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_CallbacksSuccessValueWithKey,
 148                         OnSuccessValueWithKey)
 149     IPC_MESSAGE_HANDLER(IndexedDBMsg_CallbacksSuccessInteger, OnSuccessInteger)
 150     IPC_MESSAGE_HANDLER(IndexedDBMsg_CallbacksSuccessUndefined,
 151                         OnSuccessUndefined)
 152     IPC_MESSAGE_HANDLER(IndexedDBMsg_CallbacksError, OnError)
 153     IPC_MESSAGE_HANDLER(IndexedDBMsg_CallbacksIntBlocked, OnIntBlocked)
 154     IPC_MESSAGE_HANDLER(IndexedDBMsg_CallbacksUpgradeNeeded, OnUpgradeNeeded)
 155     IPC_MESSAGE_HANDLER(IndexedDBMsg_DatabaseCallbacksForcedClose,
 156                         OnForcedClose)
 157     IPC_MESSAGE_HANDLER(IndexedDBMsg_DatabaseCallbacksIntVersionChange,
 158                         OnIntVersionChange)
 159     IPC_MESSAGE_HANDLER(IndexedDBMsg_DatabaseCallbacksAbort, OnAbort)
 160     IPC_MESSAGE_HANDLER(IndexedDBMsg_DatabaseCallbacksComplete, OnComplete)
 161     IPC_MESSAGE_UNHANDLED(handled = false)
 162   IPC_END_MESSAGE_MAP()
 163   // If a message gets here, IndexedDBMessageFilter already determined that it
 164   // is an IndexedDB message.
 165   DCHECK(handled) << "Didn't handle a message defined at line "
 166                   << IPC_MESSAGE_ID_LINE(msg.type());
 167 }
 168
 169 bool IndexedDBDispatcher::Send(IPC::Message* msg) {
 170   return thread_safe_sender_->Send(msg);
 171 }
 172
 173 void IndexedDBDispatcher::RequestIDBCursorAdvance(
 174     unsigned long count,
 175     WebIDBCallbacks* callbacks_ptr,
 176     int32 ipc_cursor_id,
 177     int64 transaction_id) {
 178   // Reset all cursor prefetch caches except for this cursor.
 179   ResetCursorPrefetchCaches(transaction_id, ipc_cursor_id);
 180
 181   scoped_ptr<WebIDBCallbacks> callbacks(callbacks_ptr);
 182
 183   int32 ipc_callbacks_id = pending_callbacks_.Add(callbacks.release());
 184   Send(new IndexedDBHostMsg_CursorAdvance(
 185       ipc_cursor_id, CurrentWorkerId(), ipc_callbacks_id, count));
 186 }
 187
 188 void IndexedDBDispatcher::RequestIDBCursorContinue(
 189     const IndexedDBKey& key,
 190     const IndexedDBKey& primary_key,
 191     WebIDBCallbacks* callbacks_ptr,
 192     int32 ipc_cursor_id,
 193     int64 transaction_id) {
 194   // Reset all cursor prefetch caches except for this cursor.
