python - Scrapy with Privoxy and Tor: how to renew IP

Question

I am dealing with Scrapy, Privoxy and Tor. I have all installed and properly working. But Tor connects with the same IP everytime, so I can easily be banned. Is it possible to tell Tor to reconnect each X seconds or connections?

Thanks!

EDIT about the configuration: For the user agent pool i did this: http://tangww.com/2013/06/UsingRandomAgent/ (I had to put a _ init _.py file as it is said in the comments), and for the Privoxy and Tor I followed http://www.andrewwatters.com/privoxy/ (I had to create the private user and private group manually with the terminal). It worked :)

My spider is this:

from scrapy.contrib.spiders import CrawlSpider
from scrapy.selector import Selector
from scrapy.http import Request

class YourCrawler(CrawlSpider):
    name = "spider_name"
    start_urls = [
    'https://example.com/listviews/titles.php',
    ]
    allowed_domains = ["example.com"]

    def parse(self, response):
        # go to the urls in the list
        s = Selector(response)
        page_list_urls = s.xpath('///*[@id="tab7"]/article/header/h2/a/@href').extract()
        for url in page_list_urls:
            yield Request(response.urljoin(url), callback=self.parse_following_urls, dont_filter=True)

        # Return back and go to bext page in div#paginat ul li.next a::attr(href) and begin again
        next_page = response.css('ul.pagin li.presente ~ li a::attr(href)').extract_first()
        if next_page is not None:
            next_page = response.urljoin(next_page)
            yield Request(next_page, callback=self.parse)

    # For the urls in the list, go inside, and in div#main, take the div.ficha > div.caracteristicas > ul > li
    def parse_following_urls(self, response):
        #Parsing rules go here
        for each_book in response.css('main#main'):
            yield {
                'editor': each_book.css('header.datos1 > ul > li > h5 > a::text').extract(),
            }

In settings.py I have an user agent rotation and privoxy:

DOWNLOADER_MIDDLEWARES = {
        #user agent
        'scrapy.contrib.downloadermiddleware.useragent.UserAgentMiddleware' : None,
        'spider_name.comm.rotate_useragent.RotateUserAgentMiddleware' :400,
        #privoxy
        'scrapy.downloadermiddlewares.httpproxy.HttpProxyMiddleware': 110,
        'spider_name.middlewares.ProxyMiddleware': 100
    }

In middlewares.py I added:

class ProxyMiddleware(object):
    def process_request(self, request, spider):
        request.meta['proxy'] = 'http://127.0.0.1:8118'
        spider.log('Proxy : %s' % request.meta['proxy'])

And I think that's all…

EDIT II ---

Ok, I changed my middlewares.py file as in the blog @Tomá? Linhart said from:

class ProxyMiddleware(object):
    def process_request(self, request, spider):
        request.meta['proxy'] = 'http://127.0.0.1:8118'
        spider.log('Proxy : %s' % request.meta['proxy'])

To

from stem import Signal
from stem.control import Controller

class ProxyMiddleware(object):
    def process_request(self, request, spider):
        request.meta['proxy'] = 'http://127.0.0.1:8118'
        spider.log('Proxy : %s' % request.meta['proxy'])

    def set_new_ip():
        with Controller.from_port(port=9051) as controller:
            controller.authenticate(password='tor_password')
            controller.signal(Signal.NEWNYM)

But now is really slow, and doesn't appear to change the ip… I did it ok or is something wrong?

Answer 1

This blog post might help you a bit as it deals with the same issue.

EDIT: Based on concrete requirement (new IP for each request or after N requests), put appropriate call to set_new_ip in process_request method of the middleware. Note, however, that call to set_new_ip function doesn't have to always ensure new IP (there's a link to the FAQ with explanation).

EDIT2: The module with ProxyMiddleware class would look like this:

from stem import Signal
from stem.control import Controller

def _set_new_ip():
    with Controller.from_port(port=9051) as controller:
        controller.authenticate(password='tor_password')
        controller.signal(Signal.NEWNYM)

class ProxyMiddleware(object):
    def process_request(self, request, spider):
        _set_new_ip()
        request.meta['proxy'] = 'http://127.0.0.1:8118'
        spider.log('Proxy : %s' % request.meta['proxy'])