content/child/indexed_db/indexed_db_dispatcher.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "content/child/indexed_db/indexed_db_dispatcher.h"
   6
   7 #include <utility>
   8
   9 #include "base/format_macros.h"
  10 #include "base/lazy_instance.h"
  11 #include "base/strings/stringprintf.h"
  12 #include "base/threading/thread_local.h"
  13 #include "content/child/indexed_db/indexed_db_key_builders.h"
  14 #include "content/child/indexed_db/webidbcursor_impl.h"
  15 #include "content/child/indexed_db/webidbdatabase_impl.h"
  16 #include "content/child/thread_safe_sender.h"
  17 #include "content/common/indexed_db/indexed_db_constants.h"
  18 #include "content/common/indexed_db/indexed_db_messages.h"
  19 #include "ipc/ipc_channel.h"
  20 #include "third_party/WebKit/public/platform/WebIDBDatabaseCallbacks.h"
  21 #include "third_party/WebKit/public/platform/WebIDBDatabaseError.h"
  22 #include "third_party/WebKit/public/platform/WebIDBDatabaseException.h"
  23
  24 using blink::WebBlobInfo;
  25 using blink::WebData;
  26 using blink::WebIDBCallbacks;
  27 using blink::WebIDBCursor;
  28 using blink::WebIDBDatabase;
  29 using blink::WebIDBDatabaseCallbacks;
  30 using blink::WebIDBDatabaseError;
  31 using blink::WebIDBKey;
  32 using blink::WebIDBMetadata;
  33 using blink::WebString;
  34 using blink::WebVector;
  35 using base::ThreadLocalPointer;
  36
  37 namespace content {
  38 static base::LazyInstance<ThreadLocalPointer<IndexedDBDispatcher> >::Leaky
  39     g_idb_dispatcher_tls = LAZY_INSTANCE_INITIALIZER;
  40
  41 namespace {
  42
  43 IndexedDBDispatcher* const kHasBeenDeleted =
  44     reinterpret_cast<IndexedDBDispatcher*>(0x1);
  45
  46 }  // unnamed namespace
  47
  48 const size_t kMaxIDBMessageOverhead = 1024 * 1024;  // 1MB; arbitrarily chosen.
  49 const size_t kMaxIDBValueSizeInBytes =
  50     IPC::Channel::kMaximumMessageSize - kMaxIDBMessageOverhead;
  51
  52 IndexedDBDispatcher::IndexedDBDispatcher(ThreadSafeSender* thread_safe_sender)
  53     : thread_safe_sender_(thread_safe_sender) {
  54   g_idb_dispatcher_tls.Pointer()->Set(this);
  55 }
  56
  57 IndexedDBDispatcher::~IndexedDBDispatcher() {
  58   // Clear any pending callbacks - which may result in dispatch requests -
  59   // before marking the dispatcher as deleted.
  60   pending_callbacks_.Clear();
  61   pending_database_callbacks_.Clear();
  62
  63   DCHECK(pending_callbacks_.IsEmpty());
  64   DCHECK(pending_database_callbacks_.IsEmpty());
  65
  66   g_idb_dispatcher_tls.Pointer()->Set(kHasBeenDeleted);
  67 }
  68
  69 IndexedDBDispatcher* IndexedDBDispatcher::ThreadSpecificInstance(
  70     ThreadSafeSender* thread_safe_sender) {
  71   if (g_idb_dispatcher_tls.Pointer()->Get() == kHasBeenDeleted) {
  72     NOTREACHED() << "Re-instantiating TLS IndexedDBDispatcher.";
  73     g_idb_dispatcher_tls.Pointer()->Set(NULL);
  74   }
  75   if (g_idb_dispatcher_tls.Pointer()->Get())
  76     return g_idb_dispatcher_tls.Pointer()->Get();
  77
  78   IndexedDBDispatcher* dispatcher = new IndexedDBDispatcher(thread_safe_sender);
  79   if (WorkerTaskRunner::Instance()->CurrentWorkerId())
  80     WorkerTaskRunner::Instance()->AddStopObserver(dispatcher);
  81   return dispatcher;
  82 }
  83
  84 void IndexedDBDispatcher::OnWorkerRunLoopStopped() { delete this; }
  85
  86 WebIDBMetadata IndexedDBDispatcher::ConvertMetadata(
  87     const IndexedDBDatabaseMetadata& idb_metadata) {
  88   WebIDBMetadata web_metadata;
  89   web_metadata.id = idb_metadata.id;
  90   web_metadata.name = idb_metadata.name;
  91   web_metadata.version = idb_metadata.version;
  92   web_metadata.intVersion = idb_metadata.int_version;
  93   web_metadata.maxObjectStoreId = idb_metadata.max_object_store_id;
  94   web_metadata.objectStores =
  95       WebVector<WebIDBMetadata::ObjectStore>(idb_metadata.object_stores.size());
  96
  97   for (size_t i = 0; i < idb_metadata.object_stores.size(); ++i) {
  98     const IndexedDBObjectStoreMetadata& idb_store_metadata =