 195   ResetCursorPrefetchCaches(transaction_id, ipc_cursor_id);
 196
 197   scoped_ptr<WebIDBCallbacks> callbacks(callbacks_ptr);
 198
 199   int32 ipc_callbacks_id = pending_callbacks_.Add(callbacks.release());
 200   Send(new IndexedDBHostMsg_CursorContinue(
 201       ipc_cursor_id, CurrentWorkerId(), ipc_callbacks_id, key, primary_key));
 202 }
 203
 204 void IndexedDBDispatcher::RequestIDBCursorPrefetch(
 205     int n,
 206     WebIDBCallbacks* callbacks_ptr,
 207     int32 ipc_cursor_id) {
 208   scoped_ptr<WebIDBCallbacks> callbacks(callbacks_ptr);
 209
 210   int32 ipc_callbacks_id = pending_callbacks_.Add(callbacks.release());
 211   Send(new IndexedDBHostMsg_CursorPrefetch(
 212       ipc_cursor_id, CurrentWorkerId(), ipc_callbacks_id, n));
 213 }
 214
 215 void IndexedDBDispatcher::RequestIDBCursorPrefetchReset(int used_prefetches,
 216                                                         int unused_prefetches,
 217                                                         int32 ipc_cursor_id) {
 218   Send(new IndexedDBHostMsg_CursorPrefetchReset(
 219       ipc_cursor_id, used_prefetches, unused_prefetches));
 220 }
 221
 222 void IndexedDBDispatcher::RequestIDBFactoryOpen(
 223     const base::string16& name,
 224     int64 version,
 225     int64 transaction_id,
 226     WebIDBCallbacks* callbacks_ptr,
 227     WebIDBDatabaseCallbacks* database_callbacks_ptr,
 228     const std::string& database_identifier) {
 229   scoped_ptr<WebIDBCallbacks> callbacks(callbacks_ptr);
 230   scoped_ptr<WebIDBDatabaseCallbacks> database_callbacks(
 231       database_callbacks_ptr);
 232
 233   IndexedDBHostMsg_FactoryOpen_Params params;
 234   params.ipc_thread_id = CurrentWorkerId();
 235   params.ipc_callbacks_id = pending_callbacks_.Add(callbacks.release());
 236   params.ipc_database_callbacks_id =
 237       pending_database_callbacks_.Add(database_callbacks.release());
 238   params.database_identifier = database_identifier;
 239   params.name = name;
 240   params.transaction_id = transaction_id;
 241   params.version = version;
 242   Send(new IndexedDBHostMsg_FactoryOpen(params));
 243 }
 244
 245 void IndexedDBDispatcher::RequestIDBFactoryGetDatabaseNames(
 246     WebIDBCallbacks* callbacks_ptr,
 247     const std::string& database_identifier) {
 248   scoped_ptr<WebIDBCallbacks> callbacks(callbacks_ptr);
 249
 250   IndexedDBHostMsg_FactoryGetDatabaseNames_Params params;
 251   params.ipc_thread_id = CurrentWorkerId();
 252   params.ipc_callbacks_id = pending_callbacks_.Add(callbacks.release());
 253   params.database_identifier = database_identifier;
 254   Send(new IndexedDBHostMsg_FactoryGetDatabaseNames(params));
 255 }
 256
 257 void IndexedDBDispatcher::RequestIDBFactoryDeleteDatabase(
 258     const base::string16& name,
 259     WebIDBCallbacks* callbacks_ptr,
 260     const std::string& database_identifier) {
 261   scoped_ptr<WebIDBCallbacks> callbacks(callbacks_ptr);
 262
 263   IndexedDBHostMsg_FactoryDeleteDatabase_Params params;
 264   params.ipc_thread_id = CurrentWorkerId();
 265   params.ipc_callbacks_id = pending_callbacks_.Add(callbacks.release());
 266   params.database_identifier = database_identifier;
 267   params.name = name;
 268   Send(new IndexedDBHostMsg_FactoryDeleteDatabase(params));
 269 }
 270
 271 void IndexedDBDispatcher::RequestIDBDatabaseClose(
 272     int32 ipc_database_id,
 273     int32 ipc_database_callbacks_id) {
 274   Send(new IndexedDBHostMsg_DatabaseClose(ipc_database_id));
 275   // There won't be pending database callbacks if the transaction was aborted in
 276   // the initial upgradeneeded event handler.
