我将应用程序从PyQt4迁移到PyQt5。

我试图覆盖请求拦截器,但是由于某些奇怪的原因而无法正常工作,这没有得到解决。我正在使用PyQt == 5.10.0

class WebEngineUrlRequestInterceptor(QWebEngineUrlRequestInterceptor):
    def __init__(self, parent=None):
        super().__init__(parent)

    def interceptRequest(self, info):
        # info.setHttpHeader("X-Frame-Options", "ALLOWALL")
        print("test")
        print(info.requestUrl())
class MyWebEnginePage(QWebEnginePage):

    # adblocker = Filter(open('easylist.txt', encoding="utf8"))

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

    def acceptNavigationRequest(self, url, _type, isMainFrame):
        # urlString = url.toString()
        # resp = False
        # resp = WebPage.adblocker.match(url.toString())
        #
        # if resp:
        #     print("Blocking url --- "+url.toString())
        #     return False
        # else:
        #     print("TYPE", _type)
        #     return True

         print(url)

         return QWebEnginePage.acceptNavigationRequest(self, url, _type, isMainFrame)


这就是我加载浏览器的方式

# init browser
browser = QWebEngineView()
# init profile
profile = QWebEngineProfile()
# add interceptor to profile
interceptor = WebEngineUrlRequestInterceptor()
profile.setRequestInterceptor(interceptor)
# init page setting profile
page = MyWebEnginePage(profile)
page.setUrl(qurl)
browser.setPage(page)

最佳答案

问题是由使用MyWebEnginePage的构造函数引起的,因为您已经使用构造函数放置了它:


  QWebEnginePage :: QWebEnginePage(QObject * parent = Q_NULLPTR)
  
  构造一个带有父parent的空QWebEnginePage。


代替第二个构造函数:


  QWebEnginePage :: QWebEnginePage(QWebEngineProfile * profile,QObject
  *父= Q_NULLPTR)
  
  在Web引擎配置文件配置文件中构造一个空的Web引擎页面
  与父母亲。
  
  如果配置文件不是默认配置文件,则调用者必须确保
  该个人资料会在页面中保持有效状态。
  
  此功能在Qt 5.5中引入。


解决方案是传递两个参数:概要文件和父项,同样,如果您不打算在构造函数中添加任何内容,则无需覆盖它,如下所示:

import sys

from PyQt5.QtCore import QUrl
from PyQt5.QtWidgets import QApplication
from PyQt5.QtWebEngineCore import QWebEngineUrlRequestInterceptor
from PyQt5.QtWebEngineWidgets import QWebEngineView, QWebEnginePage, QWebEngineProfile


class WebEngineUrlRequestInterceptor(QWebEngineUrlRequestInterceptor):
    def interceptRequest(self, info):
        # info.setHttpHeader("X-Frame-Options", "ALLOWALL")
        print("interceptRequest")
        print(info.requestUrl())

class MyWebEnginePage(QWebEnginePage):
    def acceptNavigationRequest(self, url, _type, isMainFrame):
        print("acceptNavigationRequest")
        print(url)
        return QWebEnginePage.acceptNavigationRequest(self, url, _type, isMainFrame)

if __name__ == "__main__":
    app = QApplication(sys.argv)
    browser = QWebEngineView()
    interceptor = WebEngineUrlRequestInterceptor()
    profile = QWebEngineProfile()
    profile.setRequestInterceptor(interceptor)
    page = MyWebEnginePage(profile, browser)
    page.setUrl(QUrl("https://stackoverflow.com/questions/50786186/qwebengineurlrequestinterceptor-not-working"))
    browser.setPage(page)
    browser.show()
    sys.exit(app.exec_())

10-06 05:20