JWT Authentication and Swagger with .Net core 3.0

Question

I am developing some Web Api with .Net core 3.0 and want to integrate it with SwashBuckle.Swagger. It is working fine, but when I add JWT authentication, it does not work as

Answer 1

Here's a solution updated for Swashbuckle.AspNetCore 5.3.2, integrated with IdentityServer4, with an API secured using a Bearer token.

In ConfigureServices() method:

        services.AddSwaggerGen(options =>
        {
            options.SwaggerDoc("v1", new OpenApiInfo { Title = "My API", Version = "v1" });
            options.AddSecurityDefinition("Bearer", SecuritySchemes.BearerScheme(Configuration));
            options.AddSecurityRequirement(new OpenApiSecurityRequirement()
            {
                { SecuritySchemes.OAuthScheme, new List() }
            });
        });

In Configure() method:

        app.UseSwaggerUI(options =>
        {
            options.SwaggerEndpoint("/My.Api/swagger/v1/swagger.json", "My API V1");
            options.OAuthClientId(Clients.TestClient);
            options.OAuthAppName("My Api - Swagger");
            options.OAuthClientSecret(Configuration["TestClientSecret"]);
        });

internal static class SecuritySchemes
{
    public static OpenApiSecurityScheme BearerScheme(IConfiguration config) => new OpenApiSecurityScheme
    {
        Type = SecuritySchemeType.OAuth2,
        Description = "Standard authorisation using the Bearer scheme. Example: \"bearer {token}\"",
        In = ParameterLocation.Header,
        Name = "Authorization",
        Scheme = "Bearer",
        OpenIdConnectUrl = new System.Uri($"{config["TokenServerUrl"]}.well-known/openid-configuration"),
        BearerFormat = "JWT",
        Flows = new OpenApiOAuthFlows
        {
            Password = new OpenApiOAuthFlow
            {
                AuthorizationUrl = new System.Uri($"{config["TokenServerUrl"]}connect/authorize"),
                Scopes = new Dictionary
                    {
                        { Scopes.Api, "My Api" }
                    },
                TokenUrl = new System.Uri($"{config["TokenServerUrl"]}connect/token")
            }
        }
    };

    public static OpenApiSecurityScheme OAuthScheme => new OpenApiSecurityScheme
    {
        Reference = new OpenApiReference
        {
            Type = ReferenceType.SecurityScheme,
            Id = "Bearer"
        },
        Scheme = "oauth2",
        Name = "Bearer",
        In = ParameterLocation.Header,

    };
}