How to invoke a client method that needs bearer token on request header?

[osoykan]

I didn't get exactly how NSwag interact with IdentityServerX bearer tokens and adds it request header conventionally ?My host api application implements IdentityServer3 with LDAP auth, so as far as i understand; if any host needs to a token for authentication then any client must send it on request header. So how can i deal with it while working NSwag clients ?

Any idea appreciated.
Thanks.

[lciocci]

This should help (if you're using C#): https://github.com/NSwag/NSwag/wiki/SwaggerToCSharpClientGenerator

Look at the /ClientBaseClass:[class name] and /UseHttpClientCreationMethod:true parameters. The /ClientBaseClass:[class name] causes the client proxy to inherit from a base class, and the /UserHttpClientCreationMethod:true allows you to override the creation of the default HttpClient. It's in there where you can then add your bearer token in the HttpClient's request header.

[grovesNL]

Are you generating a client for TypeScript or C#?

[osoykan]

@grovesNL , C# client.

@lciocci Where can i find the "UserHttpClientCreationMethod:true" option ?

[lciocci]

There are probably a few ways to do this, but we use NSwag command line (it's a NuGet package). Taken from the documentation:

nswag swagger2csclient /input:MyWebService.json 
                       /classname:MyServiceClient 
                       /UseHttpClientCreationMethod:true
                       /namespace:MyNamespace
                       /output:MyServiceClient.cs

[RicoSuter]

In order to use the feature you also have to define a ClientBaseClass. See https://github.com/NSwag/NSwag/wiki/SwaggerToCSharpClientGeneratorSettings

nswag swagger2csclient /Input:MyWebService.json 
                       /Classname:MyServiceClient 
                       /ClientBaseClass:MyBaseClass
                       /UseHttpClientCreationMethod:true
                       /Namespace:MyNamespace
                       /Output:MyServiceClient.cs

[RicoSuter]

The documentation for this can be found here: https://github.com/NSwag/NSwag/wiki/SwaggerToCSharpClientGenerator#implement-a-base-class

[osoykan]

Thanks guys.

I've resolved as you said by partial method.
My example is:

CampaignClient.cs

public partial class CampaignClient
{
    partial void PrepareRequest(HttpClient request, ref string url);

    partial void ProcessResponse(HttpClient request, HttpResponseMessage response);

    //some codes...
}

CampaignClient.Extensions.cs - partial class:

public partial class CampaignClient
{
    private readonly IRequestContext _requestContext;
    private readonly IStartupConfiguration _startupConfiguration;

    public CampaignClient(IRequestContext requestContext, IStartupConfiguration startupConfiguration)
    {
        _requestContext = requestContext;
        _startupConfiguration = startupConfiguration;
    }

    partial void PrepareRequest(HttpClient request, ref string url)
    {
        request.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", _requestContext.GetBearerTokenOrTriggerUnauthException());
    }
}

Method override has saved me!

See also Stackoverflow

[pratishthap]

what is IRequestContext and IStartupConfiguration? I cannot find these interfaces

[ViRuSTriNiTy]

what is IRequestContext and IStartupConfiguration? I cannot find these interfaces

It's from the AWSSDK.Core package...

[rebeccapowell]

Is GetBearerTokenOrTriggerUnauthException a custom extension method that you wrote?

Thanks guys.

I've resolved as you said by partial method. My example is:

CampaignClient.cs

public partial class CampaignClient
{
    partial void PrepareRequest(HttpClient request, ref string url);

    partial void ProcessResponse(HttpClient request, HttpResponseMessage response);

    //some codes...
}

CampaignClient.Extensions.cs - partial class:

public partial class CampaignClient
{
    private readonly IRequestContext _requestContext;
    private readonly IStartupConfiguration _startupConfiguration;

    public CampaignClient(IRequestContext requestContext, IStartupConfiguration startupConfiguration)
    {
        _requestContext = requestContext;
        _startupConfiguration = startupConfiguration;
    }

    partial void PrepareRequest(HttpClient request, ref string url)
    {
        request.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", _requestContext.GetBearerTokenOrTriggerUnauthException());
    }
}

Method override has saved me!

See also Stackoverflow

Is GetBearerTokenOrTriggerUnauthException a custom extension method that you wrote for HttpRequestMessage? You're copying the bearer token from the incoming request and passing it onwards correct?