,0 @@
-#include <assert.h>
-#include <stdlib.h>
-#include <string.h>
-#include "http_decoder_private.h"
-
-#define INIT_HEADER_CNT 16
-#define MAX_URI_CACHE_SIZE 2048
-#define MAX_STATUS_CACHE_SIZE 32
-#define MAX_METHOD_CACHE_SIZE 8
-#define MAX_VERSION_CACHE_SIZE 4
-#define MAX_HEADER_KEY_CACHE_SIZE 4096
-#define MAX_HEADER_VALUE_CACHE_SIZE 4096
-
-struct http_decoder_header
-{
-    struct http_decoder_string key;
-    struct http_decoder_string val;
-};
-
-struct http_decoder_table
-{
-    struct http_decoder_string uri;
-    struct http_decoder_string status;
-    struct http_decoder_string method;
-    struct http_decoder_string version;
-    struct http_decoder_string body;
-
-    nmx_pool_t *ref_mempool;
-    int header_complete; // flag for all headers parsed completely
-    size_t header_cnt;
-    size_t header_index;        // current parsing header
-    size_t header_iter;         // plugins iterate cursor
-    size_t commit_header_index; // pushed to plugins, whether has called http_message_get0_next_header()
-    struct http_decoder_header *headers;
-};
-
-static void http_decoder_table_init(struct http_decoder_table *table)
-{
-    if (NULL == table)
-    {
-        return;
-    }
-
-    struct http_decoder_header *header = NULL;
-    assert(table);
-
-    http_decoder_string_init(&table->uri, MAX_URI_CACHE_SIZE);
-    http_decoder_string_init(&table->status, MAX_STATUS_CACHE_SIZE);
-    http_decoder_string_init(&table->method, MAX_METHOD_CACHE_SIZE);
-    http_decoder_string_init(&table->version, MAX_METHOD_CACHE_SIZE);
-
-    for (size_t i = 0; i < table->header_cnt; i++)
-    {
-        header = &table->headers[i];
-        http_decoder_string_init(&header->key, MAX_HEADER_KEY_CACHE_SIZE);
-        http_decoder_string_init(&header->val, MAX_HEADER_VALUE_CACHE_SIZE);
-    }
-
-    http_decoder_string_init(&table->body, 0);
-}
-
-struct http_decoder_table *http_decoder_table_new(nmx_pool_t *mempool)
-{
-    struct http_decoder_table *table =
-        MEMPOOL_CALLOC(mempool, struct http_decoder_table, 1);
-    assert(table);
-
-    table->ref_mempool = mempool;
-    table->header_cnt = INIT_HEADER_CNT;
-    table->headers = MEMPOOL_CALLOC(mempool, struct http_decoder_header,
-                                    table->header_cnt);
-    table->commit_header_index = 0;
-    http_decoder_table_init(table);
-
-    return table;
-}
-
-void http_decoder_table_free(struct http_decoder_table *table)
-{
-    if (NULL == table)
-    {
-        return;
-    }
-    if (table->uri.cache.iov_base != NULL)
-    {
-        FREE(table->uri.cache.iov_base);
-    }
-    if (table->status.cache.iov_base != NULL)
-    {
-        FREE(table->status.cache.iov_base);
-    }
-    if (table->method.cache.iov_base != NULL)
-    {
-        FREE(table->method.cache.iov_base);
-    }
-    if (table->version.cache.iov_base != NULL)
-    {
-        FREE(table->version.cache.iov_base);
-    }
-    if (table->body.cache.iov_base != NULL)
-    {
-        FREE(table->body.cache.iov_base);
-    }
-
-    if (table->headers != NULL)
-    {
-        for (size_t i = 0; i < table->header_cnt; i++)
-        {
-            if (table->headers[i].key.cache.iov_base != NULL)
-            {
-                FREE(table->headers[i].key.cache.iov_base);
-            }
-
-            if (table->headers[i].val.cache.iov_base != NULL)
-            {
-                FREE(table->headers[i].val.cache.iov_base);
-            }
-        }
-
-        MEMPOOL_FREE(table->ref_mempool, table->headers);
-        table->headers = NULL;
-    }
-    MEMPOOL_FREE(table->ref_mempool, table);
-}
-
-enum string_state http_decoder_table_state(struct http_decoder_table *table, enum http_item type)
-{
-    if (NULL == table)
-    {
-        return STRING_STATE_INIT;
-    }
-    struct http_decoder_header *header = NULL;
-    enum string_state state = STRING_STATE_INIT;
-    assert(table);
-
-    switch (type)
-    {
-    case HTTP_ITEM_URI:
-        state = http_decoder_string_state(&table->uri);
-        break;
-    case HTTP_ITEM_STATUS:
-        state = http_decoder_string_state(&table->status);
-        break;
-    case HTTP_ITEM_METHOD:
-        state = http_decoder_string_state(&table->method);
-        break;
-    case HTTP_ITEM_VERSION:
-        state = http_decoder_string_state(&table->version);
-        break;
-    case HTTP_ITEM_HDRKEY:
-        assert(table->header_index < table->header_cnt);
-        header = &table->headers[table->header_index];
-        state = http_decoder_string_state(&header->key);
-        break;
-    case HTTP_ITEM_HDRVAL:
-        assert(table->header_index < table->header_cnt);
-        header = &table->headers[table->header_index];
-        state = http_decoder_string_state(&header->val);
-        break;
-    case HTTP_ITEM_BODY:
-        state = http_decoder_string_state(&table->body);
