pjs/uriloader/exthandler/nsExternalHelperAppService.h

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/* -*- Mode: C++; tab-width: 3; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* 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 the Mozilla browser.
*
* The Initial Developer of the Original Code is Netscape
* Communications, Inc. Portions created by Netscape are
* Copyright (C) 1999, Mozilla. All Rights Reserved.
*
* Contributor(s):
* Scott MacGregor <mscott@netscape.com>
*/
#ifndef nsExternalHelperAppService_h__
#define nsExternalHelperAppService_h__
#include "nsIExternalHelperAppService.h"
#include "nsIStreamListener.h"
#include "nsIFile.h"
#include "nsIFileStreams.h"
#include "nsIOutputStream.h"
#include "nsCOMPtr.h"
class nsExternalAppHandler;
class nsExternalHelperAppService : public nsIExternalHelperAppService, nsPIExternalAppLauncher
{
public:
NS_DECL_ISUPPORTS
NS_DECL_NSIEXTERNALHELPERAPPSERVICE
NS_DECL_NSPIEXTERNALAPPLAUNCHER
nsExternalHelperAppService();
virtual ~nsExternalHelperAppService();
// create an external app handler and bind it with a cookie that came from the OS specific
// helper app service subclass.
virtual nsExternalAppHandler * CreateNewExternalHandler(nsISupports * aAppCookie);
protected:
};
// An external app handler is just a small little class that presents itself as
// a nsIStreamListener. It saves the incoming data into a temp file. The handler
// is bound to an application when it is created. When it receives an OnStopRequest
// it launches the application using the temp file it has stored the data into.
// we create a handler every time we have to process data using a helper app.
// we need to read the data out of the incoming stream into a buffer which we can then use
// to write the data into the output stream representing the temp file...
#define DATA_BUFFER_SIZE (4096*2)
class nsExternalAppHandler : public nsIStreamListener
{
public:
NS_DECL_ISUPPORTS
NS_DECL_NSISTREAMLISTENER
NS_DECL_NSISTREAMOBSERVER
nsExternalAppHandler();
virtual ~nsExternalAppHandler();
// initialize the handler with a cookie that represents the external
// application associated with this handler.
virtual nsresult Init(nsISupports * aExternalApplicationCookie);
protected:
nsCOMPtr<nsIFile> mTempFile;
nsCOMPtr<nsISupports> mExternalApplication;
nsCOMPtr<nsIOutputStream> mOutStream; // output stream to the temp file...
char * mDataBuffer;
};
#endif // nsExternalHelperAppService_h__