  99         idb_metadata.object_stores[i];
 100     WebIDBMetadata::ObjectStore& web_store_metadata =
 101         web_metadata.objectStores[i];
 102
 103     web_store_metadata.id = idb_store_metadata.id;
 104     web_store_metadata.name = idb_store_metadata.name;
 105     web_store_metadata.keyPath =
 106         WebIDBKeyPathBuilder::Build(idb_store_metadata.key_path);
 107     web_store_metadata.autoIncrement = idb_store_metadata.auto_increment;
 108     web_store_metadata.maxIndexId = idb_store_metadata.max_index_id;
 109     web_store_metadata.indexes =
 110         WebVector<WebIDBMetadata::Index>(idb_store_metadata.indexes.size());
 111
 112     for (size_t j = 0; j < idb_store_metadata.indexes.size(); ++j) {
 113       const IndexedDBIndexMetadata& idb_index_metadata =
 114           idb_store_metadata.indexes[j];
 115       WebIDBMetadata::Index& web_index_metadata = web_store_metadata.indexes[j];
 116
 117       web_index_metadata.id = idb_index_metadata.id;
 118       web_index_metadata.name = idb_index_metadata.name;
 119       web_index_metadata.keyPath =
 120           WebIDBKeyPathBuilder::Build(idb_index_metadata.key_path);
 121       web_index_metadata.unique = idb_index_metadata.unique;
 122       web_index_metadata.multiEntry = idb_index_metadata.multi_entry;
 123     }
 124   }
 125
 126   return web_metadata;
 127 }
 128
 129 void IndexedDBDispatcher::OnMessageReceived(const IPC::Message& msg) {
 130   bool handled = true;
 131   IPC_BEGIN_MESSAGE_MAP(IndexedDBDispatcher, msg)
 132     IPC_MESSAGE_HANDLER(IndexedDBMsg_CallbacksSuccessIDBCursor,
 133                         OnSuccessOpenCursor)
 134     IPC_MESSAGE_HANDLER(IndexedDBMsg_CallbacksSuccessCursorAdvance,
 135                         OnSuccessCursorContinue)
 136     IPC_MESSAGE_HANDLER(IndexedDBMsg_CallbacksSuccessCursorContinue,
 137                         OnSuccessCursorContinue)
 138     IPC_MESSAGE_HANDLER(IndexedDBMsg_CallbacksSuccessCursorPrefetch,
 139                         OnSuccessCursorPrefetch)
 140     IPC_MESSAGE_HANDLER(IndexedDBMsg_CallbacksSuccessIDBDatabase,
 141                         OnSuccessIDBDatabase)
 142     IPC_MESSAGE_HANDLER(IndexedDBMsg_CallbacksSuccessIndexedDBKey,
 143                         OnSuccessIndexedDBKey)
 144     IPC_MESSAGE_HANDLER(IndexedDBMsg_CallbacksSuccessStringList,
 145                         OnSuccessStringList)
 146     IPC_MESSAGE_HANDLER(IndexedDBMsg_CallbacksSuccessValue, OnSuccessValue)
 147     IPC_MESSAGE_HANDLER(IndexedDBMsg_CallbacksSuccessInteger, OnSuccessInteger)
 148     IPC_MESSAGE_HANDLER(IndexedDBMsg_CallbacksSuccessUndefined,
 149                         OnSuccessUndefined)
 150     IPC_MESSAGE_HANDLER(IndexedDBMsg_CallbacksError, OnError)
 151     IPC_MESSAGE_HANDLER(IndexedDBMsg_CallbacksIntBlocked, OnIntBlocked)
 152     IPC_MESSAGE_HANDLER(IndexedDBMsg_CallbacksUpgradeNeeded, OnUpgradeNeeded)
 153     IPC_MESSAGE_HANDLER(IndexedDBMsg_DatabaseCallbacksForcedClose,
 154                         OnForcedClose)
 155     IPC_MESSAGE_HANDLER(IndexedDBMsg_DatabaseCallbacksIntVersionChange,
 156                         OnIntVersionChange)
 157     IPC_MESSAGE_HANDLER(IndexedDBMsg_DatabaseCallbacksAbort, OnAbort)
 158     IPC_MESSAGE_HANDLER(IndexedDBMsg_DatabaseCallbacksComplete, OnComplete)
 159     IPC_MESSAGE_UNHANDLED(handled = false)
 160   IPC_END_MESSAGE_MAP()
 161   // If a message gets here, IndexedDBMessageFilter already determined that it
 162   // is an IndexedDB message.
 163   DCHECK(handled) << "Didn't handle a message defined at line "
 164                   << IPC_MESSAGE_ID_LINE(msg.type());
 165 }
 166
 167 bool IndexedDBDispatcher::Send(IPC::Message* msg) {
 168   return thread_safe_sender_->Send(msg);
 169 }
 170
 171 void IndexedDBDispatcher::RequestIDBCursorAdvance(
 172     unsigned long count,
 173     WebIDBCallbacks* callbacks_ptr,
 174     int32 ipc_cursor_id,
 175     int64 transaction_id) {
 176   // Reset all cursor prefetch caches except for this cursor.
