зеркало из https://github.com/mozilla/pjs.git
976 строки
28 KiB
C++
976 строки
28 KiB
C++
/* ***** 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.
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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) 2002
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Darin Fisher <darin@netscape.com> (original author)
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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 the GNU General Public License Version 2 or later (the "GPL"), or
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* 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 "nsPrefetchService.h"
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#include "nsICacheSession.h"
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#include "nsICacheService.h"
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#include "nsIServiceManager.h"
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#include "nsICategoryManager.h"
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#include "nsIObserverService.h"
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#include "nsIPrefService.h"
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#include "nsIPrefBranch2.h"
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#include "nsIDocCharset.h"
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#include "nsIWebProgress.h"
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#include "nsCURILoader.h"
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#include "nsICachingChannel.h"
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#include "nsICacheVisitor.h"
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#include "nsIHttpChannel.h"
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#include "nsIURL.h"
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#include "nsISimpleEnumerator.h"
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#include "nsNetUtil.h"
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#include "nsString.h"
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#include "nsXPIDLString.h"
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#include "nsReadableUtils.h"
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#include "nsStreamUtils.h"
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#include "nsAutoPtr.h"
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#include "prtime.h"
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#include "prlog.h"
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#include "plstr.h"
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#include "nsIAsyncVerifyRedirectCallback.h"
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#if defined(PR_LOGGING)
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//
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// To enable logging (see prlog.h for full details):
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//
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// set NSPR_LOG_MODULES=nsPrefetch:5
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// set NSPR_LOG_FILE=prefetch.log
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//
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// this enables PR_LOG_ALWAYS level information and places all output in
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// the file http.log
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//
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static PRLogModuleInfo *gPrefetchLog;
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#endif
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#define LOG(args) PR_LOG(gPrefetchLog, 4, args)
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#define LOG_ENABLED() PR_LOG_TEST(gPrefetchLog, 4)
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#define PREFETCH_PREF "network.prefetch-next"
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//-----------------------------------------------------------------------------
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// helpers
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//-----------------------------------------------------------------------------
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static inline PRUint32
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PRTimeToSeconds(PRTime t_usec)
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{
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PRTime usec_per_sec;
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PRUint32 t_sec;
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LL_I2L(usec_per_sec, PR_USEC_PER_SEC);
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LL_DIV(t_usec, t_usec, usec_per_sec);
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LL_L2I(t_sec, t_usec);
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return t_sec;
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}
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#define NowInSeconds() PRTimeToSeconds(PR_Now())
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//-----------------------------------------------------------------------------
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// nsPrefetchQueueEnumerator
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//-----------------------------------------------------------------------------
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class nsPrefetchQueueEnumerator : public nsISimpleEnumerator
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{
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public:
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NS_DECL_ISUPPORTS
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NS_DECL_NSISIMPLEENUMERATOR
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nsPrefetchQueueEnumerator(nsPrefetchService *aService);
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~nsPrefetchQueueEnumerator();
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private:
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void Increment();
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nsRefPtr<nsPrefetchService> mService;
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nsRefPtr<nsPrefetchNode> mCurrent;
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PRBool mStarted;
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};
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//-----------------------------------------------------------------------------
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// nsPrefetchQueueEnumerator <public>
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//-----------------------------------------------------------------------------
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nsPrefetchQueueEnumerator::nsPrefetchQueueEnumerator(nsPrefetchService *aService)
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: mService(aService)
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, mStarted(PR_FALSE)
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{
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Increment();
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}
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nsPrefetchQueueEnumerator::~nsPrefetchQueueEnumerator()
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{
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}
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//-----------------------------------------------------------------------------
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// nsPrefetchQueueEnumerator::nsISimpleEnumerator
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//-----------------------------------------------------------------------------
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NS_IMETHODIMP
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nsPrefetchQueueEnumerator::HasMoreElements(PRBool *aHasMore)
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{
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*aHasMore = (mCurrent != nsnull);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsPrefetchQueueEnumerator::GetNext(nsISupports **aItem)
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{
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if (!mCurrent) return NS_ERROR_FAILURE;
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NS_ADDREF(*aItem = static_cast<nsIDOMLoadStatus*>(mCurrent.get()));
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Increment();
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return NS_OK;
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}
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//-----------------------------------------------------------------------------
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// nsPrefetchQueueEnumerator <private>
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//-----------------------------------------------------------------------------
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void
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nsPrefetchQueueEnumerator::Increment()
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{
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if (!mStarted) {
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// If the service is currently serving a request, it won't be in
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// the pending queue, so we return it first. If it isn't, we'll
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// just start with the pending queue.
