scrobble.js

/*
 * Copyright (C) 2013   Daniel Holm <d.holmen@gmail.com>
 *                      Victor Thompson <victor.thompson@gmail.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 3.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

// VARIABLES
var api_key = "07c14de06e622165b5b4d55deb85f4da"
var secret_key = "14125657da06bcb14919e23e2f09de32"
var scrobble_urls = "https://ws.audioscrobbler.com/2.0/" // secure
var scrobble_urlp = "http://ws.audioscrobbler.com/2.0/" // plain

// FUNCTIONS

// Custom debug funtion that's easier to shut off
function customdebug(text) {
    var debug = "1"; // set to "0" for not debugging
    if (debug === "1") {
        console.debug("Debug: "+text);
    }
}

function request(URL,TYPE) {
    customdebug(URL); // print presentet URL
    customdebug(TYPE); // print presentet URL

    var xhr = new XMLHttpRequest(); // create new XMLHttpRequest
    var encodedURL = encodeURIComponent(URL); // Make sure whatever you post is URI encoded
    xhr.open(TYPE, encodedURL, true); // only async supported
    xhr.send(); // send the data

    //xhr.setRequestHeader("User-Agent", "Music-App/"+appVersion);
    //xhr.setRequestHeader('Content-Type', 'text/xml');

    // did it work?
    if (xhr.readyState==4 && xhr.status === 200) {
        customdebug("Response = " + xhr.responseText);
    }

    else {
        // This is very handy for finding out why your web service won't talk to you
        customdebug("Status: " + xhr.status + ", Status Text: " + xhr.statusText + ", Ready state: "+xhr.readyState);
    }

    return xhr.responseText;
}

function authenticate(username,password) {
    // send to scrobble_url
    var signature = auth_signature(username,password);
    var params = "?method=auth.getMobileSession&api_key="+api_key+"&api_sig="+signature+"&username="+username+"&password="+password;
    var lastfmURL = scrobble_urls+params;

    customdebug("URL to auth: "+lastfmURL);

    var answer = request(lastfmURL,"POST"); // send the request to the function
    customdebug("Request answered: "+answer);

    var loginstate = answer.getElementsByTagName("status").innerHTML; // get the status from the answer

    // get the key
    var lfm = answer.getElementsByTagName("lfm");
    var session = answer.getElementsByTagName("session");
    var session_key = session.getElementsByTagName("key");

    customdebug("Session key: "+session_key);
    customdebug("Login answer: "+loginstate);

    return loginstate;
}

// mobile authentication
function auth_signature(username,password) {
    var signature = Qt.md5("api_key"+api_key+"methodauth.getMobileSessionpassword"+password+"username"+username+secret_key)
    customdebug("Signature: "+signature);
    return signature
}