 177   ResetCursorPrefetchCaches(transaction_id, ipc_cursor_id);
 178
 179   scoped_ptr<WebIDBCallbacks> callbacks(callbacks_ptr);
 180
 181   int32 ipc_callbacks_id = pending_callbacks_.Add(callbacks.release());
 182   Send(new IndexedDBHostMsg_CursorAdvance(
 183       ipc_cursor_id, CurrentWorkerId(), ipc_callbacks_id, count));
 184 }
 185
 186 void IndexedDBDispatcher::RequestIDBCursorContinue(
 187     const IndexedDBKey& key,
 188     const IndexedDBKey& primary_key,
 189     WebIDBCallbacks* callbacks_ptr,
 190     int32 ipc_cursor_id,
 191     int64 transaction_id) {
 192   // Reset all cursor prefetch caches except for this cursor.
 193   ResetCursorPrefetchCaches(transaction_id, ipc_cursor_id);
 194
 195   scoped_ptr<WebIDBCallbacks> callbacks(callbacks_ptr);
 196
 197   int32 ipc_callbacks_id = pending_callbacks_.Add(callbacks.release());
 198   Send(new IndexedDBHostMsg_CursorContinue(
 199       ipc_cursor_id, CurrentWorkerId(), ipc_callbacks_id, key, primary_key));
 200 }
 201
 202 void IndexedDBDispatcher::RequestIDBCursorPrefetch(
 203     int n,
 204     WebIDBCallbacks* callbacks_ptr,
 205     int32 ipc_cursor_id) {
 206   scoped_ptr<WebIDBCallbacks> callbacks(callbacks_ptr);
 207
 208   int32 ipc_callbacks_id = pending_callbacks_.Add(callbacks.release());
 209   Send(new IndexedDBHostMsg_CursorPrefetch(
 210       ipc_cursor_id, CurrentWorkerId(), ipc_callbacks_id, n));
 211 }
 212
 213 void IndexedDBDispatcher::RequestIDBCursorPrefetchReset(int used_prefetches,
 214                                                         int unused_prefetches,
 215                                                         int32 ipc_cursor_id) {
 216   Send(new IndexedDBHostMsg_CursorPrefetchReset(
 217       ipc_cursor_id, used_prefetches, unused_prefetches));
 218 }
 219
 220 void IndexedDBDispatcher::RequestIDBFactoryOpen(
 221     const base::string16& name,
 222     int64 version,
 223     int64 transaction_id,
 224     WebIDBCallbacks* callbacks_ptr,
 225     WebIDBDatabaseCallbacks* database_callbacks_ptr,
 226     const std::string& database_identifier) {
 227   scoped_ptr<WebIDBCallbacks> callbacks(callbacks_ptr);
 228   scoped_ptr<WebIDBDatabaseCallbacks> database_callbacks(
 229       database_callbacks_ptr);
 230
 231   IndexedDBHostMsg_FactoryOpen_Params params;
 232   params.ipc_thread_id = CurrentWorkerId();
 233   params.ipc_callbacks_id = pending_callbacks_.Add(callbacks.release());
 234   params.ipc_database_callbacks_id =
 235       pending_database_callbacks_.Add(database_callbacks.release());
 236   params.database_identifier = database_identifier;
 237   params.name = name;
 238   params.transaction_id = transaction_id;
 239   params.version = version;
 240   Send(new IndexedDBHostMsg_FactoryOpen(params));
 241 }
 242
 243 void IndexedDBDispatcher::RequestIDBFactoryGetDatabaseNames(
 244     WebIDBCallbacks* callbacks_ptr,
 245     const std::string& database_identifier) {
 246   scoped_ptr<WebIDBCallbacks> callbacks(callbacks_ptr);
 247
 248   IndexedDBHostMsg_FactoryGetDatabaseNames_Params params;
 249   params.ipc_thread_id = CurrentWorkerId();
 250   params.ipc_callbacks_id = pending_callbacks_.Add(callbacks.release());
 251   params.database_identifier = database_identifier;
 252   Send(new IndexedDBHostMsg_FactoryGetDatabaseNames(params));
 253 }
 254
 255 void IndexedDBDispatcher::RequestIDBFactoryDeleteDatabase(
 256     const base::string16& name,
 257     WebIDBCallbacks* callbacks_ptr,
 258     const std::string& database_identifier) {
 259   scoped_ptr<WebIDBCallbacks> callbacks(callbacks_ptr);
 260
 261   IndexedDBHostMsg_FactoryDeleteDatabase_Params params;
 262   params.ipc_thread_id = CurrentWorkerId();
 263   params.ipc_callbacks_id = pending_callbacks_.Add(callbacks.release());
 264   params.database_identifier = database_identifier;
 265   params.name = name;
 266   Send(new IndexedDBHostMsg_FactoryDeleteDatabase(params));
 267 }
 268
 269 void IndexedDBDispatcher::RequestIDBDatabaseClose(
 270     int32 ipc_database_id,
 271     int32 ipc_database_callbacks_id) {
 272   Send(new IndexedDBHostMsg_DatabaseClose(ipc_database_id));
 273   // There won't be pending database callbacks if the transaction was aborted in
 274   // the initial upgradeneeded event handler.