-        break;
-    default:
-        abort();
-        break;
-    }
-
-    return state;
-}
-
-void http_decoder_table_refer(struct http_decoder_table *table, enum http_item type, const char *at, size_t len)
-{
-    if (NULL == table)
-    {
-        return;
-    }
-
-    struct http_decoder_header *header = NULL;
-    assert(table);
-
-    switch (type)
-    {
-    case HTTP_ITEM_URI:
-        http_decoder_string_refer(&table->uri, at, len);
-        break;
-    case HTTP_ITEM_STATUS:
-        http_decoder_string_refer(&table->status, at, len);
-        break;
-    case HTTP_ITEM_METHOD:
-        http_decoder_string_refer(&table->method, at, len);
-        break;
-    case HTTP_ITEM_VERSION:
-        http_decoder_string_refer(&table->version, at, len);
-        break;
-    case HTTP_ITEM_HDRKEY:
-        assert(table->header_index < table->header_cnt);
-        header = &table->headers[table->header_index];
-        http_decoder_string_refer(&header->key, at, len);
-        break;
-    case HTTP_ITEM_HDRVAL:
-        assert(table->header_index < table->header_cnt);
-        header = &table->headers[table->header_index];
-        http_decoder_string_refer(&header->val, at, len);
-        break;
-    case HTTP_ITEM_BODY:
-        http_decoder_string_refer(&table->body, at, len);
-        break;
-    default:
-        abort();
-        break;
-    }
-}
-
-void http_decoder_table_cache(struct http_decoder_table *table, enum http_item type)
-{
-    if (NULL == table)
-    {
-        return;
-    }
-
-    struct http_decoder_header *header = NULL;
-    assert(table);
-
-    switch (type)
-    {
-    case HTTP_ITEM_URI:
-        http_decoder_string_cache(&table->uri);
-        break;
-    case HTTP_ITEM_STATUS:
-        http_decoder_string_cache(&table->status);
-        break;
-    case HTTP_ITEM_METHOD:
-        http_decoder_string_cache(&table->method);
-        break;
-    case HTTP_ITEM_VERSION:
-        http_decoder_string_cache(&table->version);
-        break;
-    case HTTP_ITEM_HDRKEY:
-        assert(table->header_index < table->header_cnt);
-        header = &table->headers[table->header_index];
-        http_decoder_string_cache(&header->key);
-        break;
-    case HTTP_ITEM_HDRVAL:
-        assert(table->header_index < table->header_cnt);
-        header = &table->headers[table->header_index];
-        http_decoder_string_cache(&header->val);
-        break;
-    case HTTP_ITEM_BODY:
-        http_decoder_string_cache(&table->body);
-        break;
-    default:
-        abort();
-        break;
-    }
-}
-
-void http_decoder_table_commit(struct http_decoder_table *table, enum http_item type)
-{
-    if (NULL == table)
-    {
-        return;
-    }
-
-    size_t i = 0;
-    struct http_decoder_header *header = NULL;
-    assert(table);
-
-    switch (type)
-    {
-    case HTTP_ITEM_URI:
-        http_decoder_string_commit(&table->uri);
-        break;
-    case HTTP_ITEM_STATUS:
-        http_decoder_string_commit(&table->status);
-        break;
-    case HTTP_ITEM_METHOD:
-        http_decoder_string_commit(&table->method);
-        break;
-    case HTTP_ITEM_VERSION:
-        http_decoder_string_commit(&table->version);
-        break;
-    case HTTP_ITEM_HDRKEY:
-        assert(table->header_index < table->header_cnt);
-        header = &table->headers[table->header_index];
-        http_decoder_string_commit(&header->key);
-        break;
-    case HTTP_ITEM_HDRVAL:
-        header = &table->headers[table->header_index];
-        http_decoder_string_commit(&header->val);
-        // inc index
-        if ((table->header_index + 1) >= table->header_cnt)
-        {
-            struct http_decoder_header *old_headers = table->headers;
-            table->headers =
-                MEMPOOL_CALLOC(table->ref_mempool, struct http_decoder_header,
-                               table->header_cnt * 2);
-            table->header_cnt *= 2;
-
-            for (i = 0; i <= table->header_index; i++)
-            {
-                table->headers[i] = old_headers[i];
-            }
-
-            MEMPOOL_FREE(table->ref_mempool, old_headers);
-
-            for (i = table->header_index + 1; i < table->header_cnt; i++)
-            {
-                header = &table->headers[i];
-                memset(header, 0, sizeof(struct http_decoder_header));
-                http_decoder_string_init(&header->key, MAX_HEADER_KEY_CACHE_SIZE);
-                http_decoder_string_init(&header->val, MAX_HEADER_VALUE_CACHE_SIZE);
-            }
-        }
-        table->header_index++;
-        break;
-    case HTTP_ITEM_BODY:
-        http_decoder_string_commit(&table->body);
-        break;
-    default:
-        abort();
-        break;
-    }
-}
-
-void http_decoder_table_reset(struct http_decoder_table *table, enum http_item type)
