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gecko/uriloader/prefetch/nsOfflineCacheUpdate.cpp

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/* -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** 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 Corporation
* Portions created by the Initial Developer are Copyright (C) 2007
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Dave Camp <dcamp@mozilla.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either 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
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsOfflineCacheUpdate.h"
#include "nsCPrefetchService.h"
#include "nsCURILoader.h"
#include "nsICache.h"
#include "nsICacheService.h"
#include "nsICacheSession.h"
#include "nsICachingChannel.h"
#include "nsIDOMWindow.h"
#include "nsIObserverService.h"
#include "nsIOfflineCacheSession.h"
#include "nsIWebProgress.h"
#include "nsNetCID.h"
#include "nsNetUtil.h"
#include "nsServiceManagerUtils.h"
#include "nsStreamUtils.h"
#include "nsThreadUtils.h"
#include "prlog.h"
static nsOfflineCacheUpdateService *gOfflineCacheUpdateService = nsnull;
#if defined(PR_LOGGING)
//
// To enable logging (see prlog.h for full details):
//
// set NSPR_LOG_MODULES=nsOfflineCacheUpdate:5
// set NSPR_LOG_FILE=offlineupdate.log
//
// this enables PR_LOG_ALWAYS level information and places all output in
// the file offlineupdate.log
//
static PRLogModuleInfo *gOfflineCacheUpdateLog;
#endif
#define LOG(args) PR_LOG(gOfflineCacheUpdateLog, 4, args)
#define LOG_ENABLED() PR_LOG_TEST(gOfflineCacheUpdateLog, 4)
class AutoFreeArray {
public:
AutoFreeArray(PRUint32 count, char **values)
: mCount(count), mValues(values) {};
~AutoFreeArray() { NS_FREE_XPCOM_ALLOCATED_POINTER_ARRAY(mCount, mValues); }
private:
PRUint32 mCount;
char **mValues;
};
//-----------------------------------------------------------------------------
// nsOfflineCacheUpdateItem::nsISupports
//-----------------------------------------------------------------------------
NS_IMPL_ISUPPORTS6(nsOfflineCacheUpdateItem,
nsIDOMLoadStatus,
nsIRequestObserver,
nsIStreamListener,
nsIRunnable,
nsIInterfaceRequestor,
nsIChannelEventSink)
//-----------------------------------------------------------------------------
// nsOfflineCacheUpdateItem <public>
//-----------------------------------------------------------------------------
nsOfflineCacheUpdateItem::nsOfflineCacheUpdateItem(nsOfflineCacheUpdate *aUpdate,
nsIURI *aURI,
nsIURI *aReferrerURI,
nsIDOMNode *aSource,
const nsACString &aClientID)
: mURI(aURI)
, mReferrerURI(aReferrerURI)
, mClientID(aClientID)
, mUpdate(aUpdate)
, mChannel(nsnull)
, mState(nsIDOMLoadStatus::UNINITIALIZED)
, mBytesRead(0)
{
mSource = do_GetWeakReference(aSource);
}
nsOfflineCacheUpdateItem::~nsOfflineCacheUpdateItem()
{
}
nsresult
nsOfflineCacheUpdateItem::OpenChannel()
{
nsresult rv = NS_NewChannel(getter_AddRefs(mChannel),
mURI,
nsnull, nsnull, this,
nsIRequest::LOAD_BACKGROUND |
nsICachingChannel::LOAD_ONLY_IF_MODIFIED);
NS_ENSURE_SUCCESS(rv, rv);
// configure HTTP specific stuff
nsCOMPtr<nsIHttpChannel> httpChannel =
do_QueryInterface(mChannel);
if (httpChannel) {
httpChannel->SetReferrer(mReferrerURI);
httpChannel->SetRequestHeader(NS_LITERAL_CSTRING("X-Moz"),
NS_LITERAL_CSTRING("offline-resource"),
PR_FALSE);
}
nsCOMPtr<nsICachingChannel> cachingChannel =
do_QueryInterface(mChannel);
if (cachingChannel) {
rv = cachingChannel->SetCacheForOfflineUse(PR_TRUE);
NS_ENSURE_SUCCESS(rv, rv);
if (!mClientID.IsEmpty()) {
rv = cachingChannel->SetOfflineCacheClientID(mClientID);
