隧道转发的爬虫代理随机数（2）

Proxy-Tunnel保持IP不变：
    #! -*- encoding:utf-8 -*-
    import requests
    import random
    import requests.adapters

    # 要访问的目标页面
    targetUrlList = [
        "https://httpbin.org/ip",
        "https://httpbin.org/headers",
        "https://httpbin.org/user-agent",
    ]

    # 代理服务器(产品官网 www.16yun.cn)
    proxyHost = "t.16yun.cn"
    proxyPort = "31111"

    # 代理验证信息
    proxyUser = "username"
    proxyPass = "password"

    proxyMeta = "http://%(user)s:%(pass)s@%(host)s:%(port)s" % {
        "host": proxyHost,
        "port": proxyPort,
        "user": proxyUser,
        "pass": proxyPass,
    }

    # 设置 http和https访问都是用HTTP代理
    proxies = {
        "http": proxyMeta,
        "https": proxyMeta,
    }

    #  设置IP切换头
    tunnel = random.randint(1, 10000)
    headers = {"Proxy-Tunnel": str(tunnel)}


    class HTTPAdapter(requests.adapters.HTTPAdapter):
        def proxy_headers(self, proxy):
            headers = super(HTTPAdapter, self).proxy_headers(proxy)
            if hasattr(self, 'tunnel'):
                headers['Proxy-Tunnel'] = self.tunnel
            return headers


    # 访问三次网站，使用相同的tunnel标志，均能够保持相同的外网IP
    for i in range(3):
        s = requests.session()

        a = HTTPAdapter()

        #  设置IP切换头
        a.tunnel = tunnel
        s.mount('https://', a)

        for url in targetUrlList:
            r = s.get(url, proxies=proxies)
            print r.text