-{
-    if (NULL == table)
-    {
-        return;
-    }
-
-    struct http_decoder_header *header = NULL;
-    assert(table);
-
-    switch (type)
-    {
-    case HTTP_ITEM_URI:
-        http_decoder_string_reset(&table->uri);
-        break;
-    case HTTP_ITEM_STATUS:
-        http_decoder_string_reset(&table->status);
-        break;
-    case HTTP_ITEM_METHOD:
-        http_decoder_string_reset(&table->method);
-        break;
-    case HTTP_ITEM_VERSION:
-        http_decoder_string_reset(&table->version);
-        break;
-    case HTTP_ITEM_HDRKEY:
-        header = &table->headers[table->header_index];
-        http_decoder_string_reset(&header->key);
-        break;
-    case HTTP_ITEM_HDRVAL:
-        header = &table->headers[table->header_index];
-        http_decoder_string_reset(&header->val);
-        break;
-    case HTTP_ITEM_BODY:
-        http_decoder_string_reset(&table->body);
-        break;
-    default:
-        abort();
-        break;
-    }
-}
-
-void http_decoder_table_reinit(struct http_decoder_table *table)
-{
-    assert(table);
-    struct http_decoder_header *header = NULL;
-
-    http_decoder_string_reinit(&table->uri);
-    http_decoder_string_reinit(&table->status);
-    http_decoder_string_reinit(&table->method);
-    http_decoder_string_reinit(&table->version);
-    // for (size_t i = 0; i < table->header_iter; i++) {
-    for (size_t i = 0; i < table->commit_header_index; i++)
-    {
-        // todo, reset header_index, avoid realloc headers as much as possible
-        header = &table->headers[i];
-        http_decoder_string_reinit(&header->key);
-        http_decoder_string_reinit(&header->val);
-    }
-
-    http_decoder_string_reinit(&table->body);
-}
-
-void http_decoder_table_dump(struct http_decoder_table *table)
-{
-    if (NULL == table)
-    {
-        return;
-    }
-
-    http_decoder_string_dump(&table->uri, "uri");
-    http_decoder_string_dump(&table->status, "status");
-    http_decoder_string_dump(&table->method, "method");
-    http_decoder_string_dump(&table->version, "version");
-    http_decoder_string_dump(&table->body, "body");
-
-    for (size_t i = 0; i < table->header_cnt; i++)
-    {
-        struct http_decoder_header *header = &table->headers[i];
-        if (NULL == header)
-        {
-            continue;
-        }
-
-        http_decoder_string_dump(&header->key, "key");
-        http_decoder_string_dump(&header->val, "val");
-    }
-}
-
-int http_decoder_table_get_uri(const struct http_decoder_table *table, char **out, size_t *out_len)
-{
-    if (NULL == table || NULL == out)
-    {
-        return -1;
-    }
-    return http_decoder_string_get(&table->uri, out, out_len);
-}
-
-int http_decoder_table_get_method(const struct http_decoder_table *table, char **out, size_t *out_len)
-{
-    if (NULL == table || NULL == out)
-    {
-        return -1;
-    }
-    return http_decoder_string_get(&table->method, out, out_len);
-}
-
-int http_decoder_table_get_status(const struct http_decoder_table *table, char **out, size_t *out_len)
-{
-    if (NULL == table || NULL == out)
-    {
-        return -1;
-    }
-    return http_decoder_string_get(&table->status, out, out_len);
-}
-
-int http_decoder_table_get_version(const struct http_decoder_table *table, char **out, size_t *out_len)
-{
-    if (NULL == table || NULL == out)
-    {
-        return -1;
-    }
-    return http_decoder_string_get(&table->version, out, out_len);
-}
-
-int http_decoder_table_get_body(const struct http_decoder_table *table, char **out, size_t *out_len)
-{
-    if (NULL == table || NULL == out)
-    {
-        return -1;
-    }
-    return http_decoder_string_get(&table->body, (char **)out, out_len);
-}
-
-int http_decoder_table_get_header(const struct http_decoder_table *table, const char *name, size_t name_len,
-                                  struct http_header_field *hdr_result)
-{
-    for (size_t i = 0; i < table->header_cnt; i++)
-    {
-        const struct http_decoder_header *tmp_header = &table->headers[i];
-        if (tmp_header->key.commit.iov_len != name_len)
-        {
-            continue;
-        }
-
-        if (http_decoder_string_state(&tmp_header->key) == STRING_STATE_COMMIT &&
-            http_decoder_string_state(&tmp_header->val) == STRING_STATE_COMMIT)
-        {
-            hstring tmp_key;
-            http_decoder_string_get(&tmp_header->key, (char **)&tmp_key.iov_base, &tmp_key.iov_len);
-
-            if (tmp_key.iov_len == name_len &&
-                (0 == strncasecmp((char *)tmp_key.iov_base, name, name_len)))
-            {
-                http_decoder_string_get(&tmp_header->key, &hdr_result->name, &hdr_result->name_len);
-                http_decoder_string_get(&tmp_header->val, &hdr_result->value, &hdr_result->value_len);
-                return 0;
-            }