NS_ENSURE_SUCCESS(rv, rv);
}
}
rv = mChannel->AsyncOpen(this, nsnull);
NS_ENSURE_SUCCESS(rv, rv);
mState = nsIDOMLoadStatus::REQUESTED;
return NS_OK;
}
nsresult
nsOfflineCacheUpdateItem::Cancel()
{
if (mChannel) {
mChannel->Cancel(NS_ERROR_ABORT);
mChannel = nsnull;
}
mState = nsIDOMLoadStatus::UNINITIALIZED;
return NS_OK;
}
//-----------------------------------------------------------------------------
// nsOfflineCacheUpdateItem::nsIStreamListener
//-----------------------------------------------------------------------------
NS_IMETHODIMP
nsOfflineCacheUpdateItem::OnStartRequest(nsIRequest *aRequest,
nsISupports *aContext)
{
mState = nsIDOMLoadStatus::RECEIVING;
return NS_OK;
}
NS_IMETHODIMP
nsOfflineCacheUpdateItem::OnDataAvailable(nsIRequest *aRequest,
nsISupports *aContext,
nsIInputStream *aStream,
PRUint32 aOffset,
PRUint32 aCount)
{
PRUint32 bytesRead = 0;
aStream->ReadSegments(NS_DiscardSegment, nsnull, aCount, &bytesRead);
mBytesRead += bytesRead;
LOG(("loaded %u bytes into offline cache [offset=%u]\n",
bytesRead, aOffset));
return NS_OK;
}
NS_IMETHODIMP
nsOfflineCacheUpdateItem::OnStopRequest(nsIRequest *aRequest,
nsISupports *aContext,
nsresult aStatus)
{
LOG(("done fetching offline item [status=%x]\n", aStatus));
mState = nsIDOMLoadStatus::LOADED;
if (mBytesRead == 0 && aStatus == NS_OK) {
// we didn't need to read (because LOAD_ONLY_IF_MODIFIED was
// specified), but the object should report loadedSize as if it
// did.
mChannel->GetContentLength(&mBytesRead);
}
// We need to notify the update that the load is complete, but we
// want to give the channel a chance to close the cache entries.
NS_DispatchToCurrentThread(this);
return NS_OK;
}
//-----------------------------------------------------------------------------
// nsOfflineCacheUpdateItem::nsIRunnable
//-----------------------------------------------------------------------------
NS_IMETHODIMP
nsOfflineCacheUpdateItem::Run()
{
mUpdate->LoadCompleted();
return NS_OK;
}
//-----------------------------------------------------------------------------
// nsOfflineCacheUpdateItem::nsIInterfaceRequestor
//-----------------------------------------------------------------------------
NS_IMETHODIMP
nsOfflineCacheUpdateItem::GetInterface(const nsIID &aIID, void **aResult)
{
if (aIID.Equals(NS_GET_IID(nsIChannelEventSink))) {
NS_ADDREF_THIS();
*aResult = static_cast<nsIChannelEventSink *>(this);
return NS_OK;
}
return NS_ERROR_NO_INTERFACE;
}
//-----------------------------------------------------------------------------
// nsOfflineCacheUpdateItem::nsIChannelEventSink
//-----------------------------------------------------------------------------
NS_IMETHODIMP
nsOfflineCacheUpdateItem::OnChannelRedirect(nsIChannel *aOldChannel,
nsIChannel *aNewChannel,
PRUint32 aFlags)
{
nsCOMPtr<nsIURI> newURI;
nsresult rv = aNewChannel->GetURI(getter_AddRefs(newURI));
if (NS_FAILED(rv))
return rv;
nsCOMPtr<nsICachingChannel> oldCachingChannel =
do_QueryInterface(aOldChannel);
nsCOMPtr<nsICachingChannel> newCachingChannel =
do_QueryInterface(aOldChannel);
if (newCachingChannel) {
rv = newCachingChannel->SetCacheForOfflineUse(PR_TRUE);
NS_ENSURE_SUCCESS(rv, rv);
if (!mClientID.IsEmpty()) {
rv = newCachingChannel->SetOfflineCacheClientID(mClientID);
NS_ENSURE_SUCCESS(rv, rv);
}
}
PRBool match;
rv = newURI->SchemeIs("http", &match);
if (NS_FAILED(rv) || !match) {
if (NS_FAILED(newURI->SchemeIs("https", &match)) ||
!match) {
LOG(("rejected: URL is not of type http\n"));
return NS_ERROR_ABORT;
}
}
// HTTP request headers are not automatically forwarded to the new channel.
