获取http请求的执行时间

Question

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";
}

}

我正在尝试获取合适的服务器。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一个。可能吗？因为它是一个异步函数，所以我不知道该怎么做。你会怎么做？

Answer 1

这有帮助吗？从文档 HTTPRequest and HTTPResponse ....

你可以设置一个字符串标签来标识你的请求，这个标签可以在HttpResponse->getHttpRequest->getTag()

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

取回字符串标记以识别请求。最佳做法是在 MyClass::onMyHttpRequestCompleted(sender, HttpResponse*) 回调

中使用它

    const char* HTTPResponse::getTag();

编辑：您可以使用这些独特的标签将请求与全局哈希中的异步响应配对，从而测量 "response time"。 HTTP* 类好像没有什么接口给你执行时间。

编辑：有两种方法可以将 HTTPResponse 与 HTTPRequest 配对。在这里，我尝试将第二种方法与一些 quick/dirty 代码一起使用。请convert/use你觉得合适。

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));
        }
};

在发送请求的地方使用以下代码：

#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;
    // ....
}

获取http请求的执行时间

Get execution time of http request

c++

cocos2d-x-3.x