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# -*- coding: utf-8 -*-
# Define here the models for your spider middleware
#
# See documentation in:
# http://doc.scrapy.org/en/latest/topics/spider-middleware.html
import random
import base64
from settings import PROXIES
from scrapy import signals
import urllib
import time
class RandomUserAgent(object):
"""Randomly rotate user agents based on a list of predefined ones"""
def __init__(self, agents):
self.agents = agents
@classmethod
def from_crawler(cls, crawler):
return cls(crawler.settings.getlist('USER_AGENTS'))
def process_request(self, request, spider):
#print "**************************" + random.choice(self.agents)
request.headers.setdefault('User-Agent', random.choice(self.agents))
class ProxyMiddleware(object):
def process_request(self, request, spider):
apiUrl = "http://api.ip.data5u.com/dynamic/get.html?order=08903ff28b3c5147a042d2585211e257";
try:
res = urllib.urlopen(apiUrl).read().strip("\n");
ips = res.split("\n");
proxy = random.choice(ips);
request.meta['proxy'] = "http://%s" % proxy
print "**************************"+ proxy +"**************************"
time.sleep(2)
except Exception as e:
print(e)
class CqfangSpiderMiddleware(object):
# Not all methods need to be defined. If a method is not defined,
# scrapy acts as if the spider middleware does not modify the
# passed objects.
@classmethod
def from_crawler(cls, crawler):
# This method is used by Scrapy to create your spiders.
s = cls()
crawler.signals.connect(s.spider_opened, signal=signals.spider_opened)
return s
def process_spider_input(response, spider):
# Called for each response that goes through the spider
# middleware and into the spider.
# Should return None or raise an exception.
return None
def process_spider_output(response, result, spider):
# Called with the results returned from the Spider, after
# it has processed the response.
# Must return an iterable of Request, dict or Item objects.
for i in result:
yield i
def process_spider_exception(response, exception, spider):
# Called when a spider or process_spider_input() method
# (from other spider middleware) raises an exception.
# Should return either None or an iterable of Response, dict
# or Item objects.
pass
def process_start_requests(start_requests, spider):
# Called with the start requests of the spider, and works
# similarly to the process_spider_output() method, except
# that it doesn’t have a response associated.
# Must return only requests (not items).
for r in start_requests:
yield r
def spider_opened(self, spider):
spider.logger.info('Spider opened: %s' % spider.name)
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