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mStarted = PR_TRUE;
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mCurrent = mService->GetCurrentNode();
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if (!mCurrent)
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mCurrent = mService->GetQueueHead();
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return;
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}
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if (mCurrent) {
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if (mCurrent == mService->GetCurrentNode()) {
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// If we just returned the node being processed by the service,
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// start with the pending queue
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mCurrent = mService->GetQueueHead();
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}
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else {
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// Otherwise just advance to the next item in the queue
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mCurrent = mCurrent->mNext;
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}
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}
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}
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//-----------------------------------------------------------------------------
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// nsPrefetchQueueEnumerator::nsISupports
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//-----------------------------------------------------------------------------
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NS_IMPL_ISUPPORTS1(nsPrefetchQueueEnumerator, nsISimpleEnumerator)
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//-----------------------------------------------------------------------------
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// nsPrefetchNode <public>
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//-----------------------------------------------------------------------------
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nsPrefetchNode::nsPrefetchNode(nsPrefetchService *aService,
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nsIURI *aURI,
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nsIURI *aReferrerURI,
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nsIDOMNode *aSource)
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: mNext(nsnull)
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, mURI(aURI)
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, mReferrerURI(aReferrerURI)
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, mService(aService)
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, mChannel(nsnull)
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, mState(nsIDOMLoadStatus::UNINITIALIZED)
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, mBytesRead(0)
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{
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mSource = do_GetWeakReference(aSource);
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}
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nsresult
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nsPrefetchNode::OpenChannel()
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{
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nsresult rv = NS_NewChannel(getter_AddRefs(mChannel),
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mURI,
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nsnull, nsnull, this,
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nsIRequest::LOAD_BACKGROUND |
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nsICachingChannel::LOAD_ONLY_IF_MODIFIED);
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NS_ENSURE_SUCCESS(rv, rv);
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// configure HTTP specific stuff
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nsCOMPtr<nsIHttpChannel> httpChannel =
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do_QueryInterface(mChannel);
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if (httpChannel) {
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httpChannel->SetReferrer(mReferrerURI);
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httpChannel->SetRequestHeader(
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NS_LITERAL_CSTRING("X-Moz"),
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NS_LITERAL_CSTRING("prefetch"),
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PR_FALSE);
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}
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rv = mChannel->AsyncOpen(this, nsnull);
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NS_ENSURE_SUCCESS(rv, rv);
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mState = nsIDOMLoadStatus::REQUESTED;
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return NS_OK;
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}
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nsresult
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nsPrefetchNode::CancelChannel(nsresult error)
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{
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mChannel->Cancel(error);
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mChannel = nsnull;
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mState = nsIDOMLoadStatus::UNINITIALIZED;
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return NS_OK;
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}
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//-----------------------------------------------------------------------------
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// nsPrefetchNode::nsISupports
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//-----------------------------------------------------------------------------
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NS_IMPL_ISUPPORTS5(nsPrefetchNode,
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nsIDOMLoadStatus,
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nsIRequestObserver,
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nsIStreamListener,
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nsIInterfaceRequestor,
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nsIChannelEventSink)
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//-----------------------------------------------------------------------------
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// nsPrefetchNode::nsIStreamListener
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//-----------------------------------------------------------------------------
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NS_IMETHODIMP
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nsPrefetchNode::OnStartRequest(nsIRequest *aRequest,
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nsISupports *aContext)
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{
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nsresult rv;
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nsCOMPtr<nsICachingChannel> cachingChannel =
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do_QueryInterface(aRequest, &rv);
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if (NS_FAILED(rv)) return rv;
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// no need to prefetch a document that is already in the cache
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PRBool fromCache;
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if (NS_SUCCEEDED(cachingChannel->IsFromCache(&fromCache)) &&
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fromCache) {
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LOG(("document is already in the cache; canceling prefetch\n"));
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return NS_BINDING_ABORTED;
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}
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//
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// no need to prefetch a document that must be requested fresh each
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// and every time.
