整理 http/http2 公共的 header 字段，存储到 tfe_http.cpp 文件中

plugin/protocol/http2/src/http2_common.cpp

@@ -35,6 +35,50 @@ Http2Plugin *http2_plugin()
 	return &g_http2_plugin;
 }
 
+int
+http2_header_str_to_val(const char *str, const char * map[], unsigned int map_size)
+{
+	for (unsigned int i = 0; i < map_size; i++)
+	{
+		if (!strncasecmp(str, map[i], strlen(map[i])))
+		{
+			return i;
+		}
+	}
+
+	// in http  [TFE_HTTP_UNKNOWN_FIELD] = NULL;      [TFE_HTTP_HOST] = "Host",
+	// in http2 [TFE_HTTP_UNKNOWN_FIELD] = "unknown"; [TFE_HTTP_HOST] = ":authority"
+	if (!strncasecmp(str, ":authority", strlen(":authority")))
+	{
+		return TFE_HTTP_HOST;
+	} else {
+		return TFE_HTTP_UNKNOWN_FIELD;
+	}
+}
+
+const char*
+http2_header_val_to_str(unsigned int val, const char * map[], unsigned int map_size)
+{
+	const static char * host = ":authority";
+	const static char * unknown = "unknown";
+
+	if (val < map_size && val != TFE_HTTP_HOST && val != TFE_HTTP_UNKNOWN_FIELD)
+	{
+		return map[val];
+	}
+
+	// in http  [TFE_HTTP_UNKNOWN_FIELD] = NULL;      [TFE_HTTP_HOST] = "Host",
+	// in http2 [TFE_HTTP_UNKNOWN_FIELD] = "unknown"; [TFE_HTTP_HOST] = ":authority"
+	if (val == TFE_HTTP_HOST)
+	{
+		return host;
+	}
+	else
+	{
+		return unknown;
+	}
+}
+
 const char *
 try_val_to_str_idx(const unsigned int val, const struct value_string *vs, int *idx)
 {