Fixes for etag versions.

src/Squidex.Domain.Apps.Entities/Contents/Queries/ContentLoader.cs

@@ -32,7 +32,7 @@ namespace Squidex.Domain.Apps.Entities.Contents.Queries
 
                 var content = await grain.GetStateAsync(version);
 
-                if (content.Value == null || content.Value.Version != version)
+                if (content.Value == null || (version > EtagVersion.Any && content.Value.Version != version))
                 {
                     throw new DomainObjectNotFoundException(id.ToString(), typeof(IContentEntity));
                 }

src/Squidex.Domain.Apps.Entities/SquidexCommand.cs

@@ -17,6 +17,6 @@ namespace Squidex.Domain.Apps.Entities
 
         public ClaimsPrincipal User { get; set; }
 
-        public long ExpectedVersion { get; set; } = EtagVersion.Any;
+        public long ExpectedVersion { get; set; } = EtagVersion.Auto;
     }
 }

src/Squidex.Infrastructure.Azure/EventSourcing/CosmosDbEventStore_Writer.cs

@@ -60,7 +60,7 @@ namespace Squidex.Infrastructure.EventSourcing
 
                 var currentVersion = await GetEventStreamOffsetAsync(streamName);
 
-                if (expectedVersion != EtagVersion.Any && expectedVersion != currentVersion)
+                if (expectedVersion > EtagVersion.Any && expectedVersion != currentVersion)
                 {
                     throw new WrongEventVersionException(currentVersion, expectedVersion);
                 }
@@ -81,7 +81,7 @@ namespace Squidex.Infrastructure.EventSourcing
                         {
                             currentVersion = await GetEventStreamOffsetAsync(streamName);
 
-                            if (expectedVersion != EtagVersion.Any)
+                            if (expectedVersion > EtagVersion.Any)
                             {
                                 throw new WrongEventVersionException(currentVersion, expectedVersion);
                             }

src/Squidex.Infrastructure.MongoDb/EventSourcing/MongoEventStore_Writer.cs

@@ -51,7 +51,7 @@ namespace Squidex.Infrastructure.EventSourcing
 
                 var currentVersion = await GetEventStreamOffsetAsync(streamName);
 
-                if (expectedVersion != EtagVersion.Any && expectedVersion != currentVersion)
+                if (expectedVersion > EtagVersion.Any && expectedVersion != currentVersion)
                 {
                     throw new WrongEventVersionException(currentVersion, expectedVersion);
                 }
@@ -74,7 +74,7 @@ namespace Squidex.Infrastructure.EventSourcing
                         {
                             currentVersion = await GetEventStreamOffsetAsync(streamName);
 
-                            if (expectedVersion != EtagVersion.Any)
+                            if (expectedVersion > EtagVersion.Any)
                             {
                                 throw new WrongEventVersionException(currentVersion, expectedVersion);
                             }

src/Squidex.Infrastructure/Commands/DomainObjectGrainBase.cs

@@ -152,7 +152,7 @@ namespace Squidex.Infrastructure.Commands
         {
             Guard.NotNull(command, nameof(command));
 
-            if (command.ExpectedVersion != EtagVersion.Any && command.ExpectedVersion != Version)
+            if (command.ExpectedVersion > EtagVersion.Any && command.ExpectedVersion != Version)
             {
                 throw new DomainObjectVersionException(id.ToString(), GetType(), Version, command.ExpectedVersion);
             }

src/Squidex.Infrastructure/Commands/LogSnapshotDomainObjectGrain.cs

@@ -36,7 +36,7 @@ namespace Squidex.Infrastructure.Commands
 
         public T GetSnapshot(long version)
         {
-            if (version == EtagVersion.Any)
+            if (version <= EtagVersion.Any)
             {
                 return Snapshot;
             }

src/Squidex.Infrastructure/EtagVersion.cs

@@ -9,10 +9,12 @@ namespace Squidex.Infrastructure
 {
     public static class EtagVersion
     {
+        public const long NotFound = long.MinValue;
+
+        public const long Auto = -3;
+
         public const long Any = -2;
 
         public const long Empty = -1;
-
-        public const long NotFound = long.MinValue;
     }
 }

src/Squidex.Infrastructure/States/Persistence{TSnapshot,TKey}.cs

@@ -69,7 +69,7 @@ namespace Squidex.Infrastructure.States
 
             UpdateVersion();
 
