scrapy 项目实战（一）----爬取雅昌艺术网数据

第一步：创建scrapy项目：

　　scrapy startproject Demo

第二步：创建一个爬虫

scrapy genspider demo http://auction.artron.net/result/pmh-0-0-2-0-1/

第三步：项目结构：

第四部：依次粘贴处各个文件的代码：

　　1. demo.py 文件验证码

# -*- coding: utf-8 -*-
import scrapy
from scrapy import Request
from Demo.items import *
from bs4 import BeautifulSoup
import time
# import sys
# reload(sys)
# sys.setdefaultencoding('utf-8')
import re
import hashlib
# 加密去重def md5(str):m = hashlib.md5()m.update(str)return m.hexdigest()
#过滤注释信息，去掉换行
def replace(newline):newline = str(newline)newline = newline.replace('\r','').replace('\n','').replace('\t','').replace('   ','').replace('amp;','')re_comment = re.compile('<!--[^>]*-->')newlines = re_comment.sub('', newline)newlines = newlines.replace('<!--','').replace('-->','')return newlinesclass DemoSpider(scrapy.Spider):name = 'demo'allowed_domains = ['http://auction.artron.net/result/']start_urls = ['http://auction.artron.net/result/pmh-0-0-2-0-1/','http://auction.artron.net/result/pmh-0-0-2-0-2/','http://auction.artron.net/result/pmh-0-0-2-0-4/','http://auction.artron.net/result/pmh-0-0-2-0-5/','http://auction.artron.net/result/pmh-0-0-2-0-6/','http://auction.artron.net/result/pmh-0-0-2-0-7/','http://auction.artron.net/result/pmh-0-0-2-0-8/','http://auction.artron.net/result/pmh-0-0-2-0-9/','http://auction.artron.net/result/pmh-0-0-2-0-10/','http://auction.artron.net/result/pmh-0-0-2-0-3/']def parse(self, response):html = response.textsoup = BeautifulSoup(html,'html.parser')result_lists = soup.find_all('ul',attrs={"class":"dataList"})[0]result_lists_replace = replace(result_lists)result_lists_replace = result_lists_replace.decode('utf-8')result_list = re.findall('<ul><li class="name">(.*?)</span></li></ul></li>',result_lists_replace)for ii in result_list:item = DemoItem()auction_name_url = re.findall('<a alt="(.*?)" href="(.*?)" target="_blank" title',ii)[0]auction_name = auction_name_url[0]auction_url = auction_name_url[1]auction_url = "http://auction.artron.net" + auction_urlaucr_name_spider = re.findall('<li class="company"><a href=".*?" target="_blank">(.*?)</a>',ii)[0]session_address_time = re.findall('<li class="city">(.*?)</li><li class="time">(.*?)</li></ul>',ii)[0]session_address = session_address_time[0]item_auct_time = session_address_time[1]hashcode = md5(str(auction_url))create_time = time.strftime("%Y-%m-%d %H:%M:%S", time.localtime(time.time()))item['auction_name'] = auction_nameitem['auction_url'] = auction_urlitem['aucr_name_spider'] = aucr_name_spideritem['session_address'] = session_addressitem['item_auct_time'] = item_auct_timeitem['hashcode'] = hashcodeitem['create_time'] = create_timeprint itemyield item

2. items.py 文件

# -*- coding: utf-8 -*-import scrapyclass DemoItem(scrapy.Item):auction_name = scrapy.Field()auction_url = scrapy.Field()aucr_name_spider = scrapy.Field()session_address = scrapy.Field()item_auct_time = scrapy.Field()hashcode = scrapy.Field()create_time = scrapy.Field()

3. pipelines.py

# -*- coding: utf-8 -*-# Define your item pipelines here
#
# Don't forget to add your pipeline to the ITEM_PIPELINES setting
# See: http://doc.scrapy.org/en/latest/topics/item-pipeline.html
import json
import MySQLdbdef insert_data(dbName,data_dict):try:data_values = "(" + "%s," * (len(data_dict)) + ")"data_values = data_values.replace(',)', ')')dbField = data_dict.keys()dataTuple = tuple(data_dict.values())dbField = str(tuple(dbField)).replace("'",'')conn = MySQLdb.connect(host="10.10.10.77", user="xuchunlin", passwd="ed35sdef456", db="epai_spider_2018", charset="utf8")cursor = conn.cursor()sql = """ insert into %s %s values %s """ % (dbName,dbField,data_values)params = dataTuplecursor.execute(sql, params)conn.commit()cursor.close()conn.close()print "=====  插入成功  ====="return 1except Exception as e:print "********                 插入失败                 ********"print ereturn 0class DemoPipeline(object):def process_item(self, item, spider):dbName = "yachang_auction"data_dict= iteminsert_data(dbName, data_dict)

