Python 如何在PyQt5中使用QWebSocket创建websocket客户端

我想在PyQt5中使用QWebSocket创建一个websocket客户端。为了方便起见，假设我有一个websocket服务器，源代码如下：

from PyQt5 import QtCore, QtWebSockets, QtNetwork, QtGui
from PyQt5.QtWidgets import QApplication, QMainWindow, QMenu, QAction
from PyQt5.QtCore import QUrl

class MyServer(QtCore.QObject):
    def __init__(self, parent):
        super(QtCore.QObject, self).__init__(parent)
        self.clients = []
        self.server = QtWebSockets.QWebSocketServer(parent.serverName(), parent.secureMode(), parent)
        if self.server.listen(QtNetwork.QHostAddress.LocalHost, 1302):
            print('Connected: '+self.server.serverName()+' : '
                  +self.server.serverAddress().toString()+':'+str(self.server.serverPort()))
        else:
            print('error')
        self.server.newConnection.connect(self.onNewConnection)
        self.clientConnection = None
        print(self.server.isListening())

    def onNewConnection(self):
        self.clientConnection = self.server.nextPendingConnection()
        self.clientConnection.textMessageReceived.connect(self.processTextMessage)

        self.clientConnection.binaryMessageReceived.connect(self.processBinaryMessage)
        self.clientConnection.disconnected.connect(self.socketDisconnected)

        print("newClient")
        self.clients.append(self.clientConnection)

    def processTextMessage(self, message):
        print(message)
        if self.clientConnection:
            for client in self.clients:
                # if client!= self.clientConnection:
                client.sendTextMessage(message)
            # self.clientConnection.sendTextMessage(message)

    def processBinaryMessage(self, message):
        print("b:",message)
        if self.clientConnection:
            self.clientConnection.sendBinaryMessage(message)

    def socketDisconnected(self):
        if self.clientConnection:
            self.clients.remove(self.clientConnection)
            self.clientConnection.deleteLater()

if __name__ == '__main__':
    import sys
    app = QApplication(sys.argv)
    serverObject = QtWebSockets.QWebSocketServer('My Socket', QtWebSockets.QWebSocketServer.NonSecureMode)
    server = MyServer(serverObject)
    serverObject.closed.connect(app.quit)
    app.exec_()

它可以创建一个websocket服务器，我使用JavaScript对其进行了测试，效果很好。但我可以找到一种使用Qwebsocket创建客户端的方法。我的客户端代码如下：

client =  QtWebSockets.QWebSocket("",QtWebSockets.QWebSocketProtocol.Version13,None)
client.open(QUrl("ws://127.0.0.1:1302"))
client.sendTextMessage("asd")
client.close()

---

服务器似乎没有收到客户机发送的消息，如何创建websocket客户机并使用Qwebsocket发送消息？

这是qt控制台程序的典型问题，您需要在python构造函数之外调用您的客户机方法（

\uuuu init\uuu

）

我稍微修改了您的服务器，添加了一些错误测试（没有什么新的内容）：

客户端使用一些

QTimer

调用

\uuuuu init\uuuu

方法之外的所需方法。我还添加了ping/pong方法来检查连接：

import sys

from PyQt5 import QtCore, QtWebSockets, QtNetwork
from PyQt5.QtCore import QUrl, QCoreApplication, QTimer
from PyQt5.QtWidgets import QApplication


class Client(QtCore.QObject):
    def __init__(self, parent):
        super().__init__(parent)

        self.client =  QtWebSockets.QWebSocket("",QtWebSockets.QWebSocketProtocol.Version13,None)
        self.client.error.connect(self.error)

        self.client.open(QUrl("ws://127.0.0.1:1302"))
        self.client.pong.connect(self.onPong)

    def do_ping(self):
        print("client: do_ping")
        self.client.ping(b"foo")

    def send_message(self):
        print("client: send_message")
        self.client.sendTextMessage("asd")

    def onPong(self, elapsedTime, payload):
        print("onPong - time: {} ; payload: {}".format(elapsedTime, payload))

    def error(self, error_code):
        print("error code: {}".format(error_code))
        print(self.client.errorString())

    def close(self):
        self.client.close()

def quit_app():
    print("timer timeout - exiting")
    QCoreApplication.quit()

def ping():
    client.do_ping()

def send_message():
    client.send_message()

if __name__ == '__main__':
    global client
    app = QApplication(sys.argv)

    QTimer.singleShot(2000, ping)
    QTimer.singleShot(3000, send_message)
    QTimer.singleShot(5000, quit_app)

    client = Client(app)

    app.exec_()

服务器输出：

G:\Qt\QtTests>python so_qwebsocket_server.py
server name: My Socket
Listening: My Socket:127.0.0.1:1302
True
onNewConnection
newClient
in processTextFrame
        Frame: asd ; is_last_frame: True
processTextMessage - message: asd
socketDisconnected

G:\Qt\QtTests>python so_qwebsocket_client.py
client: do_ping
onPong - time: 0 ; payload: b'foo'
client: send_message
timer timeout

客户端输出：

G:\Qt\QtTests>python so_qwebsocket_server.py
server name: My Socket
Listening: My Socket:127.0.0.1:1302
True
onNewConnection
newClient
in processTextFrame
        Frame: asd ; is_last_frame: True
processTextMessage - message: asd
socketDisconnected

G:\Qt\QtTests>python so_qwebsocket_client.py
client: do_ping
onPong - time: 0 ; payload: b'foo'
client: send_message
timer timeout

---

总而言之，如果您在一个简单的GUI中使用您的客户端（例如，将

客户端.sendTextMessage（）

移动到

\uuuu init\uuuu

之外，并连接一个按钮单击以实际发送消息），由于它的异步性质，它应该可以正常工作

谢谢你，你帮了我很多。嘿，我试着实现服务器。。。点击一个按钮，服务器就启动了，到目前为止还不错。但是当我尝试连接websocket客户端（我使用websocket）时，它无法连接到错误消息``websocket:websocket错误：I/O失败websocket:error running``看起来握手有问题，但我不确定。你能提供一些见解吗？（找到解决方案），我需要将当前窗口作为父窗口传递