nsCOMPtr<nsIHttpChannel> httpChannel = do_QueryInterface(aNewChannel);
NS_ENSURE_STATE(httpChannel);
httpChannel->SetRequestHeader(NS_LITERAL_CSTRING("X-Moz"),
NS_LITERAL_CSTRING("offline-resource"),
PR_FALSE);
mChannel = aNewChannel;
return NS_OK;
}
//-----------------------------------------------------------------------------
// nsOfflineCacheUpdateItem::nsIDOMLoadStatus
//-----------------------------------------------------------------------------
NS_IMETHODIMP
nsOfflineCacheUpdateItem::GetSource(nsIDOMNode **aSource)
{
if (mSource) {
return CallQueryReferent(mSource.get(), aSource);
} else {
*aSource = nsnull;
return NS_OK;
}
}
NS_IMETHODIMP
nsOfflineCacheUpdateItem::GetUri(nsAString &aURI)
{
nsCAutoString spec;
nsresult rv = mURI->GetSpec(spec);
NS_ENSURE_SUCCESS(rv, rv);
CopyUTF8toUTF16(spec, aURI);
return NS_OK;
}
NS_IMETHODIMP
nsOfflineCacheUpdateItem::GetTotalSize(PRInt32 *aTotalSize)
{
if (mChannel) {
return mChannel->GetContentLength(aTotalSize);
}
*aTotalSize = -1;
return NS_OK;
}
NS_IMETHODIMP
nsOfflineCacheUpdateItem::GetLoadedSize(PRInt32 *aLoadedSize)
{
*aLoadedSize = mBytesRead;
return NS_OK;
}
NS_IMETHODIMP
nsOfflineCacheUpdateItem::GetReadyState(PRUint16 *aReadyState)
{
*aReadyState = mState;
return NS_OK;
}
NS_IMETHODIMP
nsOfflineCacheUpdateItem::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;
}
//-----------------------------------------------------------------------------
// nsOfflineCacheUpdate::nsISupports
//-----------------------------------------------------------------------------
NS_IMPL_ISUPPORTS1(nsOfflineCacheUpdate,
nsIOfflineCacheUpdate)
//-----------------------------------------------------------------------------
// nsOfflineCacheUpdate <public>
//-----------------------------------------------------------------------------
nsOfflineCacheUpdate::nsOfflineCacheUpdate()
: mState(STATE_UNINITIALIZED)
, mAddedItems(PR_FALSE)
, mPartialUpdate(PR_FALSE)
, mSucceeded(PR_TRUE)
, mCurrentItem(-1)
{
}
nsOfflineCacheUpdate::~nsOfflineCacheUpdate()
{
LOG(("nsOfflineCacheUpdate::~nsOfflineCacheUpdate [%p]", this));
}
nsresult
nsOfflineCacheUpdate::Init(PRBool aPartialUpdate,
const nsACString &aUpdateDomain,
const nsACString &aOwnerURI,
nsIURI *aReferrerURI)
{
nsresult rv;
// Make sure the service has been initialized
if (!nsOfflineCacheUpdateService::GetInstance()) {
return NS_ERROR_FAILURE;
}
LOG(("nsOfflineCacheUpdate::Init [%p]", this));
mPartialUpdate = aPartialUpdate;
mUpdateDomain = aUpdateDomain;
mOwnerURI = aOwnerURI;
mReferrerURI = aReferrerURI;
nsCOMPtr<nsICacheService> cacheService =
do_GetService(NS_CACHESERVICE_CONTRACTID, &rv);
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsICacheSession> session;
rv = cacheService->CreateSession("HTTP-offline",
nsICache::STORE_OFFLINE,
nsICache::STREAM_BASED,
getter_AddRefs(session));
NS_ENSURE_SUCCESS(rv, rv);
mMainCacheSession = do_QueryInterface(session, &rv);
NS_ENSURE_SUCCESS(rv, rv);
// Partial updates don't use temporary cache sessions
if (aPartialUpdate) {
mCacheSession = mMainCacheSession;
} else {
rv = cacheService->CreateTemporaryClientID(nsICache::STORE_OFFLINE,
mClientID);
NS_ENSURE_SUCCESS(rv, rv);
rv = cacheService->CreateSession(mClientID.get(),
nsICache::STORE_OFFLINE,
nsICache::STREAM_BASED,
getter_AddRefs(session));
NS_ENSURE_SUCCESS(rv, rv);
mCacheSession = do_QueryInterface(session, &rv);
NS_ENSURE_SUCCESS(rv, rv);
}
mState = STATE_INITIALIZED;
return NS_OK;
}
void
nsOfflineCacheUpdate::LoadCompleted()
{
nsresult rv;
LOG(("nsOfflineCacheUpdate::LoadCompleted [%p]", this));
nsRefPtr<nsOfflineCacheUpdateItem> item = mItems[mCurrentItem];
mCurrentItem++;
PRUint16 status;
rv = item->GetStatus(&status);
// Check for failures. Only connection or server errors (5XX) will cause
// the update to fail.
