/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is Mozilla Foundation.
 * Portions created by the Initial Developer are Copyright (C) 2007
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Jonas Sicking <jonas@sicking.cc> (Original Author)
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either of the GNU General Public License Version 2 or later (the "GPL"),
 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
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 * ***** END LICENSE BLOCK ***** */

#ifndef nsCORSListenerProxy_h__
#define nsCORSListenerProxy_h__

#include "nsIStreamListener.h"
#include "nsIInterfaceRequestor.h"
#include "nsCOMPtr.h"
#include "nsString.h"
#include "nsIURI.h"
#include "nsTArray.h"
#include "nsIInterfaceRequestor.h"
#include "nsIChannelEventSink.h"
#include "nsIAsyncVerifyRedirectCallback.h"

class nsIURI;
class nsIParser;
class nsIPrincipal;

extern PRBool
IsValidHTTPToken(const nsCSubstring& aToken);

nsresult
NS_StartCORSPreflight(nsIChannel* aRequestChannel,
                      nsIStreamListener* aListener,
                      nsIPrincipal* aPrincipal,
                      PRBool aWithCredentials,
                      nsTArray<nsCString>& aACUnsafeHeaders,
                      nsIChannel** aPreflightChannel);

class nsCORSListenerProxy : public nsIStreamListener,
                            public nsIInterfaceRequestor,
                            public nsIChannelEventSink,
                            public nsIAsyncVerifyRedirectCallback
{
public:
  nsCORSListenerProxy(nsIStreamListener* aOuter,
                      nsIPrincipal* aRequestingPrincipal,
                      nsIChannel* aChannel,
                      PRBool aWithCredentials,
                      nsresult* aResult);
  nsCORSListenerProxy(nsIStreamListener* aOuter,
                      nsIPrincipal* aRequestingPrincipal,
                      nsIChannel* aChannel,
                      PRBool aWithCredentials,
                      const nsCString& aPreflightMethod,
                      const nsTArray<nsCString>& aPreflightHeaders,
                      nsresult* aResult);

  NS_DECL_ISUPPORTS
  NS_DECL_NSIREQUESTOBSERVER
  NS_DECL_NSISTREAMLISTENER
  NS_DECL_NSIINTERFACEREQUESTOR
  NS_DECL_NSICHANNELEVENTSINK
  NS_DECL_NSIASYNCVERIFYREDIRECTCALLBACK

  // Must be called at startup.
  static void Startup();

  static void Shutdown();

private:
  nsresult UpdateChannel(nsIChannel* aChannel);
  nsresult CheckRequestApproved(nsIRequest* aRequest);

  nsCOMPtr<nsIStreamListener> mOuterListener;
  nsCOMPtr<nsIPrincipal> mRequestingPrincipal;
  nsCOMPtr<nsIInterfaceRequestor> mOuterNotificationCallbacks;
  PRBool mWithCredentials;
  PRBool mRequestApproved;
  PRBool mHasBeenCrossSite;
  PRBool mIsPreflight;
  nsCString mPreflightMethod;
  nsTArray<nsCString> mPreflightHeaders;
  nsCOMPtr<nsIAsyncVerifyRedirectCallback> mRedirectCallback;
  nsCOMPtr<nsIChannel> mOldRedirectChannel;
  nsCOMPtr<nsIChannel> mNewRedirectChannel;
};

#endif
