gecko/uriloader/prefetch/nsOfflineCacheUpdate.h
2010-08-30 13:20:39 -07:00

353 lines
11 KiB
C++

/* -*- 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 ***** */
#ifndef nsOfflineCacheUpdate_h__
#define nsOfflineCacheUpdate_h__
#include "nsIOfflineCacheUpdate.h"
#include "nsAutoPtr.h"
#include "nsCOMArray.h"
#include "nsCOMPtr.h"
#include "nsICacheService.h"
#include "nsIChannelEventSink.h"
#include "nsIDOMDocument.h"
#include "nsIDOMNode.h"
#include "nsIDOMLoadStatus.h"
#include "nsIInterfaceRequestor.h"
#include "nsIMutableArray.h"
#include "nsIObserver.h"
#include "nsIObserverService.h"
#include "nsIApplicationCache.h"
#include "nsIRequestObserver.h"
#include "nsIRunnable.h"
#include "nsIStreamListener.h"
#include "nsIURI.h"
#include "nsIWebProgressListener.h"
#include "nsClassHashtable.h"
#include "nsString.h"
#include "nsTArray.h"
#include "nsWeakReference.h"
#include "nsICryptoHash.h"
class nsOfflineCacheUpdate;
class nsICacheEntryDescriptor;
class nsIUTF8StringEnumerator;
class nsOfflineCacheUpdateItem : public nsIDOMLoadStatus
, public nsIStreamListener
, public nsIRunnable
, public nsIInterfaceRequestor
, public nsIChannelEventSink
{
public:
NS_DECL_ISUPPORTS
NS_DECL_NSIDOMLOADSTATUS
NS_DECL_NSIREQUESTOBSERVER
NS_DECL_NSISTREAMLISTENER
NS_DECL_NSIRUNNABLE
NS_DECL_NSIINTERFACEREQUESTOR
NS_DECL_NSICHANNELEVENTSINK
nsOfflineCacheUpdateItem(nsOfflineCacheUpdate *aUpdate,
nsIURI *aURI,
nsIURI *aReferrerURI,
nsIApplicationCache *aPreviousApplicationCache,
const nsACString &aClientID,
PRUint32 aType);
virtual ~nsOfflineCacheUpdateItem();
nsCOMPtr<nsIURI> mURI;
nsCOMPtr<nsIURI> mReferrerURI;
nsCOMPtr<nsIApplicationCache> mPreviousApplicationCache;
nsCString mClientID;
nsCString mCacheKey;
PRUint32 mItemType;
nsresult OpenChannel();
nsresult Cancel();
nsresult GetRequestSucceeded(PRBool * succeeded);
private:
nsOfflineCacheUpdate* mUpdate;
nsCOMPtr<nsIChannel> mChannel;
PRUint16 mState;
protected:
PRInt32 mBytesRead;
};
class nsOfflineManifestItem : public nsOfflineCacheUpdateItem
{
public:
NS_DECL_NSISTREAMLISTENER
NS_DECL_NSIREQUESTOBSERVER
nsOfflineManifestItem(nsOfflineCacheUpdate *aUpdate,
nsIURI *aURI,
nsIURI *aReferrerURI,
nsIApplicationCache *aPreviousApplicationCache,
const nsACString &aClientID);
virtual ~nsOfflineManifestItem();
nsCOMArray<nsIURI> &GetExplicitURIs() { return mExplicitURIs; }
nsCOMArray<nsIURI> &GetFallbackURIs() { return mFallbackURIs; }
nsTArray<nsCString> &GetOpportunisticNamespaces()
{ return mOpportunisticNamespaces; }
nsIArray *GetNamespaces()
{ return mNamespaces.get(); }
PRBool ParseSucceeded()
{ return (mParserState != PARSE_INIT && mParserState != PARSE_ERROR); }
PRBool NeedsUpdate() { return mParserState != PARSE_INIT && mNeedsUpdate; }
void GetManifestHash(nsCString &aManifestHash)
{ aManifestHash = mManifestHashValue; }
private:
static NS_METHOD ReadManifest(nsIInputStream *aInputStream,
void *aClosure,
const char *aFromSegment,
PRUint32 aOffset,
PRUint32 aCount,
PRUint32 *aBytesConsumed);
nsresult AddNamespace(PRUint32 namespaceType,
const nsCString &namespaceSpec,
const nsCString &data);
nsresult HandleManifestLine(const nsCString::const_iterator &aBegin,
const nsCString::const_iterator &aEnd);
/**
* Saves "offline-manifest-hash" meta data from the old offline cache
* token to mOldManifestHashValue member to be compared on
* successfull load.
*/
nsresult GetOldManifestContentHash(nsIRequest *aRequest);
/**
* This method setups the mNeedsUpdate to PR_FALSE when hash value
* of the just downloaded manifest file is the same as stored in cache's
* "offline-manifest-hash" meta data. Otherwise stores the new value
* to this meta data.
