获取http请求的执行时间

时间:2016-08-17 20:18:42

标签: c++ cocos2d-x-3.x

我有以下代码:

void GameScene::onGetServersRequestCompleted( cocos2d::network::HttpClient *sender, cocos2d::network::HttpResponse *response )
{

if( 200 == response->getResponseCode() ) {
    std::vector<char> *buffer = response->getResponseData();
    std::string serversString( buffer->begin(), buffer->end() );

    Json::Reader reader;
    Json::Value root;

    reader.parse(serversString, root);

    const Json::Value servers = root["servers"];
    for ( int i = 0; i < servers.size(); ++i ) {
        //CCLOG("%s",  servers[i].asString().c_str());
        cocos2d::network::HttpRequest *request = new cocos2d::network::HttpRequest();
        request->setUrl("http://" + servers[i].asString() + "/info");
        request->setRequestType(cocos2d::network::HttpRequest::Type::GET);
        request->setResponseCallback(CC_CALLBACK_2(GameScene::onServerRequestCompleted, this));
        cocos2d::network::HttpClient::getInstance()->send(request);
        request->release();
    }

} else {
    CCLOG("Request Failed! Response Code: %i\n", response->getResponseCode());
    /*std::vector<char> *buffer = response->getResponseData();
    std::string serversString( buffer->begin(), buffer->end() );
    CCLOG("%s", serversString.c_str());*/
    this->serverIp = "185.8.166.41";
}

}

我正在尝试获得正确的服务器。我想做的是获取每个服务器请求的执行时间并获得最快的请求。可能吗?因为它是一个异步函数,我不知道该怎么做。你会怎么做?

1 个答案:

答案 0 :(得分:1)

这有帮助吗?从文档中 HTTPRequestHTTPResponse ....

您可以设置字符串标记来标识您的请求,此标记可以在HttpResponse-&gt; getHttpRequest-&gt; getTag()

中找到
    void HTTPRequest::setTag(const char *tag);

获取字符串标记以标识请求。 最佳实践是在MyClass :: onMyHttpRequestCompleted(sender,HttpResponse *)回调中使用它

    const char* HTTPResponse::getTag();

编辑:您可以使用这些唯一标记将请求与全局哈希中的异步响应配对,从而测量“响应时间”。 HTTP *类中似乎没有任何接口可以为您提供执行时间。

编辑: 有两种方法可以将HTTPResponse与HTTPRequest配对。在这里,我尝试使用第二种方法和一些快速/脏代码。请根据需要转换/使用它。

  1. setTag/getTag
  2. setUserData/getUserData
  3. 创建文件HTTPCustomData.h:

    #include <time.h>
    class HTTPCustomData {
        private:
            time_t t1;
        public:
            HTTPCustomData() { time(&t1); }
            double getTimePassed(void) {
                time_t t2; time(&t2); return(difftime(t2,t1));
            }
    };
    

    使用以下代码发送请求:

    #include "HTTPCustomData.h"
    for ( int i = 0; i < servers.size(); ++i ) {
        // ...
        // ... Before "send"
        request->setUserData(new HTTPCustomData());
        cocos2d::network::HttpClient::getInstance()->send(request);
        request->release();
    }
    

    稍后在GameScene :: onServerRequestCompleted方法中,......

    #include <memory>
    #include <iostream>
    #include "HTTPCustomData.h"
    void GameScene::onServerRequestCompleted(...) {
    {
        // ...
        std::unique_ptr<HTTPCustomData> h(
            (HTTPCustomData *)(response->getHTTPRequst()->getUserData())
        );
        std::cout << h->getTimePassed() << std::endl;
        // ....
    }