 275   if (pending_database_callbacks_.Lookup(ipc_database_callbacks_id))
 276     pending_database_callbacks_.Remove(ipc_database_callbacks_id);
 277 }
 278
 279 void IndexedDBDispatcher::NotifyIDBDatabaseVersionChangeIgnored(
 280     int32 ipc_database_id) {
 281   Send(new IndexedDBHostMsg_DatabaseVersionChangeIgnored(ipc_database_id));
 282 }
 283
 284 void IndexedDBDispatcher::RequestIDBDatabaseCreateTransaction(
 285     int32 ipc_database_id,
 286     int64 transaction_id,
 287     WebIDBDatabaseCallbacks* database_callbacks_ptr,
 288     WebVector<long long> object_store_ids,
 289     blink::WebIDBTransactionMode mode) {
 290   scoped_ptr<WebIDBDatabaseCallbacks> database_callbacks(
 291       database_callbacks_ptr);
 292   IndexedDBHostMsg_DatabaseCreateTransaction_Params params;
 293   params.ipc_thread_id = CurrentWorkerId();
 294   params.ipc_database_id = ipc_database_id;
 295   params.transaction_id = transaction_id;
 296   params.ipc_database_callbacks_id =
 297       pending_database_callbacks_.Add(database_callbacks.release());
 298   params.object_store_ids
 299       .assign(object_store_ids.data(),
 300               object_store_ids.data() + object_store_ids.size());
 301   params.mode = mode;
 302
 303   Send(new IndexedDBHostMsg_DatabaseCreateTransaction(params));
 304 }
 305
 306 void IndexedDBDispatcher::RequestIDBDatabaseGet(
 307     int32 ipc_database_id,
 308     int64 transaction_id,
 309     int64 object_store_id,
 310     int64 index_id,
 311     const IndexedDBKeyRange& key_range,
 312     bool key_only,
 313     WebIDBCallbacks* callbacks) {
 314   ResetCursorPrefetchCaches(transaction_id, kAllCursors);
 315   IndexedDBHostMsg_DatabaseGet_Params params;
 316   init_params(&params, callbacks);
 317   params.ipc_database_id = ipc_database_id;
 318   params.transaction_id = transaction_id;
 319   params.object_store_id = object_store_id;
 320   params.index_id = index_id;
 321   params.key_range = key_range;
 322   params.key_only = key_only;
 323   Send(new IndexedDBHostMsg_DatabaseGet(params));
 324 }
 325
 326 void IndexedDBDispatcher::RequestIDBDatabasePut(
 327     int32 ipc_database_id,
 328     int64 transaction_id,
 329     int64 object_store_id,
 330     const WebData& value,
 331     const blink::WebVector<WebBlobInfo>& web_blob_info,
 332     const IndexedDBKey& key,
 333     blink::WebIDBPutMode put_mode,
 334     WebIDBCallbacks* callbacks,
 335     const WebVector<long long>& index_ids,
 336     const WebVector<WebVector<WebIDBKey> >& index_keys) {
 337   if (value.size() + key.size_estimate() > kMaxIDBValueSizeInBytes) {
 338     callbacks->onError(WebIDBDatabaseError(
 339         blink::WebIDBDatabaseExceptionUnknownError,
 340         WebString::fromUTF8(base::StringPrintf(
 341             "The serialized value is too large"
 342             " (size=%" PRIuS " bytes, max=%" PRIuS " bytes).",
 343             value.size(),
 344             kMaxIDBValueSizeInBytes).c_str())));
 345     return;
 346   }
 347
 348   ResetCursorPrefetchCaches(transaction_id, kAllCursors);
 349   IndexedDBHostMsg_DatabasePut_Params params;
 350   init_params(&params, callbacks);
 351   params.ipc_database_id = ipc_database_id;
 352   params.transaction_id = transaction_id;
 353   params.object_store_id = object_store_id;
 354
 355   params.value.bits.assign(value.data(), value.data() + value.size());
 356   params.key = key;
 357   params.put_mode = put_mode;
 358
 359   DCHECK_EQ(index_ids.size(), index_keys.size());
 360   params.index_keys.resize(index_ids.size());
 361   for (size_t i = 0, len = index_ids.size(); i < len; ++i) {
 362     params.index_keys[i].first = index_ids[i];
 363     params.index_keys[i].second.resize(index_keys[i].size());
 364     for (size_t j = 0; j < index_keys[i].size(); ++j) {
 365       params.index_keys[i].second[j] =
 366           IndexedDBKey(IndexedDBKeyBuilder::Build(index_keys[i][j]));
 367     }
 368   }
 369
 370   params.value.blob_or_file_info.resize(web_blob_info.size());
 371   for (size_t i = 0; i < web_blob_info.size(); ++i) {
 372     const WebBlobInfo& info = web_blob_info[i];
 373     IndexedDBMsg_BlobOrFileInfo& blob_or_file_info =
 374         params.value.blob_or_file_info[i];
 375     blob_or_file_info.is_file = info.isFile();
 376     if (info.isFile()) {
 377       blob_or_file_info.file_path = info.filePath();
 378       blob_or_file_info.file_name = info.fileName();
