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拦截请求内容
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892768447 committed Feb 18, 2020
1 parent 072f5f6 commit 0534fb8
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82 changes: 82 additions & 0 deletions QWebEngineView/BlockRequestData.py
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#!/usr/bin/env python
# -*- coding: utf-8 -*-

"""
Created on 2020年2月18日
@author: Irony
@site: https://pyqt5.com https://github.com/892768447
@email: [email protected]
@file: QWebEngineView.BlockRequestData
@description: 拦截请求内容
"""
from PyQt5.QtCore import QUrl, QFile, QIODevice
from PyQt5.QtWebEngineCore import QWebEngineUrlSchemeHandler,\
QWebEngineUrlRequestInterceptor, QWebEngineUrlScheme # @UnresolvedImport
from PyQt5.QtWebEngineWidgets import QWebEngineView, QWebEngineProfile


__Author__ = 'Irony'
__Copyright__ = 'Copyright (c) 2019'
__Version__ = 'Version 1.0'


# 自定义url协议头
class UrlSchemeHandler(QWebEngineUrlSchemeHandler):

def requestStarted(self, job):
url = job.requestUrl().toString()
if url == 'myurl://png':
file = QFile('Data/app.png', job)
file.open(QIODevice.ReadOnly)
job.reply(b'image/png', file)

# 请求拦截器


class RequestInterceptor(QWebEngineUrlRequestInterceptor):

def interceptRequest(self, info):
url = info.requestUrl().toString()
# 这里演示只是拦截所有png图片,可自由发挥比如拦截js文件,修改后再返回
if url.endswith('.png'):
# 原理在于重定向到自己的url协议里
info.redirect(QUrl('myurl://png'))


class Window(QWebEngineView):

def __init__(self, *args, **kwargs):
super(Window, self).__init__(*args, **kwargs)
self.resize(800, 600)

# 首先获取默认的url协议
h1 = QWebEngineUrlScheme.schemeByName(b'http')
h2 = QWebEngineUrlScheme.schemeByName(b'https')

# 这里需要修改增加本地文件和跨域支持
CorsEnabled = 0x80 # 5.14才增加
h1.setFlags(h1.flags() |
QWebEngineUrlScheme.SecureScheme |
QWebEngineUrlScheme.LocalScheme |
QWebEngineUrlScheme.LocalAccessAllowed |
CorsEnabled)
h2.setFlags(h2.flags() |
QWebEngineUrlScheme.SecureScheme |
QWebEngineUrlScheme.LocalScheme |
QWebEngineUrlScheme.LocalAccessAllowed |
CorsEnabled)

# 安装url拦截器和自定义url协议处理
de = QWebEngineProfile.defaultProfile() # @UndefinedVariable
de.setRequestInterceptor(RequestInterceptor(self))
de.installUrlSchemeHandler(b'myurl', UrlSchemeHandler(self))


if __name__ == '__main__':
import sys
from PyQt5.QtWidgets import QApplication
app = QApplication(sys.argv)
w = Window()
w.show()
w.load(QUrl('https://www.baidu.com/'))
sys.exit(app.exec_())
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11 changes: 10 additions & 1 deletion QWebEngineView/README.md
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- [网页整体截图](#3网页整体截图)
- [同网站不同用户](#4同网站不同用户)
- [拦截请求](#5拦截请求)
- [拦截请求内容](#6拦截请求内容)

## 1、获取Cookie
[运行 GetCookie.py](GetCookie.py)
Expand Down Expand Up @@ -43,4 +44,12 @@

通过`QWebEngineUrlRequestInterceptor`中的`interceptRequest`方法对每个请求做拦截过滤

![BlockRequest](ScreenShot/BlockRequest.gif)
![BlockRequest](ScreenShot/BlockRequest.gif)

## 6、拦截请求内容
[运行 BlockRequestData.py](BlockRequestData.py)

这里用了一个投巧的办法,原理是先通过`QWebEngineUrlRequestInterceptor`中的`interceptRequest`方法对每个请求做拦截过滤,
发现目标url后重定向到`QWebEngineUrlSchemeHandler`实现的自定义协议头返回数据

![BlockRequestData](ScreenShot/BlockRequestData.png)
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1 change: 1 addition & 0 deletions README.md
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Expand Up @@ -139,6 +139,7 @@ https://pyqt.site 论坛是专门针对PyQt5学习和提升开设的网站,分
- [网页整体截图](QWebEngineView/ScreenShotPage.py)
- [同网站不同用户](QWebEngineView/SiteDiffUser.py)
- [拦截请求](QWebEngineView/BlockRequest.py)
- [拦截请求内容](QWebEngineView/BlockRequestData.py)
- [浏览器下载文件](Test/partner_625781186/6.QWebEngineView下载文件)
- [打印网页](Test/partner_625781186/17_打印预览qwebengineview)

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