网易云和QQ音乐api

　　最近有点闲，听歌的时候遇见好听的想下载却遇到尴尬的事，版权！唉，知道我干什么了吧

网易云音乐

　　获取排行榜中的歌曲列表

　　　　https://music.163.com/discover/toplist?id=

　　　　参数id：左侧分类的id,比如云音乐热歌榜：3778678

　　获取具体歌曲链接

　　　　http://music.163.com/weapi/song/enhance/player/url?csrf_token=&ids=xxx&br=999000

　　　　参数：ids:歌曲id集合，br歌曲码率

　　获取歌词：

　　　　http://music.163.com/weapi/song/lyric?csrf_token=&id=xxx&os=pc&lv-1&kv=-1&tv=-1

　　　　参数：id:歌曲id　　

网易云的参数先经过JSON序列化然后进行加密，所有加密代码：

需要用到的一些Head及参数：

#region 属性
        private string _MODULUS = "00e0b509f6259df8642dbc35662901477df22677ec152b5ff68ace615bb7b725152b3ab17a876aea8a5aa76d2e417629ec4ee341f56135fccf695280104e0312ecbda92557c93870114af6c9d05c4f7f0c3685b7a46bee255932575cce10b424d813cfe4875d3e82047b97ddef52741d546b8e289dc6935b3ece0462db0a22b8e7";
        private string _NONCE = "0CoJUm6Qyw8W8jud";
        private string _PUBKEY = "";
        private string _VI = "";
        private string _USERAGENT = "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36";
        private string _COOKIE = "os=pc;osver=Microsoft-Windows-10-Professional-build-16299.125-64bit;appver=2.0.3.131777;channel=netease;__remember_me=true";
        private string _REFERER = "http://music.163.com/";
        // use keygen in c#
        private string _secretKey;
        private string _encSecKey;
        #endregion

加密方法：

private string CreateSecretKey(int length)
        {
            var str = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
            var r = "";
            var rnd = new Random();
            for (int i = ; i < length; i++)
            {
                r += str[rnd.Next(, str.Length)];
            }
            return r;
        }
        private Dictionary<string, string> Prepare(string raw)
        {
            Dictionary<string, string> data = new Dictionary<string, string>();
            data["params"] = AESEncode(raw, _NONCE);
            data["params"] = AESEncode(data["params"], _secretKey);
            data["encSecKey"] = _encSecKey;

            return data;
        }
        private string RSAEncode(string text)
        {
            string srtext = new string(text.Reverse().ToArray()); ;
            var a = BCHexDec(BitConverter.ToString(Encoding.Default.GetBytes(srtext)).Replace("-", ""));
            var b = BCHexDec(_PUBKEY);
            var c = BCHexDec(_MODULUS);
            var key = BigInteger.ModPow(a, b, c).ToString("x");
            key = key.PadLeft(, '');
            if (key.Length > )
                return key.Substring(key.Length - , );
            else
                return key;
        }

        private BigInteger BCHexDec(string hex)
        {
            BigInteger dec = new BigInteger();
            int len = hex.Length;
            for (int i = ; i < len; i++)
            {
                dec += BigInteger.Multiply(new BigInteger(Convert.ToInt32(hex[i].ToString(), )), BigInteger.Pow(new BigInteger(), len - i - ));
            }
            return dec;
        }

        private string AESEncode(string secretData, string secret = "TA3YiYCfY2dDJQgg")
        {
            byte[] encrypted;
            byte[] IV = Encoding.UTF8.GetBytes(_VI);

            using (var aes = Aes.Create())
            {
                aes.Key = Encoding.UTF8.GetBytes(secret);
                aes.IV = IV;
                aes.Mode = CipherMode.CBC;
                using (var encryptor = aes.CreateEncryptor())
                {
                    using (var stream = new MemoryStream())
                    {
                        using (var cstream = new CryptoStream(stream, encryptor, CryptoStreamMode.Write))
                        {
                            using (var sw = new StreamWriter(cstream))
                            {
                                sw.Write(secretData);
                            }
                            encrypted = stream.ToArray();
                        }
                    }
                }
            }
            return Convert.ToBase64String(encrypted);
        }
        private string CURL(string url, Dictionary<string, string> parms, string method = "POST")
        {
            string result;
            using (var wc = new WebClient())
            {
                wc.Headers.Add(HttpRequestHeader.ContentType, "application/x-www-form-urlencoded");
                wc.Headers.Add(HttpRequestHeader.Referer, _REFERER);
                wc.Headers.Add(HttpRequestHeader.UserAgent, _USERAGENT);
                wc.Headers.Add(HttpRequestHeader.Cookie, _COOKIE);
                var reqparm = new System.Collections.Specialized.NameValueCollection();
                foreach (var keyPair in parms)
                {
                    reqparm.Add(keyPair.Key, keyPair.Value);
                }

                byte[] responsebytes = wc.UploadValues(url, method, reqparm);
                result = Encoding.UTF8.GetString(responsebytes);
            }
            return result;
        }

