如何从内存将swf文件加载到QWebEngineView

问题描述

我正在尝试使用QWebEngineView加载Flash（SWF）文件 我想从内存中加载SWF文件，但到目前为止只能从URL加载

data是urlopen（urllib）结果的字节数组。 self.webview是QWebEngineView的实例。

self.webview.load(QtCore.QUrl(url))              # works
self.webview.setContent(QtCore.QByteArray(data)) # does not work

使用swf运行的URL。从字节数组加载会导致页面空白或页面乱码。没有错误显示。

我正在将pyqt5与python3配合使用

解决方法

似乎您无法直接传递原始数据，因此一种解决方法是创建一个自定义QWebEngineUrlSchemeHandler，该URL通过URL提供资源：

from PyQt5 import QtCore,QtWidgets,QtWebEngineCore,QtWebEngineWidgets


class CustomUrlSchemeHandler(QtWebEngineCore.QWebEngineUrlSchemeHandler):
    SCHEMENAME = b"custom"

    def __init__(self,parent=None):
        super().__init__(parent)
        self._datas = dict()

    def add_data(self,path,mimetype,data):
        self._datas[path] = mimetype,data
        url = QtCore.QUrl()
        url.setScheme(self.SCHEMENAME.decode())
        url.setPath(path)
        return url

    def requestStarted(self,job):
        requestMethod = job.requestMethod()
        if requestMethod != b"GET":
            job.fail(QtWebEngineCore.QWebEngineUrlRequestJob.RequestDenied)
            return

        requestUrl = job.requestUrl()
        requestPath = requestUrl.path()
        value = self._datas.get(requestPath)
        if value is not None:
            mimetype,data = value
            buf = QtCore.QBuffer(parent=self)
            job.destroyed.connect(buf.deleteLater)
            buf.open(QtCore.QIODevice.WriteOnly)
            buf.write(data)
            buf.close()
            job.reply(mimetype.encode(),buf)
        else:
            job.fail(QtWebEngineCore.QWebEngineUrlRequestJobUrlNotFound)

    @classmethod
    def registerUrlScheme(cls):
        scheme = QtWebEngineCore.QWebEngineUrlScheme(cls.SCHEMENAME)
        QtWebEngineCore.QWebEngineUrlScheme.registerScheme(scheme)


if __name__ == "__main__":

    import sys
    import urllib.request

    data = b""
    with urllib.request.urlopen(
        "https://condor.depaul.edu/sjost/hci430/flash-examples/swf/wheel.swf"
    ) as response:
        data = response.read()

    CustomUrlSchemeHandler.registerUrlScheme()

    app = QtWidgets.QApplication(sys.argv)

    settings = QtWebEngineWidgets.QWebEngineSettings.defaultSettings()
    settings.setAttribute(QtWebEngineWidgets.QWebEngineSettings.PluginsEnabled,True)

    view = QtWebEngineWidgets.QWebEngineView()

    handler = CustomUrlSchemeHandler()
    view.page().profile().installUrlSchemeHandler(handler.SCHEMENAME,handler)

    view.resize(640,480)
    view.show()

    url = handler.add_data("test.swg","application/x-shockwave-flash",data)
    view.load(url)

    sys.exit(app.exec_())