OAuthHandler

Namespace: E2E.OAuth

public sealed class OAuthHandler : DelegatingHandler, IDisposable

The handler a subscription model’s HttpClient sends through. Per request it reads the stored credentials, refreshes them ahead of expiry, replaces any API key header with the bearer token, and lets the provider adjust the request. On a 401 it refreshes once and retries, or, with nothing to refresh, reports that the user signs in again. One refresh serves every model and every concurrent call over the same store, because vendors that rotate refresh tokens reject the second concurrent refresh.

Inheritance: object → HttpMessageHandler → DelegatingHandler

Implements: IDisposable

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Constructors

OAuthHandler(IOAuthProvider, ICredentialStore, string?, HttpMessageHandler?)

public OAuthHandler(IOAuthProvider provider, ICredentialStore store, string? loginHint = null, HttpMessageHandler? inner = null)

Parameters

Name	Type	Description
provider	IOAuthProvider
store	ICredentialStore
loginHint	string
inner	HttpMessageHandler

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Methods

SendAsync(HttpRequestMessage, CancellationToken)

protected override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)

Sends an HTTP request to the inner handler to send to the server as an asynchronous operation.

Parameters

Name	Type	Description
request	HttpRequestMessage	The HTTP request message to send to the server.
cancellationToken	CancellationToken	A cancellation token to cancel operation.

Returns: Task<HttpResponseMessage> — The task object representing the asynchronous operation.

Exceptions

Type	Condition
ArgumentNullException	The <code class=“paramref”>request</code> was <a href=“https://learn.microsoft.com/dotnet/csharp/language-reference/keywords/null"&gt;null&lt;/a>.
OperationCanceledException	The cancellation token was canceled. This exception is stored into the returned task.

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