标签：
转载自：http://www.python_tab.com/html/2014/pythonweb_0326/724.html
在爬取网站内容的时候，最常遇到的问题是：网站对IP有限制，会有防抓取功能，最好的办法就是IP轮换抓取（加代理）
下面来说一下Scrapy如何配置代理，进行抓取
1.在Scrapy工程下新建“middlewares.py”
# Importing base64 library because we‘ll need it ONLY in case if the proxy we are going to use requires authentication import base64 # Start your middleware class class ProxyMiddleware(object): # overwrite process request def process_request(self, request, spider): # Set the location of the proxy request.meta[‘proxy‘] = "http://YOUR_PROXY_IP:PORT" # Use the following lines if your proxy requires authentication proxy_user_pass = "USERNAME:PASSWORD" # setup basic authentication for the proxy encoded_user_pass = base64.encodestring(proxy_user_pass) request.headers[‘Proxy-Authorization‘] = ‘Basic ‘ + encoded_user_pass
2.在项目配置文件里(./pythontab/settings.py)添加
DOWNLOADER_MIDDLEWARES = { ‘scrapy.contrib.downloadermiddleware.httpproxy.HttpProxyMiddleware‘: 110, ‘pythontab.middlewares.ProxyMiddleware‘: 100, }
完毕。
标签：
原文地址：http://www.cnblogs.com/zl0372/p/Scrapy_proxy.html
