QWebEngineView的下载功能

partner_625781186/6.QWebEngineView下载文件/browser.py

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+# v1.2
+# created
+#   by Roger
+# in 2017.1.3
+
+from PyQt5.QtCore import *
+from PyQt5.QtWidgets import *
+from PyQt5.QtGui import *
+from PyQt5.QtWebEngineWidgets import QWebEngineView
+import configparser
+
+
+import sys
+
+class MainWindow(QMainWindow):
+    
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        # 设置窗口标题
+        self.setWindowTitle('My Browser')
+        # 设置窗口图标
+        self.setWindowIcon(QIcon('icons/penguin.png'))
+        
+        # 设置窗口大小900*600
+        self.resize(750, 400)
+        self.show()
+        self.frame=1
+        # 设置浏览器
+        self.browser = MyEngineView()
+        # config = configparser.ConfigParser()
+        # config.readfp(open('url.ini'))
+        # url= config.get("URL","url")
+        url="http://www.onlinedown.net/soft/56160.htm"
+        # 指定打开界面的 URL
+        self.browser.setUrl(QUrl(url))
+        # 添加浏览器到窗口中
+        self.setCentralWidget(self.browser)
+
+        self.tray = QSystemTrayIcon() #创建系统托盘对象  
+        self.icon = QIcon('icons/back.png')  #创建图标  
+        self.tray.setIcon(self.icon)  #设置系统托盘图标  
+        self.tray.show()
+
+
+        #使用QToolBar创建导航栏，并使用QAction创建按钮
+        # 添加导航栏
+        navigation_bar = QToolBar('Navigation')
+        # 设定图标的大小
+        navigation_bar.setIconSize(QSize(16, 16))
+        #添加导航栏到窗口中
+        self.addToolBar(navigation_bar)
+
+        #QAction类提供了抽象的用户界面action，这些action可以被放置在窗口部件中
+        # 添加前进、后退、停止加载和刷新的按钮
+        back_button = QAction(QIcon('icons/back.png'), 'Back', self)
+        next_button = QAction(QIcon('icons/next.png'), 'Forward', self)
+        stop_button = QAction(QIcon('icons/cross.png'), 'stop', self)
+        reload_button = QAction(QIcon('icons/renew.png'), 'reload', self)
+       
+        
+        back_button.triggered.connect(self.browser.back)
+        next_button.triggered.connect(self.browser.forward)
+        stop_button.triggered.connect(self.browser.stop)
+        reload_button.triggered.connect(self.browser.reload)
+  
+        # 将按钮添加到导航栏上
+        navigation_bar.addAction(back_button)
+        navigation_bar.addAction(next_button)
+        navigation_bar.addAction(stop_button)
+        navigation_bar.addAction(reload_button)
+        #添加URL地址栏
+        self.urlbar = QLineEdit()
+        self.urlbar.setText(url)
+        # 让地址栏能响应回车按键信号
+        self.urlbar.returnPressed.connect(self.navigate_to_url)
+
+        navigation_bar.addSeparator()
+        navigation_bar.addWidget(self.urlbar)
+
+        #让浏览器相应url地址的变化
+        self.browser.urlChanged.connect(self.renew_urlbar)
+
+    def navigate_to_url(self):
+        q = QUrl(self.urlbar.text())
+        if q.scheme() == '':
+            q.setScheme('http')
+        self.browser.setUrl(q)
+
+    def renew_urlbar(self, q):
+        # 将当前网页的链接更新到地址栏
+        self.urlbar.setText(q.toString())
+        self.urlbar.setCursorPosition(0)
+
+class MyEngineView(QWebEngineView):
+    '''
+    浏览器类。
+    '''
+    def __init__(self, parent=None, ):
+        super(MyEngineView, self).__init__(parent)
+        self.parent = parent
+        #有下载信号发起
+        self.page().profile().downloadRequested.connect(self.on_downloadRequested)
+
+    def createWindow(self,  type):
+        '''
+        实现点击跳转链接。
+        '''
+        return self  
+
+    #以下函数里的 ：后为注释，无实际作用
+
+        #下载信号连接到的槽
+    def on_downloadRequested(self, download : "QWebEngineDownloadItem" ):
+        # download是QWebEngineDownloadItem对象；
+        download.downloadProgress.connect(self._downloadProgress)
+        download.finished.connect(self._finished)
+
+        #下载文件的保存路径及文件名
+        old_path = download.path()
+        suffix = QFileInfo(old_path).suffix()
+        #下载文件类型
+        filttype = download.mimeType()
+        #后缀切割
+        unkonw_suffix = filttype.split(r'/')[-1]
+        path, _ =QFileDialog.getSaveFileName(self, "Save File", old_path,  "*."+unkonw_suffix + ";;" + "*."+suffix )
+
+        print(old_path, suffix)
+
+        if path!="":
+            download.setPath(path)
+            download.accept()
+
+    def _downloadProgress(self , bytesReceived:"qint64", bytesTotal:"qint64"):
+        # bytesReceived 当前下载值 ； bytesTotal 文件总大小值
+        self.bytesReceived = bytesReceived
+        self.bytesTotal = bytesTotal
+        print(bytesReceived , bytesTotal )
+
+    def _finished(self):
+        print("下载完成")
+
+if __name__ == "__main__":
+    # 创建应用
+    app = QApplication(sys.argv)
+    # 创建主窗口
+    window = MainWindow()
+    # 显示窗口
+    window.show()
+    # 运行应用，并监听事件
+    app.exec_()    

partner_625781186/6.QWebEngineView下载文件/readme.md

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+# QWebEngineView下载文件
+
+## QT官方自带例子 - 额 官方上没有 ，在本地 Examples\Qt-5.9.1\webenginewidgets\demobrowser 文件夹下。
+
+![截图2](ScreenShot/1.png)
+
+#QWebEngineView的下载请求信号
+QWebEngineView().page().profile().downloadRequested.connect(self.on_downloadRequested)
+
+#QWebEngineDownloadItem
+下载过程的信号
+QWebEngineDownloadItem().downloadProgress.connect(self._downloadProgress)
+下载结束的信号
+QWebEngineDownloadItem().finished.connect(self._finished)
+
+## 参考文献
+https://stackoverflow.com/questions/50164712/how-to-open-download-file-dialog-with-qwebengineview-on-pyqt5
+https://stackoverflow.com/questions/38812787/how-to-handle-downloads-in-qwebengine