-        }
-    }
-    return -1;
-}
-
-int http_decoder_table_iter_header(struct http_decoder_table *table, struct http_header_field *hdr)
-{
-    if (NULL == table || NULL == hdr)
-    {
-        return -1;
-    }
-    if (table->header_iter >= table->header_cnt)
-    {
-        return -1;
-    }
-
-    struct http_decoder_header *tmp_header = &table->headers[table->header_iter];
-    if (tmp_header != NULL)
-    {
-        if (http_decoder_string_state(&tmp_header->key) == STRING_STATE_COMMIT &&
-            http_decoder_string_state(&tmp_header->val) == STRING_STATE_COMMIT)
-        {
-
-            http_decoder_string_get(&tmp_header->key, &hdr->name, &hdr->name_len);
-            http_decoder_string_get(&tmp_header->val, &hdr->value, &hdr->value_len);
-            table->header_iter++;
-            return 1;
-        }
-    }
-
-    hdr->name = NULL;
-    hdr->name_len = 0;
-    hdr->value = NULL;
-    hdr->value_len = 0;
-
-    return -1;
-}
-
-int http_decoder_table_reset_header_iter(struct http_decoder_table *table)
-{
-    table->header_iter = 0;
-    return 0;
-}
-
-int http_decoder_table_has_parsed_header(struct http_decoder_table *table)
-{
-    // if (NULL == table || (table->header_iter == table->header_index)) {
-    if (NULL == table || (table->commit_header_index == table->header_index))
-    {
-        return 0;
-    }
-
-    const struct http_decoder_header *tmp_header = &table->headers[table->header_iter];
-
-    if (http_decoder_string_state(&tmp_header->key) == STRING_STATE_COMMIT && http_decoder_string_state(&tmp_header->val) == STRING_STATE_COMMIT)
-    {
-        return 1;
-    }
-
-    return 0;
-}
-
-int http_decoder_table_header_complete(struct http_decoder_table *table)
-{
-    if (NULL == table)
-    {
-        return -1;
-    }
-    return table->header_complete;
-}
-
-void http_decoder_table_set_header_complete(struct http_decoder_table *table)
-{
-    if (NULL == table)
-    {
-        return;
-    }
-    table->header_complete = 1;
-}
-
-void http_decoder_table_reset_header_complete(struct http_decoder_table *table)
-{
-    if (NULL == table)
-    {
-        return;
-    }
-    table->header_complete = 0;
-}
-
-void http_decoder_table_update_commit_index(struct http_decoder_table *table)
-{
-    table->commit_header_index = table->header_index;
-}
-
-int http_decoder_table_get_total_parsed_header(struct http_decoder_table *table)
-{
-    return table->header_index;
-}
\ No newline at end of file
diff --git a/decoders/http/http_decoder_table.h b/decoders/http/http_decoder_table.h
deleted file mode 100644
index 9a8d948..0000000
--- a/decoders/http/http_decoder_table.h
+++ /dev/null
@@ -1,79 +0,0 @@
-#pragma once
-#include <stddef.h>
-#include "stellar/http.h"
-#include "http_decoder_private.h"
-#include "http_decoder_string.h"
-
-enum http_item
-{
-    HTTP_ITEM_URI = 0x01,
-    HTTP_ITEM_STATUS = 0x02,
-    HTTP_ITEM_METHOD = 0x03,
-    HTTP_ITEM_VERSION = 0x04,
-    HTTP_ITEM_HDRKEY = 0x05,
-    HTTP_ITEM_HDRVAL = 0x06,
-    HTTP_ITEM_BODY = 0x07,
-};
-
-struct http_decoder_table;
-struct http_decoder_table *http_decoder_table_new(nmx_pool_t *mempool);
-
-void http_decoder_table_free(struct http_decoder_table *table);
-
-enum string_state
-http_decoder_table_state(struct http_decoder_table *table, enum http_item type);
-
-void http_decoder_table_refer(struct http_decoder_table *table, enum http_item type,
-                              const char *at, size_t len);
-
-void http_decoder_table_cache(struct http_decoder_table *table, enum http_item type);
-
-void http_decoder_table_commit(struct http_decoder_table *table, enum http_item type);
-
-void http_decoder_table_reset(struct http_decoder_table *table, enum http_item type);
-
-void http_decoder_table_reinit(struct http_decoder_table *table);
-
-void http_decoder_table_dump(struct http_decoder_table *table);
-
-int http_decoder_table_get_uri(const struct http_decoder_table *table, char **out, size_t *out_len);
-
-int http_decoder_table_get_method(const struct http_decoder_table *table, char **out, size_t *out_len);
-
-int http_decoder_table_get_status(const struct http_decoder_table *table, char **out, size_t *out_len);
-
-int http_decoder_table_get_version(const struct http_decoder_table *table, char **out, size_t *out_len);
-
-int http_decoder_table_get_body(const struct http_decoder_table *table, char **out, size_t *out_len);
-
-int http_decoder_table_get_header(const struct http_decoder_table *table,
-                                  const char *name, size_t name_len,
-                                  struct http_header_field *hdr_res);
-
-int http_decoder_table_iter_header(struct http_decoder_table *table,
-                                   struct http_header_field *hdr);
-int http_decoder_table_reset_header_iter(struct http_decoder_table *table);
-/**
