设置随机请求头 fake_useragent

下载安装随机请求头库

pip install fake_useragent

导包

from fake_useragent import UserAgent

ua=UserAgent(use_cache_server=False)

随机获取一个请求头

print(ua.random)

随机指定ua

print(ua.firefox)
print(ua.ie)
print(ua.chrome)

报错后 FakeUserAgentError(‘Maximum amount of retries reached’)

尝试以下方法

不缓存数据：
ua = UserAgent(cache=False)

忽略ssl验证：
ua = UserAgent(verify_ssl=False)

禁用服务器缓存：
ua = UserAgent(use_cache_server=False)

下载
https://fake-useragent.herokuapp.com/browsers/0.1.11 并另存为：fake_useragent.json
自己手动添加

2、使用实例，直接上代码

from fake_useragent import UserAgent
ua = UserAgent()

ua.ie
# Mozilla/5.0 (Windows; U; MSIE 9.0; Windows NT 9.0; en-US);
ua.msie
# Mozilla/5.0 (compatible; MSIE 10.0; Macintosh; Intel Mac OS X 10_7_3; Trident/6.0)'
ua['Internet Explorer']
# Mozilla/5.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; GTB7.4; InfoPath.2; SV1; .NET CLR 3.3.69573; WOW64; en-US)
ua.opera
# Opera/9.80 (X11; Linux i686; U; ru) Presto/2.8.131 Version/11.11
ua.chrome
# Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.2 (KHTML, like Gecko) Chrome/22.0.1216.0 Safari/537.2'
ua.google
# Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_4) AppleWebKit/537.13 (KHTML, like Gecko) Chrome/24.0.1290.1 Safari/537.13
ua['google chrome']
# Mozilla/5.0 (X11; CrOS i686 2268.111.0) AppleWebKit/536.11 (KHTML, like Gecko) Chrome/20.0.1132.57 Safari/536.11
ua.firefox
# Mozilla/5.0 (Windows NT 6.2; Win64; x64; rv:16.0.1) Gecko/20121011 Firefox/16.0.1
ua.ff
# Mozilla/5.0 (X11; Ubuntu; Linux i686; rv:15.0) Gecko/20100101 Firefox/15.0.1
ua.safari
# Mozilla/5.0 (iPad; CPU OS 6_0 like Mac OS X) AppleWebKit/536.26 (KHTML, like Gecko) Version/6.0 Mobile/10A5355d Safari/8536.25

# and the best one, random via real world browser usage statistic
ua.random

3、值得注意的几点

1.fake-useragent会在本地系统的临时文件里面储存UserAgent数据，比如/tmp文件夹中。

如果想更新以保存的本地数据，可以用下面的方法：

from fake_useragent import UserAgent
ua = UserAgent()
ua.update()

如果不想缓存本地数据文件，可以在建立UserAgent实例的时候设置参数’cache=False’

from fake_useragent import UserAgent
ua = UserAgent(cache=False)