lastfm://user/$username/playlist

lastfm://play/tracks/$trackid,$trackid,$trackid
"," is used as Separator and no separator at the end
$trackid = playlist/trackList/track/id returned by xspf.php as explained Above

Fingerprinting is described here: http://blog.last.fm/2007/08/29/audio-fingerprinting-for-clean-metadata

does anyone know how you can get the remaining time from the current song? as i see it you only get the total amount of time of a song

the remaining times can be calculated as: <total time> - <downloaded bytes> 128

hmm im really far now building my windows sidebar last.fm player.

the error im getting now is "FAILED Incorrect Timestamp Format." at the handshake. I'm Using the 1.2 protocol.

the way i create the timestamp is with this javascript code:

    var now = new Date();
    now.setHours(now.getUTCHours(),now.getUTCMinutes(),now.getUTCSeconds(),now.getUTCMilliseconds());
    alert(now.getTime());

as auth code i send a md5

(md5(password)+now.getTime());

oops as auth i ment

md5(md5(password)+now.getTime());

It must be a Unix timestamp, according to wikipedia:

it is the number of seconds elapsed since midnight UTC of January 1, 1970, not counting leap seconds.

You can probably find a javascript that does that somewhere in the wild.

doh.. my fault.

my timestamp was milliseconds instead of seconds.

    var now = new Date();
    now.setHours(now.getUTCHours(),now.getUTCMinutes(),now.getUTCSeconds(),now.getUTCMilliseconds());
    var time = parseInt(now.getTime()/1000.0)

works perfectly

btw im going to build a Windows Vista Sidebar gadget that can play the last.fm stream. I'm writing on my blog how to do this atm. (will be later up today @ http://www.vdcruijsen.net

Did anyone ever get the following error:

response=FAILED error=8

I got this error after changing the radio station with the adjust.php call.

hmm i dont have the response=failed error = 8 anymore. i dont know what happened but now it doesnt come up again.

i do have some last troubles implementing my tool.

my tool can now send handshake. change channel, play the stream. send "now playing" info and can submit/srobble songs.

my only problems are at "now playing" and "submitting/scrobbling". i post these values as a POST request to the server and i get a OK as result back (so you would guess everything is ok) problem is.. it isnt :(

the now playing and submitted songs arent showing up on the website. does anyone know what could be the problem?

here is the submit that i captured with wireshak

POST /protocol_1.2 HTTP/1.1
Accept: */*
Accept-Language: nl
Referer: file://C:\Users\Geert\Desktop\radio\last.fm radio\lastfm.html
Content-Type: application/x-www-form-urlencoded
UA-CPU: x86
Accept-Encoding: gzip, deflate
User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; SLCC1; .NET CLR 2.0.50727; .NET CLR 3.0.04506; .NET CLR 3.5.21022)
Host: 87.117.229.205
Content-Length: 145
Connection: Keep-Alive
Cache-Control: no-cache

s=9b9e2e43701f4a90ba15ac697e77ee7f&a[0]=Razorlight&t[0]=Dalston&i[0]=1199486491&o[0]=L9f12f&r[0]=&l[0]=&b[0]=Up All Night + Bonus Dvd&n[0]=&m[0]=

and this was the response

HTTP/1.1 200 OK
Server: Apache-Coyote/1.1
Pragma: no-cache
Cache-Control: no-cache
Content-Type: text/plain;charset=ISO-8859-1
Date: Fri, 04 Jan 2008 23:44:09 GMT
Connection: close

OK

I dont see whats wrong in this :(

Is there anyway to listen to the radio without logging in?

@vdcr...: Listening to tracks isn't enaugh. You have to scrobb them: http://www.audioscrobbler.net/ The Idea is, that you can add any track - LastFM or not - to your playlist.

@rbok002: No

#rbok002 It's possible, however the process is not yet documented here. I wiresharked a last.fm widget the other day, and using a widget ID it should be possible...

If anyone wants to document that process you're welcome to leave comment here, I don't we'll document it anytime soon...

Hi everybody!

What does the errorcode "5" stand for, which is returned from "adjust.php"?

I have searched but I didn't find a listing of that error-codes.

Hi!

I've posted my problem at last.fm, too. And there is a complete(?) list of codes which can be returned: http://www.lastfm.de/forum/21716/_/380495/1#f5829688

Hello again!

Now I have another problem, I hope you can help me. This is an example playlist, which I get when I request a xpsf (just a part of it):

<playlist version="1" xmlns:lastfm="http://www.audioscrobbler.net/dtd/xspf-lastfm"> <title>My+Neighbourhood</title> <creator>Last.fm</creator> <link rel="http://www.last.fm/skipsLeft">6</link> <trackList>

<track>

<location>http://kingpin6.last.fm/user/87c7b1857cdca5af52fa5b68bed4a068.mp3</location>

In location is the "path"/url to the mp3 file stored, from which my player can play the song (I pass it to a windows media player object in my app). But windows media player can't find that location. What's wrong? Have I missunderstood something?

