首页 > 编程语言 > 详细

【菜鸟学Python】使用Scrapy框架爬取糗事百科

时间:2019-10-16 20:05:53      阅读:62      评论:0      收藏:0      [点我收藏+]

第一步:

创建项目

scrapy stratproject [name]

如 scrapy startproject choushibaike

第二步:

进入到项目的文件夹目录创建APP

scrapy gensider baike lovehhy.net

第三步:

配置baike.py文件

技术分享图片
# -*- coding: utf-8 -*-
import scrapy
from ..items import ChoushibaikeItem


class BaikeSpider(scrapy.Spider):
name = ‘baike‘
allowed_domains = [‘lovehhy.net‘]
start_urls = [‘http://www.lovehhy.net/joke/Detail/QSBK‘]

def parse(self, response):

titles = response.xpath(‘//div[@class="cat_llb"]/h3/a/text()‘).extract()
contents = response.xpath(‘//div[@class="cat_llb"]/div[@id="endtext"]/text()‘).extract()
times = response.xpath(‘//div[@class="cat_llb"]/text()‘).extract()

title_list = []
for title in titles:
title_list.append(title)

content_list = []
for content in contents:
content_list.append(content)

time_list = []
for time in times:
time_list.append(time)

item_lists = zip(title_list, content_list, time_list)
for item_list in item_lists:
item = ChoushibaikeItem()
item[‘title‘] = item_list[0]
item[‘content‘] = item_list[1]
item[‘time‘] = item_list[2][0:22]
item[‘click‘] = item_list[2][22:-1]
yield item

next_url = response.xpath(‘//a[text()="下一页>>"]/@href‘).extract_first()
url = response.urljoin(next_url)
yield scrapy.Request(url=url, callback=self.parse)
技术分享图片

第四步:

配置items.py文件

技术分享图片
import scrapy
class ChoushibaikeItem(scrapy.Item):
# define the fields for your item here like:
# name = scrapy.Field()
title = scrapy.Field()
content = scrapy.Field()
time = scrapy.Field()
click = scrapy.Field()
技术分享图片

第五步:

配置pipelines.py文件

技术分享图片
import pymongo


class MongoPipeline(object):
    def __init__(self, mongo_uri, mongo_db):
        self.mongo_uri = mongo_uri
        self.mongo_db = mongo_db

    @classmethod
    def from_crawler(cls, crawler):
        return cls(
            mongo_uri=crawler.settings.get(‘MONGO_URI‘),
            mongo_db=crawler.settings.get(‘MONGO_DB‘)
        )

    def open_spider(self, spider):
        self.client = pymongo.MongoClient(self.mongo_uri)
        self.db = self.client[self.mongo_db]

    def process_item(self, item, spider):
        name = item.__class__.__name__
        self.db[name].insert(dict(item))
        return item

    def close_spider(self, spider):
        self.client.close()
技术分享图片

第六步:

配置settings.py文件

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

# Scrapy settings for choushibaike project
#
# For simplicity, this file contains only settings considered important or
# commonly used. You can find more settings consulting the documentation:
#
#     https://docs.scrapy.org/en/latest/topics/settings.html
#     https://docs.scrapy.org/en/latest/topics/downloader-middleware.html
#     https://docs.scrapy.org/en/latest/topics/spider-middleware.html

BOT_NAME = choushibaike

SPIDER_MODULES = [choushibaike.spiders]
NEWSPIDER_MODULE = choushibaike.spiders


# Crawl responsibly by identifying yourself (and your website) on the user-agent
USER_AGENT = Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/77.0.3865.90 Safari/537.36

# Obey robots.txt rules
ROBOTSTXT_OBEY = False


ITEM_PIPELINES = {
   # ‘choushibaike.pipelines.ChoushibaikePipeline‘: 300,
   choushibaike.pipelines.MongoPipeline: 400,
}



MONGO_URI = mongodb://admin:123456@localhost/
MONGO_DB = choushibaike

 

第七步:

运行项目

scrapy crawl baike

【菜鸟学Python】使用Scrapy框架爬取糗事百科

原文:https://www.cnblogs.com/liduo0413/p/11687319.html

(0)
(0)
   
举报
评论 一句话评论(0
关于我们 - 联系我们 - 留言反馈 - 联系我们:wmxa8@hotmail.com
© 2014 bubuko.com 版权所有
打开技术之扣,分享程序人生!