- * @brief Is there a parsed header
- *
- * @retval yes(1) no(0)
- */
-int http_decoder_table_has_parsed_header(struct http_decoder_table *table);
-
-/**
- * @brief If headers have been parsed completely
- *
- * @retval yes(1) no(0)
- */
-int http_decoder_table_header_complete(struct http_decoder_table *table);
-
-/**
- * @brief set flag for headers parsed completely
- */
-void http_decoder_table_set_header_complete(struct http_decoder_table *table);
-
-void http_decoder_table_reset_header_complete(struct http_decoder_table *table);
-
-void http_decoder_table_update_commit_index(struct http_decoder_table *table);
-
-int http_decoder_table_get_total_parsed_header(struct http_decoder_table *table);
diff --git a/decoders/http/http_decoder_tunnel.c b/decoders/http/http_decoder_tunnel.c
deleted file mode 100644
index a6abda8..0000000
--- a/decoders/http/http_decoder_tunnel.c
+++ /dev/null
@@ -1,116 +0,0 @@
-#include <assert.h>
-#include <stdio.h>
-#include <string.h>
-#include <strings.h>
-#include <unistd.h>
-#include "http_decoder_private.h"
-#include "llhttp.h"
-
-struct http_tunnel_message
-{
-    enum http_tunnel_message_type type;
-    hstring tunnel_payload;
-};
-
-int httpd_tunnel_identify(struct http_decoder_env *httpd_env, int curdir, struct http_decoder_half_data *hfdata)
-{
-    if (0 == httpd_env->hd_cfg.proxy_enable)
-    {
-        return 0;
-    }
-
-    if (FLOW_TYPE_C2S == curdir)
-    {
-        struct http_request_line reqline = {};
-        http_decoder_half_data_get_request_line(hfdata, &reqline);
-        if (0 == http_strncasecmp_safe("CONNECT", (char *)reqline.method,
-                                  7, reqline.method_len))
-        {
-            return 1;
-        }
-    }
-    else
-    {
-        struct http_response_line resline = {};
-        http_decoder_half_data_get_response_line(hfdata, &resline);
-        if (resline.status_code == HTTP_STATUS_OK && 0 == http_strncasecmp_safe("Connection established", (char *)resline.status,
-                                                                           strlen("Connection established"), resline.status_len))
-        {
-            return 1;
-        }
-    }
-
-    return 0;
-}
-
-int httpd_is_tunnel_session(const struct http_decoder_env *httpd_env, const struct http_decoder_exdata *ex_data)
-{
-    if (0 == httpd_env->hd_cfg.proxy_enable)
-    {
-        return 0;
-    }
-    return (ex_data && ex_data->tunnel_state != HTTP_TUN_NON);
-}
-
-int httpd_in_tunnel_transmitting(const struct http_decoder_env *httpd_env, struct http_decoder_exdata *ex_data)
-{
-    if (0 == httpd_env->hd_cfg.proxy_enable)
-    {
-        return 0;
-    }
-    return (ex_data && ex_data->tunnel_state >= HTTP_TUN_INNER_STARTING);
-}
-
-enum http_tunnel_message_type httpd_tunnel_state_to_msg(const struct http_decoder_exdata *ex_data)
-{
-    if (ex_data->tunnel_state == HTTP_TUN_INNER_STARTING)
-    {
-        return HTTP_TUNNEL_OPENING;
-    }
-    if (ex_data->tunnel_state == HTTP_TUN_INNER_TRANS)
-    {
-        return HTTP_TUNNEL_ACTIVE;
-    }
-    return HTTP_TUNNEL_MSG_MAX;
-}
-
-void httpd_tunnel_state_update(struct http_decoder_exdata *ex_data)
-{
-    if (ex_data->tunnel_state == HTTP_TUN_INNER_STARTING)
-    {
-        ex_data->tunnel_state = HTTP_TUN_INNER_TRANS;
-    }
-}
-
-void http_decoder_push_tunnel_data(struct session *sess, const struct http_decoder_exdata *exdata, enum http_tunnel_message_type type, const char *payload, uint16_t payload_len)
-{
-    struct http_tunnel_message *tmsg = (struct http_tunnel_message *)CALLOC(struct http_tunnel_message, 1);
-    tmsg->type = type;
-    tmsg->tunnel_payload.iov_base = (char *)payload;
-    tmsg->tunnel_payload.iov_len = payload_len;
-    session_mq_publish_message(sess, exdata->pub_topic_id, tmsg);
-}
-
-#ifdef __cplusplus
-extern "C"
-{
-#endif
-    void http_tunnel_message_get_payload(const struct http_tunnel_message *tmsg,
-                                         hstring *tunnel_payload)
-    {
-        if (unlikely(NULL == tmsg || tunnel_payload == NULL))
-        {
-            return;
-        }
-        tunnel_payload->iov_base = tmsg->tunnel_payload.iov_base;
-        tunnel_payload->iov_len = tmsg->tunnel_payload.iov_len;
-    }
-
-    enum http_tunnel_message_type http_tunnel_message_type_get(const struct http_tunnel_message *tmsg)
-    {
-        return tmsg->type;
-    }
-
-#ifdef __cplusplus
-}
-#endif
diff --git a/decoders/http/http_decoder_tunnel.h b/decoders/http/http_decoder_tunnel.h
deleted file mode 100644
index 52882e5..0000000
--- a/decoders/http/http_decoder_tunnel.h
+++ /dev/null
@@ -1,36 +0,0 @@
-#pragma once
-#include "http_decoder_private.h"
-#include "http_decoder_half.h"
-
-enum http_tunnel_state
-{
-    HTTP_TUN_NON = 0,        // init, or not tunnel session
-    HTTP_TUN_C2S_HDR_START,  // CONNECT ...