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//
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nsCOMPtr<nsISupports> cacheToken;
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cachingChannel->GetCacheToken(getter_AddRefs(cacheToken));
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if (!cacheToken)
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return NS_ERROR_ABORT; // bail, no cache entry
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nsCOMPtr<nsICacheEntryInfo> entryInfo =
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do_QueryInterface(cacheToken, &rv);
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if (NS_FAILED(rv)) return rv;
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PRUint32 expTime;
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if (NS_SUCCEEDED(entryInfo->GetExpirationTime(&expTime))) {
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if (NowInSeconds() >= expTime) {
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LOG(("document cannot be reused from cache; "
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"canceling prefetch\n"));
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return NS_BINDING_ABORTED;
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}
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}
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mState = nsIDOMLoadStatus::RECEIVING;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsPrefetchNode::OnDataAvailable(nsIRequest *aRequest,
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nsISupports *aContext,
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nsIInputStream *aStream,
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PRUint32 aOffset,
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PRUint32 aCount)
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{
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PRUint32 bytesRead = 0;
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aStream->ReadSegments(NS_DiscardSegment, nsnull, aCount, &bytesRead);
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mBytesRead += bytesRead;
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LOG(("prefetched %u bytes [offset=%u]\n", bytesRead, aOffset));
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return NS_OK;
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}
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NS_IMETHODIMP
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nsPrefetchNode::OnStopRequest(nsIRequest *aRequest,
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nsISupports *aContext,
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nsresult aStatus)
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{
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LOG(("done prefetching [status=%x]\n", aStatus));
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mState = nsIDOMLoadStatus::LOADED;
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if (mBytesRead == 0 && aStatus == NS_OK) {
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// we didn't need to read (because LOAD_ONLY_IF_MODIFIED was
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// specified), but the object should report loadedSize as if it
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// did.
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mChannel->GetContentLength(&mBytesRead);
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}
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mService->NotifyLoadCompleted(this);
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mService->ProcessNextURI();
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return NS_OK;
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}
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//-----------------------------------------------------------------------------
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// nsPrefetchNode::nsIInterfaceRequestor
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//-----------------------------------------------------------------------------
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NS_IMETHODIMP
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nsPrefetchNode::GetInterface(const nsIID &aIID, void **aResult)
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{
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if (aIID.Equals(NS_GET_IID(nsIChannelEventSink))) {
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NS_ADDREF_THIS();
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*aResult = static_cast<nsIChannelEventSink *>(this);
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return NS_OK;
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}
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return NS_ERROR_NO_INTERFACE;
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}
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//-----------------------------------------------------------------------------
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// nsPrefetchNode::nsIChannelEventSink
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//-----------------------------------------------------------------------------
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NS_IMETHODIMP
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nsPrefetchNode::AsyncOnChannelRedirect(nsIChannel *aOldChannel,
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nsIChannel *aNewChannel,
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PRUint32 aFlags,
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nsIAsyncVerifyRedirectCallback *callback)
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{
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nsCOMPtr<nsIURI> newURI;
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nsresult rv = aNewChannel->GetURI(getter_AddRefs(newURI));
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if (NS_FAILED(rv))
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return rv;
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nsCOMPtr<nsICachingChannel> oldCachingChannel =
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do_QueryInterface(aOldChannel);
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PRBool match;
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rv = newURI->SchemeIs("http", &match);
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if (NS_FAILED(rv) || !match) {
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rv = newURI->SchemeIs("https", &match);
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if (NS_FAILED(rv) || !match) {
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LOG(("rejected: URL is not of type http/https\n"));
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return NS_ERROR_ABORT;
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}
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}
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// HTTP request headers are not automatically forwarded to the new channel.
