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