Handle path argument of URL.build, which doesn't start from /

[rominf]

I'm building URL with this line of code:

url = URL(scheme='https', host='profile-srv.kama.gs', path='oauth/token')

Then I pass url to session.post and get 400 error.

When I construct it with:

url = URL(scheme='https', host='profile-srv.kama.gs', path='/oauth/token')

or convert it to str:

url = str(URL(scheme='https', host='profile-srv.kama.gs', path='/oauth/token'))

everything is OK.

I suggest prepending / if path doesn't start with / or, at least, raise an exception.

[asvetlov]

I think the rule should be: URLs with authority (host part not empty) should raise ValueError on processing relative path (not started with /).

Would you provide a patch?

[rominf]

@asvetlov, OK, I will, wait.

[rominf]

@asvetlov, see #243

[asvetlov]

Fixed by #243