mirror of
https://github.com/mozilla/gecko-dev.git
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434 lines
12 KiB
C++
434 lines
12 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* vim:set ts=2 sts=2 sw=2 et cin:
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*
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* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org Code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Scott MacGregor <mscott@netscape.com>
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* Dan Mosedale <dmose@mozilla.org>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nsIURI.h"
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#include "nsIURL.h"
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#include "nsExternalProtocolHandler.h"
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#include "nsXPIDLString.h"
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#include "nsReadableUtils.h"
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#include "nsCOMPtr.h"
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#include "nsIServiceManager.h"
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#include "nsServiceManagerUtils.h"
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#include "nsIInterfaceRequestor.h"
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#include "nsIInterfaceRequestorUtils.h"
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#include "nsIStringBundle.h"
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#include "nsIPrefService.h"
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#include "nsIPrompt.h"
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#include "nsNetUtil.h"
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#include "nsExternalHelperAppService.h"
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// used to dispatch urls to default protocol handlers
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#include "nsCExternalHandlerService.h"
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#include "nsIExternalProtocolService.h"
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////////////////////////////////////////////////////////////////////////
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// a stub channel implemenation which will map calls to AsyncRead and OpenInputStream
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// to calls in the OS for loading the url.
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////////////////////////////////////////////////////////////////////////
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class nsExtProtocolChannel : public nsIChannel
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{
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public:
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NS_DECL_ISUPPORTS
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NS_DECL_NSICHANNEL
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NS_DECL_NSIREQUEST
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nsExtProtocolChannel();
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virtual ~nsExtProtocolChannel();
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nsresult SetURI(nsIURI*);
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private:
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nsresult OpenURL();
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void Finish(nsresult aResult);
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nsCOMPtr<nsIURI> mUrl;
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nsCOMPtr<nsIURI> mOriginalURI;
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nsresult mStatus;
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nsLoadFlags mLoadFlags;
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PRBool mWasOpened;
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nsCOMPtr<nsIInterfaceRequestor> mCallbacks;
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nsCOMPtr<nsILoadGroup> mLoadGroup;
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};
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NS_IMPL_THREADSAFE_ADDREF(nsExtProtocolChannel)
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NS_IMPL_THREADSAFE_RELEASE(nsExtProtocolChannel)
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NS_INTERFACE_MAP_BEGIN(nsExtProtocolChannel)
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NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIChannel)
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NS_INTERFACE_MAP_ENTRY(nsIChannel)
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NS_INTERFACE_MAP_ENTRY(nsIRequest)
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NS_INTERFACE_MAP_END_THREADSAFE
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nsExtProtocolChannel::nsExtProtocolChannel() : mStatus(NS_OK),
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mWasOpened(PR_FALSE)
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{
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}
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nsExtProtocolChannel::~nsExtProtocolChannel()
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{}
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NS_IMETHODIMP nsExtProtocolChannel::GetLoadGroup(nsILoadGroup * *aLoadGroup)
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{
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NS_IF_ADDREF(*aLoadGroup = mLoadGroup);
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return NS_OK;
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}
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NS_IMETHODIMP nsExtProtocolChannel::SetLoadGroup(nsILoadGroup * aLoadGroup)
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{
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mLoadGroup = aLoadGroup;
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return NS_OK;
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}
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NS_IMETHODIMP nsExtProtocolChannel::GetNotificationCallbacks(nsIInterfaceRequestor* *aCallbacks)
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{
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NS_IF_ADDREF(*aCallbacks = mCallbacks);
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return NS_OK;
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}
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NS_IMETHODIMP nsExtProtocolChannel::SetNotificationCallbacks(nsIInterfaceRequestor* aCallbacks)
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{
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mCallbacks = aCallbacks;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsExtProtocolChannel::GetSecurityInfo(nsISupports * *aSecurityInfo)
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{
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*aSecurityInfo = nsnull;
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return NS_OK;
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}
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NS_IMETHODIMP nsExtProtocolChannel::GetOriginalURI(nsIURI* *aURI)
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{
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NS_ADDREF(*aURI = mOriginalURI);
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return NS_OK;
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}
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NS_IMETHODIMP nsExtProtocolChannel::SetOriginalURI(nsIURI* aURI)
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{
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NS_ENSURE_ARG_POINTER(aURI);
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mOriginalURI = aURI;
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return NS_OK;
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}
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NS_IMETHODIMP nsExtProtocolChannel::GetURI(nsIURI* *aURI)
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{
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*aURI = mUrl;
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NS_IF_ADDREF(*aURI);
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return NS_OK;
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}
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nsresult nsExtProtocolChannel::SetURI(nsIURI* aURI)
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{
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mUrl = aURI;
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return NS_OK;
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}
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nsresult nsExtProtocolChannel::OpenURL()
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{
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nsresult rv = NS_ERROR_FAILURE;
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nsCOMPtr<nsIExternalProtocolService> extProtService (do_GetService(NS_EXTERNALPROTOCOLSERVICE_CONTRACTID));
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if (extProtService)
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{
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#ifdef DEBUG
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nsCAutoString urlScheme;
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mUrl->GetScheme(urlScheme);
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PRBool haveHandler = PR_FALSE;
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extProtService->ExternalProtocolHandlerExists(urlScheme.get(), &haveHandler);
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NS_ASSERTION(haveHandler, "Why do we have a channel for this url if we don't support the protocol?");
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#endif
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nsCOMPtr<nsIInterfaceRequestor> aggCallbacks;
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rv = NS_NewNotificationCallbacksAggregation(mCallbacks, mLoadGroup,
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getter_AddRefs(aggCallbacks));
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if (NS_FAILED(rv)) {
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goto finish;
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}
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rv = extProtService->LoadURI(mUrl, aggCallbacks);
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if (NS_SUCCEEDED(rv)) {
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// despite success, we need to abort this channel, at the very least
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// to make it clear to the caller that no on{Start,Stop}Request
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// should be expected.