-            if (expectedVersion != EtagVersion.Any && expectedVersion != version)
+            if (expectedVersion > EtagVersion.Any && expectedVersion != version)
             {
                 if (version == EtagVersion.Empty)
                 {

src/Squidex.Web/CommandMiddlewares/ETagCommandMiddleware.cs

@@ -10,6 +10,7 @@ using System.Globalization;
 using System.Threading.Tasks;
 using Microsoft.AspNetCore.Http;
 using Microsoft.Net.Http.Headers;
+using Squidex.Domain.Apps.Entities;
 using Squidex.Infrastructure;
 using Squidex.Infrastructure.Commands;
 
@@ -35,22 +36,17 @@ namespace Squidex.Web.CommandMiddlewares
                 return;
             }
 
-            context.Command.ExpectedVersion = EtagVersion.Any;
+            var command = context.Command;
 
-            var headers = httpContext.Request.Headers;
-
-            if (headers.TryGetValue(HeaderNames.IfMatch, out var etag) && !string.IsNullOrWhiteSpace(etag))
+            if (command.ExpectedVersion == EtagVersion.Auto)
             {
-                var etagValue = etag.ToString();
-
-                if (etagValue.StartsWith("W/", StringComparison.OrdinalIgnoreCase))
+                if (TryParseEtag(httpContext, out var expectedVersion))
                 {
-                    etagValue = etagValue.Substring(2);
+                    command.ExpectedVersion = expectedVersion;
                 }
-
-                if (long.TryParse(etagValue, NumberStyles.Any, CultureInfo.InvariantCulture, out var expectedVersion))
+                else
                 {
-                    context.Command.ExpectedVersion = expectedVersion;
+                    command.ExpectedVersion = EtagVersion.Any;
                 }
             }
 
@@ -58,8 +54,37 @@ namespace Squidex.Web.CommandMiddlewares
 
             if (context.PlainResult is EntitySavedResult result)
             {
-                httpContext.Response.Headers[HeaderNames.ETag] = result.Version.ToString();
+                SetResponsEtag(httpContext, result.Version);
+            }
+            else if (context.PlainResult is IEntityWithVersion entity)
+            {
+                SetResponsEtag(httpContext, entity.Version);
+            }
+        }
+
+        private static void SetResponsEtag(HttpContext httpContext, long version)
+        {
+            httpContext.Response.Headers[HeaderNames.ETag] = version.ToString();
+        }
+
+        private static bool TryParseEtag(HttpContext httpContext, out long version)
+        {
+            version = default;
+
+            if (httpContext.Request.Headers.TryGetHeaderString(HeaderNames.IfMatch, out var etag))
+            {
+                if (etag.StartsWith("W/", StringComparison.OrdinalIgnoreCase))
+                {
+                    etag = etag.Substring(2);
+                }
+
+                if (long.TryParse(etag, NumberStyles.Any, CultureInfo.InvariantCulture, out version))
+                {
+                    return true;
+                }
             }
+
+            return false;
         }
     }
 }

src/Squidex.Web/Extensions.cs

@@ -7,6 +7,7 @@
 
 using System;
 using System.Security.Claims;
+using Microsoft.AspNetCore.Http;
 using Squidex.Infrastructure.Security;
 
 namespace Squidex.Web
@@ -43,5 +44,23 @@ namespace Squidex.Web
 
             return string.Equals(subject, userId, StringComparison.OrdinalIgnoreCase);
         }
+
+        public static bool TryGetHeaderString(this IHeaderDictionary headers, string header, out string result)
+        {
+            result = null;
+
+            if (headers.TryGetValue(header, out var value))
+            {
+                string valueString = value;
+
+                if (!string.IsNullOrWhiteSpace(valueString))
+                {
+                    result = valueString;
+                    return true;
+                }
+            }
+
+            return false;
+        }
     }
 }

src/Squidex.Web/Pipeline/ETagFilter.cs

@@ -5,6 +5,7 @@
 //  All rights reserved. Licensed under the MIT license.
 // ==========================================================================
 
