curl_easy_perform somehow timeout

[ZHANG106]

CurlHttpClient.cc line 194, curl_easy_perform return CURLE_OPERATION_TIMEDOUT while the net is tested OK. My sample code like

    HandleAIEngineMessageRequest request;
    request.setSessionToken(sessionToken);
    request.setData(data);
    request.setMsgType(msgType);

    WuyingAIClient::HandleAIEngineMessageOutcome outcome = client.handleAIEngineMessage(request);