delphimvcframework/sources/MVCFramework.Middleware.CORS.pas

unit MVCFramework.Middleware.CORS;

interface

uses
	MVCFramework;

type
	TCORSMiddleware = class(TInterfacedObject, IMVCMiddleware)
	public
		procedure OnBeforeRouting(Context: TWebContext; var Handled: Boolean);
		procedure OnAfterControllerAction(Context: TWebContext;
			const AActionNAme: string; const Handled: Boolean);
		procedure OnBeforeControllerAction(Context: TWebContext;
			const AControllerQualifiedClassName: string; const AActionNAme: string;
			var Handled: Boolean);
	end;

implementation

{ TCORSMiddleware }

procedure TCORSMiddleware.OnAfterControllerAction(Context: TWebContext;
	const AActionNAme: string; const Handled: Boolean);
begin
end;

procedure TCORSMiddleware.OnBeforeControllerAction(Context: TWebContext;
	const AControllerQualifiedClassName, AActionNAme: string;
	var Handled: Boolean);
begin
	// do nothing
end;

procedure TCORSMiddleware.OnBeforeRouting(Context: TWebContext;
	var Handled: Boolean);
begin
	Context.Response.RawWebResponse.CustomHeaders.Values
		['Access-Control-Allow-Origin'] := '*';
	Context.Response.RawWebResponse.CustomHeaders.Values
		['Access-Control-Allow-Methods'] :=
		'POST, GET, OPTIONS, PUT, DELETE';
	Context.Response.RawWebResponse.CustomHeaders.Values
		['Access-Control-Allow-Headers'] := 'content-type';

	if Context.Request.HTTPMethod = httpOPTIONS then
	begin
		Context.Response.StatusCode := 200;
		Handled := True;
	end;
end;

end.