from scrapy.item import Item, Field 
class TencentItem(Item): 
  name = Field()        # 職位名稱 
  catalog = Field()       # 職位類別 
  workLocation = Field()    # 工作地點(diǎn) 
  recruitNumber = Field()    # 招聘人數(shù) 
  detailLink = Field()     # 職位詳情頁(yè)鏈接 
  publishTime = Field()     # 發(fā)布時(shí)間 

import re 
import json 
from scrapy.selector import Selector 
try: 
  from scrapy.spider import Spider 
except: 
  from scrapy.spider import BaseSpider as Spider 
from scrapy.utils.response import get_base_url 
from scrapy.utils.url import urljoin_rfc 
from scrapy.contrib.spiders import CrawlSpider, Rule 
from scrapy.contrib.linkextractors.sgml import SgmlLinkExtractor as sle 
from itzhaopin.items import * 
from itzhaopin.misc.log import * 
class TencentSpider(CrawlSpider): 
  name = "tencent" 
  allowed_domains = ["tencent.com"] 
  start_urls = [ 
    "http://hr.tencent.com/position.php" 
  ] 
  rules = [ # 定義爬取URL的規(guī)則 
    Rule(sle(allow=("/position.php\?&start=\d{,4}#a")), follow=True, callback='parse_item') 
  ] 
  def parse_item(self, response): # 提取數(shù)據(jù)到Items里面，主要用到XPath和CSS選擇器提取網(wǎng)頁(yè)數(shù)據(jù) 
    items = [] 
    sel = Selector(response) 
    base_url = get_base_url(response) 
    sites_even = sel.css('table.tablelist tr.even') 
    for site in sites_even: 
      item = TencentItem() 
      item['name'] = site.css('.l.square a').xpath('text()').extract() 
      relative_url = site.css('.l.square a').xpath('@href').extract()[0] 
      item['detailLink'] = urljoin_rfc(base_url, relative_url) 
      item['catalog'] = site.css('tr > td:nth-child(2)::text').extract() 
      item['workLocation'] = site.css('tr > td:nth-child(4)::text').extract() 
      item['recruitNumber'] = site.css('tr > td:nth-child(3)::text').extract() 
      item['publishTime'] = site.css('tr > td:nth-child(5)::text').extract() 
      items.append(item) 
      #print repr(item).decode("unicode-escape") + '\n' 
    sites_odd = sel.css('table.tablelist tr.odd') 
    for site in sites_odd: 
      item = TencentItem() 
      item['name'] = site.css('.l.square a').xpath('text()').extract() 
      relative_url = site.css('.l.square a').xpath('@href').extract()[0] 
      item['detailLink'] = urljoin_rfc(base_url, relative_url) 
      item['catalog'] = site.css('tr > td:nth-child(2)::text').extract() 
      item['workLocation'] = site.css('tr > td:nth-child(4)::text').extract() 
      item['recruitNumber'] = site.css('tr > td:nth-child(3)::text').extract() 
      item['publishTime'] = site.css('tr > td:nth-child(5)::text').extract() 
      items.append(item) 
      #print repr(item).decode("unicode-escape") + '\n' 
    info('parsed ' + str(response)) 
    return items 
  def _process_request(self, request): 
    info('process ' + str(request)) 
    return request 

from scrapy import signals 
import json 
import codecs 
class JsonWithEncodingTencentPipeline(object): 
  def __init__(self): 
    self.file = codecs.open('tencent.json', 'w', encoding='utf-8') 
  def process_item(self, item, spider): 
    line = json.dumps(dict(item), ensure_ascii=False) + "\n" 
    self.file.write(line) 
    return item 
  def spider_closed(self, spider): 
    self.file.close( 
)