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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "mozilla/dom/cache/DBAction.h"
#include "mozilla/dom/cache/Connection.h"
#include "mozilla/dom/cache/DBSchema.h"
#include "mozilla/dom/cache/FileUtils.h"
#include "mozilla/dom/quota/PersistenceType.h"
#include "mozilla/net/nsFileProtocolHandler.h"
#include "mozIStorageConnection.h"
#include "mozIStorageService.h"
#include "mozStorageCID.h"
#include "nsIFile.h"
#include "nsIURI.h"
#include "nsIFileURL.h"
#include "nsThreadUtils.h"
namespace mozilla {
namespace dom {
namespace cache {
using mozilla::dom::quota::PERSISTENCE_TYPE_DEFAULT;
using mozilla::dom::quota::PersistenceType;
DBAction::DBAction(Mode aMode)
: mMode(aMode)
{
}
DBAction::~DBAction()
{
}
void
DBAction::RunOnTarget(Resolver* aResolver, const QuotaInfo& aQuotaInfo,
Data* aOptionalData)
{
MOZ_ASSERT(!NS_IsMainThread());
MOZ_DIAGNOSTIC_ASSERT(aResolver);
MOZ_DIAGNOSTIC_ASSERT(aQuotaInfo.mDir);
if (IsCanceled()) {
aResolver->Resolve(NS_ERROR_ABORT);
return;
}
nsCOMPtr<nsIFile> dbDir;
nsresult rv = aQuotaInfo.mDir->Clone(getter_AddRefs(dbDir));
if (NS_WARN_IF(NS_FAILED(rv))) {
aResolver->Resolve(rv);
return;
}
rv = dbDir->Append(NS_LITERAL_STRING("cache"));
if (NS_WARN_IF(NS_FAILED(rv))) {
aResolver->Resolve(rv);
return;
}
nsCOMPtr<mozIStorageConnection> conn;
// Attempt to reuse the connection opened by a previous Action.
if (aOptionalData) {
conn = aOptionalData->GetConnection();
}
// If there is no previous Action, then we must open one.
if (!conn) {
rv = OpenConnection(aQuotaInfo, dbDir, getter_AddRefs(conn));
if (NS_WARN_IF(NS_FAILED(rv))) {
aResolver->Resolve(rv);
return;
}
MOZ_DIAGNOSTIC_ASSERT(conn);
// Save this connection in the shared Data object so later Actions can
// use it. This avoids opening a new connection for every Action.
if (aOptionalData) {
// Since we know this connection will be around for as long as the
// Cache is open, use our special wrapped connection class. This
// will let us perform certain operations once the Cache origin
// is closed.
nsCOMPtr<mozIStorageConnection> wrapped = new Connection(conn);
aOptionalData->SetConnection(wrapped);
}
}
RunWithDBOnTarget(aResolver, aQuotaInfo, dbDir, conn);
}
nsresult
DBAction::OpenConnection(const QuotaInfo& aQuotaInfo, nsIFile* aDBDir,
mozIStorageConnection** aConnOut)
{
MOZ_ASSERT(!NS_IsMainThread());
MOZ_DIAGNOSTIC_ASSERT(aDBDir);
MOZ_DIAGNOSTIC_ASSERT(aConnOut);
nsCOMPtr<mozIStorageConnection> conn;
bool exists;
nsresult rv = aDBDir->Exists(&exists);
if (NS_WARN_IF(NS_FAILED(rv))) { return rv; }
if (!exists) {
if (NS_WARN_IF(mMode != Create)) { return NS_ERROR_FILE_NOT_FOUND; }
rv = aDBDir->Create(nsIFile::DIRECTORY_TYPE, 0755);
if (NS_WARN_IF(NS_FAILED(rv))) { return rv; }
}
nsCOMPtr<nsIFile> dbFile;
rv = aDBDir->Clone(getter_AddRefs(dbFile));
if (NS_WARN_IF(NS_FAILED(rv))) { return rv; }
rv = dbFile->Append(NS_LITERAL_STRING("caches.sqlite"));
if (NS_WARN_IF(NS_FAILED(rv))) { return rv; }
rv = dbFile->Exists(&exists);
if (NS_WARN_IF(NS_FAILED(rv))) { return rv; }
// Use our default file:// protocol handler directly to construct the database
// URL. This avoids any problems if a plugin registers a custom file://
// handler. If such a custom handler used javascript, then we would have a
// bad time running off the main thread here.
