Random proxy middleware for Scrapy (http://scrapy.org/)

Processes Scrapy requests using a random proxy from list to avoid IP ban and improve crawling speed.

Get your proxy list from sites like http://www.hidemyass.com/ (copy-paste into text file and reformat to http://host:port format)

settings.py

# Retry many times since proxies often fail
RETRY_TIMES = 10
# Retry on most error codes since proxies fail for different reasons
RETRY_HTTP_CODES = [500, 503, 504, 400, 403, 404, 408]

DOWNLOADER_MIDDLEWARES = {
    'scrapy.contrib.downloadermiddleware.retry.RetryMiddleware': 90,
    # Fix path to this module
    'yourspider.randomproxy.RandomProxy': 100,
    'scrapy.contrib.downloadermiddleware.httpproxy.HttpProxyMiddleware': 110,
}

# Proxy list containing entries like
# http://host1:port
# http://username:password@host2:port
# http://host3:port
# ...
PROXY_LIST = '/path/to/proxy/list.txt'

Your spider

In each callback ensure that proxy /really/ returned your target page by checking for site logo or some other significant element. If not - retry request with dont_filter=True

if not hxs.select('//get/site/logo'):
    yield Request(url=response.url, dont_filter=True)