Python: PySide(Qt)异步获取网页源码

学习PyQt UI编程笔记。相对PyQt来说，PySide资料为少。

此篇记录异步获取代码后，同步显示于界面窗体中，涉及线程网步，此为知识点。

直录代码：

# encoding: utf-8

from PySide.QtGui import *

from PySide.QtCore import *

from gethtml_ui import *

from options_ui import *

import threading

# Make main window class

class OptionsDialog(QDialog):

    def __init__(self, parent=None, title=''):

        super(OptionsDialog, self).__init__(parent)

        self.setWindowFlags(Qt.Dialog | Qt.WindowCloseButtonHint | Qt.MSWindowsFixedSizeDialogHint)

        self.ui = Ui_Options()

        self.ui.setupUi(self)

        self.setWindowTitle(title)

class GetHtmlDialog(QDialog):

    htmlGet = Signal(str)

    def __init__(self, parent=None):

        super(GetHtmlDialog, self).__init__(parent)

        # 最大化&最小化按钮

        self.setWindowFlags(Qt.Window)

        self.ui = Ui_Dialog()

        self.ui.setupUi(self)

        self.setWindowTitle('Get Html')

        self.ui.btnGet.setEnabled(False)

        clipboard = QApplication.clipboard()

        # url = clipboard.text()

        # if url == '':

        url = 'https://www.baidu.com'

        self.ui.edtUrl.setText(url)

        # 同步更新内容

        self.htmlGet.connect(lambda s: self.ui.txtHtml.setPlainText(s))

    def get_html(self, url):

        import urllib2

        if not 'http' in url:

            url = 'http://' + url

        try:

            req = urllib2.Request(url)

            req.add_header('User-Agent', 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Maxthon/4.9.5.1000 Chrome/39.0.2146.0 Safari/537.36')

            res = urllib2.urlopen(req)

            html = res.read().decode('utf-8')

            # 同步到主线程

            self.htmlGet.emit(html)

        except BaseException, e:

            self.updateHtml.emit(e.message)

        finally:

            self.ui.edtUrl.setEnabled(True)

            self.ui.btnGet.setEnabled(True)

    @QtCore.Slot(str)

    def on_edtUrl_textChanged(self, s):

        self.ui.btnGet.setEnabled(s != '')

    @QtCore.Slot(QKeyEvent)

    def edtUrl_keyPressEvent(self, event):

        if event.key() == QtCore.Qt.Key_Enter and self.ui.btnGet.isEnabled():

            self.ui.btnGet.click()

    @QtCore.Slot()

    def on_btnGet_clicked(self):

        self.ui.edtUrl.setEnabled(False)

        self.ui.btnGet.setEnabled(False)

        t = threading.Thread(target=GetHtmlDialog.get_html, args=(self, self.ui.edtUrl.text()), name='thread')

        t.start()

        # self.get_html(self.ui.edtUrl.text())

    @QtCore.Slot()

    def on_btnClose_clicked(self):

        app.exit()

    @QtCore.Slot()

    def on_btnOptions_clicked(self):

        od = OptionsDialog(self, self.ui.edtUrl.text())

        # QDialog.Accepted

        if od.exec_():

            print 'yeah!'

        else:

            print 'cancel.'

# End of main window class

if __name__ == '__main__':

    import sys

    app = QApplication(sys.argv)

    ud = GetHtmlDialog()

    ud.show()

    sys.exit(app.exec_())

显示效果如图：

工欲善其事必先利其器，熟悉本不熟的东西，本是个摸索过程，希望能更多探索它的功能