c++ - Http 帖子不显示内容

Question

所以我试图发布到我的 localhost 以获得结果，无论是否成功，我遇到了问题。我认为它没有发送请求或者只是没有得到页面的结果。我补充说:

QT += network

还是不行

void sendPost() {

QEventLoop eventLoop;
QNetworkAccessManager mgr;

QUrlQuery postData;
postData.addQueryItem("unm", "user");
postData.addQueryItem("pwd", "81238as");

QNetworkRequest request(QUrl(QString("http://localhost/login.php")));
request.setHeader(QNetworkRequest::ContentTypeHeader, "application/x-www-form-urlencoded");

QNetworkReply *reply = mgr.post(request, postData.toString(QUrl::FullyEncoded).toUtf8());
eventLoop.exec();

if (reply->error() == QNetworkReply::NoError) {

    QString data = reply->readAll();
        qDebug(data.toUtf8().constData());
        delete reply;
}
else {
    qDebug() << "Failure" <<reply->errorString();
    delete reply;
  }
}

感谢您的宝贵时间。

Answer 1

你运行 eventLoop 所以它会阻止你所有的应用程序，当你的经理完成时你应该退出 eventLoop 。下一个代码有效，但老实说，我总是用信号和槽来做这个，所以我不知道 QEventLoop 的使用是否是正确的方法。

试试这个:

#include <QObject>
//...
QEventLoop eventLoop;
QNetworkAccessManager mgr;

QUrlQuery postData;
postData.addQueryItem("unm", "user");
postData.addQueryItem("pwd", "81238as");

QNetworkRequest request(QUrl(QString("http://localhost/login.php")));
request.setHeader(QNetworkRequest::ContentTypeHeader, "application/x-www-form-urlencoded");

QNetworkReply *reply = mgr.post(request, postData.toString(QUrl::FullyEncoded).toUtf8());
QObject::connect(&mgr,SIGNAL(finished(QNetworkReply*)),&eventLoop,SLOT(quit()));
eventLoop.exec();

if (reply->error() == QNetworkReply::NoError) {

    QString data = reply->readAll();
        qDebug(data.toUtf8().constData());
        delete reply;
}
else {
    qDebug() << "Failure" <<reply->errorString();
    delete reply;
  }