python：使用代理IP进行scrapy

Question

I want to use proxy IP for web scraping using scrapy. In order to use a proxy I set the environment variable http_proxy as mentioned in the documentation.

$ export http_proxy=http://proxy:port

To test whether the change of IP worked, I created a new spider with the name test :

from scrapy.spider import BaseSpider
from scrapy.contrib.spiders import CrawlSpider, Rule

class TestSpider(CrawlSpider):
    name = "test"
    domain_name = "whatismyip.com"
    start_urls = ["http://whatismyip.com"]

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

but if I run this spider the check_ip.html do not show the IP as specified in the environment variable rather it shows the original IP as it was before crawling.

What is the problem ? is there any alternative way that I can check whether I am using a proxy IP or not? or is there any other way to use a proxy IP ?

Answer 1

Edit settings.py in your current project and make sure you have HttpProxyMiddleware enabled:

DOWNLOADER_MIDDLEWARES = { 
 #you need this line in order to scrap through a proxy/proxy list
'scrapy.contrib.downloadermiddleware.httpproxy.HttpProxyMiddleware': 110,
}