Scrapy爬虫实战：使用代理访问

冷不防 2022-04-11 12:23 376阅读 0赞

### Scapy爬虫实战：使用代理访问 ###

*  Middleware 中间件设置代理
 *   *  middlewares.py
     *  settings.py
     *  spider
 *  配置meta使用proxy
 *  快代理

[前面我们简单的设置了headers就可以骗过ip138.com][headers_ip138.com]，但是绝大多数比较复杂的网站就不是那么好骗的了，这个时候我们需要更高级的方案，富人靠科技，穷人靠变异，如果不差钱的话，可以考虑VPN，也可以使用免费的代理。我们这里试着使用代理。

# Middleware 中间件设置代理 #

## [middlewares.py][] ##

from tutorial.settings import PROXIES
    
    class TutorialDownloaderMiddleware(object):
        def process_request(self, request, spider):
            request.meta['proxy'] = "http://%s" % random.choice(PROXIES)
            return None

## [settings.py][] ##

PROXIES = [
        '113.59.59.73:58451',
        '113.214.13.1:8000',
        '119.7.192.27:8088',
        '60.13.74.183:80',
        '110.180.90.181:8088',
        '125.38.239.199:8088'
    ]
    
    # Enable or disable downloader middlewares
    # See https://doc.scrapy.org/en/latest/topics/downloader-middleware.html
    DOWNLOADER_MIDDLEWARES = { 
        'tutorial.middlewares.TutorialDownloaderMiddleware': 1,
    }

## spider ##

# -*- coding: utf-8 -*-
    import scrapy
    
    class Ip138Spider(scrapy.Spider):
        name = 'ip138'
        allowed_domains = ['www.ip138.com','2018.ip138.com']
        start_urls = ['http://2018.ip138.com/ic.asp']
        
        def parse(self, response):
            print("*" * 40)
            print("response text: %s" % response.text)
            print("response headers: %s" % response.headers)
            print("response meta: %s" % response.meta)
            print("request headers: %s" % response.request.headers)
            print("request cookies: %s" % response.request.cookies)
            print("request meta: %s" % response.request.meta)

运行结果如下：  
![middleware][]

# 配置meta使用proxy #

# -*- coding: utf-8 -*-
    import scrapy
    
    class Ip138Spider(scrapy.Spider):
        name = 'ip138'
        allowed_domains = ['www.ip138.com','2018.ip138.com']
        start_urls = ['http://2018.ip138.com/ic.asp']
    
        def start_requests(self):
            for url in self.start_urls:
                yield scrapy.Request(url, meta={ 'proxy':'http://116.62.134.173:9999'} ,callback=self.parse)
    
        def parse(self, response):
            print("*" * 40)
            print("response text: %s" % response.text)
            print("response headers: %s" % response.headers)
            print("response meta: %s" % response.meta)
            print("request headers: %s" % response.request.headers)
            print("request cookies: %s" % response.request.cookies)
            print("request meta: %s" % response.request.meta)

运行结果  
![spider][]

# 快代理 #

我们可以使用上一些免费代理 [https://www.kuaidaili.com/free/inha/][https_www.kuaidaili.com_free_inha]  
![kuaidaili][]

速度比较满，但是还可以用。

[GitHub源代码][GitHub]

[headers_ip138.com]: http://xn--headersip138-675sz5b0ct50ejiep9cu56detycg9g95waf8tmr1ehdva2f9b4ds.com
[middlewares.py]: http://middlewares.py
[settings.py]: http://settings.py
[middleware]: /images/20220411/5eea83e218fe4159a0044c0a873fba39.png
[spider]: /images/20220411/e4e25d64c6994db78f655b004631c2ea.png
[https_www.kuaidaili.com_free_inha]: https://www.kuaidaili.com/free/inha/
[kuaidaili]: /images/20220411/d6ce2954c5a441c08cf5f0797171379f.png
[GitHub]: https://github.com/Jaysong2012/tutorial