if (NS_FAILED(rv) || status == 0 || status >= 500) {
// Only fail updates from this domain. Outside-of-domain updates
// are not guaranteeed to be updated.
nsCAutoString domain;
item->mURI->GetHostPort(domain);
if (domain == mUpdateDomain) {
mSucceeded = PR_FALSE;
}
}
rv = NotifyCompleted(item);
if (NS_FAILED(rv)) return;
ProcessNextURI();
}
nsresult
nsOfflineCacheUpdate::Begin()
{
LOG(("nsOfflineCacheUpdate::Begin [%p]", this));
if (!mPartialUpdate) {
// All offline items for a domain should be updated as a group; add
// the other offline items requested for this domain
nsresult rv = AddDomainItems();
NS_ENSURE_SUCCESS(rv, rv);
}
mState = STATE_RUNNING;
mCurrentItem = 0;
ProcessNextURI();
return NS_OK;
}
nsresult
nsOfflineCacheUpdate::Cancel()
{
LOG(("nsOfflineCacheUpdate::Cancel [%p]", this));
mState = STATE_CANCELLED;
mSucceeded = PR_FALSE;
if (mCurrentItem >= 0 &&
mCurrentItem < static_cast<PRInt32>(mItems.Length())) {
// Load might be running
mItems[mCurrentItem]->Cancel();
}
return NS_OK;
}
//-----------------------------------------------------------------------------
// nsOfflineCacheUpdate <private>
//-----------------------------------------------------------------------------
nsresult
nsOfflineCacheUpdate::AddOwnedItems(const nsACString &aOwnerURI)
{
PRUint32 count;
char **keys;
nsresult rv = mMainCacheSession->GetOwnedKeys(mUpdateDomain, aOwnerURI,
&count, &keys);
NS_ENSURE_SUCCESS(rv, rv);
AutoFreeArray autoFree(count, keys);
for (PRUint32 i = 0; i < count; i++) {
nsCOMPtr<nsIURI> uri;
if (NS_SUCCEEDED(NS_NewURI(getter_AddRefs(uri), keys[i]))) {
nsRefPtr<nsOfflineCacheUpdateItem> item =
new nsOfflineCacheUpdateItem(this, uri, mReferrerURI,
nsnull, mClientID);
if (!item) return NS_ERROR_OUT_OF_MEMORY;
mItems.AppendElement(item);
}
}
return NS_OK;
}
// Add all URIs needed by this domain to the update
nsresult
nsOfflineCacheUpdate::AddDomainItems()
{
PRUint32 count;
char **uris;
nsresult rv = mMainCacheSession->GetOwnerURIs(mUpdateDomain, &count, &uris);
NS_ENSURE_SUCCESS(rv, rv);
AutoFreeArray autoFree(count, uris);
for (PRUint32 i = 0; i < count; i++) {
const char *ownerURI = uris[i];
// if this update includes changes to this owner URI, ignore the
// set in the database.
