added some logoutputs

Controllers/PlayListController.cs

@@ -5,6 +5,7 @@ using System.Text.RegularExpressions;
 using System.Threading.Tasks;
 using Microsoft.AspNetCore.Mvc;
 using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.Logging;
 
 namespace tv7playlist.Controllers
 {
@@ -14,16 +15,23 @@ namespace tv7playlist.Controllers
     {
         private const string PlayListContentType = "audio/mpegurl";
 
+        /// <summary>
+        ///     This is the regex used to build up the proxy url.
+        ///     The first part (udp://@) is ignored while generating the final url
+        ///     The multicast address is expected to be a ip-address with a port and is reused
+        /// </summary>
         private static readonly Regex MultiCastRegex = new Regex(@"(udp\:\/\/@)([0-9.:]+)",
             RegexOptions.Compiled | RegexOptions.Singleline | RegexOptions.IgnoreCase);
 
         private readonly string _downloadFileName;
+        private readonly ILogger<PlayListController> _logger;
         private readonly string _proxyUrl;
 
         private readonly string _tv7Url;
 
-        public PlayListController(IConfiguration configuration)
+        public PlayListController(ILogger<PlayListController> logger, IConfiguration configuration)
         {
+            _logger = logger ?? throw new ArgumentNullException(nameof(logger));
             if (configuration == null) throw new ArgumentNullException(nameof(configuration));
 
             var appConfig = configuration.Get<AppConfig>();
@@ -34,14 +42,26 @@ namespace tv7playlist.Controllers
         }
 
         [HttpGet]
-        public async Task<FileStreamResult> Get()
+        public async Task<ActionResult> Get()
         {
             using (var httpClient = new HttpClient())
             {
+                _logger.LogInformation(LoggingEvents.Playlist, "Downloading playlist from {tv7url}", _tv7Url);
                 var tv7Response = await httpClient.GetAsync(_tv7Url);
 
+                if (!tv7Response.IsSuccessStatusCode)
+                {
+                    _logger.LogWarning(LoggingEvents.PlaylistNotFound,
+                        "Could not download playlist from {tv7url}. The StatusCode was: {StatusCode}", _tv7Url,
+                        tv7Response.StatusCode);
+                    return StatusCode((int) tv7Response.StatusCode);
+                }
+
                 var modifiedPlaylist = await BuildProxyPlaylist(tv7Response);
 
+                _logger.LogInformation(LoggingEvents.Playlist, "Sending updated playlist {filename}",
+                    _downloadFileName);
+
                 return new FileStreamResult(modifiedPlaylist, PlayListContentType)
                 {
                     FileDownloadName = _downloadFileName
@@ -53,6 +73,7 @@ namespace tv7playlist.Controllers
         {
             var outStream = new MemoryStream();
             var outWriter = new StreamWriter(outStream);
+            _logger.LogInformation(LoggingEvents.Playlist, "Building m3u file content");
 
             using (var tv7ReadStream = await tv7Response.Content.ReadAsStreamAsync())
             using (var reader = new StreamReader(tv7ReadStream))
@@ -60,8 +81,9 @@ namespace tv7playlist.Controllers
                 while (!reader.EndOfStream)
                 {
                     var line = await reader.ReadLineAsync();
-                    line = MultiCastRegex.Replace(line, $"{_proxyUrl}/$2/");
-                    outWriter.WriteLine(line);
+                    var proxyLine = MultiCastRegex.Replace(line, $"{_proxyUrl}/$2/");
+                    outWriter.WriteLine(proxyLine);
+                    _logger.LogDebug(LoggingEvents.Playlist, "Transformed {src} to {dst}", line, proxyLine);
                 }
 
                 await outWriter.FlushAsync();

LoggingEvents.cs

@@ -0,0 +1,10 @@
+namespace tv7playlist
+{
+    public class LoggingEvents
+    {
+        public const int Startup = 1000;
+        public const int Playlist = 1001;
+
+        public const int PlaylistNotFound = 4000;
+    }
+}

Program.cs

@@ -1,5 +1,6 @@
 using Microsoft.AspNetCore;
 using Microsoft.AspNetCore.Hosting;
+using Microsoft.Extensions.Logging;
 
 namespace tv7playlist
 {
@@ -15,6 +16,12 @@ namespace tv7playlist
         public static IWebHostBuilder CreateWebHostBuilder(string[] args)
         {
             return WebHost.CreateDefaultBuilder(args)
+                .ConfigureLogging((hostingContext, logging) =>
+                {
+                    logging.AddConfiguration(hostingContext.Configuration.GetSection("Logging"));
+                    logging.AddConsole();
+                    logging.AddDebug();
+                })
                 .UseStartup<Startup>();
         }
     }

Startup.cs

@@ -1,23 +1,20 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Threading.Tasks;
-using Microsoft.AspNetCore.Builder;
+using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Hosting;
-using Microsoft.AspNetCore.HttpsPolicy;
 using Microsoft.AspNetCore.Mvc;
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Logging;
-using Microsoft.Extensions.Options;
 
 namespace tv7playlist
 {
     public class Startup
     {
-        public Startup(IConfiguration configuration)
+        private readonly ILogger _logger;
+
+        public Startup(IConfiguration configuration, ILogger<Startup> logger)
         {
             Configuration = configuration;
+            _logger = logger;
         }
 
         public IConfiguration Configuration { get; }
@@ -33,15 +30,20 @@ namespace tv7playlist
         // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
         public void Configure(IApplicationBuilder app, IHostingEnvironment env)
         {
-            if (env.IsDevelopment())
-            {
-                app.UseDeveloperExceptionPage();
-            }
-            else
-            {
-                app.UseHsts();
-            }
+            LogConfiguration();
+
+            if (env.IsDevelopment()) app.UseDeveloperExceptionPage();
+
             app.UseMvc();
         }
+
+        private void LogConfiguration()
+        {
+            var appConfig = Configuration.Get<AppConfig>();
+            _logger.LogInformation(LoggingEvents.Startup, "Using TV7 URL: {TV7Url}", appConfig.TV7Url);
+            _logger.LogInformation(LoggingEvents.Startup, "Using Udpxy URL: {UdpxyUrl}", appConfig.UdpxyUrl);
+            _logger.LogInformation(LoggingEvents.Startup, "Using DownloadFileName: {DownloadFileName}",
+                appConfig.DownloadFileName);
+        }
     }
-}
+}

appsettings.json

@@ -1,11 +1,13 @@
 {
   "Logging": {
     "LogLevel": {
-      "Default": "Warning"
+      "Default": "Information",
+      "System": "Information",
+      "Microsoft": "Information"
     }
   },
   "AllowedHosts": "*",
-  "TV7Url":"https://api.init7.net/tvchannels.m3u",
-  "UdpxyUrl":"http://192.168.15.2:4022/udp",
-  "DownloadFileName":"PlaylistTV7udpxy.m3u"
+  "TV7Url": "https://api.init7.net/tvchannels.m3u",
+  "UdpxyUrl": "http://192.168.15.2:4022/udp",
+  "DownloadFileName": "PlaylistTV7udpxy.m3u"
 }