fix memory leak bugs

common/include/tfe_rpc.h

@@ -0,0 +1,27 @@
+#pragma once
+#include "tfe_future.h"
+#include "event2/event.h"
+
+struct tfe_rpc_response_result{
+    int status_code;
+    const char* status_msg;
+    char* data;
+    int len;
+};
+
+enum TFE_RPC_FLAG
+{
+    CHUNK_CB = 0,
+    DONE_CB,
+};
+
+enum TFE_RPC_METHOD
+{
+    GET = 0,
+    POST,
+};
+
+
+struct tfe_rpc_response_result* tfe_rpc_release(void* result);
+
+void tfe_rpc_async_ask(struct future* f, const char* url, enum TFE_RPC_METHOD method, enum TFE_RPC_FLAG flag, const char* data, int data_len, struct event_base * evbase);