if (!mAddedItems || !mOwnerURI.Equals(ownerURI)) {
rv = AddOwnedItems(nsDependentCString(ownerURI));
NS_ENSURE_SUCCESS(rv, rv);
}
}
return NS_OK;
}
nsresult
nsOfflineCacheUpdate::ProcessNextURI()
{
LOG(("nsOfflineCacheUpdate::ProcessNextURI [%p, current=%d, numItems=%d]",
this, mCurrentItem, mItems.Length()));
if (mState == STATE_CANCELLED ||
mCurrentItem >= static_cast<PRInt32>(mItems.Length())) {
return Finish();
}
#if defined(PR_LOGGING)
if (LOG_ENABLED()) {
nsCAutoString spec;
mItems[mCurrentItem]->mURI->GetSpec(spec);
LOG(("%p: Opening channel for %s", this, spec.get()));
}
#endif
nsresult rv = mItems[mCurrentItem]->OpenChannel();
if (NS_FAILED(rv)) {
LoadCompleted();
return rv;
}
return NS_OK;
}
nsresult
nsOfflineCacheUpdate::NotifyCompleted(nsOfflineCacheUpdateItem *aItem)
{
nsCOMArray<nsIOfflineCacheUpdateObserver> observers;
for (PRInt32 i = 0; i < mWeakObservers.Count(); i++) {
nsCOMPtr<nsIOfflineCacheUpdateObserver> observer =
do_QueryReferent(mWeakObservers[i]);
if (observer)
observers.AppendObject(observer);
else
mWeakObservers.RemoveObjectAt(i--);
}
for (PRInt32 i = 0; i < mObservers.Count(); i++) {
observers.AppendObject(mObservers[i]);
}
for (PRInt32 i = 0; i < observers.Count(); i++) {
observers[i]->ItemCompleted(aItem);
}
return NS_OK;
}
nsresult
nsOfflineCacheUpdate::Finish()
{
LOG(("nsOfflineCacheUpdate::Finish [%p]", this));
mState = STATE_FINISHED;
nsOfflineCacheUpdateService *service =
nsOfflineCacheUpdateService::GetInstance();
if (!mPartialUpdate) {
if (mSucceeded) {
nsresult rv = mMainCacheSession->MergeTemporaryClientID(mClientID);
if (NS_FAILED(rv))
mSucceeded = PR_FALSE;
}
if (!mSucceeded) {
// Update was not merged, mark all the loads as failures
for (PRUint32 i = 0; i < mItems.Length(); i++) {
mItems[i]->Cancel();
}
}
}
if (!service)
return NS_ERROR_FAILURE;
return service->UpdateFinished(this);
}
//-----------------------------------------------------------------------------
// nsOfflineCacheUpdate::nsIOfflineCacheUpdate
//-----------------------------------------------------------------------------
NS_IMETHODIMP
nsOfflineCacheUpdate::GetUpdateDomain(nsACString &aUpdateDomain)
{
NS_ENSURE_TRUE(mState >= STATE_INITIALIZED, NS_ERROR_NOT_INITIALIZED);
aUpdateDomain = mUpdateDomain;
return NS_OK;
}
NS_IMETHODIMP
nsOfflineCacheUpdate::GetOwnerURI(nsACString &aOwnerURI)
{
NS_ENSURE_TRUE(mState >= STATE_INITIALIZED, NS_ERROR_NOT_INITIALIZED);
aOwnerURI = mOwnerURI;
return NS_OK;
}
NS_IMETHODIMP
nsOfflineCacheUpdate::AddURI(nsIURI *aURI, nsIDOMNode *aSource)
{
NS_ENSURE_TRUE(mState >= STATE_INITIALIZED, NS_ERROR_NOT_INITIALIZED);
if (mState >= STATE_RUNNING)
return NS_ERROR_NOT_AVAILABLE;
// only http and https urls can be put in the offline cache
PRBool match;
nsresult rv = aURI->SchemeIs("http", &match);
NS_ENSURE_SUCCESS(rv, rv);
if (!match) {
rv = aURI->SchemeIs("https", &match);
NS_ENSURE_SUCCESS(rv, rv);
if (!match)
return NS_ERROR_ABORT;
}
// Save the cache key as an owned URI
nsCAutoString spec;
rv = aURI->GetSpec(spec);
NS_ENSURE_SUCCESS(rv, rv);
// url fragments aren't used in cache keys
nsCAutoString::const_iterator specStart, specEnd;
spec.BeginReading(specStart);
spec.EndReading(specEnd);
if (FindCharInReadable('#', specStart, specEnd)) {
spec.BeginReading(specEnd);
rv = mCacheSession->AddOwnedKey(mUpdateDomain, mOwnerURI,
