scrapy download large file handling

# A school beauty network to download pictures of the case, also suitable for processing large files, multiple files of video, audio processing

Engineering process -  
scrapy startproject xx 
cd xx 
scrapy genspider HH www.xx.com 
reptile execution scrapy crawl hh

import scrapy
from yyl.items import YylItem

class ExampleSpider(scrapy.Spider):
    name = 'xiaohua'
    # allowed_domains = ['example.com']
    start_urls = ['http://www.521609.com/daxuemeinv/']

    def parse(self, response):
        li_lst = response.xpath('//*[@id="content"]/div[2]/div[2]/ul/li')
        # print(li_lst)

        for li in li_lst:
            item = YylItem() #实例化
            # Item [ 'the src'] = '{} http://www.521609.com' .format (li.xpath ( './a/img/@src') .extract_first ()) 
            Item [ ' the src ' ] = ' http://www.521609.com ' + li.xpath ( ' ./a/img/@src ' ) .extract_first ()   # splicing full address 
            yield Item 

# pipeline responsible for download url video archive large files downloaded mechanism

Reptile file

import scrapy

class YylItem(scrapy.Item):
    # define the fields for your item here like:
    src = scrapy.Field()

items.py

Import scrapy
 from scrapy.pipelines.images Import ImagesPipeline 

class YylPipeline (Object):
     DEF process_item (Self, Item, Spider):
         Print (Item)
         return Item 

# using a scrapy a packaged specifically for large pipe class files downloaded 
class ImgPipeline (ImagesPipeline):
     # requesting large file 
    DEF get_media_requests (Self, Item, info):
         the yield scrapy.Request (Item URL = [ ' the src ' ]) 

    # for designating the name of the downloaded file 
    DEF file_path (Self, request , the Response = None, info = None): 
        URL = request.url
        filename = url.split('/')[-1]
        return filename

    #
    def item_completed(self, results, item, info):
        print(results)  # 结果 True,{url path checksum}
        return item  # process_item中的return item 作用一致

Pipeline .py

BOT_NAME = 'yyl'

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


# Crawl responsibly by identifying yourself (and your website) on the user-agent

USER_AGENT = 'Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.86 Safari/537.36'

# 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',
#}

# Enable or disable spider middlewares
# See https://doc.scrapy.org/en/latest/topics/spider-middleware.html
#SPIDER_MIDDLEWARES = {
#    'yyl.middlewares.YylSpiderMiddleware': 543,
#}

# Enable or disable downloader middlewares
# See https://doc.scrapy.org/en/latest/topics/downloader-middleware.html
#DOWNLOADER_MIDDLEWARES = {
#    'yyl.middlewares.YylDownloaderMiddleware': 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 = {
   'yyl.pipelines.YylPipeline': 301,
   'yyl.pipelines.ImgPipeline': 300,
}
IMAGES_STORE = './imgs'

LOG_LEVEL = 'ERROR'

settings.py

Reproduced in: https: //www.cnblogs.com/zhangchen-sx/p/11023198.html

scrapy download large file handling

Guess you like