diff --git a/plugin/business/pangu-http/src/pangu_http.cpp b/plugin/business/pangu-http/src/pangu_http.cpp
index b77f37e..ba734ea 100644
--- a/plugin/business/pangu-http/src/pangu_http.cpp
+++ b/plugin/business/pangu-http/src/pangu_http.cpp
@@ -1411,13 +1411,11 @@ void http_replace(const struct tfe_stream * stream, const struct tfe_http_sessio
 		rewrite_buff = NULL;
 		rewrite_sz = 0;
 
-		if (tfe_http_in_response(events) && in_resp_spec->content_type != NULL
-			&& (strstr(in_resp_spec->content_type, "charset=utf-8") ||
-			   (strstr(in_resp_spec->content_type, "charset=UTF-8"))))
+		if (tfe_http_in_response(events) && in_resp_spec->content_type != NULL 
+			&& strcasestr(in_resp_spec->content_type, "charset=utf-8"))
 		{
 			options = 1;
 		}
-
 		rewrite_sz = execute_replace_rule(__http_body, __http_body_len, r_zone,
 									rep_ctx->rule, rep_ctx->n_rule, &rewrite_buff, options);
 
diff --git a/plugin/protocol/http2/src/http2_stream.cpp b/plugin/protocol/http2/src/http2_stream.cpp
index 878d466..4565c14 100644
--- a/plugin/protocol/http2/src/http2_stream.cpp
+++ b/plugin/protocol/http2/src/http2_stream.cpp
@@ -157,7 +157,7 @@ tfe_h2_header_modify_field(struct tfe_h2_header *header, nghttp2_nv *hdrs, const
 		{
 			hdrs[nvlen].value = h2_field->nv.value;
 			hdrs[nvlen].valuelen = h2_field->nv.valuelen;
-		}
+		}		
 		hdrs[nvlen].flags = h2_field->nv.flags;
 		nvlen++;
 	}
@@ -864,9 +864,9 @@ nghttp2_submit_data_by_h2_half(struct tfe_h2_stream *connection,
 						      struct tfe_h2_session *h2_session,
 						      enum tfe_conn_dir dir)
 {
-	enum tfe_stream_action stream_action = ACTION_DROP_DATA;
-
-	struct tfe_h2_half_private *h2_half = (dir == CONN_DIR_UPSTREAM) ? h2_session->resp : h2_session->req;
+	enum tfe_stream_action stream_action = ACTION_DROP_DATA;	
+	struct tfe_h2_half_private *h2_half = tfe_h2_stream_get_half(h2_session, dir);
+	
 	nghttp2_session *ngh2_session = tfe_h2_stream_get_nghttp2_session(connection, dir);
 
 	if (h2_session->plugin_built_resp)
@@ -1239,7 +1239,7 @@ nghttp2_submit_complete_data(struct tfe_h2_stream *h2_stream_info,
 	h2_half->body_state = H2_READ_STATE_COMPLETE;
 	h2_half->message_state = H2_READ_STATE_COMPLETE;
 
-	stream_action = nghttp2_submit_data_by_h2_half(h2_stream_info, h2_session, CONN_DIR_UPSTREAM);
+	stream_action = nghttp2_submit_data_by_h2_half(h2_stream_info, h2_session, dir);
 	if (stream_action == ACTION_DROP_DATA){
 		xret = nghttp2_session_send(ngh2_session);
 		if (xret != 0) {
@@ -1650,7 +1650,7 @@ finish:
 	return 0;
 }
 
-static int fill_req_spec_from_handle(struct tfe_h2_half_private *half_private)
+static void fill_req_spec_from_handle(struct tfe_h2_half_private *half_private)
 {
 	int urllen = 0;
 	struct tfe_h2_field *h2_field = NULL, *peer_h2_field = NULL;
@@ -1677,10 +1677,8 @@ static int fill_req_spec_from_handle(struct tfe_h2_half_private *half_private)
 	if(urltmp){
 		sprintf(urltmp, "%s%s", (char *)req_spec->host, (char *)req_spec->uri);
 		req_spec->url = urltmp;
-		if (strcasestr(urltmp, "twitter"))
-			return 1;
 	}
-	return 0;
+	return;
 }
 