 379       blob_or_file_info.last_modified = info.lastModified();
 380     }
 381     blob_or_file_info.size = info.size();
 382     blob_or_file_info.uuid = info.uuid().latin1();
 383     DCHECK(blob_or_file_info.uuid.size());
 384     blob_or_file_info.mime_type = info.type();
 385   }
 386
 387   Send(new IndexedDBHostMsg_DatabasePut(params));
 388 }
 389
 390 void IndexedDBDispatcher::RequestIDBDatabaseOpenCursor(
 391     int32 ipc_database_id,
 392     int64 transaction_id,
 393     int64 object_store_id,
 394     int64 index_id,
 395     const IndexedDBKeyRange& key_range,
 396     blink::WebIDBCursorDirection direction,
 397     bool key_only,
 398     blink::WebIDBTaskType task_type,
 399     WebIDBCallbacks* callbacks) {
 400   ResetCursorPrefetchCaches(transaction_id, kAllCursors);
 401   IndexedDBHostMsg_DatabaseOpenCursor_Params params;
 402   init_params(&params, callbacks);
 403   params.ipc_database_id = ipc_database_id;
 404   params.transaction_id = transaction_id;
 405   params.object_store_id = object_store_id;
 406   params.index_id = index_id;
 407   params.key_range = key_range;
 408   params.direction = direction;
 409   params.key_only = key_only;
 410   params.task_type = task_type;
 411   Send(new IndexedDBHostMsg_DatabaseOpenCursor(params));
 412
 413   DCHECK(cursor_transaction_ids_.find(params.ipc_callbacks_id) ==
 414          cursor_transaction_ids_.end());
 415   cursor_transaction_ids_[params.ipc_callbacks_id] = transaction_id;
 416 }
 417
 418 void IndexedDBDispatcher::RequestIDBDatabaseCount(
 419     int32 ipc_database_id,
 420     int64 transaction_id,
 421     int64 object_store_id,
 422     int64 index_id,
 423     const IndexedDBKeyRange& key_range,
 424     WebIDBCallbacks* callbacks) {
 425   ResetCursorPrefetchCaches(transaction_id, kAllCursors);
 426   IndexedDBHostMsg_DatabaseCount_Params params;
 427   init_params(&params, callbacks);
 428   params.ipc_database_id = ipc_database_id;
 429   params.transaction_id = transaction_id;
 430   params.object_store_id = object_store_id;
 431   params.index_id = index_id;
 432   params.key_range = key_range;
 433   Send(new IndexedDBHostMsg_DatabaseCount(params));
 434 }
 435
 436 void IndexedDBDispatcher::RequestIDBDatabaseDeleteRange(
 437     int32 ipc_database_id,
 438     int64 transaction_id,
 439     int64 object_store_id,
 440     const IndexedDBKeyRange& key_range,
 441     WebIDBCallbacks* callbacks) {
 442   ResetCursorPrefetchCaches(transaction_id, kAllCursors);
 443   IndexedDBHostMsg_DatabaseDeleteRange_Params params;
 444   init_params(&params, callbacks);
 445   params.ipc_database_id = ipc_database_id;
 446   params.transaction_id = transaction_id;
 447   params.object_store_id = object_store_id;
 448   params.key_range = key_range;
 449   Send(new IndexedDBHostMsg_DatabaseDeleteRange(params));
 450 }
 451
 452 void IndexedDBDispatcher::RequestIDBDatabaseClear(
 453     int32 ipc_database_id,
 454     int64 transaction_id,
 455     int64 object_store_id,
 456     WebIDBCallbacks* callbacks_ptr) {
 457   ResetCursorPrefetchCaches(transaction_id, kAllCursors);
 458   scoped_ptr<WebIDBCallbacks> callbacks(callbacks_ptr);
 459   int32 ipc_callbacks_id = pending_callbacks_.Add(callbacks.release());
 460   Send(new IndexedDBHostMsg_DatabaseClear(CurrentWorkerId(),
 461                                           ipc_callbacks_id,
 462                                           ipc_database_id,
 463                                           transaction_id,
 464                                           object_store_id));
 465 }
 466
 467 void IndexedDBDispatcher::CursorDestroyed(int32 ipc_cursor_id) {
 468   cursors_.erase(ipc_cursor_id);
 469 }
 470
 471 void IndexedDBDispatcher::DatabaseDestroyed(int32 ipc_database_id) {
 472   DCHECK_EQ(databases_.count(ipc_database_id), 1u);
 473   databases_.erase(ipc_database_id);
 474 }
 475
 476 void IndexedDBDispatcher::OnSuccessIDBDatabase(
 477     int32 ipc_thread_id,
 478     int32 ipc_callbacks_id,
 479     int32 ipc_database_callbacks_id,
 480     int32 ipc_object_id,
 481     const IndexedDBDatabaseMetadata& idb_metadata) {
 482   DCHECK_EQ(ipc_thread_id, CurrentWorkerId());
 483   WebIDBCallbacks* callbacks = pending_callbacks_.Lookup(ipc_callbacks_id);
 484   if (!callbacks)
 485     return;
 486   WebIDBMetadata metadata(ConvertMetadata(idb_metadata));
 487   // If an upgrade was performed, count will be non-zero.