-    HTTP_TUN_C2S_END,        // CONNECT request end
-    HTTP_TUN_S2C_START,      // HTTP 200 connet established
-    HTTP_TUN_INNER_STARTING, // http inner tunnel protocol starting
-    HTTP_TUN_INNER_TRANS,    // http inner tunnel protocol transmitting
-};
-
-/************************************************************
- *       HTTP TUNNEL WITH CONNECT METHOD.
- *************************************************************/
-struct http_tunnel_message;
-#define HTTP_DECODER_TUNNEL_TOPIC "HTTP_DECODER_TUNNEL_MESSAGE"
-
-enum http_tunnel_message_type
-{
-    HTTP_TUNNEL_OPENING,
-    HTTP_TUNNEL_ACTIVE,
-    HTTP_TUNNEL_CLOSING,
-    HTTP_TUNNEL_MSG_MAX
-};
-enum http_tunnel_message_type http_tunnel_message_type_get(const struct http_tunnel_message *tmsg);
-void http_tunnel_message_get_payload(const struct http_tunnel_message *tmsg, struct iovec *tunnel_payload);
-
-int httpd_tunnel_identify(struct http_decoder_env *httpd_env, int curdir, struct http_decoder_half_data *hfdata);
-int httpd_is_tunnel_session(const struct http_decoder_env *httpd_env, const struct http_decoder_exdata *ex_data);
-int httpd_in_tunnel_transmitting(const struct http_decoder_env *httpd_env, struct http_decoder_exdata *ex_data);
-void httpd_tunnel_state_update(struct http_decoder_exdata *ex_data);
-void http_decoder_push_tunnel_data(struct session *sess, const struct http_decoder_exdata *exdata, enum http_tunnel_message_type type, const char *payload, uint16_t payload_len);
-enum http_tunnel_message_type httpd_tunnel_state_to_msg(const struct http_decoder_exdata *ex_data);
\ No newline at end of file
diff --git a/decoders/http/http_decoder_utils.c b/decoders/http/http_decoder_utils.c
index 08c66b0..b121467 100644
--- a/decoders/http/http_decoder_utils.c
+++ b/decoders/http/http_decoder_utils.c
@@ -1,7 +1,9 @@
 #include <string.h>
 #include <assert.h>
+#include <arpa/inet.h>
 #include "stellar/http.h"
 #include "http_decoder_private.h"
+#include "llhttp.h"
 
 char *http_safe_dup(const char *str, size_t len)
 {
@@ -33,14 +35,8 @@ const char *http_message_type_to_string(enum http_message_type type)
 
     switch (type)
     {
-    case HTTP_MESSAGE_REQ_LINE:
-        sname = "HTTP_MESSAGE_REQ_LINE";
-        break;
-    case HTTP_MESSAGE_REQ_HEADER:
-        sname = "HTTP_MESSAGE_REQ_HEADER";
-        break;
-    case HTTP_MESSAGE_REQ_HEADER_END:
-        sname = "HTTP_MESSAGE_REQ_HEADER_END";
+    case HTTP_MESSAGE_REQ_LINE_HEADERS:
+        sname = "HTTP_MESSAGE_REQ_LINE_HEADERS";
         break;
     case HTTP_MESSAGE_REQ_BODY_START:
         sname = "HTTP_MESSAGE_REQ_BODY_START";
@@ -51,14 +47,8 @@ const char *http_message_type_to_string(enum http_message_type type)
     case HTTP_MESSAGE_REQ_BODY_END:
         sname = "HTTP_MESSAGE_REQ_BODY_END";
         break;
-    case HTTP_MESSAGE_RES_LINE:
-        sname = "HTTP_MESSAGE_RES_LINE";
-        break;
-    case HTTP_MESSAGE_RES_HEADER:
-        sname = "HTTP_MESSAGE_RES_HEADER";
-        break;
-    case HTTP_MESSAGE_RES_HEADER_END:
-        sname = "HTTP_MESSAGE_RES_HEADER_END";
+    case HTTP_MESSAGE_RES_LINE_HEADERS:
+        sname = "HTTP_MESSAGE_RES_LINE_HEADERS";
         break;
     case HTTP_MESSAGE_RES_BODY_START:
         sname = "HTTP_MESSAGE_RES_BODY_START";
@@ -89,18 +79,14 @@ int http_message_type_is_req(struct session *sess, enum http_message_type msg_ty
 
     switch (msg_type)
     {
-    case HTTP_MESSAGE_REQ_LINE:
-    case HTTP_MESSAGE_REQ_HEADER:
-    case HTTP_MESSAGE_REQ_HEADER_END:
+    case HTTP_MESSAGE_REQ_LINE_HEADERS:
     case HTTP_MESSAGE_REQ_BODY_START:
     case HTTP_MESSAGE_REQ_BODY:
     case HTTP_MESSAGE_REQ_BODY_END:
         is_req_msg = 1;
         break;
 
-    case HTTP_MESSAGE_RES_LINE:
-    case HTTP_MESSAGE_RES_HEADER:
-    case HTTP_MESSAGE_RES_HEADER_END:
+    case HTTP_MESSAGE_RES_LINE_HEADERS:
