New: Use ASP.NET Core instead of Nancy

src/Readarr.Http/Authentication/ApiKeyAuthenticationHandler.cs

@@ -0,0 +1,89 @@
+using System.Collections.Generic;
+using System.Linq;
+using System.Security.Claims;
+using System.Text.Encodings.Web;
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Authentication;
+using Microsoft.Extensions.Logging;
+using Microsoft.Extensions.Options;
+
+namespace Readarr.Http.Authentication
+{
+    public class ApiKeyAuthenticationOptions : AuthenticationSchemeOptions
+    {
+        public const string DefaultScheme = "API Key";
+        public string Scheme => DefaultScheme;
+        public string AuthenticationType = DefaultScheme;
+
+        public string HeaderName { get; set; }
+        public string QueryName { get; set; }
+        public string ApiKey { get; set; }
+    }
+
+    public class ApiKeyAuthenticationHandler : AuthenticationHandler<ApiKeyAuthenticationOptions>
+    {
+        public ApiKeyAuthenticationHandler(IOptionsMonitor<ApiKeyAuthenticationOptions> options,
+            ILoggerFactory logger,
+            UrlEncoder encoder,
+            ISystemClock clock)
+            : base(options, logger, encoder, clock)
+        {
+        }
+
+        private string ParseApiKey()
+        {
+            // Try query parameter
+            if (Request.Query.TryGetValue(Options.QueryName, out var value))
+            {
+                return value.FirstOrDefault();
+            }
+
+            // No ApiKey query parameter found try headers
+            if (Request.Headers.TryGetValue(Options.HeaderName, out var headerValue))
+            {
+                return headerValue.FirstOrDefault();
+            }
+
+            return Request.Headers["Authorization"].FirstOrDefault()?.Replace("Bearer ", "");
+        }
+
+        protected override Task<AuthenticateResult> HandleAuthenticateAsync()
+        {
+            var providedApiKey = ParseApiKey();
+
+            if (string.IsNullOrWhiteSpace(providedApiKey))
+            {
+                return Task.FromResult(AuthenticateResult.NoResult());
+            }
+
+            if (Options.ApiKey == providedApiKey)
+            {
+                var claims = new List<Claim>
+                {
+                    new Claim("ApiKey", "true")
+                };
+
+                var identity = new ClaimsIdentity(claims, Options.AuthenticationType);
+                var identities = new List<ClaimsIdentity> { identity };
+                var principal = new ClaimsPrincipal(identities);
+                var ticket = new AuthenticationTicket(principal, Options.Scheme);
+
+                return Task.FromResult(AuthenticateResult.Success(ticket));
+            }
+
+            return Task.FromResult(AuthenticateResult.NoResult());
+        }
+
+        protected override Task HandleChallengeAsync(AuthenticationProperties properties)
+        {
+            Response.StatusCode = 401;
+            return Task.CompletedTask;
+        }
+
+        protected override Task HandleForbiddenAsync(AuthenticationProperties properties)
+        {
+            Response.StatusCode = 403;
+            return Task.CompletedTask;
+        }
+    }
+}