C++使用QtHttpServer开发服务端Server的Http POST接口和客户端Client示例

Client HTTP POST

假设http://127.0.0.1:8888/post/是一个能够接受POST请求的路径，我们想要向它提交一段json数据，用Qt可以这样实现：

Suppose we want to make an HTTP POST with json body to http://127.0.0.1:8888/post/.

QCoreApplication app(argc, argv);
QNetworkAccessManager *mgr = new QNetworkAccessManager;
const QUrl url(QStringLiteral("http://127.0.0.1:8888/post/"));
QNetworkRequest request(url);
request.setHeader(QNetworkRequest::ContentTypeHeader, "application/json; charset=utf-8");
QJsonObject obj;
obj["key1"] = "value1";
obj["key2"] = "value2";
QJsonDocument doc(obj);
QByteArray data = doc.toJson();
QNetworkReply *reply = mgr->post(request, data);QObject::connect(reply, &QNetworkReply::finished, [=](){if(reply->error() == QNetworkReply::NoError){QString contents = QString::fromUtf8(reply->readAll());qDebug() << contents;}else{QString err = reply->errorString();qDebug() << err;}reply->deleteLater();mgr->deleteLater();
});

Http Server

而这个本地的Server，亦可使用QtHttpServer方便实现：

Server can be implemented by QtHttpServer easily, too.

QHttpServer http_server;
http_server.route("/", []() {
return "Hello QtHttpServer";
});
http_server.route("/post/", QHttpServerRequest::Method::POST,
[](const QHttpServerRequest &request)
{qDebug() << "received requestBody" << request.body();return QJsonObject{{"message", "finish"}};
});
http_server.listen(QHostAddress::Any, 8888);