C#•3mo ago

✅ Minimal API: Pass app config to IEndpointRouteBuilder

I am using route builders to map routes for a minimal API, like this:

public static class LicenseApplicationEndpoints
{
    private static EndpointsConfig _config = new EndpointsConfig();

    public static void RegisterLicenseApplicationEndPoints(this IEndpointRouteBuilder routes)
    {
        var group = routes.MapGroup($"{_config.RoutePrefix}/licenseApplications");

        group.MapGet("/forUser{userId:guid}",
            ([FromServices] ILicenseApplicationService service, Guid userId) =>
                service.GetLicenseApplicationsForUser(userId));
    }
}

public static class LicenseApplicationEndpoints
{
    private static EndpointsConfig _config = new EndpointsConfig();

    public static void RegisterLicenseApplicationEndPoints(this IEndpointRouteBuilder routes)
    {
        var group = routes.MapGroup($"{_config.RoutePrefix}/licenseApplications");

        group.MapGet("/forUser{userId:guid}",
            ([FromServices] ILicenseApplicationService service, Guid userId) =>
                service.GetLicenseApplicationsForUser(userId));
    }
}

I'd like to access the app's IConfiguration from within these classes and am hoping there is a better way than reading config values in Program and passing them to each register endpoints method. I'd really like to receive config values or IConfiguration as ctor parameters.

2 Replies

Becquerel•3mo ago

Would making your extension method off of WebApplication instead be viable?

    public static void AddAppEndpoints(this WebApplication app)
    {
        // app.Services.GetRequiredService()...
        // app.Configuration.GetValue<>()...
        app.MapGet("/current", (PostStore store) => store.Current.ToJsonOrNotFound());

    public static void AddAppEndpoints(this WebApplication app)
    {
        // app.Services.GetRequiredService()...
        // app.Configuration.GetValue<>()...
        app.MapGet("/current", (PostStore store) => store.Current.ToJsonOrNotFound());

This snippet is from my toy web app

Brady Kelly•3mo ago

Thanks, it looks like it would be, as WebApplication also seems to implement IEndpointRouteBuilder, allowing me to call app.MapGroup. I'll have to have a look in a short while.

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✅ Minimal API: Pass app config to IEndpointRouteBuilder