增加标准HTTP头部定义转字符串的工具函数，修正pango-http插件在初始化时没有设置PME的错误。

common/src/tfe_http.cpp

@@ -14,6 +14,87 @@ struct tfe_http_half * tfe_http_response_create(int major_version, int resp_code
 	return NULL;
 }
 
+static const char * __str_std_header_field_map[] =
+{
+	[TFE_HTTP_UNKNOWN_FIELD] = NULL,
+	[TFE_HTTP_HOST] = "Host",
+	[TFE_HTTP_REFERER] = "Referer",
+	[TFE_HTTP_USER_AGENT] = "User-Agent",
+	[TFE_HTTP_COOKIE] = "Cookie",
+	[TFE_HTTP_PROXY_AUTHORIZATION] = "Proxy-Authorization",
+	[TFE_HTTP_AUTHORIZATION] = "Authorization",
+	[TFE_HTTP_LOCATION] = "Location",
+	[TFE_HTTP_SERVER] = "Server",
+	[TFE_HTTP_ETAG] = "Etag",
+	[TFE_HTTP_DATE] = "Date",
+	[TFE_HTTP_TRAILER] = "Trailer",
+	[TFE_HTTP_TRANSFER_ENCODING] = "Transfer-Encoding",
+	[TFE_HTTP_VIA] = "Via",
+	[TFE_HTTP_PRAGMA] = "Pragma",
+	[TFE_HTTP_CONNECTION] = "Connection",
+	[TFE_HTTP_CONT_ENCODING] = "Content-Encoding",
+	[TFE_HTTP_CONT_LANGUAGE] = "Content-Language",
+	[TFE_HTTP_CONT_LOCATION] = "Content-Location",
+	[TFE_HTTP_CONT_RANGE] = "Content-Range",
+	[TFE_HTTP_CONT_LENGTH] = "Content-Length",
+	[TFE_HTTP_CONT_TYPE] = "Content-Type",
+	[TFE_HTTP_CONT_DISPOSITION] = "Content-Disposition",
+	[TFE_HTTP_EXPIRES] = "Expires",
+	[TFE_HTTP_ACCEPT_ENCODING] = "Accept-Encoding"
+};
+
+struct http_field_name * http_field_name_duplicate(const struct http_field_name * orig)
+{
+	struct http_field_name * __duplicated = ALLOC(struct http_field_name, 1);
+	assert(__duplicated != NULL);
+
+	if (orig->field_id == TFE_HTTP_UNKNOWN_FIELD)
+	{
+		__duplicated->field_id = TFE_HTTP_UNKNOWN_FIELD;
+		__duplicated->field_name = tfe_strdup(orig->field_name);
+	}
+	else
+	{
+		__duplicated->field_id = orig->field_id;
+		__duplicated->field_name = NULL;
+	}
+
+	return __duplicated;
+}
+
+int http_field_name_compare(const struct http_field_name * lvalue, const struct http_field_name * rvalue)
+{
+	if (lvalue->field_id != rvalue->field_id)
+	{
+		return (lvalue->field_id - rvalue->field_id);
+	}
+
+	/* unknown field, compare field_name in string */
+	if (lvalue->field_id == TFE_HTTP_UNKNOWN_FIELD)
+	{
+		return strcasecmp(lvalue->field_name, rvalue->field_name);
+	}
+
+	/* field_id is equal, but not unknown, hit */
+	return 0;
+}
+
+struct http_field_name * http_field_construct_from_string(const char * str_field)
+{
+	return NULL;
+}
+
+const char * http_field_to_string(const struct http_field_name * field)
+{
+	if (field->field_id != TFE_HTTP_UNKNOWN_FIELD) return __str_std_header_field_map[field->field_id];
+	return field->field_name;
+}
+
+void http_field_destory(struct http_field_name * field)
+{
+	free(field);
+}
+
 struct http_frame_session_ctx
 {
 	struct http_frame_plugin_status * plugin_status;