diff --git a/plugin/business/pangu-http/src/pangu_http.cpp b/plugin/business/pangu-http/src/pangu_http.cpp
index 34723b1..80721b2 100644
--- a/plugin/business/pangu-http/src/pangu_http.cpp
+++ b/plugin/business/pangu-http/src/pangu_http.cpp
@@ -1411,7 +1411,7 @@ void http_replace(const struct tfe_stream * stream, const struct tfe_http_sessio
 		rewrite_buff = NULL;
 		rewrite_sz = 0;
 
-		if (in_resp_spec != NULL && in_resp_spec->content_type != NULL
+		if (tfe_http_in_response(events) && in_resp_spec->content_type != NULL
 			&& strstr(in_resp_spec->content_type, "charset=utf-8"))
 		{
 			options = 1;
diff --git a/plugin/business/pangu-http/src/pattern_replace.cpp b/plugin/business/pangu-http/src/pattern_replace.cpp
index 086970c..34bb084 100644
--- a/plugin/business/pangu-http/src/pattern_replace.cpp
+++ b/plugin/business/pangu-http/src/pattern_replace.cpp
@@ -288,22 +288,24 @@ static char *find_insert_position(char * in)
 {
 	char *insert_from = NULL;
 	char *script_local = NULL;
+	char *head_in = NULL;
 
 	if (in == NULL)
 	{
 		return NULL;
 	}
 
+	head_in = strstr(in, "</head>");
 	insert_from = strstr(in, "jquery");
-	if (insert_from != NULL)
+	if (insert_from != NULL && head_in != NULL && (head_in - insert_from) > 0)
 	{
-		script_local = strstr(insert_from, "</script>");
-		if (script_local && strstr(script_local, "</head>"))
-			insert_from = script_local + sizeof("</script>");
+		script_local=strstr(insert_from, "</script>");
+		if (script_local)
+			insert_from=script_local + sizeof("</script>");
 	}
 	else
 	{
-		insert_from=strstr(in, "</head>");
+		insert_from=head_in;
 	}
 	return insert_from;
 }