QNetworkAccessManager：将响应与请求相关联

Question

I try to do a simple GET to a REST Service and want to know how I can identify/associate the request to the response I get in my SLOT function. For example I might send multiple requests the same manager and want to pass a messageID in order to read that ID in my SLOT function to associate the response with the responsible request.

Any ideas how to do this?

QNetworkAccessManager manager = new QNetworkAccessManager(this);
connect(manager, SIGNAL(finished(QNetworkReply)),
this, SLOT(replyFinished(QNetworkReply*)));

manager->get(QNetworkRequest(QUrl("http://qt-project.org")));

Answer 1

Short answere: The reply provides a function that returns the request: QNetworkReply::request() ...

Try to check the documention first next time.

EDIT:
If you need more data than that, you have various ways of doing that. For example you could add the data as a dynamic property to the request (see QObject::setProperty ) or store the QNetworkReply returned by QNetworkAccessManager::get function inside a QHash with the data you need.

Answer 2

you could use c++11 bindings:

QNetworkAccessManager manager = new QNetworkAccessManager(this);
connect(manager, SIGNAL(finished(QNetworkReply)), this, 
SLOT(replyFinished(QNetworkReply*)));
QNetworkRequest *request = new QNetworkRequest(QUrl("http://qt-project.org"));
QNetworkReply *reply = manager->get(request );
QObject::connect(reply, &QNetworkReply::finished, std::bind(&YOURCLASS::onGetFinished, this, reply, request));

void YOURCLASS::onGetFinished( QNetworkReply* reply, QNetworkRequest* request ) {}