Substring(specEnd, specStart));
NS_ENSURE_SUCCESS(rv, rv);
} else {
rv = mCacheSession->AddOwnedKey(mUpdateDomain, mOwnerURI, spec);
NS_ENSURE_SUCCESS(rv, rv);
}
nsRefPtr<nsOfflineCacheUpdateItem> item =
new nsOfflineCacheUpdateItem(this, aURI, mReferrerURI,
aSource, mClientID);
if (!item) return NS_ERROR_OUT_OF_MEMORY;
mItems.AppendElement(item);
mAddedItems = PR_TRUE;
return NS_OK;
}
NS_IMETHODIMP
nsOfflineCacheUpdate::GetCount(PRUint32 *aNumItems)
{
LOG(("nsOfflineCacheUpdate::GetNumItems [%p, num=%d]",
this, mItems.Length()));
NS_ENSURE_TRUE(mState >= STATE_INITIALIZED, NS_ERROR_NOT_INITIALIZED);
*aNumItems = mItems.Length();
return NS_OK;
}
NS_IMETHODIMP
nsOfflineCacheUpdate::Item(PRUint32 aIndex, nsIDOMLoadStatus **aItem)
{
LOG(("nsOfflineCacheUpdate::GetItems [%p, index=%d]", this, aIndex));
NS_ENSURE_TRUE(mState >= STATE_INITIALIZED, NS_ERROR_NOT_INITIALIZED);
if (aIndex < mItems.Length())
NS_IF_ADDREF(*aItem = mItems.ElementAt(aIndex));
else
*aItem = nsnull;
return NS_OK;
}
NS_IMETHODIMP
nsOfflineCacheUpdate::AddObserver(nsIOfflineCacheUpdateObserver *aObserver,
PRBool aHoldWeak)
{
LOG(("nsOfflineCacheUpdate::AddObserver [%p]", this));
NS_ENSURE_TRUE(mState >= STATE_INITIALIZED, NS_ERROR_NOT_INITIALIZED);
if (aHoldWeak) {
nsCOMPtr<nsIWeakReference> weakRef = do_GetWeakReference(aObserver);
mWeakObservers.AppendObject(weakRef);
} else {
mObservers.AppendObject(aObserver);
}
return NS_OK;
}
NS_IMETHODIMP
nsOfflineCacheUpdate::RemoveObserver(nsIOfflineCacheUpdateObserver *aObserver)
{
LOG(("nsOfflineCacheUpdate::RemoveObserver [%p]", this));
NS_ENSURE_TRUE(mState >= STATE_INITIALIZED, NS_ERROR_NOT_INITIALIZED);
for (PRInt32 i = 0; i < mWeakObservers.Count(); i++) {
nsCOMPtr<nsIOfflineCacheUpdateObserver> observer =
do_QueryReferent(mWeakObservers[i]);
if (observer == aObserver) {
mWeakObservers.RemoveObjectAt(i);
return NS_OK;
}
}
for (PRInt32 i = 0; i < mObservers.Count(); i++) {
if (mObservers[i] == aObserver) {
mObservers.RemoveObjectAt(i);
return NS_OK;
}
}
return NS_OK;
}
NS_IMETHODIMP
nsOfflineCacheUpdate::Schedule()
{
LOG(("nsOfflineCacheUpdate::Schedule [%p]", this));
nsOfflineCacheUpdateService *service =
nsOfflineCacheUpdateService::GetInstance();
if (!service) {
return NS_ERROR_FAILURE;
}
return service->Schedule(this);
}
NS_IMETHODIMP
nsOfflineCacheUpdate::ScheduleOnDocumentStop(nsIDOMDocument *aDocument)
{
LOG(("nsOfflineCacheUpdate::ScheduleOnDocumentStop [%p]", this));
nsOfflineCacheUpdateService *service =
nsOfflineCacheUpdateService::GetInstance();
if (!service) {
return NS_ERROR_FAILURE;
}
return service->ScheduleOnDocumentStop(this, aDocument);
}
//-----------------------------------------------------------------------------
// nsOfflineCacheUpdateService::nsISupports
//-----------------------------------------------------------------------------
NS_IMPL_ISUPPORTS4(nsOfflineCacheUpdateService,
nsIOfflineCacheUpdateService,
nsIWebProgressListener,
nsIObserver,
nsISupportsWeakReference)
//-----------------------------------------------------------------------------
// nsOfflineCacheUpdateService <public>
//-----------------------------------------------------------------------------
nsOfflineCacheUpdateService::nsOfflineCacheUpdateService()
: mDisabled(PR_FALSE)
, mUpdateRunning(PR_FALSE)
{
}
nsOfflineCacheUpdateService::~nsOfflineCacheUpdateService()
