新建项目T12HttpClient
| T12HttpClient.pro |
| SOURCES += \ main.cpp
QT += network CONFIG += C++11 |
| main.cpp |
#include <QCoreApplication> #include <QNetworkAccessManager> #include <QNetworkRequest> #include <QNetworkReply> int main(int argc,char* argv[]) { QCoreApplication app(argc, argv); QNetworkAccessManager* manager = new QNetworkAccessManager; QNetworkRequest req; //这里，我访问的是tomcat服务器 req.setUrl(QUrl("http://localhost:8080/")); manager->get(req); QObject::connect(manager, &QNetworkAccessManager::finished, [](QNetworkReply* reply){ if(reply->error() != QNetworkReply::NoError) { qDebug() << "Error:" << reply->errorString(); return; } QByteArray buf = reply->readAll(); qDebug() << "OK:"<< buf; }); return app.exec(); } |
| 运行结果：
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| Json数据传输 |
#include <QCoreApplication> #include <QNetworkAccessManager> #include <QNetworkRequest> #include <QNetworkReply> #include <QJsonObject> #include <QJsonDocument> /** * json 数据传输 * @brief main * @param argc * @param argv * @return */ int main(int argc,char* argv[]) { QCoreApplication app(argc, argv); QNetworkAccessManager* manager = new QNetworkAccessManager; QJsonObject obj; obj.insert("username", QString("tuzuoquan")); obj.insert("password", QString("tuzuoquan's password")); QNetworkRequest req; req.setUrl(QUrl("http://XXX/test.cgi")); manager->post(req, QJsonDocument(obj).toJson()); QObject::connect(manager, &QNetworkAccessManager::finished, [](QNetworkReply* reply){ if(reply->error() != QNetworkReply::NoError) { qDebug() << "Error:" << reply->errorString(); return; } QByteArray buf = reply->readAll(); qDebug() << "OK:"<< buf; }); return app.exec(); } |
| 关于cgi的代码 |
|
#include <stdio.h> #include <unistd.h>
#include <QCoreApplication> #include <QTcpSocket> #include <QJsonDocument> #include <QJsonObject> #include <QProcessEnvironment>
int main(int argc, char* argv[]) { printf("Content-type:text/html\n\n"); QCoreApplication app(argc, argv);
QProcessEnvironment envir = QProcessEnvironment::systemEnvironment();
int contentLen = envir.value("CONTENT_LENGTH").toInt(); QTcpSocket socket;
socket.setSocketDescriptor(STDIN_FILENO, QTcpSocket::ConnectedState, QTcpSocket::ReadOnly);
QByteArray buf;
QObject::connect(&socket, &QTcpSocket::readyRead, [&](){ buf += socket.readAll(); if(buf.size() == contentLen) { QJsonDocument doc = QJsonDocument::fromJson(buf); QJsonObject obj = doc.object(); #if 1 QString username = obj.value("username").toString(); QString password = obj.value("password").toString(); printf("username is %s; password is %s", username.toUtf8().data(), password.toUtf8().data()); #else QSqlTableModel model; model.setTable("tuser"); model.setFilter("username='xx'"); model.select(); if(model.rowCount() == 1) printf("Login success"); else printf("Login Error"); #endif app.quit(); } });
return app.exec(); } |
| 上面的程序代码说明，我们可以通过post的方式顺便发送Json数据给服务器！ |
