delphimvcframework/sources/MVCFramework.Middleware.CORS.pas

{***************************************************************************}
{                                                                           }
{           Delphi MVC Framework                                            }
{                                                                           }
{           Copyright (c) 2010-2015 DMVCFramework Team                      }
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{           https://github.com/danieleteti/delphimvcframework               }
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{***************************************************************************}
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{  Licensed under the Apache License, Version 2.0 (the "License");          }
{  you may not use this file except in compliance with the License.         }
{  You may obtain a copy of the License at                                  }
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{      http://www.apache.org/licenses/LICENSE-2.0                           }
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{  Unless required by applicable law or agreed to in writing, software      }
{  distributed under the License is distributed on an "AS IS" BASIS,        }
{  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. }
{  See the License for the specific language governing permissions and      }
{  limitations under the License.                                           }
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{***************************************************************************}

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.