Additional JsonApiClient to access multiple ServiceStack instances

Blazor WASM
1

I would like to instantiate an additional JsonApiClient on Blazor WASM to communicate with an additional ServiceStack instance but the IClientFactory always returns the same instance of HttpClient.

Is it possible to override this behaviour in some way so that I can have a JsonApiClient that binds to my main ServiceStack instance and then create another JsonApiClient that I can use to connect to another subordinate ServiceStack instance?

2

This is the registration of AddBlazorServerIdentityApiClient() which is used to register the default JsonApiClient:

Which needs to handle supporting both internal Gateway API requests and external HTTP API requests. You wont be able to use this machinery to configure a client with a different external base url.

One solution would be create your own typed HttpClient by registering a subclass of JsonApiClient which you can register with your preferred base URL:

services.AddHttpClient<MyJsonApiClient>(client => {
    client.BaseAddress = new Uri(myBaseUrl);
    config.HttpClientFilter?.Invoke(client);
});

Alternatively ignore the IOC and use your own client instance in your component, e.g:

var client = new JsonApiClient(myBaseUrl);
1 Like
3

I tried with the below:

var client = new JsonApiClient(myBaseUrl);

but I get:

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.BrowserHttpHandler.set_Credentials(ICredentials value)
   at System.Net.Http.HttpClientHandler.set_UseDefaultCredentials(Boolean value)
   at ServiceStack.JsonApiClient.GetHttpClient() in /home/runner/work/ServiceStack/ServiceStack/ServiceStack/src/ServiceStack.Client/JsonApiClient.cs:line 180

I think I need to do this to work around “browser” / WASM platform restrictions:

var client = new JsonApiClient(myBaseUrl);
client.HttpMessageHandler = new HttpClientHandler
{
};

Thank you for your fast reply!

1 Like