使用 Selenium/Python 旋转代理答案

【问题标题】：Rotating proxies with Selenium/Python使用 Selenium/Python 旋转代理
【发布时间】：2019-05-16 14:55:51
【问题描述】：

所以我在 GitHub 上找到了这段代码，用于收集来自：https://free-proxy-list.net/ 的 IP 并轮换它们。但是当我尝试运行它时收到一条错误消息。

我正在使用 ChromeDriver 2.41，因为我第一次收到关于 Socks 整数的不同错误。使用 ChromeDriver 2.41 已经解决了这个问题，但我仍然无法通过这个 'pxy' 参考。

另外，pycharm 提醒我'pd' 有一个重新声明的定义而没有使用。对于“pxy”和“pd”错误，我真的很感激！

这是代码：

from selenium import webdriver
from selenium.webdriver.chrome.options import DesiredCapabilities
from selenium.webdriver.common.proxy import Proxy, ProxyType

import time


co = webdriver.ChromeOptions()
co.add_argument("log-level=3")
co.add_argument("--headless")

def get_proxies(co=co):
    driver = webdriver.Chrome(chrome_options=co)
    driver.get("https://free-proxy-list.net/")

    PROXIES = []
    proxies = driver.find_elements_by_css_selector("tr[role='row']")
    for p in proxies:
        result = p.text.split(" ")

        if result[-1] == "yes":
            PROXIES.append(result[0]+":"+result[1])

    driver.close()
    return PROXIES


ALL_PROXIES = get_proxies()


def proxy_driver(PROXIES, co=co):
    prox = Proxy()

    if PROXIES:
        pxy = PROXIES[-1]
    else:
        print("--- Proxies used up (%s)" % len(PROXIES))
        PROXIES = get_proxies()

    prox.proxy_type = ProxyType.MANUAL
    prox.http_proxy = pxy
    prox.socks_proxy = pxy
    prox.ssl_proxy = pxy

    capabilities = webdriver.DesiredCapabilities.CHROME
    prox.add_to_capabilities(capabilities)

    driver = webdriver.Chrome(chrome_options=co, desired_capabilities=capabilities)

    return driver



# --- YOU ONLY NEED TO CARE FROM THIS LINE ---
# creating new driver to use proxy
pd = proxy_driver(ALL_PROXIES)

# code must be in a while loop with a try to keep trying with different proxies
running = True

while running:
    try:
        mycodehere()

        # if statement to terminate loop if code working properly
        something()

        # you 
    except:
        new = ALL_PROXIES.pop()

        # reassign driver if fail to switch proxy
        pd = proxy_driver(ALL_PROXIES)
        print("--- Switched proxy to: %s" % new)

这是我得到的错误：

Traceback (most recent call last):
  File "scripts2.py", line 65, in <module>
    pd = proxy_driver(ALL_PROXIES)
  File "scripts2.py", line 53, in proxy_driver
    prox.http_proxy = pxy
UnboundLocalError: local variable 'pxy' referenced before assignment

我有点困惑，因为我认为 'pxy' 是在 if PROXIES 下分配的？

【问题讨论】：

无法在运行时更改代理，您必须重新创建驱动程序实例

标签： python selenium selenium-webdriver proxy

【解决方案1】：

尝试更改以下行

当前代码：

if PROXIES:
    pxy = PROXIES[-1]  # script will fail if this condition not met
else:
    print("--- Proxies used up (%s)" % len(PROXIES))
    PROXIES = get_proxies()

更新代码：

# make sure to reset pxy to either null or empty
pxy = '' 
if (PROXIES is None):
    #print("--- Proxies used up (%s)" % len(PROXIES))
    PROXIES = get_proxies()
pxy = PROXIES[-1]
# I would check if pxy is empty or not before doing assignment
if (pxy!=''):
   #Then do the logic here

【讨论】：