RefPtr<nsFileProtocolHandler> handler = new nsFileProtocolHandler();
rv = handler->Init();
if (NS_WARN_IF(NS_FAILED(rv))) { return rv; }
nsCOMPtr<nsIURI> uri;
rv = handler->NewFileURI(dbFile, getter_AddRefs(uri));
if (NS_WARN_IF(NS_FAILED(rv))) { return rv; }
nsCOMPtr<nsIFileURL> dbFileUrl = do_QueryInterface(uri);
if (NS_WARN_IF(!dbFileUrl)) { return NS_ERROR_UNEXPECTED; }
nsAutoCString type;
PersistenceTypeToText(PERSISTENCE_TYPE_DEFAULT, type);
rv = dbFileUrl->SetQuery(
NS_LITERAL_CSTRING("persistenceType=") + type +
NS_LITERAL_CSTRING("&group=") + aQuotaInfo.mGroup +
NS_LITERAL_CSTRING("&origin=") + aQuotaInfo.mOrigin +
NS_LITERAL_CSTRING("&cache=private"));
if (NS_WARN_IF(NS_FAILED(rv))) { return rv; }
nsCOMPtr<mozIStorageService> ss =
do_GetService(MOZ_STORAGE_SERVICE_CONTRACTID);
if (NS_WARN_IF(!ss)) { return NS_ERROR_UNEXPECTED; }
rv = ss->OpenDatabaseWithFileURL(dbFileUrl, getter_AddRefs(conn));
if (rv == NS_ERROR_FILE_CORRUPTED) {
NS_WARNING("Cache database corrupted. Recreating empty database.");
conn = nullptr;
// There is nothing else we can do to recover. Also, this data can
// be deleted by QuotaManager at any time anyways.
rv = WipeDatabase(dbFile, aDBDir);
if (NS_WARN_IF(NS_FAILED(rv))) { return rv; }
rv = ss->OpenDatabaseWithFileURL(dbFileUrl, getter_AddRefs(conn));
}
if (NS_WARN_IF(NS_FAILED(rv))) { return rv; }
// Check the schema to make sure it is not too old.
int32_t schemaVersion = 0;
rv = conn->GetSchemaVersion(&schemaVersion);
if (NS_WARN_IF(NS_FAILED(rv))) { return rv; }
if (schemaVersion > 0 && schemaVersion < db::kFirstShippedSchemaVersion) {
conn = nullptr;
rv = WipeDatabase(dbFile, aDBDir);
if (NS_WARN_IF(NS_FAILED(rv))) { return rv; }
rv = ss->OpenDatabaseWithFileURL(dbFileUrl, getter_AddRefs(conn));
if (NS_WARN_IF(NS_FAILED(rv))) { return rv; }
}
rv = db::InitializeConnection(conn);
if (NS_WARN_IF(NS_FAILED(rv))) { return rv; }
conn.forget(aConnOut);
return rv;
}
nsresult
DBAction::WipeDatabase(nsIFile* aDBFile, nsIFile* aDBDir)
{
nsresult rv = aDBFile->Remove(false);
if (NS_WARN_IF(NS_FAILED(rv))) { return rv; }
// Note, the -wal journal file will be automatically deleted by sqlite when
// the new database is created. No need to explicitly delete it here.
// Delete the morgue as well.
rv = BodyDeleteDir(aDBDir);
if (NS_WARN_IF(NS_FAILED(rv))) { return rv; }
return rv;
}
SyncDBAction::SyncDBAction(Mode aMode)
: DBAction(aMode)
{
}
SyncDBAction::~SyncDBAction()
{
}
void
SyncDBAction::RunWithDBOnTarget(Resolver* aResolver,
const QuotaInfo& aQuotaInfo, nsIFile* aDBDir,
mozIStorageConnection* aConn)
{
MOZ_ASSERT(!NS_IsMainThread());
MOZ_DIAGNOSTIC_ASSERT(aResolver);
MOZ_DIAGNOSTIC_ASSERT(aDBDir);
MOZ_DIAGNOSTIC_ASSERT(aConn);
nsresult rv = RunSyncWithDBOnTarget(aQuotaInfo, aDBDir, aConn);
aResolver->Resolve(rv);
}
} // namespace cache
} // namespace dom
} // namespace mozilla
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