using Newtonsoft.Json; using SpotifyAPI.Local.Models; using System; using System.Collections.Generic; using System.Net; using System.Text; using System.Threading.Tasks; namespace SpotifyAPI.Local { internal class RemoteHandler { public string OauthKey { get; private set; } public string CfidKey { get; private set; } private SpotifyLocalAPIConfig _config; public RemoteHandler(SpotifyLocalAPIConfig config) { _config = config; } internal Boolean Init() { OauthKey = GetOAuthKey(); CfidKey = GetCfid(); return !string.IsNullOrEmpty(CfidKey); } internal async Task SendPauseRequest() { await QueryAsync("remote/pause.json?pause=true", true, true, -1).ConfigureAwait(false); } internal async Task SendPlayRequest() { await QueryAsync("remote/pause.json?pause=false", true, true, -1).ConfigureAwait(false); } internal async Task SendPlayRequest(string url, string context = "") { // TODO: instead of having an empty context, one way to fix the bug with the playback time beyond the length of a song would be to provide a 1-song context, and it would be fixed. await QueryAsync($"remote/play.json?uri={url}&context={context}", true, true, -1).ConfigureAwait(false); } internal async Task SendQueueRequest(string url) { await QueryAsync("remote/play.json?uri=" + url + "?action=queue", true, true, -1).ConfigureAwait(false); } internal StatusResponse GetNewStatus() { string response = Query("remote/status.json", true, true, -1); if (string.IsNullOrEmpty(response)) { return null; } response = response.Replace("\\n", ""); List raw = JsonConvert.DeserializeObject>(response); return raw[0]; } internal string GetOAuthKey() { string raw; using (WebClient wc = GetWebClientWithUserAgentHeader()) { raw = wc.DownloadString("http://open.spotify.com/token"); } Dictionary dic = JsonConvert.DeserializeObject>(raw); return dic == null ? "" : (string)dic["t"]; } internal string GetCfid() { string response = Query("simplecsrf/token.json", false, false, -1); response = response.Replace(@"\", ""); List cfidList = (List)JsonConvert.DeserializeObject(response, typeof(List)); if (cfidList == null) return ""; if (cfidList.Count != 1) throw new Exception("CFID could not be loaded"); return cfidList[0].Error == null ? cfidList[0].Token : ""; } internal string Query(string request, bool oauth, bool cfid, int wait) { string parameters = "?&ref=&cors=&_=" + GetTimestamp(); if (request.Contains("?")) { parameters = parameters.Substring(1); } if (oauth) { parameters += "&oauth=" + OauthKey; } if (cfid) { parameters += "&csrf=" + CfidKey; } if (wait != -1) { parameters += "&returnafter=" + wait; parameters += "&returnon=login%2Clogout%2Cplay%2Cpause%2Cerror%2Cap"; } string address = $"{_config.HostUrl}:{_config.Port}/{request}{parameters}"; string response = ""; try { using (var wc = new ExtendedWebClient()) { if (SpotifyLocalAPI.IsSpotifyRunning()) { response = "[ " + wc.DownloadString(address) + " ]"; } } } catch { return string.Empty; } return response; } internal async Task QueryAsync(string request, bool oauth, bool cfid, int wait) { string parameters = "?&ref=&cors=&_=" + GetTimestamp(); if (request.Contains("?")) { parameters = parameters.Substring(1); } if (oauth) { parameters += "&oauth=" + OauthKey; } if (cfid) { parameters += "&csrf=" + CfidKey; } if (wait != -1) { parameters += "&returnafter=" + wait; parameters += "&returnon=login%2Clogout%2Cplay%2Cpause%2Cerror%2Cap"; } string address = $"{_config.HostUrl}:{_config.Port}/{request}{parameters}"; string response = ""; try { using (var wc = new ExtendedWebClient()) { if (SpotifyLocalAPI.IsSpotifyRunning()) response = "[ " + await wc.DownloadStringTaskAsync(new Uri(address)).ConfigureAwait(false) + " ]"; } } catch { return string.Empty; } return response; } internal int GetTimestamp() { return Convert.ToInt32((DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0)).TotalSeconds); } internal WebClient GetWebClientWithUserAgentHeader() { var wc = new WebClient(); wc.Headers.Add(HttpRequestHeader.UserAgent, "Spotify (1.0.50.41368.gbd68dbef)"); return wc; } } }