*/
nsresult CheckNewManifestContentHash(nsIRequest *aRequest);
void ReadStrictFileOriginPolicyPref();
enum {
PARSE_INIT,
PARSE_CACHE_ENTRIES,
PARSE_FALLBACK_ENTRIES,
PARSE_BYPASS_ENTRIES,
PARSE_ERROR
} mParserState;
nsCString mReadBuf;
nsCOMArray<nsIURI> mExplicitURIs;
nsCOMArray<nsIURI> mFallbackURIs;
// All opportunistic caching namespaces. Used to decide whether
// to include previously-opportunistically-cached entries.
nsTArray<nsCString> mOpportunisticNamespaces;
// Array of nsIApplicationCacheNamespace objects specified by the
// manifest.
nsCOMPtr<nsIMutableArray> mNamespaces;
PRBool mNeedsUpdate;
PRBool mStrictFileOriginPolicy;
// manifest hash data
nsCOMPtr<nsICryptoHash> mManifestHash;
PRBool mManifestHashInitialized;
nsCString mManifestHashValue;
nsCString mOldManifestHashValue;
};
class nsOfflineCacheUpdateOwner
{
public:
virtual nsresult UpdateFinished(nsOfflineCacheUpdate *aUpdate) = 0;
};
class nsOfflineCacheUpdate : public nsIOfflineCacheUpdate
, public nsOfflineCacheUpdateOwner
{
public:
NS_DECL_ISUPPORTS
NS_DECL_NSIOFFLINECACHEUPDATE
nsOfflineCacheUpdate();
~nsOfflineCacheUpdate();
static nsresult GetCacheKey(nsIURI *aURI, nsACString &aKey);
nsresult Init();
nsresult Begin();
nsresult Cancel();
void LoadCompleted();
void ManifestCheckCompleted(nsresult aStatus,
const nsCString &aManifestHash);
void AddDocument(nsIDOMDocument *aDocument);
void SetOwner(nsOfflineCacheUpdateOwner *aOwner);
virtual nsresult UpdateFinished(nsOfflineCacheUpdate *aUpdate);
private:
nsresult HandleManifest(PRBool *aDoUpdate);
nsresult AddURI(nsIURI *aURI, PRUint32 aItemType);
nsresult ProcessNextURI();
// Adds items from the previous cache witha type matching aType.
// If namespaceFilter is non-null, only items matching the
// specified namespaces will be added.
nsresult AddExistingItems(PRUint32 aType,
nsTArray<nsCString>* namespaceFilter = nsnull);
nsresult GatherObservers(nsCOMArray<nsIOfflineCacheUpdateObserver> &aObservers);
nsresult NotifyError();
nsresult NotifyChecking();
nsresult NotifyNoUpdate();
nsresult NotifyObsolete();
nsresult NotifyDownloading();
nsresult NotifyStarted(nsOfflineCacheUpdateItem *aItem);
nsresult NotifyCompleted(nsOfflineCacheUpdateItem *aItem);
nsresult AssociateDocument(nsIDOMDocument *aDocument,
nsIApplicationCache *aApplicationCache);
nsresult ScheduleImplicit();
nsresult Finish();
enum {
STATE_UNINITIALIZED,
STATE_INITIALIZED,
STATE_CHECKING,
STATE_DOWNLOADING,
STATE_CANCELLED,
STATE_FINISHED
} mState;
nsOfflineCacheUpdateOwner *mOwner;
PRPackedBool mAddedItems;
PRPackedBool mPartialUpdate;
PRPackedBool mSucceeded;
PRPackedBool mObsolete;
nsCString mUpdateDomain;
nsCOMPtr<nsIURI> mManifestURI;
nsCOMPtr<nsIURI> mDocumentURI;
nsCString mClientID;
nsCOMPtr<nsIApplicationCache> mApplicationCache;
nsCOMPtr<nsIApplicationCache> mPreviousApplicationCache;
nsCOMPtr<nsIObserverService> mObserverService;
nsRefPtr<nsOfflineManifestItem> mManifestItem;
/* Items being updated */
PRInt32 mCurrentItem;
nsTArray<nsRefPtr<nsOfflineCacheUpdateItem> > mItems;
/* Clients watching this update for changes */
nsCOMArray<nsIWeakReference> mWeakObservers;
nsCOMArray<nsIOfflineCacheUpdateObserver> mObservers;
/* Documents that requested this update */
nsCOMArray<nsIDOMDocument> mDocuments;
/* Reschedule count. When an update is rescheduled due to
* mismatched manifests, the reschedule count will be increased. */
PRUint32 mRescheduleCount;
nsRefPtr<nsOfflineCacheUpdate> mImplicitUpdate;
};
class nsOfflineCacheUpdateService : public nsIOfflineCacheUpdateService
, public nsIObserver
, public nsOfflineCacheUpdateOwner
, public nsSupportsWeakReference
{
public:
NS_DECL_ISUPPORTS
NS_DECL_NSIOFFLINECACHEUPDATESERVICE
NS_DECL_NSIOBSERVER
nsOfflineCacheUpdateService();
~nsOfflineCacheUpdateService();
nsresult Init();
nsresult Schedule(nsOfflineCacheUpdate *aUpdate);
nsresult Schedule(nsIURI *aManifestURI,
nsIURI *aDocumentURI,
nsIDOMDocument *aDocument,
nsIOfflineCacheUpdate **aUpdate);
virtual nsresult UpdateFinished(nsOfflineCacheUpdate *aUpdate);
/**
* Returns the singleton nsOfflineCacheUpdateService without an addref, or
* nsnull if the service couldn't be created.
*/
static nsOfflineCacheUpdateService *EnsureService();
/** Addrefs and returns the singleton nsOfflineCacheUpdateService. */
static nsOfflineCacheUpdateService *GetInstance();
private:
nsresult ProcessNextUpdate();
nsTArray<nsRefPtr<nsOfflineCacheUpdate> > mUpdates;
PRBool mDisabled;
PRBool mUpdateRunning;
};
#endif