+using System;
 using System.Threading.Tasks;
 using Microsoft.AspNetCore.Http;
 using Microsoft.AspNetCore.Mvc;
@@ -29,21 +30,19 @@ namespace Squidex.Web.Pipeline
 
             var httpContext = context.HttpContext;
 
-            if (httpContext.Response.Headers.TryGetValue(HeaderNames.ETag, out var etag) && !string.IsNullOrWhiteSpace(etag))
+            if (httpContext.Response.Headers.TryGetHeaderString(HeaderNames.ETag, out var etag))
             {
-                string etagValue = etag;
-
-                if (!options.Strong)
+                if (!options.Strong && !etag.StartsWith("W/", StringComparison.OrdinalIgnoreCase))
                 {
-                    etagValue = "W/" + etag;
+                    etag = $"W/{etag}";
 
-                    httpContext.Response.Headers[HeaderNames.ETag] = etagValue;
+                    httpContext.Response.Headers[HeaderNames.ETag] = etag;
                 }
 
                 if (HttpMethods.IsGet(httpContext.Request.Method) &&
                     httpContext.Response.StatusCode == 200 &&
-                    httpContext.Request.Headers.TryGetValue(HeaderNames.IfNoneMatch, out var noneMatch) && !string.IsNullOrWhiteSpace(noneMatch) &&
-                    string.Equals(etagValue, noneMatch, System.StringComparison.Ordinal))
+                    httpContext.Request.Headers.TryGetHeaderString(HeaderNames.IfNoneMatch, out var noneMatch) &&
+                    string.Equals(etag, noneMatch, StringComparison.Ordinal))
                 {
                     resultContext.Result = new StatusCodeResult(304);
                 }

src/Squidex/app/shared/state/contents.state.ts

@@ -56,7 +56,7 @@ interface Snapshot {
 }
 
 function sameContent(lhs: ContentDto, rhs?: ContentDto): boolean {
-    return lhs === rhs || (!!lhs && !!rhs && lhs.id === rhs.id && lhs.version.eq(lhs.version));
+    return lhs === rhs || (!!lhs && !!rhs && lhs.id === rhs.id && lhs.version.eq(rhs.version));
 }
 
 export abstract class ContentsStateBase extends State<Snapshot> {

tests/Squidex.Domain.Apps.Entities.Tests/Contents/Queries/ContentLoaderTests.cs

@@ -50,6 +50,17 @@ namespace Squidex.Domain.Apps.Entities.Contents.Queries
             await Assert.ThrowsAsync<DomainObjectNotFoundException>(() => sut.GetAsync(id, 10));
         }
 
+        [Fact]
+        public async Task Should_not_throw_exception_if_state_has_other_version_than_any()
+        {
+            var content = new ContentEntity { Version = 5 };
+
+            A.CallTo(() => grain.GetStateAsync(10))
+                .Returns(J.Of<IContentEntity>(content));
+
+            await sut.GetAsync(id, EtagVersion.Any);
+        }
+
         [Fact]
         public async Task Should_return_content_from_state()
         {

tests/Squidex.Web.Tests/CommandMiddlewares/ETagCommandMiddlewareTests.cs

@@ -10,6 +10,7 @@ using FakeItEasy;
 using Microsoft.AspNetCore.Http;
 using Microsoft.Extensions.Primitives;
 using Microsoft.Net.Http.Headers;
+using Squidex.Domain.Apps.Entities.Contents;
 using Squidex.Domain.Apps.Entities.Contents.Commands;
 using Squidex.Infrastructure.Commands;
 using Xunit;
@@ -45,6 +46,19 @@ namespace Squidex.Web.CommandMiddlewares
             Assert.Null(command.Actor);
         }
 
