需求

selenium爬虫时需要添加IP代理，而IP代理使用的是账密认证，这时使用下面普通的添加代理方式是无法获取到请求页面

ChromeOption.add_argument("--proxy-server=http://ip:port")

需要使用以下代码，提供格式为user:password:IP_ADDRESS:port的代理即可

import os
import zipfile

from selenium import webdriver


manifest_json = """
{
    "version": "1.0.0",
    "manifest_version": 2,
    "name": "Chrome Proxy",
    "permissions": [
        "proxy",
        "tabs",
        "unlimitedStorage",
        "storage",
        "<all_urls>",
        "webRequest",
        "webRequestBlocking"
    ],
    "background": {
        "scripts": ["background.js"]
    },
    "minimum_chrome_version":"22.0.0"
}
"""

def get_background_js(proxy_user, proxy_pass, proxy_host, proxy_port):
    print(proxy_user, proxy_pass, proxy_host, proxy_port)
    return """var config = {
        mode: "fixed_servers",
        rules: {
        singleProxy: {
            scheme: "http",
            host: "%s",
            port: parseInt(%s)
        },
        bypassList: ["localhost"]
        }
    };

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

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

chrome.webRequest.onAuthRequired.addListener(
            callbackFn,
            {urls: ["<all_urls>"]},
            ['blocking']
);
""" % (proxy_host, proxy_port, proxy_user, proxy_pass)


def get_chromedriver(proxy=False, user_agent=None):
    chrome_options = webdriver.ChromeOptions()
    if proxy:
        pluginfile = 'proxy_auth_plugin.zip'

        with zipfile.ZipFile(pluginfile, 'w') as zp:
            zp.writestr("manifest.json", manifest_json)
            zp.writestr("background.js", get_background_js(*proxy.split(":")))
        chrome_options.add_extension(pluginfile)
    if user_agent:
        chrome_options.add_argument(' user-agent=%s' % user_agent)
    driver = webdriver.Chrome(
        chrome_options=chrome_options)
    return driver