     case HTTP_MESSAGE_RES_BODY_START:
     case HTTP_MESSAGE_RES_BODY:
     case HTTP_MESSAGE_RES_BODY_END:
@@ -308,4 +294,203 @@ void httpd_session_get_addr(const struct session *sess, struct httpd_session_add
             break;
         }
     }
+}
+
+void http_session_addr_ntop(const struct httpd_session_addr *sesaddr, char *buf, size_t buflen)
+{
+    char sip_str[INET6_ADDRSTRLEN] = {0};
+    char dip_str[INET6_ADDRSTRLEN] = {0};
+    uint16_t sport_host, dport_host;
+    if (sesaddr->ipver == 4)
+    {
+        inet_ntop(AF_INET, &sesaddr->saddr4, sip_str, sizeof(sip_str));
+        inet_ntop(AF_INET, &sesaddr->daddr4, dip_str, sizeof(dip_str));
+    }
+    else if (sesaddr->ipver == 6)
+    {
+        inet_ntop(AF_INET6, &sesaddr->saddr6, sip_str, sizeof(sip_str));
+        inet_ntop(AF_INET6, &sesaddr->daddr6, dip_str, sizeof(dip_str));
+    }
+    sport_host = ntohs(sesaddr->sport);
+    dport_host = ntohs(sesaddr->dport);
+    snprintf(buf, buflen, "%s:%u-%s:%u", sip_str, sport_host, dip_str, dport_host);
+}
+
+struct http_buffer *http_buffer_new(void)
+{
+    struct http_buffer *buffer = CALLOC(struct http_buffer, 1);
+    buffer->buffer = NULL;
+    buffer->buffer_size = 0;
+    return buffer;
+}
+
+void http_buffer_free(struct http_buffer *buffer)
+{
+    if (NULL == buffer)
+    {
+        return;
+    }
+    FREE(buffer->buffer);
+    FREE(buffer);
+}
+
+int http_buffer_add(struct http_buffer *buffer, const char *data, size_t data_len)
+{
+    if (NULL == buffer || NULL == data || 0 == data_len)
+    {
+        return -1;
+    }
+    buffer->buffer = REALLOC(char, buffer->buffer, buffer->buffer_size + data_len);
+    memcpy(buffer->buffer + buffer->buffer_size, data, data_len);
+    buffer->buffer_size += data_len;
+    return 0;
+}
+
+int http_buffer_read(struct http_buffer *buffer, char **data, size_t *data_len)
+{
+    if (NULL == buffer)
+    {
+        if (data)
+        {
+            *data = NULL;
+        }
+        if (data_len)
+        {
+            *data_len = 0;
+        }
+        return -1;
+    }
+    *data = buffer->buffer;
+    *data_len = buffer->buffer_size;
+    return 0;
+}
+
+char *http_string_dup(const char *str, size_t len)
+{
+    if (NULL == str || 0 == len)
+    {
+        return NULL;
+    }
+    char *new_str = ALLOC(char, len);
+    memcpy(new_str, str, len);
+    return new_str;
+}
+
+enum http_method_type http_get_method(const char *method, size_t method_len)
+{
+    enum http_method_type type = HTTP_METHOD_UNKNOWN;
+
+    if (NULL == method || 0 == method_len)
+    {
+        return type;
+    }
+
+    if (http_strncasecmp_safe(method, "GET", method_len, 3) == 0)
+    {
+        type = HTTP_METHOD_GET;
+    }
+    else if (http_strncasecmp_safe(method, "POST", method_len, 4) == 0)
+    {
+        type = HTTP_METHOD_POST;
+    }
+    else if (http_strncasecmp_safe(method, "HEAD", method_len, 4) == 0)
+    {
+        type = HTTP_METHOD_HEAD;
+    }
+    else if (http_strncasecmp_safe(method, "PUT", method_len, 3) == 0)
+    {
+        type = HTTP_METHOD_PUT;
+    }
+    else if (http_strncasecmp_safe(method, "DELETE", method_len, 6) == 0)
+    {
+        type = HTTP_METHOD_DELETE;
+    }
+    else if (http_strncasecmp_safe(method, "CONNECT", method_len, 7) == 0)
+    {
+        type = HTTP_METHOD_CONNECT;
+    }
+    else if (http_strncasecmp_safe(method, "OPTIONS", method_len, 7) == 0)
+    {
+        type = HTTP_METHOD_OPTIONS;
+    }
+
+    return type;
+}
+
+long long http_strtoll(const char *str, size_t strlen)
+{
+    if (NULL == str || 0 == strlen || strlen >= 19 /* INT64_MAX */)
+    {
+        return 0;
+    }
+    char tmp_str[strlen + 1];
+    memcpy(tmp_str, str, strlen);
+    tmp_str[strlen] = '\0';
+    return strtoll(tmp_str, NULL, 10);
+}
+
+/*
+ * return value:
+ *  EOF offset of beggining.