获取歌曲详情调用方法：

public DetailResult Detail(long song_id)
        {
            string url = "http://music.163.com/weapi/v3/song/detail?csrf_token=";
            var data = new Dictionary<string, string> {
                { "c",
                    "[" + JsonConvert.SerializeObject(new Dictionary<string, string> { //神tm 加密的json里套json mdzz (说不定一次可以查多首歌?)
                        { "id", song_id.ToString() }
                    }) + "]"
                },
                {"csrf_token",""},
            };
            string raw = CURL(url, Prepare(JsonConvert.SerializeObject(data)));

            var deserialedObj = JsonConvert.DeserializeObject<DetailResult>(raw);
            return deserialedObj;
        }

QQ音乐

　　获取排行榜类别

　　　　https://c.y.qq.com/v8/fcg-bin/fcg_v8_toplist_opt.fcg?page=index&format=html&tpl=macv4&v8debug=1

　　获取排行榜中的歌曲

　　　　https://c.y.qq.com/v8/fcg-bin/fcg_v8_toplist_cp.fcg?tpl=3&page=detail&date={update_key}&topid={Id}&type=top&song_begin=0&song_num=30}&g_tk=5381&loginUin=0&hostUin=0&format=json&inCharset=utf8&outCharset=utf-8&notice=0&platform=yqq.json&needNewCode=0

　　参数：id:排行榜的类别id,song_num 每页显示的条数

　　获取歌曲链接

　　　　https://u.y.qq.com/cgi-bin/musicu.fcg?-=getplaysongvkey7202785251801513&g_tk=5381&loginUin=0&hostUin=0&format=json&inCharset=utf8&outCharset=utf-8&notice=0&platform=yqq.json&needNewCode=0&data=%7B%22req%22%3A%7B%22module%22%3A%22CDN.SrfCdnDispatchServer%22%2C%22method%22%3A%22GetCdnDispatch%22%2C%22param%22%3A%7B%22guid%22%3A%229756534816%22%2C%22calltype%22%3A0%2C%22userip%22%3A%22%22%7D%7D%2C%22req_0%22%3A%7B%22module%22%3A%22vkey.GetVkeyServer%22%2C%22method%22%3A%22CgiGetVkey%22%2C%22param%22%3A%7B%22guid%22%3A%226541487400%22%2C%22songmid%22%3A%5B%22{mid}%22%5D%2C%22songtype%22%3A%5B0%5D%2C%22uin%22%3A%220%22%2C%22loginflag%22%3A1%2C%22platform%22%3A%2220%22%7D%7D%2C%22comm%22%3A%7B%22uin%22%3A0%2C%22format%22%3A%22json%22%2C%22ct%22%3A20%2C%22cv%22%3A0%7D%7D

　　　　参数：mid:歌曲的mid　　

 private string GetSongUrl(string mid)
{
var url = $"https://u.y.qq.com/cgi-bin/musicu.fcg?-=getplaysongvkey7202785251801513&g_tk=5381&loginUin=0&hostUin=0&format=json&inCharset=utf8&outCharset=utf-8&notice=0&platform=yqq.json&needNewCode=0&data=%7B%22req%22%3A%7B%22module%22%3A%22CDN.SrfCdnDispatchServer%22%2C%22method%22%3A%22GetCdnDispatch%22%2C%22param%22%3A%7B%22guid%22%3A%229756534816%22%2C%22calltype%22%3A0%2C%22userip%22%3A%22%22%7D%7D%2C%22req_0%22%3A%7B%22module%22%3A%22vkey.GetVkeyServer%22%2C%22method%22%3A%22CgiGetVkey%22%2C%22param%22%3A%7B%22guid%22%3A%226541487400%22%2C%22songmid%22%3A%5B%22{mid}%22%5D%2C%22songtype%22%3A%5B0%5D%2C%22uin%22%3A%220%22%2C%22loginflag%22%3A1%2C%22platform%22%3A%2220%22%7D%7D%2C%22comm%22%3A%7B%22uin%22%3A0%2C%22format%22%3A%22json%22%2C%22ct%22%3A20%2C%22cv%22%3A0%7D%7D";
            WebClient client = new WebClient();
            client.Encoding = Encoding.UTF8;
            var result = client.DownloadString(url);
}

