path: root/embed/mozilla/BaseProtocolContentHandler.cpp

/*
 *  Copyright (C) 2001 Philip Langdale
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2, or (at your option)
 *  any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#include "nsCOMPtr.h"
#include "nsIURI.h"
#include "nsIChannel.h"
#include "nsIStorageStream.h"
#include "nsIInputStream.h"
#include "nsIOutputStream.h"
#include "nsNetUtil.h"
#include "nsIExternalProtocolService.h"
#include "nsCExternalHandlerService.h"

#include "BaseProtocolContentHandler.h"

/* Implementation file */
NS_IMPL_ISUPPORTS2 (GBaseProtocolContentHandler, nsIProtocolHandler, nsIContentHandler)

GBaseProtocolContentHandler::GBaseProtocolContentHandler(const char *aScheme) :
              GBaseProtocolHandler(aScheme)
{
    NS_INIT_ISUPPORTS();
    /* member initializers and constructor code */
    mMimeType = NS_LITERAL_CSTRING("application-x-gnome-") + mScheme;
}

GBaseProtocolContentHandler::~GBaseProtocolContentHandler()
{
    /* destructor code */
}

/* nsIChannel newChannel (in nsIURI aURI); */
NS_IMETHODIMP GBaseProtocolContentHandler::NewChannel(nsIURI *aURI,
                              nsIChannel **_retval)
{
    nsCOMPtr<nsIStorageStream> sStream;
    nsresult rv = NS_NewStorageStream(1, 16, getter_AddRefs(sStream));
    if (NS_FAILED(rv)) return rv;

    nsCOMPtr<nsIOutputStream> oStream;
    rv = sStream->GetOutputStream(0, getter_AddRefs(oStream));

    PRUint32 bytes;
    oStream->Write("Dummy stream\0", 13, &bytes);

    nsCOMPtr<nsIInputStream> iStream;
    rv = sStream->NewInputStream(0, getter_AddRefs(iStream));
    if (NS_FAILED(rv)) return rv;

    nsCOMPtr<nsIChannel> channel;
    rv = NS_NewInputStreamChannel(getter_AddRefs(channel), aURI,
                      iStream, mMimeType, NS_LITERAL_CSTRING(""));
    if (NS_FAILED(rv)) return rv;

    NS_IF_ADDREF (*_retval = channel);
    return rv;
}

NS_IMETHODIMP GBaseProtocolContentHandler::HandleContent (
                    const char * aContentType,
                    const char * aCommand,
                    nsISupports * aWindowContext,
                    nsIRequest *aRequest)
{
    nsresult rv = NS_OK;
    if (!aRequest)
        return NS_ERROR_NULL_POINTER;
    // First of all, get the content type and make sure it is a 
    // content type we know how to handle!
    if (mMimeType.Equals(aContentType))
    {
        nsCOMPtr<nsIChannel> channel = do_QueryInterface(aRequest);
        if(!channel) return NS_ERROR_FAILURE;

        nsCOMPtr<nsIURI> uri;
        rv = channel->GetURI(getter_AddRefs(uri));
        if (NS_FAILED(rv)) return rv;

        aRequest->Cancel(NS_BINDING_ABORTED);
        if (uri)
        {
            nsCOMPtr<nsIExternalProtocolService> ps = 
                do_GetService (NS_EXTERNALPROTOCOLSERVICE_CONTRACTID, &rv);
            if (NS_FAILED(rv) || !ps) return NS_ERROR_FAILURE;
            ps->LoadUrl (uri);
        }
    }
    return rv;
}