Last.fm無效方法簽名（playlist.addTrack）

我試圖在命令行上爲last.fm上的某個播放列表添加一個「藝術家 - 歌曲」條目。Last.fm無效方法簽名（playlist.addTrack）

我申請了一個API密鑰並獲得了一個會話密鑰，如last.fm API documentation中所述。我使用user.getplaylist（$ PLID）獲得播放列表ID。

該服務需要客戶端發送數據作爲寫入任何方法的POST請求。對於我已決定使用捲曲-d

這裏是add_track.sh的內容：

SERVICE=http://ws.audioscrobbler.com/2.0/ 
    APIKEY=1dfdc3a278e6bac5c76442532fcd6a05 # mpc-last 
    SECRET=<md5hash: api secret> 
    LASTFM_USER=<string: myuser> 
    LASTFM_SK=<md5hash: valid session key> 

    # parameters (sorted alphabetically becasue method signature requires them to be) 
    # api_key (Required) : A Last.fm API key. 
    # api_sig (Required) : A Last.fm method signature. See authentication for more information. 
    # artist (Required) : The artist name that corresponds to the track to be added. 
    # method playlist.addTrack 
    # playlistID (Required) : The ID of the playlist - this is available in user.getPlaylists. 
    # sk (Required) : A session key generated by authenticating a user via the authentication protocol. 
    # track (Required) : The track name to add to the playlist. 

    METHOD=playlist.addtrack 
    ARTIST=prodigy 
    TRACK=breathe 
    PLID=8698647 

    MS="api_key${APIKEY}"                    # api_sig can't be here because it's not produced yet, obviously 
    MS="${MS}artist${ARTIST}"                   MS="${MS}method${METHOD}"                   MS="${MS}playlistid${PLID}" # tried with playlistID too 
    MS="${MS}track${TRACK}"     
    #MS="${MS}sk${LASTFM_SK}" # including this does not help 
    MS="${MS}${SECRET}" 

    # hash it 
    MS=`echo -n $MS | md5sum | cut -d' ' -f1` 

    # call the service. 
    # args also sorted alphabetically, but this should definitely not matter 
    curl \ 
    -d api_key=${APIKEY} \ 
    -d api_sig=${MS} \ 
    -d artist=${ARTIST} \ 
    -d method=${METHOD} \ 
    -d playlistID=${PLID} \ 
    -d sk=${LASTFM_SK} \ 
    -d track=${TRACK} \ 
    $SERVICE

然後調用該服務：

$ ./add_track.sh 
<?xml version="1.0" encoding="utf-8"?> 
<lfm status="failed"> 
<error code="13">Invalid method signature supplied</error></lfm>

來源

2011-06-26 Ярослав Рахматуллин

參考：

curl -v \ 
    -d "api_key=`perl -e 'use Encode; printf "%s", encode_utf8($ARGV[0])' ${APIKEY}`" \ 
    -d "api_sig=`perl -e 'use Encode; printf "%s", encode_utf8($ARGV[0])' ${MS}`"  \ 
    -d  "artist=`perl -e 'use Encode; printf "%s", encode_utf8($ARGV[0])' ${ARTIST}`" \ 
    -d  "method=`perl -e 'use Encode; printf "%s", encode_utf8($ARGV[0])' ${METHOD}`" \ 
    -d "playlistID=`perl -e 'use Encode; printf "%s", encode_utf8($ARGV[0])' ${PLID}`"  \ 
    -d   "sk=`perl -e 'use Encode; printf "%s", encode_utf8($ARGV[0])' ${LASTFM_SK}`" \ 
    -d  "track=`perl -e 'use Encode; printf "%s", encode_utf8($ARGV[0])' ${TRACK} `" \ 
$SE

.... 從一開始就可能使用perl更好： http://www.easyclasspage.de/lastfm/seite-11.html

來源

2011-06-27 04:10:57

Last.fm無效方法簽名（playlist.addTrack）

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