python之scrapy爬取某集团招聘信息以及招聘详情
1、定义爬取的字段items.py
# -*- coding: utf-8 -*-# Define here the models for your scraped items
#
# See documentation in:
# https://doc.scrapy.org/en/latest/topics/items.html
import scrapy
class GosuncnItem(scrapy.Item):
"""
定义爬虫的字段
"""
# define the fields for your item here like:
# name = scrapy.Field()
platform = scrapy.Field()
position = scrapy.Field()
num = scrapy.Field()
time = scrapy.Field()
url = scrapy.Field()
content = scrapy.Field()
responsible = scrapy.Field()
page = scrapy.Field()
pass
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2、配置设置settings.py
# -*- coding: utf-8 -*-# Scrapy settings for gosuncn project
#
# For simplicity, this file contains only settings considered important or
# commonly used. You can find more settings consulting the documentation:
#
# https://doc.scrapy.org/en/latest/topics/settings.html
# https://doc.scrapy.org/en/latest/topics/downloader-middleware.html
# https://doc.scrapy.org/en/latest/topics/spider-middleware.html
BOT_NAME = 'gosuncn'
SPIDER_MODULES = ['gosuncn.spiders']
NEWSPIDER_MODULE = 'gosuncn.spiders'
LOG_LEVEL="WARNING"
# Crawl responsibly by identifying yourself (and your website) on the user-agent
#USER_AGENT = 'gosuncn (+http://www.yourdomain.com)'
# Obey robots.txt rules
ROBOTSTXT_OBEY = True
# Configure maximum concurrent requests performed by Scrapy (default: 16)
#CONCURRENT_REQUESTS = 32
# Configure a delay for requests for the same website (default: 0)
# See https://doc.scrapy.org/en/latest/topics/settings.html#download-delay
# See also autothrottle settings and docs
#DOWNLOAD_DELAY = 3
# The download delay setting will honor only one of:
#CONCURRENT_REQUESTS_PER_DOMAIN = 16
#CONCURRENT_REQUESTS_PER_IP = 16
# Disable cookies (enabled by default)
#COOKIES_ENABLED = False
# Disable Telnet Console (enabled by default)
#TELNETCONSOLE_ENABLED = False
# Override the default request headers:
#DEFAULT_REQUEST_HEADERS = {
# 'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
# 'Accept-Language': 'en',
#}
# Enable or disable spider middlewares
# See https://doc.scrapy.org/en/latest/topics/spider-middleware.html
#SPIDER_MIDDLEWARES = {
# 'gosuncn.middlewares.GosuncnSpiderMiddleware': 543,
#}
# Enable or disable downloader middlewares
# See https://doc.scrapy.org/en/latest/topics/downloader-middleware.html
#DOWNLOADER_MIDDLEWARES = {
# 'gosuncn.middlewares.GosuncnDownloaderMiddleware': 543,
#}
# Enable or disable extensions
# See https://doc.scrapy.org/en/latest/topics/extensions.html
#EXTENSIONS = {
# 'scrapy.extensions.telnet.TelnetConsole': None,
#}
# Configure item pipelines
# See https://doc.scrapy.org/en/latest/topics/item-pipeline.html
ITEM_PIPELINES = {
'gosuncn.pipelines.GosuncnPipeline': 300,
}
LOG_LEVEL ="WARNING"
LOG_FILE = "./log.log"
# Enable and configure the AutoThrottle extension (disabled by default)
# See https://doc.scrapy.org/en/latest/topics/autothrottle.html
#AUTOTHROTTLE_ENABLED = True
# The initial download delay
#AUTOTHROTTLE_START_DELAY = 5
# The maximum download delay to be set in case of high latencies
#AUTOTHROTTLE_MAX_DELAY = 60
# The average number of requests Scrapy should be sending in parallel to
# each remote server
#AUTOTHROTTLE_TARGET_CONCURRENCY = 1.0
# Enable showing throttling stats for every response received:
#AUTOTHROTTLE_DEBUG = False
# Enable and configure HTTP caching (disabled by default)
# See https://doc.scrapy.org/en/latest/topics/downloader-middleware.html#httpcache-middleware-settings
#HTTPCACHE_ENABLED = True
#HTTPCACHE_EXPIRATION_SECS = 0
#HTTPCACHE_DIR = 'httpcache'
#HTTPCACHE_IGNORE_HTTP_CODES = []
#HTTPCACHE_STORAGE = 'scrapy.extensions.httpcache.FilesystemCacheStorage'
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3、爬取某集团的招聘信息，注意：items的字段必须和该文件爬取的字段一直，否则报错
# -*- coding: utf-8 -*-import scrapy
import logging
from gosuncn.items import GosuncnItem
logger = logging.getLogger(__name__)
#引入日志
class GaoxinxingSpider(scrapy.Spider):
name = 'gaoxinxing'
allowed_domains = ['gosuncn.zhiye.com']
start_urls = ['http://gosuncn.zhiye.com/Social']
next_page_num = 1
def parse(self, response):
tr_list = response.xpath("//table[@class='jobsTable']/tr")[1:]
#print(tr_list)
for tr in tr_list:
item = GosuncnItem()
item["position"]=tr.xpath(".//td[1]/a/text()").extract_first()
item["url"] = "http://gosuncn.zhiye.com"+tr.xpath(".//td[1]/a/@href").extract_first()
item["platform"] = tr.xpath(".//td[3]/text()").extract_first()
item["num"] = tr.xpath(".//td[4]/text()").extract_first()
item["time"] = tr.xpath(".//td[6]/text()").extract_first()
item["page"]= self.next_page_num
#print(item)
#logger.warning(item) #打印日志
#yield item
################爬取详情页######################
yield scrapy.Request(
item["url"],
callback=self.url_parse, # 不能打括号，否则是调用了
meta = {"item":item}# 将数据传递给url_parse()
)
##############翻页爬取###############################
next_page_url = response.xpath("//div[@class='pager2']//a[@class='next']/@href").extract_first()
print(next_page_url)
self.next_page_num = self.next_page_num+1
if self.next_page_num<5:
next_url = "http://gosuncn.zhiye.com/social/?PageIndex=" + str(self.next_page_num)
#print(next_url)
yield scrapy.Request(
next_url,
callback=self.parse #不能打括号，否则是调用了
)
def url_parse(self,response):
"""
爬取详情页
:param response:
:return:
"""
item = response.meta["item"]
item["content"] = response.xpath("//div[@class='xiangqingcontain']/ul[@class='xiangqinglist clearfix']/li[6]/text()").extract()
#item["responsible"] = response.xpath("//div[@class='xiangqingcontain']/div[@class='xiangqingtext']/p[2]/text()").extract()
logger.warning(item) # 打印日志
#print(item)
yield item
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4、在pipelines处理传递过来的数据
# -*- coding: utf-8 -*-# Define your item pipelines here
#
# Don't forget to add your pipeline to the ITEM_PIPELINES setting
# See: https://doc.scrapy.org/en/latest/topics/item-pipeline.html
import re
from gosuncn.items import GosuncnItem
class GosuncnPipeline(object):
def process_item(self, item, spider):
if isinstance(item,GosuncnItem):
item["content"] = self.process_content(item["content"])
print(item)
return item
def process_content(self,content):
content =[re.sub(r"\r\n|' '","",i) for i in content]
content = [i for i in content if len(i)>0]
return content
# class GosuncnPipeline1(object):
# def process_item(self, item, spider):
# if isinstance(item,GosuncnItem):
# print(item)
# return item
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