python抓取网页内容并下载图片

以你之姓@ 2022-05-25 11:51 293阅读 0赞

使用python抓取网页内容，并且下载网页内容中的图片。

使用urllib库抓取网页内容，该库是python自带，不需要安装。

由于我这边抓取的是国外的网站，用到了代理，且设置User-Agent防止网站对没有User-Agent的请求过滤

爬虫类代码Scrapy.py：

import urllib.request
    
    class Scrapy:
    
    	proxy = ''
    	opener = ''
    	proxy_host = '192.168.88.17:8333'
    	user_agent = 'Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.170 Safari/537.36'
    	values = {'test':1}
    	headers = ''
    
    	def __init__(self):
    		self.headers = {
    			'User-Agent':self.user_agent,
    			'Host':'mangakakalot.com',
    			'Accept':'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8',
    			'Accept-Encoding':'gzip, deflate',
    			'Accept-Language':'zh-CN,zh;q=0.9',
    			'Cache-Control':'max-age=0',
    			'Proxy-Connection':'keep-alive',
    			'Upgrade-Insecure-Requests':'1'
    		}
    
    	# 设置代理
    	def setProxy(self):
    		self.proxy = urllib.request.ProxyHandler({'http': self.proxy_host})
    		self.opener = urllib.request.build_opener(self.proxy, urllib.request.HTTPHandler)
    
    	# 获取网页内容
    	def getHtml(self, url):
    		self.setProxy()
    		urllib.request.install_opener(self.opener)
    		req = urllib.request.Request(url, urllib.parse.urlencode(self.values).encode(encoding='UTF8'), {'User-Agent':self.user_agent})
    		return urllib.request.urlopen(req).read().decode('utf8')
    
    	# 下载图片
    	def downImg(self, url, folder, filename):
    		self.setProxy()
    		self.opener.addheaders = [('User-Agent', self.user_agent)]
    		urllib.request.install_opener(self.opener)
    		urllib.request.urlretrieve(url, folder + filename)

调用例子：

# -*- coding: UTF-8 -*-
    from Scrapy import Scrapy
    
    scrapy = Scrapy()
    # 抓取网页内容
    html = scrapy.getHtml('http://xxxxxxxxxx')
    
    # 下载地址
    scrapy.downImg('http://xxxxxxxxxx.jpg', './data/pic/', 'xx.jpg')