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nsCOMPtr<nsIHttpChannel> httpChannel = do_QueryInterface(aNewChannel);
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NS_ENSURE_STATE(httpChannel);
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httpChannel->SetRequestHeader(NS_LITERAL_CSTRING("X-Moz"),
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NS_LITERAL_CSTRING("prefetch"),
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PR_FALSE);
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mChannel = aNewChannel;
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callback->OnRedirectVerifyCallback(NS_OK);
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return NS_OK;
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}
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//-----------------------------------------------------------------------------
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// nsPrefetchService <public>
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//-----------------------------------------------------------------------------
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nsPrefetchService::nsPrefetchService()
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: mQueueHead(nsnull)
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, mQueueTail(nsnull)
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, mStopCount(0)
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, mHaveProcessed(PR_FALSE)
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, mDisabled(PR_TRUE)
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{
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}
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nsPrefetchService::~nsPrefetchService()
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{
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// cannot reach destructor if prefetch in progress (listener owns reference
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// to this service)
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EmptyQueue();
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}
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nsresult
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nsPrefetchService::Init()
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{
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#if defined(PR_LOGGING)
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if (!gPrefetchLog)
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gPrefetchLog = PR_NewLogModule("nsPrefetch");
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#endif
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nsresult rv;
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// read prefs and hook up pref observer
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nsCOMPtr<nsIPrefBranch2> prefs(do_GetService(NS_PREFSERVICE_CONTRACTID, &rv));
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if (NS_SUCCEEDED(rv)) {
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PRBool enabled;
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rv = prefs->GetBoolPref(PREFETCH_PREF, &enabled);
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if (NS_SUCCEEDED(rv) && enabled)
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mDisabled = PR_FALSE;
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prefs->AddObserver(PREFETCH_PREF, this, PR_TRUE);
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}
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// Observe xpcom-shutdown event
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nsCOMPtr<nsIObserverService> observerService =
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mozilla::services::GetObserverService();
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if (!observerService)
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return NS_ERROR_FAILURE;
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rv = observerService->AddObserver(this, NS_XPCOM_SHUTDOWN_OBSERVER_ID, PR_TRUE);
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NS_ENSURE_SUCCESS(rv, rv);
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if (!mDisabled)
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AddProgressListener();
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return NS_OK;
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}
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void
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nsPrefetchService::ProcessNextURI()
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{
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nsresult rv;
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nsCOMPtr<nsIURI> uri, referrer;
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mCurrentNode = nsnull;
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do {
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rv = DequeueNode(getter_AddRefs(mCurrentNode));
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if (NS_FAILED(rv)) break;
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#if defined(PR_LOGGING)
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if (LOG_ENABLED()) {
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nsCAutoString spec;
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mCurrentNode->mURI->GetSpec(spec);
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LOG(("ProcessNextURI [%s]\n", spec.get()));
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}
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#endif
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//
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// if opening the channel fails, then just skip to the next uri
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//
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rv = mCurrentNode->OpenChannel();
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}
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while (NS_FAILED(rv));
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}
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void
