Html5游戏开发攻略（免费的音乐面包篇）

这一篇我们来尝尝免费的面包，至少目前是这样的。

QQ音乐相信大家或多或少都使用过，里面的音乐资源非常多。

这个时候你可能就明白了，没错，我们要在游戏中使用QQ音乐的资源当背景音乐~~~~~哦耶~！

咳咳，不过呢，由于QQ音乐在线接口是加密的，所以我们需要一系列工作来解密并调用。可要做好准备哟！

先放一张预览图：

过程其实很简单。

第一步：申请QQ音乐服务器访问权限。

第二步：获取不同的音乐列表（根据你的选择获取到）。

第三步：根据不同列表进行分析。

第四步：获取音乐信息。

第五步：从音乐信息中分析数据。

第六步：播放音乐。

 

/*
    QQ音乐插件
*/
void function (w) {

    // QQ音乐对象
    var QQMusic = {};

    setInterval(function getJurisdiction() {
        /// <summary>申请QQ音乐服务器访问权限</summary>

        injectScript("http://qzone-music.qq.com/fcg-bin/fcg_set_musiccookie.fcg?fromtag=31");
        return getJurisdiction;
    }(), 3 * 60 * 1000);

    function injectScript(url) {
        /// <summary>引用脚本</summary>
        /// <param name="url" type="String">地址</param>

        var oScript = document.createElement("script");
        oScript.src = url;
        oScript.charset = 'gb2312';
        document.body.appendChild(oScript);
        document.body.removeChild(oScript);
    }

    function getAlbumPicture(albumId) {
        /// <summary>获取专辑图片</summary>
        /// <param name="albumId" type="Number">专辑编号</param>
        /// <returns type="String">专辑图片地址</returns>

        return "http://imgcache.qq.com/music/photo/album/" + parseInt(albumId) % 100 + "/albumpic_" + albumId + "_0.jpg";
    }

    function getSingerPicture(singerId) {
        /// <summary>获取歌手图片</summary>
        /// <param name="singerId" type="Number">歌手编号</param>
        /// <returns type="String">歌手图片地址</returns>

        return "http://imgcache.qq.com/music/photo/singer/" + parseInt(singerId) % 100 + "/singerpic_" + singerId + "_0.jpg";
    }

    // 回调函数
    var cb = null;

    QQMusic.getGuessYouLike = function (callback) {
        /// <summary>获取猜你喜欢列表</summary>
        /// <param name="callback" type="Function">回调函数</param>

        var lableId = [];
        for (var i = 118; i < 142; i++) {
            lableId.push(i);
        }
        lableId.push(150, 160);

        window.JsonCallBack = window.SongRecCallback = listAnalysis;

        cb = callback;

        injectScript("http://radio.cloud.music.qq.com/fcgi-bin/qm_guessyoulike.fcg?labelid=" + lableId[(lableId.length * Math.random()) | 0] + "&start=0&num=20&rnd=" + new Date().getTime());
    };

    QQMusic.searchSongs = function (key, callback) {
        /// <summary>搜索歌曲</summary>
        /// <param name="key" type="String">关键字</param>
        /// <param name="callback" type="Function">回调函数</param>

        cb = callback;

        key = encodeURI(key);

        window.MusicJsonCallBack = searchAnalysis;

        injectScript("http://s.plcloud.music.qq.com/fcgi-bin/smartbox.fcg?o_utf8=1&utf8=1&key=" + key + "&inCharset=GB2312&outCharset=utf-8");
    };

    QQMusic.getSongInfo = function (song, callback) {
        /// <summary>获取歌曲信息</summary>
        /// <param name="key" type="Object">歌曲对象</param>
        /// <param name="callback" type="Function">回调函数</param>

        cb = function (info) {
            info.name = song.name;
            info.singer = song.singer;
            info.imgUrl = getAlbumPicture(song.albumId);
            callback(info);
        };

        window.JsonCallback = musicAnalysis;

        injectScript("http://qzone-music.qq.com/fcg-bin/fcg_mv_getinfo_bysongid.fcg?mids=" + song.mid + "&uin=10000&loginUin=0&hostUin=0&outCharset=utf-8");
    };

    function listAnalysis(data) {
        /// <summary>随机音乐列表解析</summary>
        /// <param name="data" type="Array">随机列表数据</param>

        var playList = [];
        var regexp = new RegExp('(upload|stream)(\d+)\.(music\.qzone\.soso\.com|qqmusic\.qq\.com)\/(\d+)\.wma');
        var replacement = function (word, x, a, y, b) {
            return 'stream' + (10 + Number(a)) + '.qqmusic.qq.com/' + (18000000 + Number(b)) + '.mp3';
        };
        var songs = data.songs;
        for (var i = 0; i < songs.length; ++i) {
            var song = songs[i];
            var args = decodeURIComponent(song.data).replace(/+/g, ' ').split('|');
            var singerId = args[2];
            var albumId = args[4];
            var name = args[1];
            var singer = args[3];
            playList.push({
                name: name,
                singer: singer,
                url: decodeURIComponent(song.url).replace(regexp, replacement),
                imgUrl: getAlbumPicture(albumId),
                singerImgUrl: getSingerPicture(singerId)
            });
        }
        cb && cb(playList);
    };

    function searchAnalysis(data) {
        /// </summary>搜索列表解析</summary>
        /// <param name="data" type="Array">搜索列表数据</param>

        var songs = data.tips.song;
        var albums = data.tips.album;
        for (var i = songs.length; i--;) {
            songs[i] = {
                id: songs[i].id,
                mid: songs[i].mid,
                name: songs[i].name,
                singer: songs[i].singer_name,
                albumId: function () {
                    for (var n = 0; n < albums.length; n++) {
                        if (albums[n].singer_name == songs[i].singer_name) {
                            return albums[n].id;
                        }
                    }
                }()
            };
        }
        cb && cb(songs);
    };

    function musicAnalysis(data) {
        /// <summary>单曲音乐解析</summary>
        /// <param name="data" type="Object">单曲音乐源数据</param>

        cb && cb({
            url: 'http://stream' + (10 + Number(data.num)) + '.qqmusic.qq.com/' + (30000000 + Number(data.mvlist[0].songid)) + '.mp3'
        });
    };

    w.QQMusic = QQMusic;
}(window);

OK！~写好后我们怎么样才能获得数据并播放呢？

好，下面请看~

假设我们要获取到随机歌曲列表，那么只需要调用 

QQMusic.getGuessYouLike(function(list){
    loadNewMusic(list[0]);
});

然后~我们再写一个loadNewMusic函数来播放它就可以了~

  

function loadNewMusic(musicInfo){
    /// <summary>加载新音乐</summary>
    /// <param name="musicInfo" type="Object">音乐信息</param>

    var audio = new Audio();
    audio.autoplay=true;
    audio.src=musicInfo.url;
    audio.load();
}

Ok!运行一下吧！？