XML RPC changes between 3.7 and 3.9 yield 401 http error

[2QdxY4RzWzUUiLuE at potatochowder.com]

On 2021-02-24 at 15:29:58 +0100,
lucas <lucas at bourneuf.net> wrote:

> I'm currently trying to understand an error when using the dokuwikixmlrpc
> python module, allowing to easily work with DokuWiki RPC interface.
> 
> Another description of the problem :
> 	https://github.com/kynan/dokuwikixmlrpc/issues/8
> 
> Here is the code, tailored to work with the DokuWiki RPC interface:
> 
>     from urllib.parse import urlencode
>     import xmlrpc.client as xmlrpclib
> 
>     URL = 'wiki.example.net'
>     USER = 'user'
>     PASSWD = 'password'
>     USER_AGENT = 'DokuWikiXMLRPC  1.0  for testing'
> 
>     script = '/lib/exe/xmlrpc.php'
>     url = URL + script + '?' + urlencode({'u': USER, 'p': PASSWD})
>     xmlrpclib.Transport.user_agent = USER_AGENT
>     xmlrpclib.SafeTransport.user_agent = USER_AGENT
>     proxy = xmlrpclib.ServerProxy(url)
> 
>     v = proxy.dokuwiki.getVersion()
>     print(v)
> 
> When ran with Python 3.7 (a personnal debian server, or a personal windows
> computer), i obtain the expected 'Release 2018-04-22a "Greebo"' as ouput.
> When ran with Python 3.9 (my personnal, manjaro machine), i obtain the
> following stacktrace:
> 
>     Traceback (most recent call last):
>       File "/home/project/read.py", line 32, in <module>
>         v = proxy.dokuwiki.getVersion()
>       File "/usr/lib/python3.9/xmlrpc/client.py", line 1116, in __call__
>         return self.__send(self.__name, args)
>       File "/usr/lib/python3.9/xmlrpc/client.py", line 1456, in __request
>         response = self.__transport.request(
>       File "/usr/lib/python3.9/xmlrpc/client.py", line 1160, in request
>         return self.single_request(host, handler, request_body, verbose)
>       File "/usr/lib/python3.9/xmlrpc/client.py", line 1190, in
> single_request
>         raise ProtocolError(
>     xmlrpc.client.ProtocolError: <ProtocolError for
> wiki.example.net/lib/exe/xmlrpc.php: 401 Unauthorized>

At the risk of stating the obvious, it might actually be an
authentication problem.  In addition to double checking the password:

(1) make sure all of your certificates (under Arch Linux, on which
Manjaro is based), that's the ca-certificates package) are up to date;
and

(2) check with whoever owns the wiki about any other certificates they
require.

After that, all I know about XML RPC is to avoid it.  :-)

> I don't have the possibility to test this on python 3.8 specifically, but
> since the XML and XMLRPC modules have been updated in 3.8, and since 3.9
> doesn't seems to introduce any change for them, i would expect 3.8 to
> introduce some change that dokuwikixmlrpc has somehow to take into
> consideration.
> 
> Can anyone help me with that one ? I don't know anything about RPC and XML,
> i don't know what i need to do know to fix dokuwikixmlrpc.