 #ifdef TFE_CACHE
@@ -1728,7 +1726,7 @@ finish:
 
 static enum tfe_stream_action
 nghttp2_client_frame_submit_header(struct tfe_h2_stream *h2_stream_info,
-							   	   struct tfe_h2_session *h2_session, int twitter)
+							   	   struct tfe_h2_session *h2_session)
 {
 	int32_t stream_id    = -1;
     struct tfe_h2_header *headers   = NULL;
@@ -1757,24 +1755,19 @@ nghttp2_client_frame_submit_header(struct tfe_h2_stream *h2_stream_info,
 		return ACTION_FORWARD_DATA;
 	}
 
-	nghttp2_nv hdrs[headers->nvlen];
-
 	method = nghttp2_get_method(h2_session->req);
-	if ((method == (enum tfe_http_std_method)NGHTTP2_METHOD_POST ||
-		method == (enum tfe_http_std_method)NGHTTP2_METHOD_PUT) && twitter != 1){
-		if (h2_session->plugin_built_req)
+	if (method == (enum tfe_http_std_method)NGHTTP2_METHOD_POST || method == (enum tfe_http_std_method)NGHTTP2_METHOD_PUT)
+	{
+		if (h2_session->plugin_built_req != NULL)
 		{
 			stream_action = (enum tfe_stream_action)ACTION_USER_DATA;
 			return stream_action;
 		}
-	    stream_id = nghttp2_submit_headers(h2_stream_info->as_client, headers->flag,
-                                	  	 -1, NULL, tfe_h2_header_modify_field(headers, hdrs, ":path", req->url_storage),
-                                       	 headers->nvlen, h2_session);
-	}else{
-		stream_id = nghttp2_submit_request(h2_stream_info->as_client, NULL,
-								  		 tfe_h2_header_modify_field(headers, hdrs, ":path", req->url_storage),
-								   		 headers->nvlen, NULL, h2_session);
-	}
+	}	
+	nghttp2_nv hdrs[headers->nvlen];	
+	stream_id = nghttp2_submit_headers(h2_stream_info->as_client, headers->flag,
+									  -1, NULL, tfe_h2_header_modify_field(headers, hdrs, ":path", req->url_storage),
+									  headers->nvlen, h2_session);
 	if (stream_id < 0){
 		TFE_LOG_ERROR(logger()->handle, "Could not submit request: %s",
 					  nghttp2_strerror(stream_id));
@@ -1790,7 +1783,7 @@ finish:
 static int
 nghttp2_client_submit_header(struct tfe_h2_stream *h2_stream_info, int32_t stream_id)
 {
-	int xret = -1, twitter = 1;
+	int xret = -1;
 	struct tfe_h2_half_private *req = NULL;
     struct tfe_h2_session *h2_session = NULL;
 
@@ -1805,12 +1798,12 @@ nghttp2_client_submit_header(struct tfe_h2_stream *h2_stream_info, int32_t strea
 	assert(h2_session->ngh2_stream_id == stream_id);
 
 	req = h2_session->req;
-	twitter = fill_req_spec_from_handle(h2_session->req);
+	fill_req_spec_from_handle(h2_session->req);
 
 	req->event_cb(req, EV_HTTP_REQ_HDR, NULL, 0, req->event_cb_user);
 
 	nghttp2_write_log(h2_session, h2_stream_info->tf_stream->str_stream_info, CONN_DIR_DOWNSTREAM);
-	stream_action = nghttp2_client_frame_submit_header(h2_stream_info, h2_session, twitter);
+	stream_action = nghttp2_client_frame_submit_header(h2_stream_info, h2_session);
 	if (stream_action == ACTION_DROP_DATA){
 		xret = nghttp2_session_send(h2_stream_info->as_client);
 		if (xret != 0) {