Tingle.Extensions.Http.Authentication 4.13.0

Tingle.Extensions.Http.Authentication

This library adds support for custom authentication via the Authorization header when using HttpClient. In some cases, setting the header once is not sufficient. Instead you may want to refresh the token only after it expires. This functionality builds upon the DelegatingHandler and hence can be used via DI using IHttpClientBuilder or without by wrapping inner handlers.

Also see sample.

The supported authentication patterns:

API Key in the Authorization header

Example:

builder.Services.AddHttpClient<MyCustomClient>()
                .AddApiKeyHeaderAuthenticationHandler("my-api-key-here", scheme: "Bearer");

This will add an Authorization header → Authorization: Bearer my-api-key-here

API Key in the query string

Example:

builder.Services.AddHttpClient<MyCustomClient>()
                .AddApiKeyQueryAuthenticationHandler("my-api-key-here", queryParameterName: "key");

This will append to the query string of the request before the request is sent out. E.g. https://contoso.com/?key=my-api-key-here

Pre-Shared Key (PSK) in the Authorization header

This behaves similar to Microsoft's shared key authentication which you can also use in your own projects. Every request ends up with a different authorization value and can be safer in some situations compared to using OAuth.

builder.Services.AddHttpClient($"{nameof(Worker)}4")
                .AddSharedKeyAuthenticationHandler("my-base-64-encoded-key", scheme: "Bearer");

This will add an Authorization here → Authorization: Bearer {base64-request-hash-will-be-set-here}

OAuth Client Credentials

This follows the OAuth 2.0 client_credentials flow and optionally caches access tokens using IMemoryCache or IDistributedCache for the duration it is valid.

Example:

builder.Services.AddMemoryCache();
builder.Services.AddDistributedMemoryCache();
builder.Services.AddHttpClient<MyCustomClient>()
                .AddAuthenticationHandler(provider => new OAuthClientCredentialHandler()
                {
                    Scheme = "Bearer",

                    // set OAuth values to match your scenario
                    AuthenticationEndpoint = "https://oauth-1.contoso.com",
                    Resource = "https://api.contoso.com",
                    ClientId = "awesome-app-id",
                    ClientSecret = "super-secret",

                    Logger = provider.GetRequiredService<ILogger<Program>>(), // optional, useful for debugging

                    // caching can be disabled by setting either CacheKey or Cache to null
                    CacheKey = $"{nameof(MyCustomClient)}:auth-token",
                    // either IMemoryCache or IDistributedCache
                    Cache = new(provider.GetRequiredService<Microsoft.Extensions.Caching.Memory.IMemoryCache>()),
                    //Cache = new(provider.GetRequiredService<Microsoft.Extensions.Caching.Distributed.IDistributedCache>()),
                });

Azure B2B via OAuth Client Credentials

Works like OAuth Client Credentials with a slight customization for Azure AD by setting the AuthorizationEndpoint based on the value supplied for TenantId.

Example:

builder.Services.AddMemoryCache();
builder.Services.AddDistributedMemoryCache();
builder.Services.AddHttpClient<MyCustomClient>()
                .AddAuthenticationHandler(provider => new AzureAdB2BHandler
                {
                    Scheme = "Bearer",

                    // set OAuth values to match your scenario
                    TenantId = "00000000-0000-1111-0001-000000000000",
                    Resource = "https://api.contoso.com",
                    ClientId = "awesome-app-id",
                    ClientSecret = "super-secret",

                    Logger = provider.GetRequiredService<ILogger<Program>>(), // optional, useful for debugging

                    // caching can be disabled by setting either CacheKey or Cache to null
                    CacheKey = $"{nameof(MyCustomClient)}:auth-token",
                    // either IMemoryCache or IDistributedCache
                    Cache = new(provider.GetRequiredService<Microsoft.Extensions.Caching.Memory.IMemoryCache>()),
                    //Cache = new(provider.GetRequiredService<Microsoft.Extensions.Caching.Distributed.IDistributedCache>()),
                });