python爬虫之Scrapy 使用代理配置——乾颐堂

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# 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

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DOWNLOADER_MIDDLEWARES = {

    ‘scrapy.contrib.downloadermiddleware.httpproxy.HttpProxyMiddleware‘: 110,

    ‘pythontab.middlewares.ProxyMiddleware‘: 100,

}