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Ryan Nowak
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Remove stateful prerendering
Fixes: #12245 Fixes: #12630 This change removes stateful pre-rendering from Server-Side Blazor. This means that when you render a component during the initial HTTP request, we we will no longer preserve the component instances and their parameters. While this feature was useful, it cause serious scalability concerns. This means that it will now be required to register "entry-point" components in startup similar to client-side Blazor.
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‎eng/ProjectReferences.props

-1
Original file line numberDiff line numberDiff line change
@@ -101,7 +101,6 @@
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<ProjectReferenceProvider Include="Microsoft.AspNetCore.Razor" ProjectPath="$(RepoRoot)src\Razor\Razor\src\Microsoft.AspNetCore.Razor.csproj" RefProjectPath="$(RepoRoot)src\Razor\Razor\ref\Microsoft.AspNetCore.Razor.csproj" />
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<ProjectReferenceProvider Include="Microsoft.AspNetCore.Mvc.Abstractions" ProjectPath="$(RepoRoot)src\Mvc\Mvc.Abstractions\src\Microsoft.AspNetCore.Mvc.Abstractions.csproj" RefProjectPath="$(RepoRoot)src\Mvc\Mvc.Abstractions\ref\Microsoft.AspNetCore.Mvc.Abstractions.csproj" />
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<ProjectReferenceProvider Include="Microsoft.AspNetCore.Mvc.ApiExplorer" ProjectPath="$(RepoRoot)src\Mvc\Mvc.ApiExplorer\src\Microsoft.AspNetCore.Mvc.ApiExplorer.csproj" RefProjectPath="$(RepoRoot)src\Mvc\Mvc.ApiExplorer\ref\Microsoft.AspNetCore.Mvc.ApiExplorer.csproj" />
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<ProjectReferenceProvider Include="Microsoft.AspNetCore.Mvc.Components.Prerendering" ProjectPath="$(RepoRoot)src\Mvc\Mvc.Components.Prerendering\src\Microsoft.AspNetCore.Mvc.Components.Prerendering.csproj" RefProjectPath="$(RepoRoot)src\Mvc\Mvc.Components.Prerendering\ref\Microsoft.AspNetCore.Mvc.Components.Prerendering.csproj" />
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<ProjectReferenceProvider Include="Microsoft.AspNetCore.Mvc.Core" ProjectPath="$(RepoRoot)src\Mvc\Mvc.Core\src\Microsoft.AspNetCore.Mvc.Core.csproj" RefProjectPath="$(RepoRoot)src\Mvc\Mvc.Core\ref\Microsoft.AspNetCore.Mvc.Core.csproj" />
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<ProjectReferenceProvider Include="Microsoft.AspNetCore.Mvc.Cors" ProjectPath="$(RepoRoot)src\Mvc\Mvc.Cors\src\Microsoft.AspNetCore.Mvc.Cors.csproj" RefProjectPath="$(RepoRoot)src\Mvc\Mvc.Cors\ref\Microsoft.AspNetCore.Mvc.Cors.csproj" />
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<ProjectReferenceProvider Include="Microsoft.AspNetCore.Mvc.DataAnnotations" ProjectPath="$(RepoRoot)src\Mvc\Mvc.DataAnnotations\src\Microsoft.AspNetCore.Mvc.DataAnnotations.csproj" RefProjectPath="$(RepoRoot)src\Mvc\Mvc.DataAnnotations\ref\Microsoft.AspNetCore.Mvc.DataAnnotations.csproj" />

‎eng/SharedFramework.Local.props

-1
Original file line numberDiff line numberDiff line change
@@ -73,7 +73,6 @@
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<AspNetCoreAppReference Include="Microsoft.AspNetCore.Razor" />
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<AspNetCoreAppReference Include="Microsoft.AspNetCore.Mvc.Abstractions" />
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<AspNetCoreAppReference Include="Microsoft.AspNetCore.Mvc.ApiExplorer" />
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<AspNetCoreAppReference Include="Microsoft.AspNetCore.Mvc.Components.Prerendering" />
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<AspNetCoreAppReference Include="Microsoft.AspNetCore.Mvc.Core" />
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<AspNetCoreAppReference Include="Microsoft.AspNetCore.Mvc.Cors" />
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<AspNetCoreAppReference Include="Microsoft.AspNetCore.Mvc.DataAnnotations" />

