IdentityServer4 discovery document returns 404

Question

I am following the quick start for ID Server 4 with one exception that I am working on a Mac with .NET Core 2.1.302. Somehow when I navigate to http://localhost:5000/.well-known/openid-configuration I get a 404:

info: Microsoft.AspNetCore.Hosting.Internal.WebHost[1]
      Request starting HTTP/1.1 GET http://localhost:5000/.well-known/openid-configuration  
info: Microsoft.AspNetCore.Hosting.Internal.WebHost[2]
      Request finished in 0.108ms 404 

Here are the steps that I took:

1. Created a new MVC project dotnet new mvc
2. Added ID Server dotnet add package IdentityServer4

3. Modified my service configuration by adding

       services.AddIdentityServer()
           .AddDeveloperSigningCredential()
           .AddInMemoryApiResources(Config.GetApiResources())
           .AddInMemoryClients(Config.GetClients());
   

4. Created Config.cs with:

   public static IEnumerable<ApiResource> GetApiResources()
   {
       return new List<ApiResource>
       {
           new ApiResource("api1", "My API")
       };
   }
   
   public static IEnumerable<Client> GetClients()
   {
       return new List<Client>
       {
           new Client
           {
               ClientId = "client",
   
               // no interactive user, use the clientid/secret for authentication
               AllowedGrantTypes = GrantTypes.ClientCredentials,
   
               // secret for authentication
               ClientSecrets =
               {
                   new Secret("secret".Sha256())
               },
   
               // scopes that client has access to
               AllowedScopes = { "api1" }
           }
       };
   

When I navigate to http://localhost:5000/.well-known/openid-configuration I get a 404 instead of the discovery document. Any ideas?

Answer 1

Missing from your list of of steps is adding UseIdentityServer inside of your Startup's Configure method. It's covered in the official docs and looks something like this:

public void Configure(IApplicationBuilder app, IHostingEnvironment env)
{
    // ...

    app.UseIdentityServer();
    app.UseMvc(...);
}

UseIdentityServer adds the IdentityServer middleware into the ASP.NET Core pipeline. One of its responsibilities is to serve up the .well-known endpoints.