[英]urllib3 download a file using specified user agent
在urllib3
更新用户代理信息的正确方法是什么?
如何检查用户代理信息是否确实已更改并正在使用?
例如:
user_agent = {'user-agent': 'Mozilla/5.0 (Windows NT 6.3; rv:36.0) Gecko/20100101 Firefox/36.0'}
http = urllib3.PoolManager(10, headers=user_agent)
r1 = http.request('GET', 'http://example.com/')
if r1.status is 200:
with open('somefile','w+') as f:
f.write(r1.data)
当我在http
创建一个PoolManager
,我用dir(http)
查看它,看到http.headers
默认为空并更新为指定的用户代理信息,但它是否被使用? 无论如何都要检查而不必查看apache
日志?
并在尝试更新用户代理后实际检查/var/log/apache2/access.log
:
>>> import urllib3
>>> user_agent = {'user-agent': 'Mozilla/5.0 (Windows NT 6.3; rv:36.0) Gecko/20100101 Firefox/36.0'}
>>> http = urllib3.PoolManager(2, headers=user_agent)
>>> r = http.request('GET','localhost')
>>> with open('/var/log/apache2/access.log','r') as f:
... last_line = f.readlines()[-1]
...
>>> last_line
'127.0.0.1 - - [08/Dec/2014:20:42:04 -0500] "GET / HTTP/1.1" 200 461 "-" "-"\n'
header
参数应该是headers
:
http = urllib3.PoolManager(10, header=user_agent)
您可以使用httpbin.org
网站确认标题已正确设置:
>>> import urllib3
>>> user_agent = {'user-agent': 'Mozilla/5.0 (Windows NT 6.3; rv:36.0) ..'}
>>> http = urllib3.PoolManager(10, headers=user_agent)
>>> r1 = http.urlopen('GET', 'http://httpbin.org/headers')
>>> print(r1.data)
{
"headers": {
"Accept-Encoding": "identity",
"Connect-Time": "1",
"Connection": "close",
"Host": "httpbin.org",
"Total-Route-Time": "0",
"User-Agent": "Mozilla/5.0 (Windows NT 6.3; rv:36.0) Gecko/20100101 Firefox/36.0",
"Via": "1.1 vegur",
"X-Request-Id": "5ef53f21-6caf-4e45-8123-98e417cd05ba"
}
}
或者您可以使用数据包分析器(例如Wireshark )。
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