custom binding and port number (#195)

* allow custom bindings * reorganize * cleanup
2021-05-20 20:09:14 -05:00
parent 5fd0cc5469
commit c0b5ecd388
11 changed files with 90 additions and 17 deletions
@@ -0,0 +1,63 @@
+using System;
+using System.Net;
+using System.Text.RegularExpressions;
+using System.Threading;
+using System.Threading.Tasks;
+using ErsatzTV.Core;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.Hosting;
+using Microsoft.Extensions.Logging;
+
+namespace ErsatzTV.Services.RunOnce
+{
+    public class EndpointValidatorService : IHostedService
+    {
+        private readonly IConfiguration _configuration;
+        private readonly ILogger<EndpointValidatorService> _logger;
+
+        public EndpointValidatorService(IConfiguration configuration, ILogger<EndpointValidatorService> logger)
+        {
+            _configuration = configuration;
+            _logger = logger;
+        }
+
+        public Task StartAsync(CancellationToken cancellationToken)
+        {
+            string urls = _configuration.GetValue<string>("Kestrel:Endpoints:Http:Url");
+            if (urls.Split(";").Length > 1)
+            {
+                throw new NotSupportedException($"Multiple endpoints are not supported: {urls}");
+            }
+
+            const string PATTERN = @"http:\/\/(.*):(\d+)";
+            Match match = Regex.Match(urls, PATTERN);
+            if (match.Success)
+            {
+                string hostname = match.Groups[1].Value;
+                Settings.ListenPort = int.Parse(match.Groups[2].Value);
+
+                // IP address must be 0.0.0.0 or 127.0.0.1
+                if (IPAddress.TryParse(hostname, out IPAddress address))
+                {
+                    if (!address.Equals(IPAddress.Parse("0.0.0.0")) && !IPAddress.IsLoopback(address))
+                    {
+                        throw new NotSupportedException($"Endpoint MUST include loopback: {urls}");
+                    }
+                }
+            }
+            else
+            {
+                throw new NotSupportedException($"Invalid endpoint format: {urls}");
+            }
+
+            _logger.LogInformation(
+                "Server will listen on port {Port} - try UI at {UI}",
+                Settings.ListenPort,
+                $"http://localhost:{Settings.ListenPort}");
+
+            return Task.CompletedTask;
+        }
+
+        public Task StopAsync(CancellationToken cancellationToken) => Task.CompletedTask;
+    }
+}