{
gOfflineCacheUpdateService = nsnull;
}
nsresult
nsOfflineCacheUpdateService::Init()
{
nsresult rv;
#if defined(PR_LOGGING)
if (!gOfflineCacheUpdateLog)
gOfflineCacheUpdateLog = PR_NewLogModule("nsOfflineCacheUpdate");
#endif
if (!mDocUpdates.Init())
return NS_ERROR_FAILURE;
// Observe xpcom-shutdown event
nsCOMPtr<nsIObserverService> observerService =
do_GetService("@mozilla.org/observer-service;1", &rv);
NS_ENSURE_SUCCESS(rv, rv);
rv = observerService->AddObserver(this,
NS_XPCOM_SHUTDOWN_OBSERVER_ID,
PR_TRUE);
NS_ENSURE_SUCCESS(rv, rv);
// Register as an observer for the document loader
nsCOMPtr<nsIWebProgress> progress =
do_GetService(NS_DOCUMENTLOADER_SERVICE_CONTRACTID);
if (progress) {
nsresult rv = progress->AddProgressListener
(this, nsIWebProgress::NOTIFY_STATE_DOCUMENT);
NS_ENSURE_SUCCESS(rv, rv);
}
gOfflineCacheUpdateService = this;
return NS_OK;
}
nsOfflineCacheUpdateService *
nsOfflineCacheUpdateService::GetInstance()
{
if (!gOfflineCacheUpdateService) {
gOfflineCacheUpdateService = new nsOfflineCacheUpdateService();
if (!gOfflineCacheUpdateService)
return nsnull;
NS_ADDREF(gOfflineCacheUpdateService);
nsresult rv = gOfflineCacheUpdateService->Init();
if (NS_FAILED(rv)) {
NS_RELEASE(gOfflineCacheUpdateService);
return nsnull;
}
return gOfflineCacheUpdateService;
}
NS_ADDREF(gOfflineCacheUpdateService);
return gOfflineCacheUpdateService;
}
nsresult
nsOfflineCacheUpdateService::Schedule(nsOfflineCacheUpdate *aUpdate)
{
LOG(("nsOfflineCacheUpdateService::Schedule [%p, update=%p]",
this, aUpdate));
nsresult rv;
nsCOMPtr<nsIObserverService> observerService =
do_GetService("@mozilla.org/observer-service;1", &rv);
NS_ENSURE_SUCCESS(rv, rv);
observerService->NotifyObservers(static_cast<nsIOfflineCacheUpdate*>(aUpdate),
"offline-cache-update-added",
nsnull);
mUpdates.AppendElement(aUpdate);
ProcessNextUpdate();
return NS_OK;
}
nsresult
nsOfflineCacheUpdateService::ScheduleOnDocumentStop(nsOfflineCacheUpdate *aUpdate,
nsIDOMDocument *aDocument)
{
LOG(("nsOfflineCacheUpdateService::ScheduleOnDocumentStop [%p, update=%p, doc=%p]",
this, aUpdate, aDocument));
if (!mDocUpdates.Put(aDocument, aUpdate))
return NS_ERROR_FAILURE;
return NS_OK;
}
nsresult
nsOfflineCacheUpdateService::UpdateFinished(nsOfflineCacheUpdate *aUpdate)
{
LOG(("nsOfflineCacheUpdateService::UpdateFinished [%p, update=%p]",
this, aUpdate));
NS_ASSERTION(mUpdates.Length() > 0 &&
mUpdates[0] == aUpdate, "Unknown update completed");
// keep this item alive until we're done notifying observers
nsRefPtr<nsOfflineCacheUpdate> update = mUpdates[0];
mUpdates.RemoveElementAt(0);
mUpdateRunning = PR_FALSE;
nsresult rv;
nsCOMPtr<nsIObserverService> observerService =
do_GetService("@mozilla.org/observer-service;1", &rv);
NS_ENSURE_SUCCESS(rv, rv);
observerService->NotifyObservers(static_cast<nsIOfflineCacheUpdate*>(aUpdate),
"offline-cache-update-completed",
nsnull);
ProcessNextUpdate();
return NS_OK;
}
//-----------------------------------------------------------------------------
// nsOfflineCacheUpdateService <private>
//-----------------------------------------------------------------------------
nsresult
nsOfflineCacheUpdateService::ProcessNextUpdate()
{
LOG(("nsOfflineCacheUpdateService::ProcessNextUpdate [%p, num=%d]",
this, mUpdates.Length()));
if (mDisabled)
