items.py,根据需求确定自己的数据要求
1 # -*- coding: utf-8 -*- 2 3 # Define here the models for your scraped items 4 # 5 # See documentation in: 6 # https://doc.scrapy.org/en/latest/topics/items.html 7 8 import scrapy 9 10 11 class TodayScrapyItem(scrapy.Item): 12 # define the fields for your item here like: 13 # name = scrapy.Field() 14 pass 15 16 17 class TuchongItem(scrapy.Item): 18 title = scrapy.Field() #图片名字 19 views = scrapy.Field() #浏览人数 20 favorites = scrapy.Field()#点赞人数 21 img_url = scrapy.Field()#图片地址 22 23 # def get_insert_sql(self): 24 # # 存储时候用的sql语句 25 # sql = ‘insert into tuchong(title,views,favorites,img_url)‘ \ 26 # ‘ VALUES (%s, %s, %s, %s)‘ 27 # # 存储的数据 28 # data = (self[‘title‘], self[‘views‘], self[‘favorites‘], self[‘img_url‘]) 29 # return (sql, data)
setting.py 设置headers和items
# -*- coding: utf-8 -*-
# Scrapy settings for today_scrapy 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 = ‘today_scrapy‘
SPIDER_MODULES = [‘today_scrapy.spiders‘]
NEWSPIDER_MODULE = ‘today_scrapy.spiders‘
# Crawl responsibly by identifying yourself (and your website) on the user-agent
#USER_AGENT = ‘today_scrapy (+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 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‘,
‘User-Agnet‘:‘Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36‘
}
# Enable or disable spider middlewares
# See https://doc.scrapy.org/en/latest/topics/spider-middleware.html
#SPIDER_MIDDLEWARES = {
# ‘today_scrapy.middlewares.TodayScrapySpiderMiddleware‘: 543,
#}
# Enable or disable downloader middlewares
# See https://doc.scrapy.org/en/latest/topics/downloader-middleware.html
#DOWNLOADER_MIDDLEWARES = {
# ‘today_scrapy.middlewares.TodayScrapyDownloaderMiddleware‘: 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 = {
# ‘today_scrapy.pipelines.TodayScrapyPipeline‘: 300,
‘today_scrapy.pipelines.TuchongPipeline‘: 200,
}
# 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‘
pipelines.py 将图片下载到指定文件夹
1 # -*- coding: utf-8 -*-
2
3 # Define your item pipelines here
4 #
5 # Don‘t forget to add your pipeline to the ITEM_PIPELINES setting
6 # See: https://doc.scrapy.org/en/latest/topics/item-pipeline.html
7 import os
8 import requests
9
10 class TodayScrapyPipeline(object):
11 def process_item(self, item, spider):
12 return item
13
14 class TuchongPipeline(object):
15 def process_item(self, item, spider):
16 img_url = item[‘img_url‘] #从items中得到图片url地址
17 img_title= item[‘title‘] #得到图片的名字
18 headers = {
19 ‘User-Agnet‘: ‘Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36‘,
20 ‘cookie‘:‘webp_enabled=1; bad_ide7dfc0b0-b3b6-11e7-b58e-df773034efe4=78baed41-a870-11e8-b7fd-370d61367b46; _ga=GA1.2.1188216139.1535263387; _gid=GA1.2.1476686092.1535263387; PHPSESSID=4k7pb6hmkml8tjsbg0knii25n6‘
21 }
22 if not os.path.exists(img_title):
23 os.mkdir(img_title)
24 filename =img_url.split(‘/‘)[-1]
25 with open(img_title+‘/‘+filename, ‘wb+‘) as f:
26 f.write(requests.get(img_url, headers=headers).content)
27 f.close()
28 return item
爬虫文件
tuchong.py
图片的url可以直接拼接
1 # -*- coding: utf-8 -*-
2 import scrapy
3 import json
4 from today_scrapy.items import TuchongItem
5
6
7 class TuchongSpider(scrapy.Spider):
8 name = ‘tuchong‘
9 allowed_domains = [‘tuchong.com‘]
10 start_urls = [‘http://tuchong.com/‘]
11
12 def start_requests(self):
13 for pag in range(1, 20):
14 referer_url = ‘https://tuchong.com/rest/tags/自然/posts?page={}&count=20‘.format(pag) # url中红字部分可以换
15 form_req = scrapy.Request(url=referer_url, callback=self.parse)
16 form_req.headers[‘referer‘] = referer_url
17 yield form_req
18
19 def parse(self, response):
20 tuchong_info_html = json.loads(response.text)
21 # print(tuchong_info_html)
22 postList_c = len(tuchong_info_html[‘postList‘])
23 # print(postList_c)
24 for c in range(postList_c):
25 print(c)
26 # print(tuchong_info_html[‘postList‘][c])
27 title = tuchong_info_html[‘postList‘][c][‘title‘]
28 print(‘图集名称:‘+title)
29 views = tuchong_info_html[‘postList‘][c][‘views‘]
30 print(‘有‘+str(views)+‘人浏览‘)
31 favorites = tuchong_info_html[‘postList‘][c][‘favorites‘]
32 print(‘喜欢的人数:‘+str(favorites))
33 images_c = len(tuchong_info_html[‘postList‘][c][‘images‘])
34 for img_c in range(images_c):
35 user_id = tuchong_info_html[‘postList‘][c][‘images‘][img_c][‘user_id‘]
36 img_id = tuchong_info_html[‘postList‘][c][‘images‘][img_c][‘img_id‘]
37 img_url = ‘https://photo.tuchong.com/{}/f/{}.jpg‘.format(user_id,img_id)
38 item = TuchongItem()
39 item[‘title‘] = title
40 item[‘img_url‘] = img_url
41 # 返回我们的item
42 yield item
原文地址：https://www.cnblogs.com/pantom0122/p/9540299.html
时间： 2024-11-09 02:12:08