Question

我想在我的pyside app中支持自定义协议，但没有成功。到目前为止我试过了：

class MainWindow(QWebView):
    def __init__(self, parent=None):
        oldManager = self.page().networkAccessManager()
        self.page().setNetworkAccessManager(NetworkAccessManager(self, oldManager))

#in another file
class NetworkAccessManager(QNetworkAccessManager):
    def __init__(self, parent, oldManager):
        QNetworkAccessManager.__init__(self)
        self.oldManager = oldManager
        self.setCache(oldManager.cache())
        self.setCookieJar(oldManager.cookieJar())
        self.setProxy(oldManager.proxy())
        self.setProxyFactory(oldManager.proxyFactory())
        print('There')

    def createRequest(self, operation, request, data):
        print('And there')

这导致Windows下的segmentation fault。我看到了this：

PySide.QtWebKit.QWebPage使用它后，目前不支持更改网络访问管理器。

但我不知道在这种情况下它会用在哪里。我尝试在设置网络管理器后设置网页对象分段错误消失了。

PS：控制台内没有显示任何print语句。

Answer 1

如果createRequest没有返回回复，那么它就会崩溃。所以完整的解决方案是：

class MainWindow(QWebView):
    def __init__(self, parent=None):
        oldManager = self.page().networkAccessManager()
        self.setPage(DebugWebPage()) #if you want to set a custom page
        self.page().setNetworkAccessManager(NetworkAccessManager(self))

class NetworkAccessManager(QNetworkAccessManager):
    def __init__(self, parent):
        QNetworkAccessManager.__init__(self)

    def createRequest(self, operation, request, data):
        if request.url().scheme() != 'page':
            return QNetworkAccessManager.createRequest(self, operation, request, data)

        if operation == self.GetOperation:
            # Handle page:// URLs separately by creating custom
            # QNetworkReply objects.
            reply = PageReply(self, request.url(), self.GetOperation)
            print('here')
            return reply
        else:
            return QNetworkAccessManager.createRequest(self, operation, request, data)

class PageReply(QNetworkReply):
    def __init__(self, parent, url, operation):
        QNetworkReply.__init__(self, parent)
        self.content = '<html><head><title>Test</title></head><body>This is a test.</body></html>'
        self.offset = 0

        self.setHeader(QNetworkRequest.ContentTypeHeader, 'text/html; charset=utf-8')
        self.setHeader(QNetworkRequest.ContentLengthHeader, len(self.content))
        QTimer.singleShot(0, self, SIGNAL('readyRead()'))
        QTimer.singleShot(0, self, SIGNAL('finished()'))
        self.open(self.ReadOnly | self.Unbuffered)
        self.setUrl(url)

    def abort(self):
        pass

    def bytesAvailable(self):
        return len(self.content) - self.offset + QNetworkReply.bytesAvailable(self)

    def isSequential(self):
        return True

    def readData(self, maxSize):
        if self.offset < len(self.content):
            end = min(self.offset + maxSize, len(self.content))
            data = self.content[self.offset:end]
            self.offset = end
            return data

注意：我真的不知道为什么，但是当脚本在网络管理器中或者回复导致分段错误时出现任何错误。

基于this进行一些修正。

Pyside qwebview自定义协议

1 个答案: