https://github.com/requests/toolbelt/blob/f5c86c51e0a01fbc8b3b4e1c286fd5c7cb3aacfa/requests_toolbelt/sessions.py#L6
注意：这使用标准库中的urljoin。当心urljoin的行为。
In [14]: from urlparse import urljoin
In [15]: urljoin('https://localhost/api', '/resource')
Out[15]: 'https://localhost/resource'
In [16]: urljoin('https://localhost/api', 'resource')
Out[16]: 'https://localhost/resource'
In [17]: urljoin('https://localhost/api/', '/resource')
Out[17]: 'https://localhost/resource'
In [18]: urljoin('https://localhost/api/', 'resource')
Out[18]: 'https://localhost/api/resource'
import requests
from functools import partial
def PrefixUrlSession(prefix=None):
if prefix is None:
prefix = ""
else:
prefix = prefix.rstrip('/') + '/'
def new_request(prefix, f, method, url, *args, **kwargs):
return f(method, prefix + url, *args, **kwargs)
s = requests.Session()
s.request = partial(new_request, prefix, s.request)
return s
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