我正在尝试在我的scrapy项目中使用多个代理。我找到了middlewares.py
here的这个脚本:
import random
from scrapy.conf import settings
from myScrape.settings import USER_AGENT_LIST
import logging
class RandomUserAgentMiddleware(object):
def process_request(self, request, spider):
ua = random.choice(USER_AGENT_LIST)
print('ua = %s' %ua)
if ua:
request.headers.setdefault('User-Agent', ua)
# check which ua is used
logging.debug(u'\n>>>>> User-Agent: %s\n' %request.headers)
且USER_AGENT_LIST
位于settings.py
:
USER_AGENT_LIST = [
'Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:43.0) Gecko/20100101 Firefox/43.0',
'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/535.7 (KHTML, like Gecko) \
Chrome/16.0.912.36 Safari/535.7',
'Mozilla/5.0 (Windows NT 6.2; Win64; x64; rv:16.0) Gecko/16.0 Firefox/16.0',
'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_3) AppleWebKit/534.55.3 \
(KHTML, like Gecko) Version/5.1.3 Safari/534.53.10'
]
DOWNLOADER_MIDDLEWARES = {
'myScrape.middlewares.RandomUserAgentMiddleware': 400,
'scrapy.downloadermiddleware.useragent.UserAgentMiddleware': None,
# Disable compression middleware, so the actual HTML pages are cached
}
但它没有像我期望的那样起作用。我仍然在抓取时看到Scrapy用户代理。调用middlewares.py
中的打印功能并显示正确的ua,但是日志输出提供了Scrapy代理。
它是如何工作的?我是否需要从蜘蛛脚本中以某种方式调用它?
答案 0 :(得分:0)
正如eLRuLL所指出的,这是一个错字。我错过了downloadermiddlewares
上的's',表示UserAgentMiddleware