scrapy-爬取王者荣耀--英雄皮肤

花了半天时间，终于将爬虫写完了，中间遇到pipelines这块真的是一个坑点，希望也给大家出个避坑指南!

第一步新建项目

scrapy startproject wangzherongyao
scrapy genspider zhaopin zhipin.com

第二步

最重要的一步
分析页面

页面概况
解析效果

爬虫代码

wangzhe.py

import json
import scrapy
from wangzherongyao.items import WangzherongyaoItem

class WangzheSpider(scrapy.Spider):
    name = 'wangzhe'
    allowed_domains = ['qq.com']
    start_urls = ['https://pvp.qq.com/web201605/js/herolist.json']
    skin_url = "https://game.gtimg.cn/images/yxzj/img201606/skin/hero-info/{}/{}-bigskin-{}.jpg"

    def parse(self, response):
        dict_result = json.loads(response.text)
        for res in dict_result:
            ename = res["ename"]
            cname = res["cname"]
            skin_name = res.get('skin_name')
            # print(ename, cname)
            if skin_name:
                skin_list = skin_name.split("|")
                # print(skin_list)
                for index, skinname in enumerate(skin_list):
                    full_skin_url = self.skin_url.format(ename, ename, index+1)
                    item = WangzherongyaoItem()
                    item["ename"] = ename
                    item["cname"] = cname
                    item["pic"] = full_skin_url
                    item["skinname"] = skinname
                    yield item

item文件

items.py

import scrapy

class WangzherongyaoItem(scrapy.Item):
    ename = scrapy.Field()
    cname = scrapy.Field()
    pic = scrapy.Field()
    skinname = scrapy.Field()

pipelines

文件需要重写三个方法
pipelines.py

from scrapy.exceptions import DropItem
from scrapy.pipelines.images import ImagesPipeline
from scrapy.utils.project import get_project_settings
import scrapy

IMAGES_STORE = get_project_settings().get('IMAGES_STORE')

class WangZheImagePipeline(ImagesPipeline):

    # 重写了发送图片请求
    def get_media_requests(self, item, info):
        print(item["pic"])
        yield scrapy.Request(url=item["pic"],meta={'item':item,'index':item['pic'].index(item["pic"])})

    # 重写 item_completed方法
    def item_completed(self, results, item, info):
        print(results)
        image_paths = [x['path'] for ok, x in results if ok]
        # print(image_paths)
        if not image_paths:
            raise DropItem('Item contains no images')
        # item['image_paths'] = image_paths
        return item

    # 重写 file_path 方法
    def file_path(self, request, response=None, info=None):
        item = request.meta['item']  # 通过上面的meta传递过来item

        image_guid = item['cname'] + '_' + item['skinname'] + '.jpg'
        print(image_guid)

        # filename = '{0}/{1}'.format(folder_name, image_guid)
        filename = image_guid
        return filename

settings文件

IMAGES_STORE = 'file'

LOG_FILE = "wangzhe.log"
LOG_LEVEL = "DEBUG"

最后放一张成品图，哈哈哈~

image.png