Kiota C# Client crashes on Blazor WASM

[brad-technologik]

What are you generating using Kiota, clients or plugins?

API Client/SDK

In what context or format are you using Kiota?

Nuget tool

Client library/SDK language

Csharp

Describe the bug

When I try and import my Kiota C# in a Blazor WASM Project, the page gets an error whenever the Kiota client is injected into a page:

ManagedError: One or more errors occurred. (Operation is not supported on this platform.)

Expected behavior

Kiota C# client should work in Blazor. The error is kind of vague, but it may be related to multi threading which isn't supported in Blazor.

Given how Kiota and Blazor are both Microsoft products, I'd expect them work together.

How to reproduce

dotnet new blazor -ai -int WebAssembly -n KiotaBlazorBug
cd KiotaBlazorBug/KiotaBlazorBug.Client
dotnet add package Microsoft.Kiota.Bundle
kiota generate --language=CSharp -d https://petstore3.swagger.io/api/v3/openapi.json -o ./Client -c PetStoreClient -n KiotaBlazorBug.Client

Add the following code to Program.cs (In both KiotaBlazorBug/KiotaBlazorBug/Program.cs and KiotaBlazorBug/KiotaBlazorBug.Client)

builder.Services.AddSingleton<PetStoreClient>(e =>
{
    var authProvider = new AnonymousAuthenticationProvider();
    // Create request adapter using the HttpClient-based implementation
    var adapter = new HttpClientRequestAdapter(authProvider);
    // Create the API client
    return new PetStoreClient(adapter);
});

Add the following line to Counter.razor

@inject PetStoreClient PetStoreClient

Run the project

cd ../KiotaBlazorBug
dotnet run

Visit http://localhost:5003/counter in your Browser and observe the error and JS console.

Open API description file

Any one. https://petstore3.swagger.io/api/v3/openapi.json is an example.

Kiota Version

1.20.0+81bdb1bf13383a749f794d47926d09733d2d7be1

Latest Kiota version known to work for scenario above?(Not required)

No response

Known Workarounds

No response

Configuration

• OS: Mac OS 15.1 (24B83)