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rv = NS_ERROR_NO_CONTENT;
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}
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}
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finish:
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mCallbacks = 0;
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return rv;
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}
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NS_IMETHODIMP nsExtProtocolChannel::Open(nsIInputStream **_retval)
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{
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return OpenURL();
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}
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NS_IMETHODIMP nsExtProtocolChannel::AsyncOpen(nsIStreamListener *listener, nsISupports *ctxt)
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{
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NS_ENSURE_ARG_POINTER(listener);
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NS_ENSURE_TRUE(!mWasOpened, NS_ERROR_ALREADY_OPENED);
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mWasOpened = PR_TRUE;
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return OpenURL();
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}
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NS_IMETHODIMP nsExtProtocolChannel::GetLoadFlags(nsLoadFlags *aLoadFlags)
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{
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*aLoadFlags = mLoadFlags;
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return NS_OK;
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}
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NS_IMETHODIMP nsExtProtocolChannel::SetLoadFlags(nsLoadFlags aLoadFlags)
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{
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mLoadFlags = aLoadFlags;
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return NS_OK;
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}
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NS_IMETHODIMP nsExtProtocolChannel::GetContentType(nsACString &aContentType)
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{
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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NS_IMETHODIMP nsExtProtocolChannel::SetContentType(const nsACString &aContentType)
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{
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return NS_ERROR_FAILURE;
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}
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NS_IMETHODIMP nsExtProtocolChannel::GetContentCharset(nsACString &aContentCharset)
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{
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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NS_IMETHODIMP nsExtProtocolChannel::SetContentCharset(const nsACString &aContentCharset)
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{
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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NS_IMETHODIMP nsExtProtocolChannel::GetContentLength(PRInt32 * aContentLength)
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{
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*aContentLength = -1;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsExtProtocolChannel::SetContentLength(PRInt32 aContentLength)
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{
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NS_NOTREACHED("SetContentLength");
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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NS_IMETHODIMP nsExtProtocolChannel::GetOwner(nsISupports * *aPrincipal)
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{
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NS_NOTREACHED("GetOwner");
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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NS_IMETHODIMP nsExtProtocolChannel::SetOwner(nsISupports * aPrincipal)
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{
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NS_NOTREACHED("SetOwner");
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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////////////////////////////////////////////////////////////////////////////////
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// From nsIRequest
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////////////////////////////////////////////////////////////////////////////////
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NS_IMETHODIMP nsExtProtocolChannel::GetName(nsACString &result)
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{
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return mUrl->GetSpec(result);
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}
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NS_IMETHODIMP nsExtProtocolChannel::IsPending(PRBool *result)
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{
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*result = PR_FALSE;
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return NS_OK;
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}
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NS_IMETHODIMP nsExtProtocolChannel::GetStatus(nsresult *status)
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{
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*status = mStatus;
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return NS_OK;
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}
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NS_IMETHODIMP nsExtProtocolChannel::Cancel(nsresult status)
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{
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mStatus = status;
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return NS_OK;
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}
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NS_IMETHODIMP nsExtProtocolChannel::Suspend()
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{
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NS_NOTREACHED("Suspend");
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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NS_IMETHODIMP nsExtProtocolChannel::Resume()
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{
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NS_NOTREACHED("Resume");
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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///////////////////////////////////////////////////////////////////////
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// the default protocol handler implementation
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//////////////////////////////////////////////////////////////////////
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nsExternalProtocolHandler::nsExternalProtocolHandler()
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{
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m_schemeName = "default";
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}
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nsExternalProtocolHandler::~nsExternalProtocolHandler()
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{}
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NS_IMPL_THREADSAFE_ADDREF(nsExternalProtocolHandler)
