pjs/dom/indexedDB/CheckQuotaHelper.cpp

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9.5 KiB
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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/* ***** 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 Indexed Database.
*
* The Initial Developer of the Original Code is
* The Mozilla Foundation.
* Portions created by the Initial Developer are Copyright (C) 2010
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Ben Turner <bent.mozilla@gmail.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 "CheckQuotaHelper.h"
#include "nsIDOMWindow.h"
#include "nsIObserverService.h"
#include "nsIPermissionManager.h"
#include "nsIPrincipal.h"
#include "nsIScriptObjectPrincipal.h"
#include "nsIURI.h"
#include "nsContentUtils.h"
#include "nsNetUtil.h"
#include "nsThreadUtils.h"
#include "mozilla/Services.h"
#include "IDBFactory.h"
#define PERMISSION_INDEXEDDB_UNLIMITED "indexedDB-unlimited"
#define TOPIC_QUOTA_PROMPT "indexedDB-quota-prompt"
#define TOPIC_QUOTA_RESPONSE "indexedDB-quota-response"
#define TOPIC_QUOTA_CANCEL "indexedDB-quota-cancel"
USING_INDEXEDDB_NAMESPACE
using namespace mozilla::services;
using mozilla::MutexAutoLock;
namespace {
inline
PRUint32
GetQuotaPermissions(const nsACString& aASCIIOrigin,
nsIDOMWindow* aWindow)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
nsCOMPtr<nsIScriptObjectPrincipal> sop(do_QueryInterface(aWindow));
NS_ENSURE_TRUE(sop, nsIPermissionManager::DENY_ACTION);
if (nsContentUtils::IsSystemPrincipal(sop->GetPrincipal())) {
return nsIPermissionManager::ALLOW_ACTION;
}
nsCOMPtr<nsIURI> uri;
nsresult rv = NS_NewURI(getter_AddRefs(uri), aASCIIOrigin);
NS_ENSURE_SUCCESS(rv, nsIPermissionManager::DENY_ACTION);
nsCOMPtr<nsIPermissionManager> permissionManager =
do_GetService(NS_PERMISSIONMANAGER_CONTRACTID);
NS_ENSURE_TRUE(permissionManager, nsIPermissionManager::DENY_ACTION);
PRUint32 permission;
rv = permissionManager->TestPermission(uri, PERMISSION_INDEXEDDB_UNLIMITED,
&permission);
NS_ENSURE_SUCCESS(rv, nsIPermissionManager::DENY_ACTION);
return permission;
}
} // anonymous namespace
CheckQuotaHelper::CheckQuotaHelper(IDBDatabase* aDatabase,
mozilla::Mutex& aMutex)
: mWindow(aDatabase->Owner()),
mWindowSerial(mWindow->GetSerial()),
mOrigin(aDatabase->Origin()),
mMutex(aMutex),
mCondVar(mMutex, "CheckQuotaHelper::mCondVar"),
mPromptResult(0),
mWaiting(true),
mHasPrompted(false)
{
NS_ASSERTION(!NS_IsMainThread(), "Wrong thread!");
mMutex.AssertCurrentThreadOwns();
}
bool
CheckQuotaHelper::PromptAndReturnQuotaIsDisabled()
{
NS_ASSERTION(!NS_IsMainThread(), "Wrong thread!");
mMutex.AssertCurrentThreadOwns();
while (mWaiting) {
mCondVar.Wait();
}
NS_ASSERTION(!mWindow, "This should always be null here!");
NS_ASSERTION(mPromptResult == nsIPermissionManager::ALLOW_ACTION ||
mPromptResult == nsIPermissionManager::DENY_ACTION ||
mPromptResult == nsIPermissionManager::UNKNOWN_ACTION,
"Unknown permission!");
return mPromptResult == nsIPermissionManager::ALLOW_ACTION;
}
void
CheckQuotaHelper::Cancel()
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
mMutex.AssertCurrentThreadOwns();
if (mWaiting && !mHasPrompted) {
MutexAutoUnlock unlock(mMutex);
// First close any prompts that are open for this window.
nsCOMPtr<nsIObserverService> obs = GetObserverService();
NS_WARN_IF_FALSE(obs, "Failed to get observer service!");
if (obs && NS_FAILED(obs->NotifyObservers(static_cast<nsIRunnable*>(this),
TOPIC_QUOTA_CANCEL, nsnull))) {
NS_WARNING("Failed to notify observers!");
}
// If that didn't trigger an Observe callback (maybe the window had already
// died?) then go ahead and do it manually.