@hartwig.christian First, thanks for the info about errorcodes... With regards to your app it depends on media players abilities... <location> tag contains the address to a binary mp3 file that you can download using http, as noted in the URI. I don't know if you interface to media player supports http URI or only URLs to local storage, try downloading the song to a temporary file and then play it... But it depends on which platform you're implementing on top of..

To play a full-length track with a track URI (lastfm://play/tracks/012345) try the following url:

http://[base_url]/1.0/webclient/getresourceplaylist.php?sk=[sessionID]&url=[LASTFMURI]&desktop=1

It returns an xspf directly, but when I tried to download the MP3 file, I got a 400 Bad Request.

I found out, you have to send "Cookie: Session=[sessionID]" in the header of the request of the MP3 file.

@jopsen: It's fairly straight-forward to get a radio playlist without signing in (and similar to the regular process):

1. XML-RPC call to

http://ext.last.fm/1.0/webclient/xmlrpc.php

• method: getSession ("<methodCall><methodName>getSession</methodName><params /></methodCall>")
• returns a session id and username "LFM_ANON"

2. Create a timestamp

3. Handshake with the webclient url:

http://ext.last.fm/1.0/radio/webclient/handshake.php?sessionKey=[SESSIONID]&user=LFM_ANON&timestamp=[TIMESTAMP]

returns something like:

session=7a5510dfb03e3eaee9fd44661a91d5c4&playlist_url=http://www.last.fm/flash_getplaylist.php&subscriber=0&base_url=ext.last.fm&base_path=/radio/

4. Adjust the radio station (build the url from returned response in step 3):

http://[base_url][base_path]adjust.php?user=LFM_ANON&session=[SESSIONID]&timestamp=[TIMESTAMP]&url=[LASTFMURI]&lang=en

5. Get the playlist:

[playlist_url]?sk=[SESSIONID]&y=[TIMESTAMP]

(playlist_url returned in step 3) returns base64 + url-encoded playlist

^zomg thanks

I am writing a client and Java, I can sign in, Tune a radio station, and stream the mp3 files. To download the file directly I parse the mp3 from the xspf xml file. When I try to download it I get a HTTP 403 error and a response of invalid ticket. When I tune the radio and request the XML file I send the Cookie: Session=SESSION_ID?. Does anyone have any hints on what I could be missing in my requests?

Hello, I'm just writing a player in javascript. Where do I get the id3 tags from?

If it's a last.fm player you wont find id3 tags, but you may get metadata from the XPSF... If you are writing a javascript mp3 player I have no idea, and this is the wrong place...

Thank you for your answer. Am I right, that with the change to protocol 1.2 the usage has changed as follows: the stream is not played directly from stream_url but i have to get the xspf playlist an then play the streams included? In this case, skipping would noch be the http request to control.php anymore (which doesn't function) but just changing the stream url to the next one from the playlist. It's just to understand the usage of all this stuff, the programing language is not important.

Yes, you are right...

Thank you for your help. I works randomly now. Do I definitly need to send the cookie session with the http mp3 request? If yes, does anybody know how to do this with Windows Media Player?

Hello, me again. I'm still stuck with this problem. In detail: sometimes i get an "invalid ticket - 403" http status code and sometimes not. I've captured the requests using a packet sniffer. The requests are (except the url) exactly the same. Strange is: after having one url which returns no 403, i can skip without problems. Often, I get playable URLs when refreshing the playlist and using the new locations.

PS.: I'll release my javascript API after having done this hole stuff, so it's getting easier for further programers to get through the lastfm streaming system.

I've got no idea... Probably instability at last.fm serverside... That is NOT uncommon... The cookies shouldn't be needed...

Hm I think I've got the reason. Obviously only tracks seem to work which are marked in lastfm as "full length". Perhaps for the other ones, the cookie is needet. I'll try to use a proxy which modifies the http header of media player's request later. I'll keep you up to date. The lastfm software sends this cookie, by the way.

I was able to work around the 403 issue by replacing "kingpin5.last.fm" with "play.last.fm" in the URLs returned by xspf.php. Without sending the Session cookie. Probably a hack, but it seems to do the trick.

@ingmar.runge I've discovered that if you do pass desktop=1.5.1 instead of desktop=1.3.1 when requesting the xspf, you get tracks starting with play.last.fm instead of kinpin5.last.fm... I guess we should just update the client id once in a while :)

Note: documentation have been update with this fix...