　　获取歌词：

　　　　https://c.y.qq.com/lyric/fcgi-bin/fcg_query_lyric_new.fcg?songmid={songmid}&g_tk=5381

　　　　参数：songmid:歌曲id　　　　

var url = $"https://c.y.qq.com/lyric/fcgi-bin/fcg_query_lyric_new.fcg?songmid={songmid}&g_tk=5381";
                WebClient client = new WebClient();

                client.Headers.Add("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.110 Safari/537.36");
                client.Headers.Add("Accept", "*/*");
                client.Headers.Add("Referer", "https://y.qq.com/portal/player.html");
                client.Headers.Add("Accept-Language", "zh-CN,zh;q=0.8");
                client.Headers.Add("Cookie", "tvfe_boss_uuid=c3db0dcc4d677c60; pac_uid=1_2728578956; qq_slist_autoplay=on; ts_refer=ADTAGh5_playsong; RK=pKOOKi2f1O; pgv_pvi=8927113216; o_cookie=2728578956; pgv_pvid=5107924810; ptui_loginuin=2728578956; ptcz=897c17d7e17ae9009e018ebf3f818355147a3a26c6c67a63ae949e24758baa2d; pt2gguin=o2728578956; pgv_si=s5715204096; qqmusic_fromtag=66; yplayer_open=1; ts_last=y.qq.com/portal/player.html; ts_uid=996779984; yq_index=0");

                client.Headers.Add("Host", "c.y.qq.com");
                var result = client.DownloadString(url);
                result = result.Substring(result.IndexOf('(') + );
                result = result.Substring(, result.LastIndexOf(')'));
                var data = JsonConvert.DeserializeObject<dynamic>(result);

歌词是经过base64进行加密的，所以获取后需要进行base64解密

/// <summary>
        /// Base64解码
        /// </summary>
        /// <param name="Message"></param>
        /// <returns></returns>
        public static string Base64Decode(string Message)
        {
            if ((Message.Length % ) != )
            {
                throw new ArgumentException("不是正确的BASE64编码，请检查。", "Message");
            }
            if (!System.Text.RegularExpressions.Regex.IsMatch(Message, "^[A-Z0-9/+=]*$", System.Text.RegularExpressions.RegexOptions.IgnoreCase))
            {
                throw new ArgumentException("包含不正确的BASE64编码，请检查。", "Message");
            }
            string Base64Code = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
            int page = Message.Length / ;
            System.Collections.ArrayList outMessage = new System.Collections.ArrayList(page * );
            char[] message = Message.ToCharArray();
            for (int i = ; i < page; i++)
            {
                byte[] instr = new byte[];
                instr[] = (byte)Base64Code.IndexOf(message[i * ]);
                instr[] = (byte)Base64Code.IndexOf(message[i *  + ]);
                instr[] = (byte)Base64Code.IndexOf(message[i *  + ]);
                instr[] = (byte)Base64Code.IndexOf(message[i *  + ]);
                byte[] outstr = new byte[];
                outstr[] = (byte)((instr[] << ) ^ ((instr[] & 0x30) >> ));
                if (instr[] != )
                {
                    outstr[] = (byte)((instr[] << ) ^ ((instr[] & 0x3c) >> ));
                }
                else
                {
                    outstr[] = ;
                }
                if (instr[] != )
                {
                    outstr[] = (byte)((instr[] << ) ^ instr[]);
                }
                else
                {
                    outstr[] = ;
                }
                outMessage.Add(outstr[]);
                if (outstr[] != )
                    outMessage.Add(outstr[]);
                if (outstr[] != )
                    outMessage.Add(outstr[]);
            }
            byte[] outbyte = (byte[])outMessage.ToArray(Type.GetType("System.Byte"));
            return Encoding.UTF8.GetString(outbyte);
        }

完整项目地址：Demo