+ */
+size_t http_line_header_completed(const char *data, size_t data_len)
+{
+    if (data_len < 4) //"\r\n\r\n"
+    {
+        return 0;
+    }
+    void *ptr = memmem(data, data_len, "\r\n\r\n", 4);
+    if (ptr != NULL)
+    {
+        return (char *)ptr - data + 4;
+    }
+    return 0;
+}
+
+int http_protocol_identify(const char *data, size_t data_len)
+{
+    llhttp_t parser;
+    llhttp_settings_t settings;
+    enum llhttp_errno error;
+
+    if (NULL == data || 0 == data_len)
+    {
+        return -1;
+    }
+    llhttp_settings_init(&settings);
+    llhttp_init(&parser, HTTP_BOTH, &settings);
+
+    data_len = MIN(HTTP_IDENTIFY_LEN, data_len);
+    error = llhttp_execute(&parser, data, data_len);
+    if (error != HPE_OK)
+    {
+        return -1;
+    }
+    return 1;
+}
+
+void http_truncate_extract_headers(const char *raw_data, size_t raw_data_len, const char **headers_start, const char **headers_end)
+{
+    const char *start = memmem(raw_data, raw_data_len, "\r\n", 2);
+    if (start != NULL)
+    {
+        start += 2;
+        *headers_start = start;
+    }
+    else
+    {
+        *headers_start = NULL;
+    }
+    const char *end = memmem(raw_data, raw_data_len, "\r\n\r\n", 4);
+    if (end != NULL)
+    {
+        end += 4;
+        *headers_end = end;
+    }
+    else
+    {
+        *headers_start = NULL;
+        *headers_end = NULL;
+    }
+    return;
 }
\ No newline at end of file
diff --git a/decoders/http/http_decoder_utils.h b/decoders/http/http_decoder_utils.h
index 01a32b2..b6f5bff 100644
--- a/decoders/http/http_decoder_utils.h
+++ b/decoders/http/http_decoder_utils.h
@@ -12,6 +12,7 @@ extern "C"
 #include "stellar/session.h"
 #include "stellar/stellar_mq.h"
 #include "stellar/stellar_exdata.h"
+#include "llhttp.h"
 #ifdef __cplusplus
 }
 #endif
@@ -71,9 +72,32 @@ struct httpd_session_addr
     union
     {
         uint32_t saddr4;
-        uint32_t daddr4;
         struct in6_addr saddr6;
+    };
+    union
+    {
+        uint32_t daddr4;
         struct in6_addr daddr6;
     };
 };
+/*
+  why not use libevent evbuffer?
+    1. evbuffer is a buffer chain, it is not suitable for http half flow cache;
+    2. http_half_flow_buffer is a whole continuous buffer;
+ */
+struct http_buffer
+{
+    char *buffer;
+    size_t buffer_size;
+};
+int http_protocol_identify(const char *data, size_t data_len);
 void httpd_session_get_addr(const struct session *sess, struct httpd_session_addr *addr);
+void http_session_addr_ntop(const struct httpd_session_addr *sesaddr, char *buf, size_t buflen);
+struct http_buffer *http_buffer_new(void);
+void http_buffer_free(struct http_buffer *buffer);
+int http_buffer_add(struct http_buffer *buffer, const char *data, size_t data_len);
+int http_buffer_read(struct http_buffer *buffer, char **data, size_t *data_len);
+char *http_string_dup(const char *str, size_t len);
+long long http_strtoll(const char *str, size_t strlen);
+size_t http_line_header_completed(const char *data, size_t data_len);
+void http_truncate_extract_headers(const char *raw_data, size_t raw_data_len, const char **headers_start, const char **headers_end);
\ No newline at end of file
diff --git a/decoders/http/version.map b/decoders/http/version.map
index a64b729..eacc6bc 100644
--- a/decoders/http/version.map
+++ b/decoders/http/version.map
@@ -6,6 +6,7 @@ global:
 		http_decoder_exit;
 		http_decoder_tcp_stream_msg_cb;
 		http_url_decode;
+		http_get_method;
 	};
 local: *;
 };
\ No newline at end of file