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In this article, the editor introduces in detail "how Qt realizes the Get/Post request of HTTP", the content is detailed, the steps are clear, and the details are handled properly. I hope that this article "how to realize the Get/Post request of HTTP by Qt" can help you solve your doubts.

With Qt's NetWork module, you can easily implement Get/Post requests from HTTP without having to refer to third-party libraries like libcurl again.

Of course, Qt's NetWork module provides much more than just HTTP.

Header file # include # include # include

In addition, you need to reference the Qt5Network.lib library to use the Qt network module.

Get

First construct a QNetworkAccessManager object, which provides the function of sending QNetworkRequest network requests and receiving QNetworkReply network replies.

QNetworkAccessManager also provides caching and Cookie management, proxy settings and other functions.

QNetworkRequest provides the encapsulation of this network request. In this example, only the simplest requset is constructed without any parameter setting. QNetworkRequest provides many ways to configure the request, for example, we can use QNetworkRequest::setHeader to set the request first class.

Void QtGuiApplication::onBtnGetClicked () {QNetworkRequest request; QNetworkAccessManager* naManager = new QNetworkAccessManager (this); QMetaObject::Connection connRet = QObject::connect (naManager, SIGNAL (finished (QNetworkReply*)), this, SLOT (requestFinished (QNetworkReply*); Q_ASSERT (connRet); request.setUrl (QUrl ("https://www.baidu.com")); QNetworkReply* reply = naManager- > get (request);}

The request is asynchronous, and when the request is completed, void requestFinished (QNetworkReply* reply) will be called; slot function:

Void QtGuiApplication::requestFinished (QNetworkReply* reply) {/ / get the http status code QVariant statusCode = reply- > attribute (QNetworkRequest::HttpStatusCodeAttribute); if (statusCode.isValid ()) qDebug ()

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