Question

我尝试与PySide建立网络连接（Ubuntu 15.04，Python3.4，PySide 1.2.4）。我使用了the documentation中的示例代码。

QNetworkAccessManager没有发送请求，我也没有回答。我使用QNetworkSession(QNetworkConfigurationManager().defaultConfiguration()).State()检查了网络状态，但它说状态无效。这似乎毫无意义，因为我在通过以太网电缆进行网络连接的台式机上。

我完整的测试示例如下：

#!/usr/bin/python3
# -*- coding: utf-8 -*-

import sys
from PySide.QtGui import QApplication
from PySide.QtCore import QUrl
from PySide.QtNetwork import QNetworkAccessManager, QNetworkRequest, QNetworkSession, QNetworkConfigurationManager


def replyFinished(reply):
    print(reply)


if __name__ == "__main__":
    app = QApplication(sys.argv)
    manager = QNetworkAccessManager()
    manager.finished.connect(replyFinished)
    print(QNetworkSession(QNetworkConfigurationManager().defaultConfiguration()).State())
    print("Sending request")
    print(manager.get(QNetworkRequest(QUrl("http://www.heise.de/ct/"))))

打印

PySide.QtNetwork.QNetworkSession.State.Invalid
Sending request
<PySide.QtNetwork.QNetworkReply object at 0x7f4b59c9af08>

但它应该显示PySide.QtNetwork.QNetworkReply对象两次。

Answer 1

我的例子太小了。我意识到这一点是因为Pavel Strakhov的评论。我将它扩展为显示带按钮的窗口。通过单击按钮，它成功连接。 QNetworkSession(QNetworkConfigurationManager().defaultConfiguration()).State()仍然无效，但有效。

这是工作代码：

#!/usr/bin/python3
# -*- coding: utf-8 -*-

import sys
from PySide.QtGui import QApplication, QWidget, QBoxLayout, QPushButton
from PySide.QtCore import QUrl
from PySide.QtNetwork import QNetworkAccessManager, QNetworkRequest,  QNetworkSession, QNetworkConfigurationManager


class Window(QWidget):
   def __init__(self):
        super().__init__()
        self.manager = QNetworkAccessManager()
        self.manager.finished.connect(self.reply_finished)
        layout = QBoxLayout(QBoxLayout.TopToBottom)
        button = QPushButton("connect")
        button.clicked.connect(self.network_connect)
        layout.addWidget(button)
        self.setLayout(layout)
        self.setWindowTitle("Network test")
        self.setGeometry(100, 100, 200, 150)
        self.show()

    def network_connect(self):
        print(QNetworkSession(QNetworkConfigurationManager().defaultConfiguration()).State())
        request = QNetworkRequest(QUrl("http://example.org"))
        print("Sending request")
        self.manager.get(request)

    def reply_finished(self, reply):
        print(reply)
        print(reply.readData(500))


if __name__ == "__main__":
    app = QApplication(sys.argv)
    window = Window()
    app.exec_()

Pyside：QNetworkAccessManager不发送任何请求

1 个答案: