ASP.NET Core - want to force text/plain with Results.Ok(<string>)-CodePudding

Trying to replicate a Framework API using .NET Core 6 and minimal APIs. One thing is I am getting "application/json" as the content-type if I return Results.Ok(data).

Yes it should be json, but this is replicating legacy functionality. I can get the results to be text/plain if I just use return data;.

But would like to use Results if I can.

Setting this does not work:

context.Response.ContentType = "text/plain";
return Results.Ok(data);

Still comes back application/json.

Any suggestions?

CodePudding user response：

You can specify a custom IResult type for text/plain

class PlainTextResult : IResult
{
    private readonly string _text;

    public PlainTextResult(string text)
    {
        _text = text;
    }

    public Task ExecuteAsync(HttpContext httpContext)
    {
        httpContext.Response.StatusCode = 200;
        httpContext.Response.ContentType = MediaTypeNames.Text.Plain;
        httpContext.Response.ContentLength = Encoding.UTF8.GetByteCount(_text);
        return httpContext.Response.WriteAsync(_text);
    }
}

Then you just return that in your MapGet like so

app.MapGet("/text", () =>  new PlainTextResult("This is plain text"));

As a side note, there is also the result type of Text that takes a content type parameter

return Results.Text("This is plain text", "text/plain", Encoding.UTF8);

CodePudding user response：

Sounds like you want to use Results.Json:

Results.Json(data, contentType:"text/plain");