背景，使用python3 + selenium

1. 先定义一个方法，这里主要用到了chrome插件的功能，利用这个插件来放进代理内容。

def create_proxy_auth_extension(proxy_host, proxy_port,proxy_username, proxy_password, scheme='http'):
        manifest_json = """
        {
            "version": "1.0.0",
            "manifest_version": 2,
            "name": "Dobel Proxy",
            "permissions": [
                "proxy",
                "tabs",
                "unlimitedStorage",
                "storage",
                "<all_urls>",
                "webRequest",
                "webRequestBlocking"
            ],
            "background": {
                "scripts": ["background.js"]
            },
            "minimum_chrome_version":"22.0.0"
        }
        """

        background_js = string.Template(
            """
            var config = {
                mode: "fixed_servers",
                rules: {
                    singleProxy: {
                        scheme: "${scheme}",
                        host: "${host}",
                        port: parseInt(${port})
                    },
                    bypassList: ["foobar.com"]
                }
            };

            chrome.proxy.settings.set({value: config, scope: "regular"}, function() {});

            function callbackFn(details) {
                return {
                    authCredentials: {
                        username: "${username}",
                        password: "${password}"
                    }
                };
            }

            chrome.webRequest.onAuthRequired.addListener(
                callbackFn,
                {urls: ["<all_urls>"]},
                ['blocking']
            );
            """
        ).substitute(
            host=proxy_host,
            port=proxy_port,
            username=proxy_username,
            password=proxy_password,
            scheme=scheme,
        )

        with zipfile.ZipFile(plugin_path, 'w') as zp:
            zp.writestr("manifest.json", manifest_json)
            zp.writestr("background.js", background_js)

        return plugin_path

2. 开始使用

chrome_options.add_extension(self.create_proxy_auth_extension('代理IP','代理端口','用户名','密码'))

3. 然后可能遇到下面的问题

unknown error: page could not be found: chrome-extension://fnjdlheghigmlmjhcnncmedpadonioob/_generated_background_page.html

表示在无头浏览器下面不能进行这个操作，然后继续来解决这个问题。

4. 让浏览器在非无头浏览器下面工作

要实现这个效果，就开起来一个虚拟桌面
安装虚拟桌面工具

yum install Xvfb -y
yum install xdpyinfo
pip3 install pyvirtualdisplay

启动webdriver前先把这个虚拟桌面启动起来

from selenium import webdriver
from pyvirtualdisplay import Display
 
display = Display(visible=0, size=(800, 800))
display.start()

然后这个问题应该得以解决。