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nsPrefetchService::NotifyLoadRequested(nsPrefetchNode *node)
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{
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nsCOMPtr<nsIObserverService> observerService =
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mozilla::services::GetObserverService();
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if (!observerService)
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return;
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observerService->NotifyObservers(static_cast<nsIDOMLoadStatus*>(node),
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"prefetch-load-requested", nsnull);
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}
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void
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nsPrefetchService::NotifyLoadCompleted(nsPrefetchNode *node)
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{
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nsCOMPtr<nsIObserverService> observerService =
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mozilla::services::GetObserverService();
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if (!observerService)
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return;
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observerService->NotifyObservers(static_cast<nsIDOMLoadStatus*>(node),
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"prefetch-load-completed", nsnull);
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}
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//-----------------------------------------------------------------------------
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// nsPrefetchService <private>
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//-----------------------------------------------------------------------------
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void
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nsPrefetchService::AddProgressListener()
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{
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// Register as an observer for the document loader
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nsCOMPtr<nsIWebProgress> progress =
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do_GetService(NS_DOCUMENTLOADER_SERVICE_CONTRACTID);
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if (progress)
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progress->AddProgressListener(this, nsIWebProgress::NOTIFY_STATE_DOCUMENT);
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}
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|
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void
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nsPrefetchService::RemoveProgressListener()
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{
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// Register as an observer for the document loader
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nsCOMPtr<nsIWebProgress> progress =
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do_GetService(NS_DOCUMENTLOADER_SERVICE_CONTRACTID);
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if (progress)
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progress->RemoveProgressListener(this);
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}
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nsresult
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nsPrefetchService::EnqueueNode(nsPrefetchNode *aNode)
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{
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NS_ADDREF(aNode);
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if (!mQueueTail) {
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mQueueHead = aNode;
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mQueueTail = aNode;
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}
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else {
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mQueueTail->mNext = aNode;
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mQueueTail = aNode;
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}
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return NS_OK;
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|
}
|
|
|
|
nsresult
|
|
nsPrefetchService::EnqueueURI(nsIURI *aURI,
|
|
nsIURI *aReferrerURI,
|
|
nsIDOMNode *aSource,
|
|
nsPrefetchNode **aNode)
|
|
{
|
|
nsPrefetchNode *node = new nsPrefetchNode(this, aURI, aReferrerURI,
|
|
aSource);
|
|
if (!node)
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
|
|
NS_ADDREF(*aNode = node);
|
|
|
|
return EnqueueNode(node);
|
|
}
|
|
|
|
nsresult
|
|
nsPrefetchService::DequeueNode(nsPrefetchNode **node)
|
|
{
|
|
if (!mQueueHead)
|
|
return NS_ERROR_NOT_AVAILABLE;
|
|
|
|
// give the ref to the caller
|
|
*node = mQueueHead;
|
|
mQueueHead = mQueueHead->mNext;
|
|
(*node)->mNext = nsnull;
|
|
|
|
if (!mQueueHead)
|
|
mQueueTail = nsnull;
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
void
|
|
nsPrefetchService::EmptyQueue()
|
|
{
|
|
do {
|
|
nsRefPtr<nsPrefetchNode> node;
|
|
DequeueNode(getter_AddRefs(node));
|
|
} while (mQueueHead);
|
|
}
|
|
|
|
void
|
|
nsPrefetchService::StartPrefetching()
|
|
{
|
|
//
|
|
// at initialization time we might miss the first DOCUMENT START
|
|
// notification, so we have to be careful to avoid letting our
|
|
// stop count go negative.
|
|
//
|
|
if (mStopCount > 0)
|
|
mStopCount--;
|
|
|
|
LOG(("StartPrefetching [stopcount=%d]\n", mStopCount));
|
|
|
|
// only start prefetching after we've received enough DOCUMENT
|
|
// STOP notifications. we do this inorder to defer prefetching
|
|
// until after all sub-frames have finished loading.
|
|
if (mStopCount == 0 && !mCurrentNode) {
|
|
mHaveProcessed = PR_TRUE;
|
|
ProcessNextURI();
|
|
}
|
|
}
|
|
|
|
void
|
|
nsPrefetchService::StopPrefetching()
|
|
{
|
|
mStopCount++;
|
|
|
|
LOG(("StopPrefetching [stopcount=%d]\n", mStopCount));
|
|
|
|
// only kill the prefetch queue if we've actually started prefetching.
