Adaption of my dumpToDiskViaFileSystemAPI.js Gist to free playlist data from Rhapsody

collectPlaylistsFromRhapsody.js

// Define the success callback for webkitRequestFileSystem()
function onInitFs(fs) {
 
    // Grab each playlist element from the Rhapsody Playlists view, collect data for the playlist
    // then invoke the 'Add to Mixer' url to collect the playlist JSON
    $('#content-frame li').each(function () {

        // Markup template:
        // <li class="playlist playlist-item" href="/members/071tm1/playlists/mp.154595841" playlist_id="mp.154595841" playlist_name="2007-05">
        var $this = $(this),
            fileName = $this.attr('playlist_name') + '.js';

        // Now execute an xhr to collect the playlist json and finally save the results to disk
        $.ajax({
            url: $this.attr('href') + '/queue', // Url to collect playlist json is built by simply appending /queue to path
            dataType: 'text',
            success: function (jsonResults) {
                
                // Begin the persist operation
                fs.root.getFile(fileName, { create: true }, function (fileEntry) {

                    // Create a FileWriter object for our FileEntry
                    fileEntry.createWriter(function (fileWriter) {

                        fileWriter.onwriteend = function (e) {
                            console.log('Write completed.');
                        };

                        fileWriter.onerror = function (e) {
                            console.log('Write failed: ' + e.toString());
                        };

                        // Create a new Blob and write to the output stream/FileWriter
                        fileWriter.write(new Blob([jsonResults], { type: "text/plain" }));

                    }, errorHandler);

                }, errorHandler);
            }
        });
    });
}
 
// Request persistent storage and when allowed, call into webkitRequestFileSystem and thus onInitFS
window.webkitStorageInfo.requestQuota(PERSISTENT, 1024 * 1024, function (grantedBytes) {
    window.webkitRequestFileSystem(PERSISTENT, grantedBytes, onInitFs, errorHandler);
}, errorHandler);
 
function errorHandler(e) {
    var msg = '';
 
    switch (e.code) {
        case FileError.QUOTA_EXCEEDED_ERR:
            msg = 'QUOTA_EXCEEDED_ERR';
            break;
        case FileError.NOT_FOUND_ERR:
            msg = 'NOT_FOUND_ERR';
            break;
        case FileError.SECURITY_ERR:
            msg = 'SECURITY_ERR';
            break;
        case FileError.INVALID_MODIFICATION_ERR:
            msg = 'INVALID_MODIFICATION_ERR';
            break;
        case FileError.INVALID_STATE_ERR:
            msg = 'INVALID_STATE_ERR';
            break;
        default:
            msg = 'Unknown Error';
            break;
    };
 
    console.log('Error: ' + msg);
}