Scrobble using web services authentication token

[Owen Meyers]

Hello,

I would like to submit a scrobble using a web services authentication
token (session_key), instead of a standard authentication token
(username + password). But looking at the Scrobbler class, I see that
the scrobble handshake is performed using:

token = md5(md5(password) + timestamp)

When I change the code to:

token = md5(shared_secret + timestamp)

(where shared_secret = network.session_key), I get a "Bad
authentication token" error. I know the token is valid because I can
'love' a track using the same network. Should this work, or am I doing
something wrong?

Best,
Owen.

[Amr Hassan]

Hey Owen,

Create a Network object using an api_key, api_secret and either the
session_key or the username and password_hash arguments. That should
authenticate the object, then use Network.get_scrobbler() to obtain a
Scrobbler object and use that instead.

-- Amr

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[Owen Meyers]

Hi Amr, thanks for the reply. However, I am already the
get_scrobbler() command when I get the error. For example:

import pylast, time
API_KEY = 'XXX'
API_SECRET = 'XXX'
n = pylast.get_lastfm_network(API_KEY, API_SECRET)
sg = pylast.SessionKeyGenerator(n)
url = sg.get_web_auth_url()
# open url in webbrowser and authenticate
sk = sg.get_web_auth_session_key(url)
nw = pylast.get_lastfm_network(API_KEY, API_SECRET, sk)
scrob = nw.get_scrobbler('tst', '1.0')
scrob.scrobble('Owen Meyers', 'I Like It', int(time.time()),
pylast.SCROBBLE_SOURCE_USER, pylast.SCROBBLE_MODE_PLAYED, 337)
>>> ScrobblingError: Invalid/Missing Parameter(s)

nw.username
>>> ''
nw.password_hash
>>> ''

Here we see that the network username and password are empty, which I
assume is the reason for the ScrobblingError: Invalid/Missing
Parameter(s). If I add the username, as such:

u = str(nw.get_authenticated_user())
nw = pylast.get_lastfm_network(API_KEY, API_SECRET, sk, u)
nw.username
>>> 'hiqlokey'

scrob = nw.get_scrobbler('tst', '1.0')
scrob.scrobble('Owen Meyers', 'I Like It', int(time.time()),
pylast.SCROBBLE_SOURCE_USER, pylast.SCROBBLE_MODE_PLAYED, 337)
>>> BadAuthenticationError: Bad authentication token

This time I get "BadAuthenticationError: Bad authentication token", I
am guessing because the Scrobbler._do_handshake() method is expecting
a password_hash (line 3563), which is empty because we authenticated
using the session_key. I know the token is valid because this works:

track = nw.get_track("Autechre", "Nine")
track.love()

And if i replace the password_hash with the valid session_key, I get
the same error, BadAuthenticationError: Bad authentication token.

Any ideas?

Owen.

On Feb 17, 12:14 pm, Amr Hassan <amr.has...@gmail.com> wrote:
> Hey Owen,
>
> Create a Network object using an api_key, api_secret and either the
> session_key or the username and password_hash arguments. That should
> authenticate the object, then use Network.get_scrobbler() to obtain a
> Scrobbler object and use that instead.
>
> -- Amr
>

[Amr Hassan]

Hey,
Sorry for the delay, but I think I fixed it. Try the latest revision.

-- Amr

[Owen Meyers]

Looks good, thanks!

On Feb 19, 7:34 am, Amr Hassan <amr.has...@gmail.com> wrote:
> Hey,
> Sorry for the delay, but I think I fixed it. Try the latest revision.
>
> -- Amr
>

> >> > pylast is a python wrapper around last.fm's api. the project is hosted athttp://code.google.com/p/pylast/andthe mailing list/group is athttp://groups.google.com/group/pylast