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



該代碼片段來自于: http://www.sharejs.com/codes/python/8309</pre> 2.在項目配置文件里(./project_name/settings.py)添加
DOWNLOADER_MIDDLEWARES = {
    'scrapy.contrib.downloadermiddleware.httpproxy.HttpProxyMiddleware': 110,
    'project_name.middlewares.ProxyMiddleware': 100,
}

</pre> 只要兩步，現在請求就是通過代理的了。測試一下^_^
from scrapy.spider import BaseSpider
from scrapy.contrib.spiders import CrawlSpider, Rule
from scrapy.http import Request

class TestSpider(CrawlSpider):
    name = "test"
    domain_name = "whatismyip.com"

# The following url is subject to change, you can get the last updated one from here :
# http://www.whatismyip.com/faq/automation.asp
start_urls = ["http://xujian.info"]

def parse(self, response):
    open('test.html', 'wb').write(response.body)

</pre>