 488   WebIDBDatabase* database = NULL;
 489
 490   // Back-end will send kNoDatabase if it was already sent in OnUpgradeNeeded.
 491   // May already be deleted and removed from the table, but do not recreate..
 492   if (ipc_object_id != kNoDatabase) {
 493     DCHECK(!databases_.count(ipc_object_id));
 494     database = databases_[ipc_object_id] = new WebIDBDatabaseImpl(
 495         ipc_object_id, ipc_database_callbacks_id, thread_safe_sender_.get());
 496   }
 497
 498   callbacks->onSuccess(database, metadata);
 499   pending_callbacks_.Remove(ipc_callbacks_id);
 500 }
 501
 502 void IndexedDBDispatcher::OnSuccessIndexedDBKey(int32 ipc_thread_id,
 503                                                 int32 ipc_callbacks_id,
 504                                                 const IndexedDBKey& key) {
 505   DCHECK_EQ(ipc_thread_id, CurrentWorkerId());
 506   WebIDBCallbacks* callbacks = pending_callbacks_.Lookup(ipc_callbacks_id);
 507   if (!callbacks)
 508     return;
 509   callbacks->onSuccess(WebIDBKeyBuilder::Build(key));
 510   pending_callbacks_.Remove(ipc_callbacks_id);
 511 }
 512
 513 void IndexedDBDispatcher::OnSuccessStringList(
 514     int32 ipc_thread_id,
 515     int32 ipc_callbacks_id,
 516     const std::vector<base::string16>& value) {
 517   DCHECK_EQ(ipc_thread_id, CurrentWorkerId());
 518   WebIDBCallbacks* callbacks = pending_callbacks_.Lookup(ipc_callbacks_id);
 519   if (!callbacks)
 520     return;
 521   callbacks->onSuccess(WebVector<WebString>(value));
 522   pending_callbacks_.Remove(ipc_callbacks_id);
 523 }
 524
 525 static void PrepareWebValueAndBlobInfo(
 526     const IndexedDBMsg_Value& value,
 527     WebData* web_value,
 528     blink::WebVector<WebBlobInfo>* web_blob_info) {
 529   if (value.bits.empty())
 530     return;
 531
 532   web_value->assign(&*value.bits.begin(), value.bits.size());
 533   blink::WebVector<WebBlobInfo> local_blob_info(value.blob_or_file_info.size());
 534   for (size_t i = 0; i < value.blob_or_file_info.size(); ++i) {
 535     const IndexedDBMsg_BlobOrFileInfo& info = value.blob_or_file_info[i];
 536     if (info.is_file) {
 537       local_blob_info[i] = WebBlobInfo(WebString::fromUTF8(info.uuid.c_str()),
 538                                        info.file_path,
 539                                        info.file_name,
 540                                        info.mime_type,
 541                                        info.last_modified,
 542                                        info.size);
 543     } else {
 544       local_blob_info[i] = WebBlobInfo(
 545           WebString::fromUTF8(info.uuid.c_str()), info.mime_type, info.size);
 546     }
 547   }
 548   web_blob_info->swap(local_blob_info);
 549 }
 550
 551 void IndexedDBDispatcher::OnSuccessValue(
 552     const IndexedDBMsg_CallbacksSuccessValue_Params& params) {
 553   DCHECK_EQ(params.ipc_thread_id, CurrentWorkerId());
 554   WebIDBCallbacks* callbacks =
 555       pending_callbacks_.Lookup(params.ipc_callbacks_id);
 556   if (!callbacks)
 557     return;
 558   WebData web_value;
 559   WebVector<WebBlobInfo> web_blob_info;
 560   PrepareWebValueAndBlobInfo(params.value, &web_value, &web_blob_info);
 561   if (params.value.primary_key.IsValid()) {
 562     callbacks->onSuccess(web_value, web_blob_info,
 563                          WebIDBKeyBuilder::Build(params.value.primary_key),
 564                          WebIDBKeyPathBuilder::Build(params.value.key_path));
 565   } else {
 566     callbacks->onSuccess(web_value, web_blob_info);
 567     cursor_transaction_ids_.erase(params.ipc_callbacks_id);
 568   }
 569   pending_callbacks_.Remove(params.ipc_callbacks_id);
 570 }
 571
 572 void IndexedDBDispatcher::OnSuccessInteger(int32 ipc_thread_id,
 573                                            int32 ipc_callbacks_id,
 574                                            int64 value) {
 575   DCHECK_EQ(ipc_thread_id, CurrentWorkerId());
 576   WebIDBCallbacks* callbacks = pending_callbacks_.Lookup(ipc_callbacks_id);
 577   if (!callbacks)
 578     return;
 579   callbacks->onSuccess(value);
 580   pending_callbacks_.Remove(ipc_callbacks_id);
 581 }
 582
 583 void IndexedDBDispatcher::OnSuccessUndefined(int32 ipc_thread_id,
 584                                              int32 ipc_callbacks_id) {