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NS_IMPL_THREADSAFE_RELEASE(nsExternalProtocolHandler)
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NS_INTERFACE_MAP_BEGIN(nsExternalProtocolHandler)
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NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIProtocolHandler)
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NS_INTERFACE_MAP_ENTRY(nsIProtocolHandler)
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NS_INTERFACE_MAP_ENTRY(nsIExternalProtocolHandler)
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NS_INTERFACE_MAP_ENTRY(nsISupportsWeakReference)
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NS_INTERFACE_MAP_END_THREADSAFE
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NS_IMETHODIMP nsExternalProtocolHandler::GetScheme(nsACString &aScheme)
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{
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aScheme = m_schemeName;
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return NS_OK;
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}
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NS_IMETHODIMP nsExternalProtocolHandler::GetDefaultPort(PRInt32 *aDefaultPort)
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{
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*aDefaultPort = 0;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsExternalProtocolHandler::AllowPort(PRInt32 port, const char *scheme, PRBool *_retval)
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{
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// don't override anything.
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*_retval = PR_FALSE;
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return NS_OK;
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}
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// returns TRUE if the OS can handle this protocol scheme and false otherwise.
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PRBool nsExternalProtocolHandler::HaveExternalProtocolHandler(nsIURI * aURI)
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{
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PRBool haveHandler = PR_FALSE;
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if (aURI)
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{
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nsCAutoString scheme;
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aURI->GetScheme(scheme);
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if (gExtProtSvc)
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gExtProtSvc->ExternalProtocolHandlerExists(scheme.get(), &haveHandler);
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}
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return haveHandler;
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}
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NS_IMETHODIMP nsExternalProtocolHandler::GetProtocolFlags(PRUint32 *aUritype)
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{
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// Make it norelative since it is a simple uri
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*aUritype = URI_NORELATIVE | URI_NOAUTH | URI_LOADABLE_BY_ANYONE |
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URI_NON_PERSISTABLE | URI_DOES_NOT_RETURN_DATA;
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return NS_OK;
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}
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NS_IMETHODIMP nsExternalProtocolHandler::NewURI(const nsACString &aSpec,
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const char *aCharset, // ignore charset info
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nsIURI *aBaseURI,
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nsIURI **_retval)
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{
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nsresult rv;
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nsCOMPtr<nsIURI> uri = do_CreateInstance(NS_SIMPLEURI_CONTRACTID, &rv);
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NS_ENSURE_SUCCESS(rv, rv);
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rv = uri->SetSpec(aSpec);
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NS_ENSURE_SUCCESS(rv, rv);
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NS_ADDREF(*_retval = uri);
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return NS_OK;
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}
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NS_IMETHODIMP nsExternalProtocolHandler::NewChannel(nsIURI *aURI, nsIChannel **_retval)
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{
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// Only try to return a channel if we have a protocol handler for the url.
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// nsOSHelperAppService::LoadUriInternal relies on this to check trustedness
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// for some platforms at least. (win uses ::ShellExecute and unix uses
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// gnome_url_show.)
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PRBool haveExternalHandler = HaveExternalProtocolHandler(aURI);
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if (haveExternalHandler)
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{
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nsCOMPtr<nsIChannel> channel = new nsExtProtocolChannel();
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if (!channel) return NS_ERROR_OUT_OF_MEMORY;
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((nsExtProtocolChannel*) channel.get())->SetURI(aURI);
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channel->SetOriginalURI(aURI);
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if (_retval)
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{
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*_retval = channel;
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NS_IF_ADDREF(*_retval);
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return NS_OK;
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}
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}
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return NS_ERROR_UNKNOWN_PROTOCOL;
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}
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///////////////////////////////////////////////////////////////////////
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// External protocol handler interface implementation
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//////////////////////////////////////////////////////////////////////
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NS_IMETHODIMP nsExternalProtocolHandler::ExternalAppExistsForScheme(const nsACString& aScheme, PRBool *_retval)
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{
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if (gExtProtSvc)
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return gExtProtSvc->ExternalProtocolHandlerExists(
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PromiseFlatCString(aScheme).get(), _retval);
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// In case we don't have external protocol service.
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*_retval = PR_FALSE;
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return NS_OK;
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}
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