Debug output

Click to expand log

``` blazor.web.js:1 crit: Microsoft.AspNetCore.Components.WebAssembly.Rendering.WebAssemblyRenderer[100] Unhandled exception rendering component: Operation is not supported on this platform. System.PlatformNotSupportedException: Operation is not supported on this platform. at System.Net.Http.SocketsHttpHandler.set_Proxy(IWebProxy value) at Microsoft.Kiota.Http.HttpClientLibrary.KiotaClientFactory.GetDefaultHttpMessageHandler(IWebProxy proxy) at Microsoft.Kiota.Http.HttpClientLibrary.KiotaClientFactory.Create(HttpMessageHandler finalHandler, IRequestOption[] optionsForHandlers) at Microsoft.Kiota.Http.HttpClientLibrary.HttpClientRequestAdapter..ctor(IAuthenticationProvider authenticationProvider, IParseNodeFactory parseNodeFactory, ISerializationWriterFactory serializationWriterFactory, HttpClient httpClient, ObservabilityOptions observabilityOptions) at Program.<>c.<$>b__0_0(IServiceProvider e) in /Users/brad/tmp/kiota-bug/KiotaBlazorBug/KiotaBlazorBug.Client/Program.cs:line 12 at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitFactory(FactoryCallSite factoryCallSite, RuntimeResolverContext context) at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2[[Microsoft.Extensions.DependencyInjection.ServiceLookup.RuntimeResolverContext, Microsoft.Extensions.DependencyInjection, Version=9.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60],[System.Object, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].VisitCallSiteMain(ServiceCallSite callSite, RuntimeResolverContext argument) at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitCache(ServiceCallSite callSite, RuntimeResolverContext context, ServiceProviderEngineScope serviceProviderEngine, RuntimeResolverLock lockType) at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScopeCache(ServiceCallSite callSite, RuntimeResolverContext context) at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2[[Microsoft.Extensions.DependencyInjection.ServiceLookup.RuntimeResolverContext, Microsoft.Extensions.DependencyInjection, Version=9.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60],[System.Object, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].VisitCallSite(ServiceCallSite callSite, RuntimeResolverContext argument) at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.Resolve(ServiceCallSite callSite, ServiceProviderEngineScope scope) at Microsoft.Extensions.DependencyInjection.ServiceLookup.RuntimeServiceProviderEngine.<>c__DisplayClass4_0.b__0(ServiceProviderEngineScope scope) at Microsoft.Extensions.DependencyInjection.ServiceProvider.GetService(ServiceIdentifier serviceIdentifier, ServiceProviderEngineScope serviceProviderEngineScope) at Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngineScope.GetService(Type serviceType) at Microsoft.AspNetCore.Components.ComponentFactory.<>c__DisplayClass9_0.g__Initialize|1(IServiceProvider serviceProvider, IComponent component) at Microsoft.AspNetCore.Components.ComponentFactory.InstantiateComponent(IServiceProvider serviceProvider, Type componentType, IComponentRenderMode callerSpecifiedRenderMode, Nullable`1 parentComponentId) at Microsoft.AspNetCore.Components.RenderTree.Renderer.InstantiateChildComponentOnFrame(RenderTreeFrame[] frames, Int32 frameIndex, Int32 parentComponentId) at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.InitializeNewComponentFrame(DiffContext& diffContext, Int32 frameIndex) at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.InitializeNewSubtree(DiffContext& diffContext, Int32 frameIndex) at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.InsertNewFrame(DiffContext& diffContext, Int32 newFrameIndex) at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.AppendDiffEntriesForRange(DiffContext& diffContext, Int32 oldStartIndex, Int32 oldEndIndexExcl, Int32 newStartIndex, Int32 newEndIndexExcl) at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.ComputeDiff(Renderer renderer, RenderBatchBuilder batchBuilder, Int32 componentId, ArrayRange`1 oldTree, ArrayRange`1 newTree) at Microsoft.AspNetCore.Components.Rendering.ComponentState.RenderIntoBatch(RenderBatchBuilder batchBuilder, RenderFragment renderFragment, Exception& renderFragmentException) at Microsoft.AspNetCore.Components.RenderTree.Renderer.RenderInExistingBatch(RenderQueueEntry renderQueueEntry) at Microsoft.AspNetCore.Components.RenderTree.Renderer.ProcessRenderQueue()

</details>


### Other information

_No response_

[brad-technologik]

I found that Using a custom HttpClient is a workaround. i.e:

var adapter = new HttpClientRequestAdapter(authProvider, httpClient: new HttpClient());

[baywet]

Hi @brad-technologik
Thank you for using kiota and for reaching out.

Does it make any difference if you use the kiota factory method instead to get the http client?

[brad-technologik]

Yes, using KiotaClientFactory.Create() results in the same crash, in fact I found that KiotaClientFactory.Create() is what causes the crash (even if you never assign that variable to anything).

I pushed my minimal repro. You can comment/uncomment this line to toggle the crash.

[baywet]

Thank you for the additional information.

It's strange that blazor would be able to "translate" the call to new up an http client in the application code but not in a library.
My guess is that it's failing at the handler step.
Can you try calling that method and see whether that fails please?

kiota-dotnet/src/http/httpClient/KiotaClientFactory.cs

Line 176 in 7b2ded1

public static HttpMessageHandler GetDefaultHttpMessageHandler(IWebProxy? proxy = null)

[brad-technologik]

@baywet

Can you re-open this bug? It's not resolved.

I provided sufficient reproduction steps and I don't have the time to perform debugging to narrow down the root cause but I think it should remain in a backlog somewhere.

[baywet]

@brad-technologik can you at least take the time to run the last test I've suggested please?

[microsoft-github-policy-service]

This issue has been automatically marked as stale because it has been marked as requiring author feedback but has not had any activity for 4 days. It will be closed if no further activity occurs within 3 days of this comment.