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


class QiushibaiSpider(scrapy.Spider):
    name = ‘qiushibai‘
    # allowed_domains = [‘www.qiushibaike.com/text/‘]
    start_urls = [‘http://www.qiushibaike.com/text//‘]

    def parse(self, response):
        #    建议大家使用xpath进行指定内容的解析（框架集成了xpath解析的接口）
        #    段子的内容和作者
        div_list = response.xpath(‘//div[@id="content-left"]/div‘)
        # data_list = []
        for div in div_list:
            # xpath解析到的指定内容被存储到了Selector对象
            # extract()该方法可以将Selector对象中存储的数据值拿到
            # author = div.xpath("./div/a[2]/h2/text()").extract()[0]
            # extract_first() == extract()[0]
            author = div.xpath("./div/a[2]/h2/text()").extract_first()
            content = div.xpath(‘.//div[@class="content"]/span/text()‘).extract_first()
            # print(author, ‘---------------‘)
            # print(content)
            # data = {
            #     "author": author,
            #     "content": content
            # }

            # 将解析到数值的数据存储到item对象
            item = QiubaiItem()
            item["author"] = author
            item["content"] = content
            # 将item对象提交给管道
            yield item

# -*- 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 QiubaiItem(scrapy.Item):
    # define the fields for your item here like:
    author = scrapy.Field()
    content = scrapy.Field()

# -*- 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


class QiubaiPipeline(object):
    fp = None
    # 该方法只会在爬虫开始运行的时候调用一次

    def open_spider(self, spider):
        print("开始爬虫")
        self.fp = open("./data_record.txt", "w", encoding="utf-8")
    # 该方法就可以接受爬虫文件中提交过来的item对象，并且对item对象中存储的页面数据进行持久化存储
    # 参数item就是接收到的item对象
    # 每当爬虫文件向管道提交一次item,则该方法就会被执行一次

    def process_item(self, item, spider):
        # 取出item中的对象存储数据
        author = item["author"]
        content = item["content"]
        # 持久化存储
        self.fp.write(author + ":" + content + "\n\n\n")
        return item

    # 该方法只会在爬虫结束时调用一次

    def close_spider(self, spider):
        print("爬虫结束")
        self.fp.close()