Merge pull request #57 from aspriddell/net50-redirecthandler

add support for .net 5 headerpreserving handler
dragonfruitnetwork · Dec 28, 2020 · 9c3d41c · 9c3d41c
2 parents d48256a + bb00381
commit 9c3d41c
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Showing 3 changed files with 49 additions and 27 deletions.
diff --git a/DragonFruit.Common.Data.Tests/Handlers/AuthPreservingHandler/HeaderPreservingHeaderTests.cs b/DragonFruit.Common.Data.Tests/Handlers/AuthPreservingHandler/HeaderPreservingHeaderTests.cs
@@ -2,6 +2,7 @@
 // Licensed under the MIT License. Please refer to the LICENSE file at the root of this project for details
 
 using System;
+using System.Net;
 using DragonFruit.Common.Data.Handlers;
 using DragonFruit.Common.Data.Tests.Handlers.AuthPreservingHandler.Objects;
 using NUnit.Framework;
@@ -33,7 +34,7 @@ public void TestHeaderPreservation()
             redirectClient.Authorization = $"{auth.Type} {auth.AccessToken}";
 
             // user lookups by username = 301. without our HeaderPreservingHandler we'd get a 401
-            redirectClient.Perform(new OrbitTestUserRequest());
+            Assert.AreEqual(redirectClient.Perform(new OrbitTestUserRequest()).StatusCode, HttpStatusCode.OK);
         }
     }
 }
diff --git a/DragonFruit.Common.Data.Tests/Handlers/AuthPreservingHandler/Objects/AuthRequest.cs b/DragonFruit.Common.Data.Tests/Handlers/AuthPreservingHandler/Objects/AuthRequest.cs
@@ -22,6 +22,9 @@ public class AuthRequest : ApiRequest
         [FormParameter("client_secret")]
         public string ClientSecret => GetEnvironmentVar("orbit_client_secret");
 
+        [FormParameter("scope")]
+        public string Scopes => "public";
+
         private static string GetEnvironmentVar(string var)
         {
             var envVar = RuntimeInformation.IsOSPlatform(OSPlatform.Windows)

diff --git a/DragonFruit.Common.Data/Handlers/HeaderPreservingRedirectHandler.cs b/DragonFruit.Common.Data/Handlers/HeaderPreservingRedirectHandler.cs
@@ -4,6 +4,7 @@
 using System;
 using System.Net;
 using System.Net.Http;
+using System.Runtime.CompilerServices;
 using System.Threading;
 using System.Threading.Tasks;
 
@@ -35,6 +36,20 @@ public HeaderPreservingRedirectHandler(HttpMessageHandler innerHandler)
             }
         }
 
+#if NET5_0
+        protected override HttpResponseMessage Send(HttpRequestMessage request, CancellationToken cancellationToken)
+        {
+            var response = base.Send(request, cancellationToken);
+
+            if (IsRedirect(response.StatusCode))
+            {
+                response = base.Send(CopyRequest(response), cancellationToken);
+            }
+
+            return response;
+        }
+#endif
+
         protected override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
         {
             var tcs = new TaskCompletionSource<HttpResponseMessage>();
@@ -56,28 +71,9 @@ protected override Task<HttpResponseMessage> SendAsync(HttpRequestMessage reques
                         };
                     }
 
-                    if (response.StatusCode == HttpStatusCode.MovedPermanently
-                        || response.StatusCode == HttpStatusCode.Moved
-                        || response.StatusCode == HttpStatusCode.Redirect
-                        || response.StatusCode == HttpStatusCode.Found
-                        || response.StatusCode == HttpStatusCode.SeeOther
-                        || response.StatusCode == HttpStatusCode.RedirectKeepVerb
-                        || response.StatusCode == HttpStatusCode.TemporaryRedirect
-                        || (int)response.StatusCode == 308)
+                    if (IsRedirect(response.StatusCode))
                     {
-                        var newRequest = CopyRequest(response);
-
-                        if (response.StatusCode == HttpStatusCode.Redirect
-                            || response.StatusCode == HttpStatusCode.Found
-                            || response.StatusCode == HttpStatusCode.SeeOther)
-                        {
-                            newRequest.Content = null;
-                            newRequest.Method = HttpMethod.Get;
-                        }
-
-                        newRequest.RequestUri = response.Headers.Location;
-
-                        base.SendAsync(newRequest, cancellationToken)
+                        base.SendAsync(CopyRequest(response), cancellationToken)
                             .ContinueWith(t2 => tcs.SetResult(t2.Result), cancellationToken);
                     }
                     else
@@ -91,7 +87,7 @@ protected override Task<HttpResponseMessage> SendAsync(HttpRequestMessage reques
 
         private static HttpRequestMessage CopyRequest(HttpResponseMessage response)
         {
-            var oldRequest = response.RequestMessage;
+            var oldRequest = response.RequestMessage ?? throw new NullReferenceException("Request Message not found");
 
             var newRequest = new HttpRequestMessage(oldRequest.Method, oldRequest.RequestUri);
 
@@ -116,7 +112,7 @@ private static HttpRequestMessage CopyRequest(HttpResponseMessage response)
 #if NET5_0
             foreach (var (key, value) in oldRequest.Options)
             {
-                if (value == null || !(value is string s))
+                if (!(value is string s))
                 {
                     continue;
                 }
@@ -130,9 +126,7 @@ private static HttpRequestMessage CopyRequest(HttpResponseMessage response)
             }
 #endif
 
-            if (response.StatusCode == HttpStatusCode.Redirect
-                || response.StatusCode == HttpStatusCode.Found
-                || response.StatusCode == HttpStatusCode.SeeOther)
+            if (AlterMethod(response.StatusCode))
             {
                 newRequest.Content = null;
                 newRequest.Method = HttpMethod.Get;
@@ -144,5 +138,29 @@ private static HttpRequestMessage CopyRequest(HttpResponseMessage response)
 
             return newRequest;
         }
+
+        #region Switches
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        private static bool IsRedirect(HttpStatusCode code) => code switch
+        {
+            HttpStatusCode.Moved => true,
+            HttpStatusCode.Redirect => true,
+            HttpStatusCode.SeeOther => true,
+            HttpStatusCode.RedirectKeepVerb => true,
+
+            _ => false
+        };
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        private static bool AlterMethod(HttpStatusCode code) => code switch
+        {
+            HttpStatusCode.Redirect => true,
+            HttpStatusCode.SeeOther => true,
+
+            _ => false
+        };
+
+        #endregion
     }
 }