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Heath Volmer
266
Essentials/PepperDashEssentials/HttpApiHandler.cs
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266
Essentials/PepperDashEssentials/HttpApiHandler.cs
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using Crestron.SimplSharp;
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using Crestron.SimplSharp.CrestronIO;
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using Crestron.SimplSharp.Net.Http;
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using Newtonsoft.Json;
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using Newtonsoft.Json.Linq;
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using PepperDash.Essentials.Core;
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using PepperDash.Essentials.Core.Http;
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using PepperDash.Core;
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namespace PepperDash.Essentials
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{
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public class EssentialsHttpApiHandler
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{
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string ConfigPath;
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string PresetsPathPrefix;
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EssentialsHttpServer Server;
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/// <summary>
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///
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/// </summary>
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/// <param name="server">HTTP server to attach to</param>
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/// <param name="configPath">The full path to configuration file</param>
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/// <param name="presetsListPath">The folder prefix for the presets path, eq "\HTML\presets\"</param>
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public EssentialsHttpApiHandler(EssentialsHttpServer server, string configPath, string presetsPathPrefix)
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{
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if (server == null) throw new ArgumentNullException("server");
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Server = server;
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ConfigPath = configPath;
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PresetsPathPrefix = presetsPathPrefix;
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server.ApiRequest += Server_ApiRequest;
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}
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void Server_ApiRequest(object sender, Crestron.SimplSharp.Net.Http.OnHttpRequestArgs args)
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{
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try
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{
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var path = args.Request.Path.ToLower();
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if (path == "/api/config")
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HandleApiConfig(args);
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else if (path.StartsWith("/api/presetslist/"))
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HandleApiPresetsList(args);
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else if (path == "/api/presetslists")
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HandleApiGetPresetsLists(args.Request, args.Response);
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else
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{
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args.Response.Code = 404;
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return;
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}
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args.Response.Header.SetHeaderValue("Access-Control-Allow-Origin", "*");
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args.Response.Header.SetHeaderValue("Access-Control-Allow-Methods", "GET, POST, PATCH, PUT, DELETE, OPTIONS");
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}
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catch (Exception e)
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{
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Debug.Console(1, "Uncaught HTTP server error: \n{0}", e);
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args.Response.Code = 500;
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}
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}
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/// <summary>
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/// GET will return the running configuration. POST will attempt to take in a new config
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/// and restart the program.
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/// </summary>
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void HandleApiConfig(OnHttpRequestArgs args)
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{
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var request = args.Request;
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if (request.Header.RequestType == "GET")
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{
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if (File.Exists(ConfigPath))
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{
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Debug.Console(2, "Sending config:{0}", ConfigPath);
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args.Response.Header.ContentType = EssentialsHttpServer.GetContentType(new FileInfo(ConfigPath).Extension);
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args.Response.ContentStream = new FileStream(ConfigPath, FileMode.Open, FileAccess.Read);
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}
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}
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else if (request.Header.RequestType == "POST")
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{
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Debug.Console(2, "Post type: '{0}'", request.Header.ContentType);
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// Make sure we're receiving at least good json
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Debug.Console(1, "Receving new config");
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if (GetContentStringJson(args) == null)
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return;
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//---------------------------- try to move these into common method
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// Move current file aside
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var bakPath = ConfigPath + ".bak";
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if (File.Exists(bakPath))
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File.Delete(bakPath);
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File.Move(ConfigPath, bakPath);
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// Write the file
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using (FileStream fs = File.Open(ConfigPath, FileMode.OpenOrCreate))
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using (StreamWriter sw = new StreamWriter(fs))
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{
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try
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{
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sw.Write(args.Request.ContentString);
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}
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catch (Exception e)
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{
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string err = string.Format("Error writing received config file:\r{0}", e);
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CrestronConsole.PrintLine(err);
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ErrorLog.Warn(err);
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// Put file back
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File.Move(ConfigPath + ".bak", ConfigPath);
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args.Response.Code = 500;
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return;
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}
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}
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// If client says "yeah, restart" and has a good token
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// Restart program
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string consoleResponse = null;
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var restart = CrestronConsole.SendControlSystemCommand("progreset -p:" +
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InitialParametersClass.ApplicationNumber, ref consoleResponse);
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if (!restart) Debug.Console(0, "CAN'T DO THAT YO: {0}", consoleResponse);
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}
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}
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void HandleApiPresetsList(OnHttpRequestArgs args)
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{
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var listPath = PresetsPathPrefix + args.Request.Path.Remove(0, 17);
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Debug.Console(2, "Checking for preset list '{0}'", listPath);
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if (args.Request.Header.RequestType == "GET")
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{
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if (File.Exists(listPath))