‎src/Components/Components.sln

-15
Original file line numberDiff line numberDiff line change
@@ -208,8 +208,6 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution
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..\..\.editorconfig = ..\..\.editorconfig
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EndProjectSection
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EndProject
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Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Microsoft.AspNetCore.Mvc.Components.Prerendering", "..\Mvc\Mvc.Components.Prerendering\src\Microsoft.AspNetCore.Mvc.Components.Prerendering.csproj", "{3A4132B6-60DA-43A0-8E7B-4BF346F3247C}"
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EndProject
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Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Microsoft.AspNetCore.SignalR.Protocols.Json", "..\SignalR\common\Protocols.Json\src\Microsoft.AspNetCore.SignalR.Protocols.Json.csproj", "{ED210157-461B-45BB-9D86-B81A62792C30}"
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EndProject
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Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Microsoft.AspNetCore.SignalR.Client", "..\SignalR\clients\csharp\Client\src\Microsoft.AspNetCore.SignalR.Client.csproj", "{DA137BD4-F7F1-4D53-855F-5EC40CEA36B0}"
@@ -1330,18 +1328,6 @@ Global
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{9088E4E4-B855-457F-AE9E-D86709A5E1F4}.Release|x64.Build.0 = Debug|Any CPU
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{9088E4E4-B855-457F-AE9E-D86709A5E1F4}.Release|x86.ActiveCfg = Debug|Any CPU
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{9088E4E4-B855-457F-AE9E-D86709A5E1F4}.Release|x86.Build.0 = Debug|Any CPU
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{3A4132B6-60DA-43A0-8E7B-4BF346F3247C}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{3A4132B6-60DA-43A0-8E7B-4BF346F3247C}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{3A4132B6-60DA-43A0-8E7B-4BF346F3247C}.Debug|x64.ActiveCfg = Debug|Any CPU
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{3A4132B6-60DA-43A0-8E7B-4BF346F3247C}.Debug|x64.Build.0 = Debug|Any CPU
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{3A4132B6-60DA-43A0-8E7B-4BF346F3247C}.Debug|x86.ActiveCfg = Debug|Any CPU
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{3A4132B6-60DA-43A0-8E7B-4BF346F3247C}.Debug|x86.Build.0 = Debug|Any CPU
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{3A4132B6-60DA-43A0-8E7B-4BF346F3247C}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{3A4132B6-60DA-43A0-8E7B-4BF346F3247C}.Release|Any CPU.Build.0 = Release|Any CPU
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{3A4132B6-60DA-43A0-8E7B-4BF346F3247C}.Release|x64.ActiveCfg = Release|Any CPU
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{3A4132B6-60DA-43A0-8E7B-4BF346F3247C}.Release|x64.Build.0 = Release|Any CPU
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{3A4132B6-60DA-43A0-8E7B-4BF346F3247C}.Release|x86.ActiveCfg = Release|Any CPU
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{3A4132B6-60DA-43A0-8E7B-4BF346F3247C}.Release|x86.Build.0 = Release|Any CPU
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{ED210157-461B-45BB-9D86-B81A62792C30}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{ED210157-461B-45BB-9D86-B81A62792C30}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{ED210157-461B-45BB-9D86-B81A62792C30}.Debug|x64.ActiveCfg = Debug|Any CPU
@@ -1548,7 +1534,6 @@ Global
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{04262990-929C-42BF-85A9-21C25FA95617} = {2FC10057-7A0A-4E34-8302-879925BC0102}
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{DC47C40A-FC38-44E4-94A4-ADE794E76309} = {2FC10057-7A0A-4E34-8302-879925BC0102}
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{9088E4E4-B855-457F-AE9E-D86709A5E1F4} = {7260DED9-22A9-4E9D-92F4-5E8A4404DEAF}
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{3A4132B6-60DA-43A0-8E7B-4BF346F3247C} = {2FC10057-7A0A-4E34-8302-879925BC0102}
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{ED210157-461B-45BB-9D86-B81A62792C30} = {2FC10057-7A0A-4E34-8302-879925BC0102}
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{DA137BD4-F7F1-4D53-855F-5EC40CEA36B0} = {2FC10057-7A0A-4E34-8302-879925BC0102}
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{0CDAB70B-71DC-43BE-ACB7-AD2EE3541FFB} = {2FC10057-7A0A-4E34-8302-879925BC0102}

‎src/Components/Server/ref/Microsoft.AspNetCore.Components.Server.netcoreapp3.0.cs