return NS_ERROR_ABORT;
if (mUpdateRunning)
return NS_OK;
if (mUpdates.Length() > 0) {
mUpdateRunning = PR_TRUE;
return mUpdates[0]->Begin();
}
return NS_OK;
}
//-----------------------------------------------------------------------------
// nsOfflineCacheUpdateService::nsIOfflineCacheUpdateService
//-----------------------------------------------------------------------------
NS_IMETHODIMP
nsOfflineCacheUpdateService::GetNumUpdates(PRUint32 *aNumUpdates)
{
LOG(("nsOfflineCacheUpdateService::GetNumUpdates [%p]", this));
*aNumUpdates = mUpdates.Length();
return NS_OK;
}
NS_IMETHODIMP
nsOfflineCacheUpdateService::GetUpdate(PRUint32 aIndex,
nsIOfflineCacheUpdate **aUpdate)
{
LOG(("nsOfflineCacheUpdateService::GetUpdate [%p, %d]", this, aIndex));
if (aIndex < mUpdates.Length()) {
NS_ADDREF(*aUpdate = mUpdates[aIndex]);
} else {
*aUpdate = nsnull;
}
return NS_OK;
}
//-----------------------------------------------------------------------------
// nsOfflineCacheUpdateService::nsIObserver
//-----------------------------------------------------------------------------
NS_IMETHODIMP
nsOfflineCacheUpdateService::Observe(nsISupports *aSubject,
const char *aTopic,
const PRUnichar *aData)
{
if (!strcmp(aTopic, NS_XPCOM_SHUTDOWN_OBSERVER_ID)) {
if (mUpdates.Length() > 0)
mUpdates[0]->Cancel();
mDisabled = PR_TRUE;
}
return NS_OK;
}
//-----------------------------------------------------------------------------
// nsOfflineCacheUpdateService::nsIWebProgressListener
//-----------------------------------------------------------------------------
NS_IMETHODIMP
nsOfflineCacheUpdateService::OnProgressChange(nsIWebProgress *aProgress,
nsIRequest *aRequest,
PRInt32 curSelfProgress,
PRInt32 maxSelfProgress,
PRInt32 curTotalProgress,
PRInt32 maxTotalProgress)
{
NS_NOTREACHED("notification excluded in AddProgressListener(...)");
return NS_OK;
}
NS_IMETHODIMP
nsOfflineCacheUpdateService::OnStateChange(nsIWebProgress* aWebProgress,
nsIRequest *aRequest,
PRUint32 progressStateFlags,
nsresult aStatus)
{
if ((progressStateFlags & STATE_IS_DOCUMENT) &&
(progressStateFlags & STATE_STOP)) {
if (mDocUpdates.Count() == 0)
return NS_OK;
nsCOMPtr<nsIDOMWindow> window;
aWebProgress->GetDOMWindow(getter_AddRefs(window));
if (!window) return NS_OK;
nsCOMPtr<nsIDOMDocument> doc;
window->GetDocument(getter_AddRefs(doc));
if (!doc) return NS_OK;
LOG(("nsOfflineCacheUpdateService::OnStateChange [%p, doc=%p]",
this, doc.get()));
nsRefPtr<nsOfflineCacheUpdate> update;
if (mDocUpdates.Get(doc, getter_AddRefs(update))) {
Schedule(update);
mDocUpdates.Remove(doc);
}
return NS_OK;
}
return NS_OK;
}
NS_IMETHODIMP
nsOfflineCacheUpdateService::OnLocationChange(nsIWebProgress* aWebProgress,
nsIRequest* aRequest,
nsIURI *location)
{
NS_NOTREACHED("notification excluded in AddProgressListener(...)");
return NS_OK;
}
NS_IMETHODIMP
nsOfflineCacheUpdateService::OnStatusChange(nsIWebProgress* aWebProgress,
nsIRequest* aRequest,
nsresult aStatus,
const PRUnichar* aMessage)
{
NS_NOTREACHED("notification excluded in AddProgressListener(...)");
return NS_OK;
}
NS_IMETHODIMP
nsOfflineCacheUpdateService::OnSecurityChange(nsIWebProgress *aWebProgress,
nsIRequest *aRequest,
PRUint32 state)
{
NS_NOTREACHED("notification excluded in AddProgressListener(...)");
return NS_OK;
}
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