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lagou.py
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lagou.py
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import json
import uuid
from multiprocessing import Pool
import requests
import time
from bs4 import BeautifulSoup
from pymongo import MongoClient
def get_uuid():
return str(uuid.uuid4())
client = MongoClient('localhost', 27017)
db = client.Lagou
header = {
"Accept": "application/json, text/javascript, */*; q=0.01",
"Accept-Encoding": "gzip, deflate, br",
"Accept-Language": "zh-CN,zh;q=0.9,en;q=0.8",
"Connection": "keep-alive",
"Content-Length": "26",
"Content-Type": "application/x-www-form-urlencoded; charset=UTF-8",
"Cookie": "JSESSIONID="+get_uuid(),
"Host": "www.lagou.com",
"Origin": "https://www.lagou.com",
"Referer": "https://www.lagou.com/jobs/list_python?labelWords=&fromSearch=true&suginput=",
"User-Agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.162 Safari/537.36",
"X-Anit-Forge-Code": "0",
"X-Anit-Forge-Token": "None",
"X-Requested-With": "XMLHttpRequest"
}
def request_url(offset):
url = "https://www.lagou.com/jobs/positionAjax.json"
payload = {'px': 'new',
'needAddtionalResult': 'false',
'isSchoolJob': '0'
}
formdata = {'first': 'false',
'pn': offset,
'kd': 'python'
}
try:
response = requests.request("POST", url, data=formdata, params=payload, headers=header)
if response.status_code == 200:
return response.json()
return None
except ConnectionError:
print('connect error')
return None
def get_detailID(origin_json):
if "content" in origin_json.keys():
for item in origin_json["content"]["hrInfoMap"]:
yield item
def requset_detail(ID):
url = "https://www.lagou.com/jobs/{ID}.html"
header = {
"User-Agent": "Mozilla / 5.0(Macintosh;IntelMacOSX10_13_3) AppleWebKit / 537.36(KHTML, likeGecko) Chrome / 65.0.3325.162Safari / 537.36",
"Cookie": "JSESSIONID = " + get_uuid()
}
try:
respons = requests.get(url.format(ID=ID), headers=header)
if respons.status_code == 200:
return respons.text
return None
except ConnectionError:
print('url error', url)
return None
def parse_detail(html,ID):
soup = BeautifulSoup(html,'lxml')
name = soup.find('div',class_="job-name")
company = soup.find('img',class_='b2')
industry = soup.select('#job_company > dd > ul > li')
INFO = {"ID": ID, "NAME":'',"COMPANY":'',"INDUSTRY":''}
if name :
INFO["ID"]=ID
INFO["NAME"]=name.get('title')
INFO["COMPANY"]=company.attrs['alt']
INFO["INDUSTRY"]=industry[0].get_text()[:-3].strip(' \s \n')
else:
print("error in INFO" , ID )
return False
request = soup.select('body > div.position-head > div > div.position-content-l > dd > p > span')
Request = {"SALARY": '', "ADDRESS": '' , "EXPERIENCE": '','EDUCATION':'', "NATURE":''}
for key,item in zip(Request,request):
if item :
Request[key]=item.get_text().strip('/ ')
else:
print("error in request" , ID)
return False
job_detail = soup.select('#job_detail > dd.job_bt > div > p',)
# job_detail_l = soup.select('#job_detail > dd.job_bt > div > ol > li:nth-child(1) > p')
# job_detail = job_detail + job_detail_l
content = ''
for detail in job_detail:
text = detail.get_text()
content = content + text
INFO.update(Request)
INFO['DETAIL'] = content
return INFO
def mongodb(doc, db,ID):
if db.lagou_info.find({'ID':ID}).count == 1:
print(db.lagou_info.find({'ID':ID}).count)
print("it have already exixt !")
else:
if db['lagou'].update({'ID': doc['ID']}, {'$set': doc }, True):
print(db.lagou_info.find({'ID':ID}))
print("save to mongo succsee")
return True
else:
print("save False")
return False
def main(offset):
for id in get_detailID(request_url(offset)):
html = requset_detail(id)
time.sleep(2)
doc = parse_detail(html, id)
global a
a += 1
print(offset,a,doc)
if doc:
mongodb(doc, db,id)
else:
print(" 爬虫失败 : "+ id + "\n")
if __name__ == '__main__':
a = 1
pageCount = request_url(1)['content']['positionResult']['totalCount'] // 15
print(pageCount)
for page in range(1,pageCount+1):
try:
if page%30 == 0:
time.sleep(30)
else:
main(page)
except:
print("something happend")
# pool = Pool()
# group = [x for x in range(1,pageCount+1)]
# pool.map(main,group)