fetch request removes header information

[abhishekgoenka]

I am passing valid header to fetch api

fetch api code(Http.ts)

But request removes my headers.

[Suchiman]

I would suspect dotnet/blazor#815 (comment) fixes this as a side effect, you could try a CI build to see if it does: https://github.com/aspnet/Blazor#using-ci-builds-of-blazor

[SteveSandersonMS]

Yes, this is fixed in 0.4.0. Thanks for reporting it, though!

[abhishekgoenka]

I took the latest code but still facing the same issue. The only change I have made is requestInit.mode = 'no-cors';

[Suchiman]

@abhishekgoenka you can set mode = "no-cors" just by using

var requestMessage = new HttpRequestMessage();
requestMessage.Properties.Add("BrowserHttpMessageHandler.FetchArgs", new { mode = "no-cors" });

But aside from that, i believe this isn't a bug, it's a feature.
https://developer.mozilla.org/en-US/docs/Web/API/Request/mode

no-cors — Prevents the method from being anything other than HEAD, GET or POST, and the headers from being anything other than simple headers.

Authorization and Content-Type: application/json are both not simple header, so you're asking for it.