 585   DCHECK_EQ(ipc_thread_id, CurrentWorkerId());
 586   WebIDBCallbacks* callbacks = pending_callbacks_.Lookup(ipc_callbacks_id);
 587   if (!callbacks)
 588     return;
 589   callbacks->onSuccess();
 590   pending_callbacks_.Remove(ipc_callbacks_id);
 591 }
 592
 593 void IndexedDBDispatcher::OnSuccessOpenCursor(
 594     const IndexedDBMsg_CallbacksSuccessIDBCursor_Params& p) {
 595   DCHECK_EQ(p.ipc_thread_id, CurrentWorkerId());
 596   int32 ipc_callbacks_id = p.ipc_callbacks_id;
 597   int32 ipc_object_id = p.ipc_cursor_id;
 598   const IndexedDBKey& key = p.key;
 599   const IndexedDBKey& primary_key = p.primary_key;
 600   WebData web_value;
 601   WebVector<WebBlobInfo> web_blob_info;
 602   PrepareWebValueAndBlobInfo(p.value, &web_value, &web_blob_info);
 603
 604   DCHECK(cursor_transaction_ids_.find(ipc_callbacks_id) !=
 605          cursor_transaction_ids_.end());
 606   int64 transaction_id = cursor_transaction_ids_[ipc_callbacks_id];
 607   cursor_transaction_ids_.erase(ipc_callbacks_id);
 608
 609   WebIDBCallbacks* callbacks = pending_callbacks_.Lookup(ipc_callbacks_id);
 610   if (!callbacks)
 611     return;
 612
 613   WebIDBCursorImpl* cursor = new WebIDBCursorImpl(
 614       ipc_object_id, transaction_id, thread_safe_sender_.get());
 615   cursors_[ipc_object_id] = cursor;
 616   callbacks->onSuccess(cursor,
 617                        WebIDBKeyBuilder::Build(key),
 618                        WebIDBKeyBuilder::Build(primary_key),
 619                        web_value,
 620                        web_blob_info);
 621
 622   pending_callbacks_.Remove(ipc_callbacks_id);
 623 }
 624
 625 void IndexedDBDispatcher::OnSuccessCursorContinue(
 626     const IndexedDBMsg_CallbacksSuccessCursorContinue_Params& p) {
 627   DCHECK_EQ(p.ipc_thread_id, CurrentWorkerId());
 628   int32 ipc_callbacks_id = p.ipc_callbacks_id;
 629   int32 ipc_cursor_id = p.ipc_cursor_id;
 630   const IndexedDBKey& key = p.key;
 631   const IndexedDBKey& primary_key = p.primary_key;
 632
 633   if (cursors_.find(ipc_cursor_id) == cursors_.end())
 634     return;
 635
 636   WebIDBCallbacks* callbacks = pending_callbacks_.Lookup(ipc_callbacks_id);
 637   if (!callbacks)
 638     return;
 639
 640   WebData web_value;
 641   WebVector<WebBlobInfo> web_blob_info;
 642   PrepareWebValueAndBlobInfo(p.value, &web_value, &web_blob_info);
 643   callbacks->onSuccess(WebIDBKeyBuilder::Build(key),
 644                        WebIDBKeyBuilder::Build(primary_key),
 645                        web_value,
 646                        web_blob_info);
 647
 648   pending_callbacks_.Remove(ipc_callbacks_id);
 649 }
 650
 651 void IndexedDBDispatcher::OnSuccessCursorPrefetch(
 652     const IndexedDBMsg_CallbacksSuccessCursorPrefetch_Params& p) {
 653   DCHECK_EQ(p.ipc_thread_id, CurrentWorkerId());
 654   int32 ipc_callbacks_id = p.ipc_callbacks_id;
 655   int32 ipc_cursor_id = p.ipc_cursor_id;
 656   const std::vector<IndexedDBKey>& keys = p.keys;
 657   const std::vector<IndexedDBKey>& primary_keys = p.primary_keys;
 658   std::vector<WebData> values(p.values.size());
 659   std::vector<WebVector<WebBlobInfo>> blob_infos(p.values.size());
 660   for (size_t i = 0; i < p.values.size(); ++i)
 661     PrepareWebValueAndBlobInfo(p.values[i], &values[i], &blob_infos[i]);
 662   std::map<int32, WebIDBCursorImpl*>::const_iterator cur_iter =
 663       cursors_.find(ipc_cursor_id);
 664   if (cur_iter == cursors_.end())
 665     return;
 666
 667   cur_iter->second->SetPrefetchData(keys, primary_keys, values, blob_infos);
 668
 669   WebIDBCallbacks* callbacks = pending_callbacks_.Lookup(ipc_callbacks_id);
 670   DCHECK(callbacks);
 671   cur_iter->second->CachedContinue(callbacks);
 672   pending_callbacks_.Remove(ipc_callbacks_id);
 673 }
 674
 675 void IndexedDBDispatcher::OnIntBlocked(int32 ipc_thread_id,
 676                                        int32 ipc_callbacks_id,
 677                                        int64 existing_version) {
 678   DCHECK_EQ(ipc_thread_id, CurrentWorkerId());
 679   WebIDBCallbacks* callbacks = pending_callbacks_.Lookup(ipc_callbacks_id);
 680   DCHECK(callbacks);
 681   callbacks->onBlocked(existing_version);
 682 }
 683
 684 void IndexedDBDispatcher::OnUpgradeNeeded(
