Scrapy框架 之某视频网站采集案例

代码只能作为学习，请不要用于其他。

一、效果图

 二、代码编写

1、items.py

# -*- 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 Scrapy77DianshiItem(scrapy.Item):
    # define the fields for your item here like:
    #电影标题
    title = scrapy.Field()
    #电影封面
    pic = scrapy.Field()
    #电影描述
    desc = scrapy.Field()
    #电影类型
    remarks = scrapy.Field()
    #详情地址
    link = scrapy.Field()
    pass

2、movie.py

# -*- coding: utf-8 -*-
import scrapy
from ..items import Scrapy77DianshiItem

class MovieSpider(scrapy.Spider):
    name = 'movie'
    allowed_domains = ['77dianshi.com']

    page = 1
    host = "http://77dianshi.com"
    url = host + "/iTe5kdy/page_{0}.html"
    start_urls = [url.format(str(page))]

    def parse(self, response):

        print("当前采集第{0}页".format(self.page))

        # 获取列表
        for each in response.xpath("//ul[@class='fed-list-info fed-part-rows']//li"):
            item = Scrapy77DianshiItem()

            item['title'] = each.xpath('./a[2]//text()').extract()[0]
            item['link'] = self.host + each.xpath('./a[1]/@href').extract()[0]
            item['desc'] = each.xpath('./span[1]//text()').extract()[0]
            item['remarks'] = each.xpath('./a[1]//span[3]//text()').extract()[0]
            item['pic'] = each.xpath('./a[1]/@data-original').extract()[0]

            yield item

        #判断是否到最后一页
        last_page = response.xpath("//div[@class='pages text-center']//a[last()]//text()").extract()[0]
        if last_page == "»":
            #不是最后一页
            self.page += 1
            yield scrapy.Request(self.url.format(self.page), callback=self.parse)
        else:
            print('结束采集，最后一页：'

3、pipelines.py

# -*- 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 json

class Scrapy77DianshiPipeline(object):

    def __init__(self):
        #打开json文件
        self.file = open('movie.json', 'w')

    def process_item(self, item, spider):
        # print(item)
        # 保存到json文件
        self.file.write(json.dumps(dict(item), ensure_ascii=False)+'\n')
        return item

    def close_spider(self, spider):
        self.file.close()

4、start.py启动文件

from scrapy import cmdline
import os

if __name__ == "__main__":
    # 获取当前路径
    dirpath=os.path.dirname(os.path.abspath(__file__))
    # 切换到当前目录
    os.chdir(dirpath)         
    #执行爬虫
    cmdline.execute("scrapy crawl movie".split())