java 上的服务器未收到来自 Qt 客户端的消息

Question

我有非常简单的 java 服务器：

int port = 2245;
       try {
         ServerSocket ss = new ServerSocket(port);
         System.out.println("Waiting for a client...");

         Socket incomingClient = ss.accept();
         InputStream i = incomingClient.getInputStream();
         OutputStream o = incomingClient.getOutputStream();  // Use it write to the Client Socket
         InputStreamReader isr = new InputStreamReader(i);
         BufferedReader br = new BufferedReader(isr);
         String str = new String();

         while ((str = br.readLine())!=null){
                System.out.println("str = " + str);
                o.write(123); //("message from server");
          }
       } catch(Exception x) { x.printStackTrace(); }

我有简单的 Qt 客户端，它使用 QNetworkAccessManager

QNetworkAccessManager *manager = new QNetworkAccessManager(this);
QUrl url("http://127.0.0.1:2245");
url.port(6666);
QByteArray postData;
QNetworkRequest request(url);
request.setHeader(QNetworkRequest::ContentTypeHeader, "application/x-www-form-urlencoded");

QString postKey("SomeKey");
postData.append(postKey);
QObject::connect(manager, SIGNAL(finished(QNetworkReply *)), this, SLOT(replyFinished(QNetworkReply *)));

我在 mainwindow.h 中声明了槽 replyFinished

public slots: 
void replyFinished(QNetworkReply* reply);

在最好的情况下服务器得到一些 headers like(POST / HTTP/1.1 Content-Type: application/x-www-form-urlencoded 等)

但是在服务器上我无法读取来自客户端的消息并且客户端没有收到来自 java 服务器

的任何响应

Answer 1

Qt 客户端的正确代码是这样的：

QNetworkAccessManager *manager = new QNetworkAccessManager(this);
QUrl url("http://192.168.0.101:8000");
url.port(8000);

QByteArray postData;
QNetworkRequest request(url);
request.setHeader(QNetworkRequest::ContentTypeHeader, "application/x-www-form-urlencoded");

QString postKey("some data");
postData.append(postKey);
QObject::connect(manager, SIGNAL(finished(QNetworkReply *)), this, SLOT(replyFinished(QNetworkReply *)));

manager->post(request, postData);

}

并获得响应声明并实施以下插槽

void MainWindow::replyFinished(QNetworkReply *reply){
qDebug() << "Status" << reply->errorString();
qDebug() << "Status" << reply->error();


     QByteArray data = reply->readAll(); //It's works!
     qDebug() << "data: " << data;

}

对于服务器端，我使用了 HttpServer，它在 JDK

的最新版本中可用

java 上的服务器未收到来自 Qt 客户端的消息

Server on java does not get message from Qt client

java

qt

server

client

qnetworkaccessmanager