Screencast of what to do is here: https://streamus.com/grooveshark.swf

groovebackup.comscript.js

//  RUN THIS CODE ON groovebackup.com's console, see screencast for more info.

var playlistTitleAndEntryList = [];

function recursiveParseLinks(links, callback){
   if(links.length > 0){
       var link = links.shift();
       
        if(link.href.indexOf('exportPlaylist') !== -1){
            var xmlHttpRequest = new XMLHttpRequest();

            xmlHttpRequest.onreadystatechange = function(){
                if (xmlHttpRequest.readyState == 4 ) {
                    var rows = xmlHttpRequest.responseText.split('\n');
                    var nonHeaderRows = rows.slice(1, rows.length);

                    var titleList = [];
                    nonHeaderRows.forEach(function(row){
                        var columns = row.split(',');
                        if(columns.length === 3){
                            //  Column[0] is Song name,
                            //  Column[1] is artist
                            var entry = columns[1] + ' ' + columns[0];
                            entry = entry.replace(/"/g, "");
                            titleList.push(entry);
                        }
                    });
                    
                    if(titleList.length > 0){
                        playlistTitleAndEntryList.push({
                            title: link.innerHTML,
                            titleList: titleList
                        });
                    }
                    

                    recursiveParseLinks(links, callback);
                }
            };

            console.log('Working...');
            xmlHttpRequest.open('get', link.href, true);
            xmlHttpRequest.send();
        }
        else {
            recursiveParseLinks(links, callback);
        }
       
   } else {
       callback();
   }
}

var foundLinks = Array.prototype.slice.call(document.querySelectorAll('a'));
recursiveParseLinks(foundLinks, function(){
    console.log('Data scrape - COMPLETE. TAKE THIS DATA TO STREAMUS.');
    console.log(JSON.stringify(playlistTitleAndEntryList));
});

streamus.comscript.js

//  Run this code on streamus' extension background page.
//  YOU MUST MODIFY THIS CODE BY COPY/PASTING IN YOUR PLAYLIST INFO FROM THE ABOVE PAGE INTO THE VARIABLE BELOW.
//  See screencast for more details.

var playlistsToImport = null;

var YouTubeV3API = require('background/model/youTubeV3API');
var GroovesharkImporter = function() {
    this.getPlaylistSongs = function(playlist, foundSongs, onCompleteCallback) {
        if (playlist.titleList.length > 0) {
            var title = playlist.titleList.shift();

            this.searchAndAddByTitle({
                title: title,
                foundSongs: foundSongs,
                playlist: playlist,
                error: function(error) {
                    console.error('Failed to add song by title: ' + title, error);
                },
                complete: this.getPlaylistSongs.bind(this, playlist, foundSongs, onCompleteCallback)
            });
        }
        else {
            console.log('Complete, found songs:', foundSongs.length, foundSongs);
            onCompleteCallback({
                playlist: playlist,
                foundSongs: foundSongs
            });
        }
    };

    this.searchAndAddByTitle = function(options) {
        YouTubeV3API.getSongByTitle({
            title: options.title,
            success: function(song) {
                options.foundSongs.push(song);

                if (options.success) {
                    options.success();
                }
            }.bind(this),
            error: options.error,
            complete: options.complete
        });
    };
};

var groovesharkImporter = new GroovesharkImporter();

//  Iterate over each playlist that I need to create, search for its songs, then call addPlaylistWithSongs.
function importPlaylists(playlistsToImport) {
    if (playlistsToImport.length > 0) {
        console.log('Working...');
        var playlistToImport = playlistsToImport.shift();

        groovesharkImporter.getPlaylistSongs(playlistToImport, [], function(response) {
            var playlists = window.signInManager.get('signedInUser').get('playlists');
            playlists.addPlaylistWithSongs(response.playlist.title, response.foundSongs);

            //  Import one playlist every 5 seconds to not break my server.
            setTimeout(function() {
                importPlaylists(playlistsToImport);
            }, 3000);
        });

    } else {
        console.log('done');
    }
}

importPlaylists(playlistsToImport);