-18
Original file line numberDiff line numberDiff line change
@@ -14,8 +14,6 @@ public static partial class ComponentEndpointConventionBuilderExtensions
1414
}
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public static partial class ComponentEndpointRouteBuilderExtensions
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{
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public static Microsoft.AspNetCore.Builder.ComponentEndpointConventionBuilder MapBlazorHub(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder endpoints) { throw null; }
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public static Microsoft.AspNetCore.Builder.ComponentEndpointConventionBuilder MapBlazorHub(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder endpoints, System.Action<Microsoft.AspNetCore.Http.Connections.HttpConnectionDispatcherOptions> configureOptions) { throw null; }
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public static Microsoft.AspNetCore.Builder.ComponentEndpointConventionBuilder MapBlazorHub(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder endpoints, System.Type type, string selector) { throw null; }
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public static Microsoft.AspNetCore.Builder.ComponentEndpointConventionBuilder MapBlazorHub(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder endpoints, System.Type type, string selector, System.Action<Microsoft.AspNetCore.Http.Connections.HttpConnectionDispatcherOptions> configureOptions) { throw null; }
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public static Microsoft.AspNetCore.Builder.ComponentEndpointConventionBuilder MapBlazorHub(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder endpoints, System.Type componentType, string selector, string path) { throw null; }
@@ -36,22 +34,6 @@ public CircuitOptions() { }
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public System.TimeSpan DisconnectedCircuitRetentionPeriod { [System.Runtime.CompilerServices.CompilerGeneratedAttribute]get { throw null; } [System.Runtime.CompilerServices.CompilerGeneratedAttribute]set { } }
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public System.TimeSpan JSInteropDefaultCallTimeout { [System.Runtime.CompilerServices.CompilerGeneratedAttribute]get { throw null; } [System.Runtime.CompilerServices.CompilerGeneratedAttribute]set { } }
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}
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public partial class ComponentPrerenderingContext
40-
{
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public ComponentPrerenderingContext() { }
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public System.Type ComponentType { [System.Runtime.CompilerServices.CompilerGeneratedAttribute]get { throw null; } [System.Runtime.CompilerServices.CompilerGeneratedAttribute]set { } }
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public Microsoft.AspNetCore.Http.HttpContext Context { [System.Runtime.CompilerServices.CompilerGeneratedAttribute]get { throw null; } [System.Runtime.CompilerServices.CompilerGeneratedAttribute]set { } }
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public Microsoft.AspNetCore.Components.ParameterView Parameters { [System.Runtime.CompilerServices.CompilerGeneratedAttribute]get { throw null; } [System.Runtime.CompilerServices.CompilerGeneratedAttribute]set { } }
45-
}
46-
public sealed partial class ComponentPrerenderResult
47-
{
48-
internal ComponentPrerenderResult() { }
49-
public void WriteTo(System.IO.TextWriter writer) { }
50-
}
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public partial interface IComponentPrerenderer
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{
53-
System.Threading.Tasks.Task<Microsoft.AspNetCore.Components.Server.ComponentPrerenderResult> PrerenderComponentAsync(Microsoft.AspNetCore.Components.Server.ComponentPrerenderingContext context);
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}
5537
}
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namespace Microsoft.AspNetCore.Components.Server.Circuits
5739
{

‎src/Components/Server/src/Builder/ComponentEndpointRouteBuilderExtensions.cs

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@@ -15,42 +15,6 @@ namespace Microsoft.AspNetCore.Builder
1515
/// </summary>
1616
public static class ComponentEndpointRouteBuilderExtensions
1717
{
18-
/// <summary>
19-
/// Maps the Blazor <see cref="Hub" /> to the default path.
20-
/// </summary>
21-
/// <param name="endpoints">The <see cref="IEndpointRouteBuilder"/>.</param>
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/// <returns>The <see cref="ComponentEndpointConventionBuilder"/>.</returns>
23-
public static ComponentEndpointConventionBuilder MapBlazorHub(this IEndpointRouteBuilder endpoints)
24-
{
25-
if (endpoints == null)
26-
{
27-
throw new ArgumentNullException(nameof(endpoints));
28-
}
29-
30-
return endpoints.MapBlazorHub(configureOptions: _ => { });
31-
}
32-
33-
/// <summary>
34-
/// Maps the Blazor <see cref="Hub" /> to the default path.
35-
/// </summary>
36-
/// <param name="endpoints">The <see cref="IEndpointRouteBuilder"/>.</param>
37-
/// <param name="configureOptions">A callback to configure dispatcher options.</param>
38-
/// <returns>The <see cref="ComponentEndpointConventionBuilder"/>.</returns>
39-
public static ComponentEndpointConventionBuilder MapBlazorHub(this IEndpointRouteBuilder endpoints, Action<HttpConnectionDispatcherOptions> configureOptions)
40-
{
41-
if (endpoints == null)
42-
{
43-
throw new ArgumentNullException(nameof(endpoints));
44-
}
45-
46-
if (configureOptions == null)
47-
{
48-
throw new ArgumentNullException(nameof(configureOptions));
49-
}
50-
51-
return new ComponentEndpointConventionBuilder(endpoints.MapHub<ComponentHub>(ComponentHub.DefaultPath, configureOptions));
52-
}
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/// <summary>
5519
///Maps the Blazor <see cref="Hub" /> to the default path and associates
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/// the component <typeparamref name="TComponent"/> to this hub instance as the given DOM <paramref name="selector"/>.

