心塞的一天 废话不多说直接上图 代码存放在github 地址：https://github.com/zhangshier/scrapy-
查看他登入的网址
企查查 地址 www.qichacha.com/user_login
1.创建爬虫
scrapy startproject qichacha 创建爬虫文件
cd qichacha
scrapy genspider qicha 创建爬虫
创建middlewares.py文件
代码：
# -*- coding: utf-8 -*-
# Define here the models for your spider middleware
#
# See documentation in:
# http://doc.scrapy.org/en/latest/topics/spider-middleware.html
fromscrapyimportsignals
importrandom
fromscrapy.confimportsettings
classMiddlewaretestSpiderMiddleware(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
deffrom_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)
returns
defprocess_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.
returnNone
defprocess_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.
foriinresult:
yieldi
defprocess_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
defprocess_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).
forrinstart_requests:
yieldr
defspider_opened(self,spider):
spider.logger.info(‘Spider opened: %s’% spider.name)
#更换User-agent
classUAMiddleware(object):
user_agent_list = settings[‘USER_AGENT_LIST’]
defprocess_request(self,request,spider):
ua = random.choice(self.user_agent_list)
request.headers[‘User-Agent’] = ua
#反爬虫 实现代理ip
classProxyMiddleware(object):
ip_list = settings[‘IP_LIST’]
defprocess_request(self,request,spider):
ip = random.choice(self.ip_list)
request.meta[‘proxy’] = ip
fromseleniumimportwebdriver
fromscrapy.httpimportHtmlResponse
classJSPageMiddleware(object):
#通过chrome 动态访问
defprocess_request(self,request,spider):
ifspider.name ==”qicha”:
spider. browser.get(request.url)
importtime
time.sleep(3)
spider.browser.find_element_by_xpath(‘//div[@class=”form-group has-feedback m-l-lg m-r-lg m-t-xs m-b-none”]/input[@name=”nameNormal”]’).send_keys(“你自己的账号”)
spider.browser.find_element_by_xpath(‘//div[@class=”form-group has-feedback m-l-lg m-r-lg m-t-xs m-b-none”]/input[@name=”pwdNormal”]’).send_keys(“你自己的密码”)
time.sleep(9)
#spider.browser.find_element_by_xpath(‘//div[@class=”m-l-lg m-r-lg m-t-lg”]/button[@class=”btn btn-primary m-t-n-xs btn-block btn-lg font-15″]’).click()
returnHtmlResponse(url=spider.browser.current_url,body=spider.browser.page_source,encoding=”utf-8″)
到spider 下的 qicha.py
代码
# -*- coding: utf-8 -*-
importscrapy
fromscrapy.httpimportFormRequest
fromseleniumimportwebdriver
fromscrapy.xlib.pydispatchimportdispatcher
fromscrapyimportsignals
classQichaSpider(scrapy.Spider):
name =”qicha”
allowed_domains = [“http://www.qichacha.com/”]
start_urls = [‘http://www.qichacha.com/user_login’]
def__init__(self):
self.browser = webdriver.Chrome(executable_path=”C:/Program Files (x86)/Google/Chrome/Application/chromedriver.exe”) # 与你自己的chromedrive位置相对
super(QichaSpider,self).__init__()
dispatcher.connect(self.spider_closed,signals.spider_closed)
defspider_closed(self,spider):
#当爬虫退出的时候 关闭chrome
print(“spider closed”)
# self.browser.quit()
defparse(self,response):
printresponse.body.decode
配置settings.py 用来存放代理ip 跟useragent
DOWNLOADER_MIDDLEWARES = {
‘qichacha.middlewares.UAMiddleware’:543, #用来更换useragent
‘qichacha.middlewares.ProxyMiddleware’:544,#用来更换代理ip
‘qichacha.middlewares.JSPageMiddleware’:540,#与，middlewares对应 用来实现自动登入
}
#user_agent
USER_AGENT_LIST = [‘Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.1 (KHTML, like Gecko) Chrome/22.0.1207.1 Safari/537.1’,
‘Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.95 Safari/537.36’,
‘Mozilla/5.0 (X11; CrOS i686 2268.111.0) AppleWebKit/536.11 (KHTML, like Gecko) Chrome/20.0.1132.57 Safari/536.11’]
#代理ip
IP_LIST = [‘http://175.155.25.19:80’,
‘http://124.88.67.19:80’,
‘http://110.72.32.103:8123’,
‘http://175.155.25.40:808’,
‘http://175.155.24.2:808’]
