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SignalR not being established for MVC public web app #4648

Sturla created 3 years ago

We are having problems connecting SignalR to the public MVC page and are getting the following error

We have successfully been using SignalR for our Blazor WASM backend (hosted as static website in Azure) so we know all about how SignalR should work (or we thought at least).

We have been trying all kinds versions of CORS settings in HttpApi.Host without luck

This didn´t do anything (now we are just using app.UseCors())

  app.UseCors(x => x
           .AllowAnyMethod()
           .AllowAnyHeader()
           .SetIsOriginAllowed(origin => true)
           .AllowCredentials());

Is there a documentation or some other steps that we might be missing for for connecting with signalR in MVC public web app?

ABP Framework version: 7.0.2
UI type: MVC
DB provider: EF Core
Tiered (MVC) or Identity Server Separated: yes

8 Answer(s)

gterdem created 3 years ago

Senior .NET Developer

You are using wildcard ('*') with .AllowCredentials. You need to whitelist the origins.

You can configure CORS in publicwebdev app as:

context.Services.AddCors(options =>
{
    options.AddDefaultPolicy(builder =>
    {
        builder
            .WithOrigins("https://eventstreamingapidev.azurewebsites.net")
            .WithAbpExposedHeaders()
            .SetIsOriginAllowedToAllowWildcardSubdomains()
            .AllowAnyHeader()
            .AllowAnyMethod()
            .AllowCredentials();
    });
});

0

Sturla created 3 years ago

Hi @gterdem, thanks for the answer

We have been trying to use this without luck. Is there something more we need to do? There is some puzzle missing..

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gterdem created 3 years ago
Senior .NET Developer

Did you also add https://eventstreamingpublicwebdev.azurewebsites.net to https://eventstreamingapidev.azurewebsites.net CORS origins?

Can you try removing .AllowCredentials(); and test again?

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alper created 3 years ago
Support Team Director

the question has been reopened due to the owner's request

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Sturla created 3 years ago

For some reason we are not getting this to work. We are now on 7.1.1 but that doesn´t seem to matter.

Here are is our setup. Do you see something wrong/missing here?

This is our httpApi.Host setup

and this is our Web.Public one

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gterdem created 3 years ago
Senior .NET Developer

Did you try removing .AllowCredentials(); and tested again?

Do you still get the same error? Did you check the appsettings.json file is overridden correctly on deployment?

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Sturla created 3 years ago

Hi @gterdem

As you can see in my images there is no .AllowCredentials(); we have removed that. Here is our settings file and looking at it it looks like we are missing the CORS settings... correct?

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gterdem created 3 years ago
Senior .NET Developer

Yes, if you can check the module ConfigureServices method that has CORS configuration, you are basically missing it.

You may also forget to override it on production environment aswell.

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