|
|
if (!mCurrentNode)
|
|
return;
|
|
|
|
mCurrentNode->CancelChannel(NS_BINDING_ABORTED);
|
|
mCurrentNode = nsnull;
|
|
EmptyQueue();
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// nsPrefetchService::nsISupports
|
|
//-----------------------------------------------------------------------------
|
|
|
|
NS_IMPL_ISUPPORTS4(nsPrefetchService,
|
|
nsIPrefetchService,
|
|
nsIWebProgressListener,
|
|
nsIObserver,
|
|
nsISupportsWeakReference)
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// nsPrefetchService::nsIPrefetchService
|
|
//-----------------------------------------------------------------------------
|
|
|
|
nsresult
|
|
nsPrefetchService::Prefetch(nsIURI *aURI,
|
|
nsIURI *aReferrerURI,
|
|
nsIDOMNode *aSource,
|
|
PRBool aExplicit)
|
|
{
|
|
nsresult rv;
|
|
|
|
NS_ENSURE_ARG_POINTER(aURI);
|
|
NS_ENSURE_ARG_POINTER(aReferrerURI);
|
|
|
|
#if defined(PR_LOGGING)
|
|
if (LOG_ENABLED()) {
|
|
nsCAutoString spec;
|
|
aURI->GetSpec(spec);
|
|
LOG(("PrefetchURI [%s]\n", spec.get()));
|
|
}
|
|
#endif
|
|
|
|
if (mDisabled) {
|
|
LOG(("rejected: prefetch service is disabled\n"));
|
|
return NS_ERROR_ABORT;
|
|
}
|
|
|
|
//
|
|
// XXX we should really be asking the protocol handler if it supports
|
|
// caching, so we can determine if there is any value to prefetching.
|
|
// for now, we'll only prefetch http links since we know that's the
|
|
// most common case. ignore https links since https content only goes
|
|
// into the memory cache.
|
|
//
|
|
// XXX we might want to either leverage nsIProtocolHandler::protocolFlags
|
|
// or possibly nsIRequest::loadFlags to determine if this URI should be
|
|
// prefetched.
|
|
//
|
|
PRBool match;
|
|
rv = aURI->SchemeIs("http", &match);
|
|
if (NS_FAILED(rv) || !match) {
|
|
rv = aURI->SchemeIs("https", &match);
|
|
if (NS_FAILED(rv) || !match) {
|
|
LOG(("rejected: URL is not of type http/https\n"));
|
|
return NS_ERROR_ABORT;
|
|
}
|
|
}
|
|
|
|
//
|
|
// the referrer URI must be http:
|
|
//
|
|
rv = aReferrerURI->SchemeIs("http", &match);
|
|
if (NS_FAILED(rv) || !match) {
|
|
rv = aReferrerURI->SchemeIs("https", &match);
|
|
if (NS_FAILED(rv) || !match) {
|
|
LOG(("rejected: referrer URL is neither http nor https\n"));
|
|
return NS_ERROR_ABORT;
|
|
}
|
|
}
|
|
|
|
// skip URLs that contain query strings, except URLs for which prefetching
|
|
// has been explicitly requested.
