Add m-esr52 at 52.6.0

1 files changed, 231 insertions, 0 deletions

diff --git a/dom/cache/DBAction.cpp b/dom/cache/DBAction.cpp
new file mode 100644
index 000000000..ae009dc10
--- /dev/null
+++ b/dom/cache/DBAction.cpp
@@ -0,0 +1,231 @@
+/* -*- 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