+        [Fact]
+        public async Task Should_do_nothing_if_command_has_etag_defined()
+        {
+            httpContext.Request.Headers[HeaderNames.IfMatch] = "13";
+
+            var command = new CreateContent { ExpectedVersion = 1 };
+            var context = Ctx(command);
+
+            await sut.HandleAsync(context);
+
+            Assert.Equal(1, context.Command.ExpectedVersion);
+        }
+
         [Fact]
         public async Task Should_add_expected_version_to_command()
         {
@@ -72,7 +86,7 @@ namespace Squidex.Web.CommandMiddlewares
         }
 
         [Fact]
-        public async Task Should_add_etag_header_to_response()
+        public async Task Should_add_version_from_result_as_etag_to_response()
         {
             var command = new CreateContent();
             var context = Ctx(command);
@@ -84,6 +98,19 @@ namespace Squidex.Web.CommandMiddlewares
             Assert.Equal(new StringValues("17"), httpContextAccessor.HttpContext.Response.Headers[HeaderNames.ETag]);
         }
 
+        [Fact]
+        public async Task Should_add_version_from_entity_as_etag_to_response()
+        {
+            var command = new CreateContent();
+            var context = Ctx(command);
+
+            context.Complete(new ContentEntity { Version = 17 });
+
+            await sut.HandleAsync(context);
+
+            Assert.Equal(new StringValues("17"), httpContextAccessor.HttpContext.Response.Headers[HeaderNames.ETag]);
+        }
+
         private CommandContext Ctx(ICommand command)
         {
             return new CommandContext(command, commandBus);

tests/Squidex.Web.Tests/Pipeline/ETagFilterTests.cs

@@ -38,12 +38,22 @@ namespace Squidex.Web.Pipeline
             };
         }
 
+        [Fact]
+        public async Task Should_not_convert_already_weak_tag()
+        {
+            httpContext.Response.Headers[HeaderNames.ETag] = "W/13";
+
+            await sut.OnActionExecutionAsync(executingContext, Next());
+
+            Assert.Equal("W/13", httpContext.Response.Headers[HeaderNames.ETag]);
+        }
+
         [Fact]
         public async Task Should_convert_strong_to_weak_tag()
         {
             httpContext.Response.Headers[HeaderNames.ETag] = "13";
 
-            await sut.OnActionExecutionAsync(executingContext, () => Task.FromResult(executedContext));
+            await sut.OnActionExecutionAsync(executingContext, Next());
 
             Assert.Equal("W/13", httpContext.Response.Headers[HeaderNames.ETag]);
         }
@@ -53,7 +63,7 @@ namespace Squidex.Web.Pipeline
         {
             httpContext.Response.Headers[HeaderNames.ETag] = string.Empty;
 
-            await sut.OnActionExecutionAsync(executingContext, () => Task.FromResult(executedContext));
+            await sut.OnActionExecutionAsync(executingContext, Next());
 
             Assert.Null((string)httpContext.Response.Headers[HeaderNames.ETag]);
         }
@@ -66,7 +76,7 @@ namespace Squidex.Web.Pipeline
 
             httpContext.Response.Headers[HeaderNames.ETag] = "13";
 
-            await sut.OnActionExecutionAsync(executingContext, () => Task.FromResult(executedContext));
+            await sut.OnActionExecutionAsync(executingContext, Next());
 
             Assert.Equal(304, (executedContext.Result as StatusCodeResult).StatusCode);
         }
@@ -79,9 +89,14 @@ namespace Squidex.Web.Pipeline
 
             httpContext.Response.Headers[HeaderNames.ETag] = "13";
 
-            await sut.OnActionExecutionAsync(executingContext, () => Task.FromResult(executedContext));
+            await sut.OnActionExecutionAsync(executingContext, Next());
 
             Assert.Equal(200, (executedContext.Result as StatusCodeResult).StatusCode);
         }
+
+        private ActionExecutionDelegate Next()
+        {
+            return () => Task.FromResult(executedContext);
+        }
     }
 }