 685     const IndexedDBMsg_CallbacksUpgradeNeeded_Params& p) {
 686   DCHECK_EQ(p.ipc_thread_id, CurrentWorkerId());
 687   WebIDBCallbacks* callbacks = pending_callbacks_.Lookup(p.ipc_callbacks_id);
 688   DCHECK(callbacks);
 689   WebIDBMetadata metadata(ConvertMetadata(p.idb_metadata));
 690   DCHECK(!databases_.count(p.ipc_database_id));
 691   databases_[p.ipc_database_id] =
 692       new WebIDBDatabaseImpl(p.ipc_database_id,
 693                              p.ipc_database_callbacks_id,
 694                              thread_safe_sender_.get());
 695   callbacks->onUpgradeNeeded(
 696       p.old_version,
 697       databases_[p.ipc_database_id],
 698       metadata,
 699       static_cast<blink::WebIDBDataLoss>(p.data_loss),
 700       WebString::fromUTF8(p.data_loss_message));
 701 }
 702
 703 void IndexedDBDispatcher::OnError(int32 ipc_thread_id,
 704                                   int32 ipc_callbacks_id,
 705                                   int code,
 706                                   const base::string16& message) {
 707   DCHECK_EQ(ipc_thread_id, CurrentWorkerId());
 708   WebIDBCallbacks* callbacks = pending_callbacks_.Lookup(ipc_callbacks_id);
 709   if (!callbacks)
 710     return;
 711   if (message.empty())
 712     callbacks->onError(WebIDBDatabaseError(code));
 713   else
 714     callbacks->onError(WebIDBDatabaseError(code, message));
 715   pending_callbacks_.Remove(ipc_callbacks_id);
 716   cursor_transaction_ids_.erase(ipc_callbacks_id);
 717 }
 718
 719 void IndexedDBDispatcher::OnAbort(int32 ipc_thread_id,
 720                                   int32 ipc_database_callbacks_id,
 721                                   int64 transaction_id,
 722                                   int code,
 723                                   const base::string16& message) {
 724   DCHECK_EQ(ipc_thread_id, CurrentWorkerId());
 725   WebIDBDatabaseCallbacks* callbacks =
 726       pending_database_callbacks_.Lookup(ipc_database_callbacks_id);
 727   if (!callbacks)
 728     return;
 729   if (message.empty())
 730     callbacks->onAbort(transaction_id, WebIDBDatabaseError(code));
 731   else
 732     callbacks->onAbort(transaction_id, WebIDBDatabaseError(code, message));
 733 }
 734
 735 void IndexedDBDispatcher::OnComplete(int32 ipc_thread_id,
 736                                      int32 ipc_database_callbacks_id,
 737                                      int64 transaction_id) {
 738   DCHECK_EQ(ipc_thread_id, CurrentWorkerId());
 739   WebIDBDatabaseCallbacks* callbacks =
 740       pending_database_callbacks_.Lookup(ipc_database_callbacks_id);
 741   if (!callbacks)
 742     return;
 743   callbacks->onComplete(transaction_id);
 744 }
 745
 746 void IndexedDBDispatcher::OnForcedClose(int32 ipc_thread_id,
 747                                         int32 ipc_database_callbacks_id) {
 748   DCHECK_EQ(ipc_thread_id, CurrentWorkerId());
 749   WebIDBDatabaseCallbacks* callbacks =
 750       pending_database_callbacks_.Lookup(ipc_database_callbacks_id);
 751   if (!callbacks)
 752     return;
 753   callbacks->onForcedClose();
 754 }
 755
 756 void IndexedDBDispatcher::OnIntVersionChange(int32 ipc_thread_id,
 757                                              int32 ipc_database_callbacks_id,
 758                                              int64 old_version,
 759                                              int64 new_version) {
 760   DCHECK_EQ(ipc_thread_id, CurrentWorkerId());
 761   WebIDBDatabaseCallbacks* callbacks =
 762       pending_database_callbacks_.Lookup(ipc_database_callbacks_id);
 763   // callbacks would be NULL if a versionchange event is received after close
 764   // has been called.
 765   if (!callbacks)
 766     return;
 767   callbacks->onVersionChange(old_version, new_version);
 768 }
 769
 770 void IndexedDBDispatcher::ResetCursorPrefetchCaches(
 771     int64 transaction_id,
 772     int32 ipc_exception_cursor_id) {
 773   typedef std::map<int32, WebIDBCursorImpl*>::iterator Iterator;
 774   for (Iterator i = cursors_.begin(); i != cursors_.end(); ++i) {
 775     if (i->first == ipc_exception_cursor_id ||
 776         i->second->transaction_id() != transaction_id)
 777       continue;
 778     i->second->ResetPrefetchCache();
 779   }
 780 }
 781
 782 }  // namespace content