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{
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Debug.Console(2, "Sending presets file:{0}", listPath);
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args.Response.Header.ContentType = EssentialsHttpServer.GetContentType(new FileInfo(listPath).Extension);
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args.Response.ContentStream = new FileStream(listPath, FileMode.Open, FileAccess.Read);
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}
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}
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else if (args.Request.Header.RequestType == "POST")
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{
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// Make sure we're receiving at least good json
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Debug.Console(1, "Receving new presets");
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if (GetContentStringJson(args) == null)
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return;
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//---------------------------- try to move these into common method
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// Move current file aside
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var bakPath = listPath + ".new";
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Debug.Console(2, "Moving presets file to {0}", bakPath);
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if(File.Exists(bakPath))
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File.Delete(bakPath);
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File.Move(listPath, bakPath);
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Debug.Console(2, "Writing new file");
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// Write the file
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using (FileStream fs = File.OpenWrite(listPath))
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using (StreamWriter sw = new StreamWriter(fs))
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{
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try
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{
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Debug.Console(2, "Writing {1}, {0} bytes", args.Request.ContentString.Length, listPath);
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sw.Write(args.Request.ContentString);
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}
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catch (Exception e)
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{
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string err = string.Format("Error writing received presets file:\r{0}", e);
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CrestronConsole.PrintLine(err);
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ErrorLog.Warn(err);
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// Put file back
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File.Move(listPath + ".bak", listPath);
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args.Response.Code = 500;
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return;
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}
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}
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}
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}
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void HandleApiGetPresetsLists(HttpServerRequest request, HttpServerResponse response)
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{
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if (request.Header.RequestType != "GET")
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{
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response.Code = 404; // This should be a 405 with an allow header
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return;
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}
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if (Directory.Exists(PresetsPathPrefix))
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{
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//CrestronConsole.PrintLine("Parsing presets directory");
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List<string> files = Directory.GetFiles(PresetsPathPrefix, "*.json")
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.ToList().Select(f => Path.GetFileName(f)).ToList();
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if (files.Count > 0)
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files.Sort();
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var json = JsonConvert.SerializeObject(files);
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response.Header.ContentType = "application/json";
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response.ContentString = json;
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}
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// //CrestronConsole.PrintLine("Found {0} files", files.Count);
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// JObject jo = new JObject();
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// JArray ja = new JArray();
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// foreach (var filename in files)
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// {
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// try
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// {
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// using (StreamReader sr = new StreamReader(filename))
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// {
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// JObject tempJo = JObject.Parse(sr.ReadToEnd());
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// if (tempJo.Value<string>("content").Equals("presetsList"))
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// {
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// var jItem = new JObject(); // make a new object
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// jItem.Add("Name", tempJo["name"]);
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// jItem.Add("File", filename);
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// jItem.Add("Url", Uri.EscapeUriString(new Uri(
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// filename.Replace("\\html", "")
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// .Replace("\\HTML", "")
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// .Replace('\\', '/'), UriKind.Relative).ToString()));
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// ja.Add(jItem); // add to array
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// }
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// else
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// CrestronConsole.PrintLine("Cannot use presets file '{0}'", filename);
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// }
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// }
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// catch
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// {
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// // ignore failures - maybe delete them
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// CrestronConsole.PrintLine("Unable to read presets file '{0}'", filename);
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// }
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// }
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// jo.Add("PresetChannelLists", ja);
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// //CrestronConsole.PrintLine(jo.ToString());
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// response.Header.ContentType = "application/json";
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// response.ContentString = jo.ToString();
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//}
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//else
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// CrestronConsole.PrintLine("No presets files in directory");
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}
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/// <summary>
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/// Simply does what it says
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/// </summary>
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JObject GetContentStringJson(OnHttpRequestArgs args)
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{
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//var content = args.Request.ContentString;
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//Debug.Console(1, "{0}", content);
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try
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{
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// just see if it parses properly
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return JObject.Parse(args.Request.ContentString);
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}
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catch (Exception e)
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{
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string err = string.Format("JSON Error reading config file:\r{0}", e);
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CrestronConsole.PrintLine(err);
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ErrorLog.Warn(err);
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args.Response.Code = 400; // Bad request
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return null;
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}
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}
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}
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}
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