|
|
if (!aExplicit) {
|
|
nsCOMPtr<nsIURL> url(do_QueryInterface(aURI, &rv));
|
|
if (NS_FAILED(rv)) return rv;
|
|
nsCAutoString query;
|
|
rv = url->GetQuery(query);
|
|
if (NS_FAILED(rv) || !query.IsEmpty()) {
|
|
LOG(("rejected: URL has a query string\n"));
|
|
return NS_ERROR_ABORT;
|
|
}
|
|
}
|
|
|
|
//
|
|
// cancel if being prefetched
|
|
//
|
|
if (mCurrentNode) {
|
|
PRBool equals;
|
|
if (NS_SUCCEEDED(mCurrentNode->mURI->Equals(aURI, &equals)) && equals) {
|
|
LOG(("rejected: URL is already being prefetched\n"));
|
|
return NS_ERROR_ABORT;
|
|
}
|
|
}
|
|
|
|
//
|
|
// cancel if already on the prefetch queue
|
|
//
|
|
nsPrefetchNode *node = mQueueHead;
|
|
for (; node; node = node->mNext) {
|
|
PRBool equals;
|
|
if (NS_SUCCEEDED(node->mURI->Equals(aURI, &equals)) && equals) {
|
|
LOG(("rejected: URL is already on prefetch queue\n"));
|
|
return NS_ERROR_ABORT;
|
|
}
|
|
}
|
|
|
|
nsRefPtr<nsPrefetchNode> enqueuedNode;
|
|
rv = EnqueueURI(aURI, aReferrerURI, aSource,
|
|
getter_AddRefs(enqueuedNode));
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
NotifyLoadRequested(enqueuedNode);
|
|
|
|
// if there are no pages loading, kick off the request immediately
|
|
if (mStopCount == 0 && mHaveProcessed)
|
|
ProcessNextURI();
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPrefetchService::PrefetchURI(nsIURI *aURI,
|
|
nsIURI *aReferrerURI,
|
|
nsIDOMNode *aSource,
|
|
PRBool aExplicit)
|
|
{
|
|
return Prefetch(aURI, aReferrerURI, aSource, aExplicit);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPrefetchService::PrefetchURIForOfflineUse(nsIURI *aURI,
|
|
nsIURI *aReferrerURI,
|
|
nsIDOMNode *aSource,
|
|
PRBool aExplicit)
|
|
{
|
|
return NS_ERROR_NOT_IMPLEMENTED;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPrefetchService::EnumerateQueue(PRBool aIncludeNormalItems,
|
|
PRBool aIncludeOfflineItems,
|
|
nsISimpleEnumerator **aEnumerator)
|
|
{
|
|
NS_ENSURE_TRUE(aIncludeNormalItems && !aIncludeOfflineItems,
|
|
NS_ERROR_NOT_IMPLEMENTED);
|
|
|
|
*aEnumerator = new nsPrefetchQueueEnumerator(this);
|
|
if (!*aEnumerator) return NS_ERROR_OUT_OF_MEMORY;
|
|
|
|
NS_ADDREF(*aEnumerator);
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// nsPrefetchNode::nsIDOMLoadStatus
|
|
//-----------------------------------------------------------------------------
|
|
NS_IMETHODIMP
|
|
nsPrefetchNode::GetSource(nsIDOMNode **aSource)
|
|
{
|
|
*aSource = nsnull;
|
|
nsCOMPtr<nsIDOMNode> source = do_QueryReferent(mSource);
|
|
if (source)
|
|
source.swap(*aSource);
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPrefetchNode::GetUri(nsAString &aURI)
|
|
{
|
|
nsCAutoString spec;
|
|
nsresult rv = mURI->GetSpec(spec);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
CopyUTF8toUTF16(spec, aURI);
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPrefetchNode::GetTotalSize(PRInt32 *aTotalSize)
|
|
{
|
|
if (mChannel) {
|
|
return mChannel->GetContentLength(aTotalSize);
|
|
}
|
|
|
|
*aTotalSize = -1;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPrefetchNode::GetLoadedSize(PRInt32 *aLoadedSize)
|
|
{
|
|
*aLoadedSize = mBytesRead;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPrefetchNode::GetReadyState(PRUint16 *aReadyState)
|
|
{
|
|
*aReadyState = mState;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPrefetchNode::GetStatus(PRUint16 *aStatus)
|
|
{
|
|
if (!mChannel) {
|
|
*aStatus = 0;
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult rv;
|
|
nsCOMPtr<nsIHttpChannel> httpChannel = do_QueryInterface(mChannel, &rv);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
PRUint32 httpStatus;
|
|
rv = httpChannel->GetResponseStatus(&httpStatus);
|
|
if (rv == NS_ERROR_NOT_AVAILABLE) {
|
|
// Someone's calling this before we got a response... Check our
|
|
// ReadyState. If we're at RECEIVING or LOADED, then this means the
|
|
// connection errored before we got any data; return a somewhat
|
|
// sensible error code in that case.
