Setting Scrapy proxy middleware to rotate on each request

Question

This question necessarily comes in two forms, because I don\'t know the better route to a solution.

A site I\'m crawling kicks me to a redirected \"User Blocked\" pa

Answer 1

yesterday I had similar task with proxy and protection against DDoS. ( I've parsed a site ) The idea is in random.choice. Every request has a chance of changing IP. Scrapy uses Tor and telnetlib3. You need to configure ControlPort password.

from scrapy import log
from settings import USER_AGENT_LIST

import random
import telnetlib
import time


# 15% ip change
class RetryChangeProxyMiddleware(object):
    def process_request(self, request, spider):
        if random.choice(xrange(1,100)) <= 15:
            log.msg('Changing proxy')
            tn = telnetlib.Telnet('127.0.0.1', 9051)
            tn.read_until("Escape character is '^]'.", 2)
            tn.write('AUTHENTICATE "<PASSWORD HERE>"\r\n')
            tn.read_until("250 OK", 2)
            tn.write("signal NEWNYM\r\n")
            tn.read_until("250 OK", 2)
            tn.write("quit\r\n")
            tn.close()
            log.msg('>>>> Proxy changed. Sleep Time')
            time.sleep(10)



# 30% useragent change
class RandomUserAgentMiddleware(object):
    def process_request(self, request, spider):
        if random.choice(xrange(1,100)) <= 30:
            log.msg('Changing UserAgent')
            ua  = random.choice(USER_AGENT_LIST)
            if ua:
                request.headers.setdefault('User-Agent', ua)
            log.msg('>>>> UserAgent changed')