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当python爬虫遇到10060错误_html/css_WEB-ITnose

Jun 21, 2016 am 08:50 AM

相信做过网站爬虫工作的同学都知道,python的urllib2用起来很方便,使用以下几行代码就可以轻松拿到某个网站的源码:

#coding=utf-8import urllibimport urllib2import reurl = "http://wetest.qq.com"request = urllib2.Request(url)page = urllib2.urlopen(url)html = page.read()print html
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最后通过一定的正则匹配,解析返回的响应内容即可拿到你想要的东东。

但这样的方式在办公网和开发网下,处理部分外网站点时则会行不通。

比如: http://tieba.baidu.com/p/2460150866 ,执行时一直报10060的错误码,提示连接失败。

#coding=utf-8import urllibimport urllib2import reurl = "http://tieba.baidu.com/p/2460150866"request = urllib2.Request(url)page = urllib2.urlopen(url)html = page.read()print html
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执行后,错误提示截图如下:

为了分析这一问题的原因,撸主采用了如下过程:

1、在浏览器里输入,可以正常打开,说明该站点是可以访问的。

2、同样的脚本放在公司的体验网上运行OK,说明脚本本身没有问题。

通过以上两个步骤,初步判断是公司对于外网的访问策略限制导致的。于是查找了下如何给urllib2设置ProxyHandler代理 ,将代码修改为如下:

#coding=utf-8import urllibimport urllib2import re# The proxy address and port:proxy_info = { 'host' : 'web-proxy.oa.com','port' : 8080 }# We create a handler for the proxyproxy_support = urllib2.ProxyHandler({"http" : "http://%(host)s:%(port)d" % proxy_info})# We create an opener which uses this handler:opener = urllib2.build_opener(proxy_support)# Then we install this opener as the default opener for urllib2:urllib2.install_opener(opener)url = "http://tieba.baidu.com/p/2460150866"request = urllib2.Request(url)page = urllib2.urlopen(url)html = page.read()print html
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再次运行,可以拿到所要的Html页面了。到这里就完了么?没有啊!撸主想拿到贴吧里的各种美图,保存在本地,上代码吧:

#coding=utf-8import urllibimport urllib2import re# The proxy address and port:proxy_info = { 'host' : 'web-proxy.oa.com','port' : 8080 }# We create a handler for the proxyproxy_support = urllib2.ProxyHandler({"http" : "http://%(host)s:%(port)d" % proxy_info})# We create an opener which uses this handler:opener = urllib2.build_opener(proxy_support)# Then we install this opener as the default opener for urllib2:urllib2.install_opener(opener)url = "http://tieba.baidu.com/p/2460150866"request = urllib2.Request(url)page = urllib2.urlopen(url)html = page.read()#正则匹配reg = r'src="(.+?\.jpg)" pic_ext'imgre = re.compile(reg)imglist = re.findall(imgre,html)print 'start dowload pic'x = 0for imgurl in imglist:urllib.urlretrieve(imgurl,'pic\\%s.jpg' % x)x = x+1
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再次运行,发现还是有报错!尼玛!又是10060报错,我设置了urllib2的代理了啊,为啥还是报错!

于是撸主继续想办法,一定要想拿到贴吧里的各种美图。既然通过正则匹配可以拿到贴吧里的图片的url,为何不手动去调用urllib2.urlopen去打开对应的url,获得对应的response,然后read出对应的图片二进制数据,然后保存图片到本地文件。于是有了下面的代码:

#coding=utf-8import urllibimport urllib2import re# The proxy address and port:proxy_info = { 'host' : 'web-proxy.oa.com','port' : 8080 }# We create a handler for the proxyproxy_support = urllib2.ProxyHandler({"http" : "http://%(host)s:%(port)d" % proxy_info})# We create an opener which uses this handler:opener = urllib2.build_opener(proxy_support)# Then we install this opener as the default opener for urllib2:urllib2.install_opener(opener)url = "http://tieba.baidu.com/p/2460150866"request = urllib2.Request(url)page = urllib2.urlopen(url)html = page.read()#正则匹配reg = r'src="(.+?\.jpg)" pic_ext'imgre = re.compile(reg)imglist = re.findall(imgre,html)x = 0print 'start'for imgurl in imglist:print imgurlresp = urllib2.urlopen(imgurl)respHtml = resp.read()picFile = open('%s.jpg' % x, "wb")picFile.write(respHtml)picFile.close()x = x+1print 'done'
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再次运行,发现图片的url按预期的打印出来,并且图片也被保存下来了:

至此,已完成撸主原先要做的目的。哈哈,希望总结的东东对其他小伙伴也有用。

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