Python爬虫 —— 抓取美女图片（Scrapy篇）

# -*- 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 GirlpicItem(scrapy.Item):
    title = scrapy.Field()
    image = scrapy.Field()
    index = scrapy.Field()

#coding:utf-8
from scrapy.spiders import Spider
from scrapy.http import Request
from scrapy.selector import Selector
from girlpic.items import GirlpicItem
import scrapy
import sys
reload(sys)
sys.setdefaultencoding(‘utf-8‘)

class GirlpicSipder(Spider):
    name = ‘girlpic‘
    allowed_domains = []  # 允许的域名
    start_urls = ["http://www.mzitu.com/all/"]

    def parse(self, response):
        groups = response.xpath("//div[@class=‘main-content‘]//ul[@class=‘archives‘]//a")
        count = 0
        for group in groups:
            count = count + 1
            if count > 5:
                return   #此处小心，不要用os.exit(0)
            groupUrl = group.xpath(‘@href‘).extract()[0]
            title = group.xpath("text()").extract()[0]
            request = scrapy.Request(url=groupUrl, callback=self.getGroup, meta={‘title‘: title,‘groupUrl‘:groupUrl}, dont_filter=True)
            yield request

    def getGroup(self, response):
        maxIndex = response.xpath("//div[@class=‘pagenavi‘]//span/text()").extract()[-2]
        for index in range(1, int(maxIndex) + 1):
            pageUrl = response.meta[‘groupUrl‘]+‘/‘+str(index)
            meta = response.meta
            meta[‘index‘] = index
            request = scrapy.Request(url=pageUrl, callback=self.getPage, meta=meta, dont_filter=True)
            yield request

    def getPage(self, response):
        imageurl = response.xpath("//div[@class=‘main-image‘]//img/@src").extract()[0]  # 获取图片url
        request = scrapy.Request(url=imageurl, callback=self.FormItem, meta=response.meta,dont_filter=True)
        yield request

    def FormItem(self, response):
        title = response.meta[‘title‘]
        index = response.meta[‘index‘]
        image = response.body
        item = GirlpicItem(title=title,index=index,image=image)
        yield item

# -*- 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
import codecs
import sys
reload(sys)
sys.setdefaultencoding(‘utf-8‘)

class GirlpicPipeline(object):

    def __init__(self):
        self.dirpath = u‘D:\学习资料‘
        if not os.path.exists(self.dirpath):
            os.makedirs(self.dirpath)

    def process_item(self, item, spider):
        title = item[‘title‘]
        index = item[‘index‘]
        image = item[‘image‘]
        groupdir = os.path.join(self.dirpath, title)
        if not os.path.exists(groupdir):
            os.makedirs(groupdir)
        imagepath = os.path.join(groupdir, str(index) + u‘.jpg‘)
        file = codecs.open(imagepath, ‘wb‘)
        file.write(image)
        file.close()
        return item