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我正在将应用程序从 PyQt4 迁移到 PyQt5。

我试图覆盖请求拦截器,但这由于某种奇怪的原因不起作用,这没有被拾起。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)
4

1 回答 1

3

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

QWebEnginePage::QWebEnginePage(QObject *parent = Q_NULLPTR)

构造一个带有 parent parent 的空 QWebEnginePage。

而不是第二个构造函数:

QWebEnginePage::QWebEnginePage(QWebEngineProfile *profile, QObject *parent = Q_NULLPTR)

在具有父级的 Web 引擎配置文件配置文件中构造一个空的 Web 引擎页面。

如果配置文件不是默认配置文件,则调用者必须确保配置文件与页面一样长时间保持活动状态。

这个函数是在 Qt 5.5 中引入的。

解决方案是传递 2 个参数:配置文件和父级,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_())
于 2018-06-10T18:19:59.563 回答