scrapy下载斗鱼主播图片

spiders文件夹下的爬虫文件（自己在spiders下创建）
# -*- coding: utf-8 -*-
import scrapy
import json
from Douyu.items import DouyuItem

class DouyuspiderSpider(scrapy.Spider):
    name = 'douyuspider'
    allowed_domains = ['douyucdn.cn']

    basicUrl="http://capi.douyucdn.cn/api/v1/getVerticalRoom?limit=20&offset="
    offset=0
    start_urls = [basicUrl+str(offset)]

    def parse(self, response):
        data_list=json.loads(response.body)["data"]
        if not len(data_list):
            return
        for data in data_list:
            item=DouyuItem()
            item["nickname"]=data["nickname"]
            item["imagelink"]=data["vertical_src"]

            yield item
        self.offset+=20
        yield scrapy.Request(self.basicUrl+str(self.offset),callback=self.parse)

items文件

# -*- 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 DouyuItem(scrapy.Item):
    # define the fields for your item here like:
    # name = scrapy.Field()
    nickname=scrapy.Field()
    imagelink=scrapy.Field()

pipelines文件

# -*- 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 os #用来重命名
import json
import scrapy
from settings import IMAGES_STORE as images_store
from scrapy.pipelines.images import ImagesPipeline #专门用来下载图片的函数
class DouyuPipeline(ImagesPipeline):
    def get_media_requests(self,item,info):
        image_link=item["imagelink"]
        yield scrapy.Request(image_link)
    def item_completed(self, results, item, info): #用来重命名
        #取出图片信息results里的图片的path路径信息，OK表示results里的true
        image_path=[x["path"]for ok,x in results if ok]
        os.rename(images_store+image_path[0],images_store+item["nickname"]+".jpg")#重命名方法
        return item

settings文件

# -*- coding: utf-8 -*-

# Scrapy settings for Douyu 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 = 'Douyu'

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


IMAGES_STORE="D:\PycharmProjects\Douyu\images"  #自己设置图片保存的路径

# Crawl responsibly by identifying yourself (and your website) on the user-agent
#USER_AGENT = 'Douyu (+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',
#}

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

# Enable or disable downloader middlewares
# See https://doc.scrapy.org/en/latest/topics/downloader-middleware.html
#DOWNLOADER_MIDDLEWARES = {
#    'Douyu.middlewares.DouyuDownloaderMiddleware': 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 = {
   'Douyu.pipelines.DouyuPipeline': 300,
}

# 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'