if (!mHasPrompted) {
nsAutoString response;
response.AppendInt(nsIPermissionManager::UNKNOWN_ACTION);
if (NS_SUCCEEDED(Observe(nsnull, TOPIC_QUOTA_RESPONSE, response.get()))) {
NS_ASSERTION(mHasPrompted, "Should have set this in Observe!");
}
else {
NS_WARNING("Failed to notify!");
}
}
}
}
NS_IMPL_THREADSAFE_ISUPPORTS3(CheckQuotaHelper, nsIRunnable,
nsIInterfaceRequestor,
nsIObserver)
NS_IMETHODIMP
CheckQuotaHelper::Run()
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
if (!mHasPrompted) {
mPromptResult = GetQuotaPermissions(mOrigin, mWindow);
}
nsresult rv;
if (mHasPrompted) {
if (mPromptResult != nsIPermissionManager::UNKNOWN_ACTION) {
nsCOMPtr<nsIURI> uri;
rv = NS_NewURI(getter_AddRefs(uri), mOrigin);
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIPermissionManager> permissionManager =
do_GetService(NS_PERMISSIONMANAGER_CONTRACTID);
NS_ENSURE_STATE(permissionManager);
rv = permissionManager->Add(uri, PERMISSION_INDEXEDDB_UNLIMITED,
mPromptResult,
nsIPermissionManager::EXPIRE_NEVER, 0);
NS_ENSURE_SUCCESS(rv, rv);
}
}
else if (mPromptResult == nsIPermissionManager::UNKNOWN_ACTION) {
PRUint32 quota = IDBFactory::GetIndexedDBQuota();
NS_ASSERTION(quota, "Shouldn't get here if quota is disabled!");
nsString quotaString;
quotaString.AppendInt(quota);
nsCOMPtr<nsIObserverService> obs = GetObserverService();
NS_ENSURE_STATE(obs);
// We have to watch to make sure that the window doesn't go away without
// responding to us. Otherwise our database threads will hang.
rv = obs->AddObserver(this, DOM_WINDOW_DESTROYED_TOPIC, PR_FALSE);
NS_ENSURE_SUCCESS(rv, rv);
rv = obs->NotifyObservers(static_cast<nsIRunnable*>(this),
TOPIC_QUOTA_PROMPT, quotaString.get());
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
MutexAutoLock lock(mMutex);
NS_ASSERTION(mWaiting, "Huh?!");
// This should never be used again.
mWindow = nsnull;
mWaiting = false;
mCondVar.NotifyAll();
return NS_OK;
}
NS_IMETHODIMP
CheckQuotaHelper::GetInterface(const nsIID& aIID,
void** aResult)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
if (aIID.Equals(NS_GET_IID(nsIObserver))) {
return QueryInterface(aIID, aResult);
}
if (aIID.Equals(NS_GET_IID(nsIDOMWindow))) {
return mWindow->QueryInterface(aIID, aResult);
}
*aResult = nsnull;
return NS_ERROR_NOT_AVAILABLE;
}
NS_IMETHODIMP
CheckQuotaHelper::Observe(nsISupports* aSubject,
const char* aTopic,
const PRUnichar* aData)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
nsresult rv;
if (!strcmp(aTopic, TOPIC_QUOTA_RESPONSE)) {
if (!mHasPrompted) {
mHasPrompted = true;
mPromptResult = nsDependentString(aData).ToInteger(&rv);
NS_ENSURE_SUCCESS(rv, rv);
rv = NS_DispatchToCurrentThread(this);
NS_ENSURE_SUCCESS(rv, rv);
// We no longer care about the window here.
nsCOMPtr<nsIObserverService> obs = GetObserverService();
NS_ENSURE_STATE(obs);
rv = obs->RemoveObserver(this, DOM_WINDOW_DESTROYED_TOPIC);
NS_ENSURE_SUCCESS(rv, rv);
}
return NS_OK;
}
if (!strcmp(aTopic, DOM_WINDOW_DESTROYED_TOPIC)) {
NS_ASSERTION(!mHasPrompted, "Should have removed observer before now!");
NS_ASSERTION(mWindow, "This should never be null!");
nsCOMPtr<nsPIDOMWindow> window(do_QueryInterface(aSubject));
NS_ENSURE_STATE(window);
if (mWindow->GetSerial() == window->GetSerial()) {
// This is our window, dying, without responding to our prompt! Fake one.
mHasPrompted = true;
mPromptResult = nsIPermissionManager::UNKNOWN_ACTION;
rv = NS_DispatchToCurrentThread(this);
NS_ENSURE_SUCCESS(rv, rv);
// We no longer care about the window here.
nsCOMPtr<nsIObserverService> obs = GetObserverService();
NS_ENSURE_STATE(obs);
rv = obs->RemoveObserver(this, DOM_WINDOW_DESTROYED_TOPIC);
NS_ENSURE_SUCCESS(rv, rv);
}
return NS_OK;
}
NS_NOTREACHED("Unexpected topic!");
return NS_ERROR_UNEXPECTED;
}