好久没发帖子了，发一个壁纸下载的scrapy

bboydandy 发表于 2020-11-3 15:48

本帖最后由 bboydandy 于 2020-11-3 20:49 编辑

程序基于SCRAPY框架，爬取目标为某岸壁纸首先spider文件内容
自己又重新测试了一下，可以爬全站，大佬们自行替换URL地址~
有大佬说不是原图，看了一下确实是，就当给自己学习框架留一个参考，谢谢大家批评指正~~~:lol
import scrapy
from bian.items import BianItem

class BizhiSpider(scrapy.Spider):
name = 'bizhi'
# allowed_domains = ['netbian.com']
start_urls = ['http://pic.netbian.com/index_{}.html'.format(i) for i in range(1,1256)]

def parse(self, response):
   href_list = response.xpath('//*[@id="main"]/div[@class="slist"]/ul/li/a/@href').extract()
   for i in range(len(href_list)-1):
         url = 'http://pic.netbian.com' + href_list
         yield scrapy.Request(url,callback=self.parse_info)
def parse_info(self,response):
   item = BianItem()
   # print(response.xpath('//*[@id="img"]/img/@src').extract())
   imageurl = 'http://pic.netbian.com' + response.xpath('//*[@id="img"]/img/@src').extract()
   print(imageurl)
   item['imageurl'] = imageurl
   yield item
接下来是ITEMS
import scrapy

class BianItem(scrapy.Item):
# define the fields for your item here like:
# name = scrapy.Field()
imageurl = scrapy.Field()
pass

然后管道类
# Define your item pipelines here
#
# Don't forget to add your pipeline to the ITEM_PIPELINES setting
# See: https://docs.scrapy.org/en/latest/topics/item-pipeline.html

# useful for handling different item types with a single interface
from itemadapter import ItemAdapter
from scrapy.pipelines.images import ImagesPipeline
import scrapy

class BianPipeline(object):
def process_item(self, item, spider):
   return item
class BianImagePipeline(ImagesPipeline):
def get_media_requests(self, item, info):
   # 1 获取图片链接
   imageurl= item["imageurl"]
   # 2 向图片链接发请求,响应会保存在settings.py中的IMAGES_STORE路径中
   yield scrapy.Request(imageurl)
   return item
最后setting
# Scrapy settings for bian project
#
# For simplicity, this file contains only settings considered important or
# commonly used. You can find more settings consulting the documentation:
#
# https://docs.scrapy.org/en/latest/topics/settings.html
# https://docs.scrapy.org/en/latest/topics/downloader-middleware.html
# https://docs.scrapy.org/en/latest/topics/spider-middleware.html

BOT_NAME = 'bian'

SPIDER_MODULES = ['bian.spiders']
NEWSPIDER_MODULE = 'bian.spiders'

# Crawl responsibly by identifying yourself (and your website) on the user-agent
USER_AGENT = 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.111 Safari/537.36'

# Obey robots.txt rules
ROBOTSTXT_OBEY = False
LOG_LEVEL = 'ERROR'

IMAGES_STORE = './ImageSpider'
# 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://docs.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://docs.scrapy.org/en/latest/topics/spider-middleware.html
#SPIDER_MIDDLEWARES = {
# 'bian.middlewares.BianSpiderMiddleware': 543,
#}

# Enable or disable downloader middlewares
# See https://docs.scrapy.org/en/latest/topics/downloader-middleware.html
DOWNLOADER_MIDDLEWARES = {
'bian.middlewares.BianDownloaderMiddleware': 543,
}

# Enable or disable extensions
# See https://docs.scrapy.org/en/latest/topics/extensions.html
#EXTENSIONS = {
# 'scrapy.extensions.telnet.TelnetConsole': None,
#}

# Configure item pipelines
# See https://docs.scrapy.org/en/latest/topics/item-pipeline.html
ITEM_PIPELINES = {
# 'bian.pipelines.BianPipeline': 300,
'bian.pipelines.BianImagePipeline': 300
}

# Enable and configure the AutoThrottle extension (disabled by default)
# See https://docs.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://docs.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'

代码很简单，就不写注释了，大佬勿喷~

nu0l 发表于 2020-11-3 19:33

请问
from bian.items import BianItem
ModuleNotFoundError: No module named 'bian'
这个bian是啥

bboydandy 发表于 2020-11-3 20:40

恒大大发表于 2020-11-3 20:35
下载的并不是原图，你这样爬下来的和网页直接右键是一样的画质。

大神明示

92pojie 发表于 2020-11-3 17:15

支持大佬原创。。{:1_890:}{:1_894:}{:1_900:}

imyxuan 发表于 2020-11-3 17:25

这里面下载的是原图吗

xyong 发表于 2020-11-3 17:29

怎么使用呢

bboydandy 发表于 2020-11-3 18:00

imyxuan 发表于 2020-11-3 17:25
这里面下载的是原图吗

是原图啊

bboydandy 发表于 2020-11-3 18:02

xyong 发表于 2020-11-3 17:29
怎么使用呢

scrapy crawl bizhi

ajinxixi 发表于 2020-11-3 18:04

下载试试感谢分享

bboydandy 发表于 2020-11-3 18:22

ajinxixi 发表于 2020-11-3 18:04
下载试试感谢分享

应该可以爬全站，换个URL试试

yber 发表于 2020-11-3 18:34

点个赞👍🏻

ghoob321 发表于 2020-11-3 19:10

感谢大佬分享。。

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好久没发帖子了，发一个壁纸下载的scrapy