import re
import urllib
import urllib.request
#获取赶集网数据
def begin(url):
 #要伪装成的浏览器(我这个是用的chrome)
 headers = ('User-Agent','Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2490.86 Safari/537.36')
 opener = urllib.request.build_opener()
 #将要伪装成的浏览器添加到对应的http头部
 opener.addheaders=[headers]
 #读取相应的url
 data = opener.open(url).read()
 #将获得的html解码为utf-8
 data=data.decode('utf-8')
 return data
#处理数据，返回字典城市对应城市的url
def get_cityinfo(data):
 city_info1=re.findall(r'dl>(.*?)</dl>',data,re.S)
 city_info2=re.findall(r'(<a.*?</a>)',city_info1[0],re.S)
 city_dict={}
 for each in city_info2:
  key=re.findall('>(.*?)</',each,re.S)
  city_url=re.findall('href="(.*?)"',each,re.S)
  city_dict[key[0]]=city_url[0]
 return city_dict
#获取所有的a标签，并从a标签中获取信息
def a_info(data):
 a_info=re.findall(r'(<a.*?</a>)',data[0],re.S)
 a_dict={}
 for each in a_info:
  key=re.findall('>(.*?)</',each,re.S)
  a_url=re.findall('"(.*?)"',each,re.S)
  a_dict[key[0]]=a_url[0]
 return a_dict
#获取对应城市信息的所有分类
def get_cityinfoclass():
  #目前先获取招聘信息，后面有时间再继续补充完善这个模块
 info= 'zhaopin/'
 return info
#获取对应城市和其城市分类的信息
def getzhaopin(city_info,infoclass):
 #先搞成都的信息招聘
 city_url=city_info['成都']
 cdzp_url=city_url+infoclass
 cdzp_info=begin(cdzp_url)
 return city_url,cdzp_info
#获取成都市招聘信息
def get_zhaopin_info(city_url,cdzp_info):
 allzp_info=re.findall('class="f-all-news"(.*?)</div>',cdzp_info,re.S)
 a_dict={}
 class_info=re.findall('<dd>(.*?)</dd>',allzp_info[0],re.S)
 for each in class_info:
  a_info=re.findall(r'(<a.*?</a>)',each,re.S)
  for each1 in a_info:
   key=re.findall('>(.*?)</',each1,re.S)
   a_url=re.findall('href="/(.*?)"',each1,re.S)
   a_dict[key[0].strip()]=city_url+a_url[0]
 return a_dict
#获取招聘信息的具体内容
def get_city_zpinfo_detail(url):
 #先获取软件工程师
 sorft_engineer=(zp_class_info['软件工程师'])
 job_url_info=begin(sorft_engineer)
 get_detail_info(job_url_info)
#处理详情页的信息
def get_detail_info(list_info):
 job_info=re.findall('<dl class="list-noimg job-list clearfix"(.*?)</dl',list_info,re.S)
 print(job_info[0])
if __name__=='__main__':
 url='http://www.ganji.com/index.htm';
 data=begin(url);
 #所有城市信息
 city_info=get_cityinfo(data)
 #对应的分类
 infoclass=get_cityinfoclass()
 cdzp_url,xiaoshou=getzhaopin(city_info,infoclass)
 #获取招聘的分类信息
 zp_class_info=get_zhaopin_info(cdzp_url,xiaoshou)
 get_city_zpinfo_detail(zp_class_info)