scrapy 爬虫代理ip，及免费ip分享

settings文件

DOWNLOADER_MIDDLEWARES = {   'Suning.middlewares.SuningDownloaderMiddleware': 543
}

USER_AGENTS = [
"Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Win64; x64; Trident/5.0; .NET CLR 3.5.30729; .NET CLR 3.0.30729; .NET CLR 2.0.50727; Media Center PC 6.0)",
"Mozilla/5.0 (compatible; MSIE 8.0; Windows NT 6.0; Trident/4.0; WOW64; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; .NET CLR 1.0.3705; .NET CLR 1.1.4322)",
"Mozilla/4.0 (compatible; MSIE 7.0b; Windows NT 5.2; .NET CLR 1.1.4322; .NET CLR 2.0.50727; InfoPath.2; .NET CLR 3.0.04506.30)",
"Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-CN) AppleWebKit/523.15 (KHTML, like Gecko, Safari/419.3) Arora/0.3 (Change: 287 c9dfb30)",
"Mozilla/5.0 (X11; U; Linux; en-US) AppleWebKit/527+ (KHTML, like Gecko, Safari/419.3) Arora/0.6",
"Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.2pre) Gecko/20070215 K-Ninja/2.1.1",
"Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-CN; rv:1.9) Gecko/20080705 Firefox/3.0 Kapiko/3.0",
"Mozilla/5.0 (X11; Linux i686; U;) Gecko/20070322 Kazehakase/0.4.5"
]
#代理IP池 这里可以多些
PROXIES = [
{'ip_port': '112.95.27.113:8088'},]

middlewares文件
整个思路就是从settings写的 代理池 以及 请求头池里边取出一个来做为IP访问

from .settings import USER_AGENTS
from .settings import PROXIES
import request
import random
class SuningDownloaderMiddleware(object):
# Not all methods need to be defined. If a method is not defined,
# scrapy acts as if the downloader middleware does not modify the
# passed objects.
def process_request(self, request, spider):
useragent = random.choice(USER_AGENTS)
proxy = random.choice(PROXIES)
request.meta['proxy'] = "http://" + proxy['ip_port']
request.headers.setdefault("User-Agent", useragent)

顺便给大家一个免费IP网站
http://www.89ip.cn/index_7.html?tdsourcetag=s_pctim_aiomsg
温馨提示：花钱的一定比免费的好。