‎src/Components/Server/src/Circuits/CircuitHost.cs

+4-39
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@@ -7,8 +7,6 @@
77
using System.Text.Json;
88
using System.Threading;
99
using System.Threading.Tasks;
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using Microsoft.AspNetCore.Components.Rendering;
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using Microsoft.AspNetCore.Components.Routing;
1210
using Microsoft.AspNetCore.Components.Web;
1311
using Microsoft.AspNetCore.Components.Web.Rendering;
1412
using Microsoft.Extensions.DependencyInjection;
@@ -57,7 +55,7 @@ public CircuitHost(
5755
CircuitClientProxy client,
5856
RendererRegistry rendererRegistry,
5957
RemoteRenderer renderer,
60-
IList<ComponentDescriptor> descriptors,
58+
IReadOnlyList<ComponentDescriptor> descriptors,
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RemoteJSRuntime jsRuntime,
6260
CircuitHandler[] circuitHandlers,
6361
ILogger logger)
@@ -92,24 +90,10 @@ public CircuitHost(
9290

9391
public RendererRegistry RendererRegistry { get; }
9492

95-
public IList<ComponentDescriptor> Descriptors { get; }
93+
public IReadOnlyList<ComponentDescriptor> Descriptors { get; }
9694

9795
public IServiceProvider Services { get; }
9896

99-
public Task<ComponentRenderedText> PrerenderComponentAsync(Type componentType, ParameterView parameters)
100-
{
101-
return Renderer.Dispatcher.InvokeAsync(async () =>
102-
{
103-
var result = await Renderer.RenderComponentAsync(componentType, parameters);
104-
105-
// When we prerender we start the circuit in a disconnected state. As such, we only call
106-
// OnCircuitOpenenedAsync here and when the client reconnects we run OnConnectionUpAsync
107-
await OnCircuitOpenedAsync(CancellationToken.None);
108-
109-
return result;
110-
});
111-
}
112-
11397
public void SetCircuitUser(ClaimsPrincipal user)
11498
{
11599
var authenticationStateProvider = Services.GetService<AuthenticationStateProvider>() as IHostEnvironmentAuthenticationStateProvider;
@@ -120,26 +104,6 @@ public void SetCircuitUser(ClaimsPrincipal user)
120104
}
121105
}
122106

123-
internal void InitializeCircuitAfterPrerender(UnhandledExceptionEventHandler unhandledException)
124-
{
125-
if (!_initialized)
126-
{
127-
_initialized = true;
128-
UnhandledException += unhandledException;
129-
var uriHelper = (RemoteUriHelper)Services.GetRequiredService<IUriHelper>();
130-
if (!uriHelper.HasAttachedJSRuntime)
131-
{
132-
uriHelper.AttachJsRuntime(JSRuntime);
133-
}
134-
135-
var navigationInterception = (RemoteNavigationInterception)Services.GetRequiredService<INavigationInterception>();
136-
if (!navigationInterception.HasAttachedJSRuntime)
137-
{
138-
navigationInterception.AttachJSRuntime(JSRuntime);
139-
}
140-
}
141-
}
142-
143107
internal void SendPendingBatches()
144108
{
145109
// Dispatch any buffered renders we accumulated during a disconnect.
@@ -233,7 +197,8 @@ await Renderer.Dispatcher.InvokeAsync(async () =>
233197
// That's because AddComponentAsync waits for quiescence, which can take
234198
// arbitrarily long. In the meantime we might need to be receiving and
235199
// processing incoming JSInterop calls or similar.
236-
for (var i = 0; i < Descriptors.Count; i++)
200+
var count = Descriptors.Count;
201+
for (var i = 0; i < count; i++)
237202
{
238203
var (componentType, domElementSelector, prerendered) = Descriptors[i];
239204
if (!prerendered)

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