Asp.net Core+OpenIddict集成Yahoo OAuth回调URL合规问题求助

Hey there, I’ve dealt with this exact Yahoo OAuth limitation before—their strict rule against using "Yahoo" anywhere in the callback URL (including the default /signin-yahoo path) is definitely a gotcha, but we can work around it easily with ASP.NET Core’s OAuth middleware settings.

Here’s how to set it up correctly:

Step 1: Override the Yahoo Callback Path #

When configuring the Yahoo authentication provider in your Program.cs (or Startup.cs), explicitly set a custom callback path that doesn’t include "Yahoo" in any form. For example, use /signin-oauth or /signin-yh—something Yahoo’s validation will accept.

builder.Services.AddAuthentication()
    .AddYahoo(options =>
    {
        // Load your Yahoo client ID/secret from configuration
        options.ClientId = builder.Configuration["Authentication:Yahoo:ClientId"];
        options.ClientSecret = builder.Configuration["Authentication:Yahoo:ClientSecret"];
        
        // Replace the default /signin-yahoo with a custom path
        options.CallbackPath = "/signin-oauth";
    });

Step 2: Update Yahoo Developer Console #

Head over to your Yahoo Developer Dashboard and update the allowed callback URLs for your application to match this new path. For example, add https://mysite.co.uk/signin-oauth to the list of approved redirect URIs. This is critical—Yahoo will reject any callback request that doesn’t match an approved URL.

Step 3: Ensure OpenIddict Recognizes the Custom Path #

If you’re using OpenIddict as your authentication server, you don’t need extra configuration here—ASP.NET Core’s authentication middleware will automatically map the custom callback path to the Yahoo authentication scheme. The OpenIddict pipeline will pick up the authenticated user context once the Yahoo flow completes successfully.

Quick Note on the GitHub Discussion #

As you saw in the GitHub thread, this approach is exactly what’s recommended: overriding the CallbackPath property to avoid triggering Yahoo’s naming restriction. It’s a clean, supported fix that doesn’t require hacking the framework—just leveraging the built-in configuration options.

Give this setup a test, and you should be able to complete Yahoo authentication without hitting that frustrating restriction!

内容的提问来源于stack exchange，提问作者Mark Perry