|
|
if (mState >= nsIDOMLoadStatus::RECEIVING) {
|
|
*aStatus = NS_ERROR_NOT_AVAILABLE;
|
|
return NS_OK;
|
|
}
|
|
|
|
*aStatus = 0;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
*aStatus = PRUint16(httpStatus);
|
|
return NS_OK;
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// nsPrefetchService::nsIWebProgressListener
|
|
//-----------------------------------------------------------------------------
|
|
|
|
NS_IMETHODIMP
|
|
nsPrefetchService::OnProgressChange(nsIWebProgress *aProgress,
|
|
nsIRequest *aRequest,
|
|
PRInt32 curSelfProgress,
|
|
PRInt32 maxSelfProgress,
|
|
PRInt32 curTotalProgress,
|
|
PRInt32 maxTotalProgress)
|
|
{
|
|
NS_NOTREACHED("notification excluded in AddProgressListener(...)");
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPrefetchService::OnStateChange(nsIWebProgress* aWebProgress,
|
|
nsIRequest *aRequest,
|
|
PRUint32 progressStateFlags,
|
|
nsresult aStatus)
|
|
{
|
|
if (progressStateFlags & STATE_IS_DOCUMENT) {
|
|
if (progressStateFlags & STATE_STOP)
|
|
StartPrefetching();
|
|
else if (progressStateFlags & STATE_START)
|
|
StopPrefetching();
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
|
|
NS_IMETHODIMP
|
|
nsPrefetchService::OnLocationChange(nsIWebProgress* aWebProgress,
|
|
nsIRequest* aRequest,
|
|
nsIURI *location)
|
|
{
|
|
NS_NOTREACHED("notification excluded in AddProgressListener(...)");
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPrefetchService::OnStatusChange(nsIWebProgress* aWebProgress,
|
|
nsIRequest* aRequest,
|
|
nsresult aStatus,
|
|
const PRUnichar* aMessage)
|
|
{
|
|
NS_NOTREACHED("notification excluded in AddProgressListener(...)");
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsPrefetchService::OnSecurityChange(nsIWebProgress *aWebProgress,
|
|
nsIRequest *aRequest,
|
|
PRUint32 state)
|
|
{
|
|
NS_NOTREACHED("notification excluded in AddProgressListener(...)");
|
|
return NS_OK;
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// nsPrefetchService::nsIObserver
|
|
//-----------------------------------------------------------------------------
|
|
|
|
NS_IMETHODIMP
|
|
nsPrefetchService::Observe(nsISupports *aSubject,
|
|
const char *aTopic,
|
|
const PRUnichar *aData)
|
|
{
|
|
LOG(("nsPrefetchService::Observe [topic=%s]\n", aTopic));
|
|
|
|
if (!strcmp(aTopic, NS_XPCOM_SHUTDOWN_OBSERVER_ID)) {
|
|
StopPrefetching();
|
|
EmptyQueue();
|
|
mDisabled = PR_TRUE;
|
|
}
|
|
else if (!strcmp(aTopic, NS_PREFBRANCH_PREFCHANGE_TOPIC_ID)) {
|
|
nsCOMPtr<nsIPrefBranch> prefs(do_QueryInterface(aSubject));
|
|
PRBool enabled;
|
|
nsresult rv = prefs->GetBoolPref(PREFETCH_PREF, &enabled);
|
|
if (NS_SUCCEEDED(rv) && enabled) {
|
|
if (mDisabled) {
|
|
LOG(("enabling prefetching\n"));
|
|
mDisabled = PR_FALSE;
|
|
AddProgressListener();
|
|
}
|
|
}
|
|
else {
|
|
if (!mDisabled) {
|
|
LOG(("disabling prefetching\n"));
|
|
StopPrefetching();
|
|
EmptyQueue();
|
|
mDisabled = PR_TRUE;
|
|
RemoveProgressListener();
|
|
}
|
|
}
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
// vim: ts=4 sw=4 expandtab
|