MigrationsEndPoint throwing `InvalidOperationException: Incorrect Content-Type:` on load

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

I have Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore package installed and I use app.UseMigrationsEndPoint() on my Program.cs. Whenever I enter migrations url (/ApplyDatabaseMigrations) I get this exception:

Seems like its missing Content-Type application/x-www-form-urlencoded in Headers.

Expected Behavior

It should load the migrations page correctly and include application/x-www-form-urlencoded Content-Type header.

Steps To Reproduce

Run the project and go to .../ApplyDatabaseMigrations page https://github.com/Hantick/EntityFrameworkCoreBug

Exceptions (if any)

System.InvalidOperationException: Incorrect Content-Type: 
   at Microsoft.AspNetCore.Http.Features.FormFeature.InnerReadFormAsync(CancellationToken cancellationToken)
   at Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore.MigrationsEndPointMiddleware.GetDbContext(HttpContext context, ILogger logger)
   at Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore.MigrationsEndPointMiddleware.InvokeCore(HttpContext context)
   at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddlewareImpl.Invoke(HttpContext context)

.NET Version

7.0.100

Anything else?

[Tratcher]

Run the project and go to …/ApplyDatabaseMigrations page

You’re not supposed to navigate directly to the ApplyDatabaseMigrations page (GET), you’re supposed to click the ApplyMigrations button on the error page that submits a Form POST to that path with the necessary details.

https://github.com/dotnet/aspnetcore/blob/cf342f8ea5e642fa533bda30195d2666c51fad30/src/Middleware/Diagnostics.EntityFrameworkCore/src/Views/DatabaseErrorPage.cshtml#L90 https://github.com/dotnet/aspnetcore/blob/cf342f8ea5e642fa533bda30195d2666c51fad30/src/Middleware/Diagnostics.EntityFrameworkCore/src/Views/DatabaseErrorPage.cshtml#L117-L120

We could make this clearer by adding a check for POST and Content-Type: application/x-www-form-urlencoded here: https://github.com/dotnet/aspnetcore/blob/cf342f8ea5e642fa533bda30195d2666c51fad30/src/Middleware/Diagnostics.EntityFrameworkCore/src/MigrationsEndPointMiddleware.cs#L53-L55

We’d either produce a more specific error, log, or no-op.

[adityamandaleeka]

I think this is left open to address the last part of @Tratcher’s comment (improving what we do when this condition is hit).