4. setting.py

# -*- coding: utf-8 -*-# Scrapy settings for Demo project
#
# For simplicity, this file contains only settings considered important or
# commonly used. You can find more settings consulting the documentation:
#
#     http://doc.scrapy.org/en/latest/topics/settings.html
#     http://scrapy.readthedocs.org/en/latest/topics/downloader-middleware.html
#     http://scrapy.readthedocs.org/en/latest/topics/spider-middleware.html

BOT_NAME = 'Demo'SPIDER_MODULES = ['Demo.spiders']
NEWSPIDER_MODULE = 'Demo.spiders'# Crawl responsibly by identifying yourself (and your website) on the user-agent
#USER_AGENT = 'Demo (+http://www.yourdomain.com)'# Obey robots.txt rules
ROBOTSTXT_OBEY = False# Configure maximum concurrent requests performed by Scrapy (default: 16)
#CONCURRENT_REQUESTS = 32# Configure a delay for requests for the same website (default: 0)
# See http://scrapy.readthedocs.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 = {"Host":"auction.artron.net",# "Connection":"keep-alive",# "Upgrade-Insecure-Requests":"1","User-Agent":"Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/61.0.3163.91 Safari/537.36","Accept":"text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8","Referer":"http://auction.artron.net/result/pmh-0-0-2-0-2/","Accept-Encoding":"gzip, deflate","Accept-Language":"zh-CN,zh;q=0.8","Cookie":"td_cookie=2322469817; gr_user_id=84f865e6-466f-4386-acfb-e524e8452c87; gr_session_id_276fdc71b3c353173f111df9361be1bb=ee1eb94e-b7a9-4521-8409-439ec1958b6c; gr_session_id_276fdc71b3c353173f111df9361be1bb_ee1eb94e-b7a9-4521-8409-439ec1958b6c=true; _at_pt_0_=2351147; _at_pt_1_=A%E8%AE%B8%E6%98%A5%E6%9E%97; _at_pt_2_=e642b85a3cf8319a81f48ef8cc403d3b; Hm_lvt_851619594aa1d1fb8c108cde832cc127=1533086287,1533100514,1533280555,1534225608; Hm_lpvt_851619594aa1d1fb8c108cde832cc127=1534298942",}# Enable or disable spider middlewares
# See http://scrapy.readthedocs.org/en/latest/topics/spider-middleware.html
#SPIDER_MIDDLEWARES = {#    'Demo.middlewares.DemoSpiderMiddleware': 543,
#}# Enable or disable downloader middlewares
# See http://scrapy.readthedocs.org/en/latest/topics/downloader-middleware.html
#DOWNLOADER_MIDDLEWARES = {#    'Demo.middlewares.MyCustomDownloaderMiddleware': 543,
#}# Enable or disable extensions
# See http://scrapy.readthedocs.org/en/latest/topics/extensions.html
#EXTENSIONS = {#    'scrapy.extensions.telnet.TelnetConsole': None,
#}# Configure item pipelines
# See http://scrapy.readthedocs.org/en/latest/topics/item-pipeline.html

ITEM_PIPELINES = {'Demo.pipelines.DemoPipeline': 300,
}# Enable and configure the AutoThrottle extension (disabled by default)
# See http://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 http://scrapy.readthedocs.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'

5. 爬虫数据库表格：

CREATE TABLE `yachang_auction` (`key_id` int(255) NOT NULL AUTO_INCREMENT,`auction_name` varchar(255) DEFAULT NULL,`auction_url` varchar(255) DEFAULT NULL,`aucr_name_spider` varchar(255) DEFAULT NULL,`session_address` varchar(255) DEFAULT NULL,`item_auct_time` varchar(255) DEFAULT NULL,`hashcode` varchar(255) DEFAULT NULL,`create_time` varchar(255) DEFAULT NULL,PRIMARY KEY (`key_id`),UNIQUE KEY `hashcode` (`hashcode`) USING BTREE
) ENGINE=InnoDB AUTO_INCREMENT=230 DEFAULT CHARSET=utf8;

6.数据展示

转载于:https://www.cnblogs.com/xuchunlin/p/7253951.html

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