 277   if (pending_database_callbacks_.Lookup(ipc_database_callbacks_id))
 278     pending_database_callbacks_.Remove(ipc_database_callbacks_id);
 279 }
 280
 281 void IndexedDBDispatcher::NotifyIDBDatabaseVersionChangeIgnored(
 282     int32 ipc_database_id) {
 283   Send(new IndexedDBHostMsg_DatabaseVersionChangeIgnored(ipc_database_id));
 284 }
 285
 286 void IndexedDBDispatcher::RequestIDBDatabaseCreateTransaction(
 287     int32 ipc_database_id,
 288     int64 transaction_id,
 289     WebIDBDatabaseCallbacks* database_callbacks_ptr,
 290     WebVector<long long> object_store_ids,
 291     blink::WebIDBTransactionMode mode) {
 292   scoped_ptr<WebIDBDatabaseCallbacks> database_callbacks(
 293       database_callbacks_ptr);
 294   IndexedDBHostMsg_DatabaseCreateTransaction_Params params;
 295   params.ipc_thread_id = CurrentWorkerId();
 296   params.ipc_database_id = ipc_database_id;
 297   params.transaction_id = transaction_id;
 298   params.ipc_database_callbacks_id =
 299       pending_database_callbacks_.Add(database_callbacks.release());
 300   params.object_store_ids
 301       .assign(object_store_ids.data(),
 302               object_store_ids.data() + object_store_ids.size());
 303   params.mode = mode;
 304
 305   Send(new IndexedDBHostMsg_DatabaseCreateTransaction(params));
 306 }
 307
 308 void IndexedDBDispatcher::RequestIDBDatabaseGet(
 309     int32 ipc_database_id,
 310     int64 transaction_id,
 311     int64 object_store_id,
 312     int64 index_id,
 313     const IndexedDBKeyRange& key_range,
 314     bool key_only,
 315     WebIDBCallbacks* callbacks) {
 316   ResetCursorPrefetchCaches(transaction_id, kAllCursors);
 317   IndexedDBHostMsg_DatabaseGet_Params params;
 318   init_params(&params, callbacks);
 319   params.ipc_database_id = ipc_database_id;
 320   params.transaction_id = transaction_id;
 321   params.object_store_id = object_store_id;
 322   params.index_id = index_id;
 323   params.key_range = key_range;
 324   params.key_only = key_only;
 325   Send(new IndexedDBHostMsg_DatabaseGet(params));
 326 }
 327
 328 void IndexedDBDispatcher::RequestIDBDatabasePut(
 329     int32 ipc_database_id,
 330     int64 transaction_id,
 331     int64 object_store_id,
 332     const WebData& value,
 333     const blink::WebVector<WebBlobInfo>& web_blob_info,
 334     const IndexedDBKey& key,
 335     blink::WebIDBPutMode put_mode,
 336     WebIDBCallbacks* callbacks,
 337     const WebVector<long long>& index_ids,
 338     const WebVector<WebVector<WebIDBKey> >& index_keys) {
 339   if (value.size() + key.size_estimate() > kMaxIDBValueSizeInBytes) {
 340     callbacks->onError(WebIDBDatabaseError(
 341         blink::WebIDBDatabaseExceptionUnknownError,
 342         WebString::fromUTF8(base::StringPrintf(
 343             "The serialized value is too large"
 344             " (size=%" PRIuS " bytes, max=%" PRIuS " bytes).",
 345             value.size(),
 346             kMaxIDBValueSizeInBytes).c_str())));
 347     return;
 348   }
 349
 350   ResetCursorPrefetchCaches(transaction_id, kAllCursors);
 351   IndexedDBHostMsg_DatabasePut_Params params;
 352   init_params(&params, callbacks);
 353   params.ipc_database_id = ipc_database_id;
 354   params.transaction_id = transaction_id;
 355   params.object_store_id = object_store_id;
 356
 357   params.value.bits.assign(value.data(), value.data() + value.size());
 358   params.key = key;
 359   params.put_mode = put_mode;
 360
 361   DCHECK_EQ(index_ids.size(), index_keys.size());
 362   params.index_keys.resize(index_ids.size());
 363   for (size_t i = 0, len = index_ids.size(); i < len; ++i) {
 364     params.index_keys[i].first = index_ids[i];
 365     params.index_keys[i].second.resize(index_keys[i].size());
 366     for (size_t j = 0; j < index_keys[i].size(); ++j) {
 367       params.index_keys[i].second[j] =
 368           IndexedDBKey(IndexedDBKeyBuilder::Build(index_keys[i][j]));
 369     }
 370   }
 371
 372   params.value.blob_or_file_info.resize(web_blob_info.size());
 373   for (size_t i = 0; i < web_blob_info.size(); ++i) {
 374     const WebBlobInfo& info = web_blob_info[i];
 375     IndexedDBMsg_BlobOrFileInfo& blob_or_file_info =
 376         params.value.blob_or_file_info[i];
 377     blob_or_file_info.is_file = info.isFile();
 378     if (info.isFile()) {
 379       blob_or_file_info.file_path = info.filePath();
 380       blob_or_file_info.file_name = info.fileName();
 381       blob_or_file_info.last_modified = info.lastModified();
 382     }
 383     blob_or_file_info.size = info.size();
 384     blob_or_file_info.uuid = info.uuid().latin1();
 385     DCHECK(blob_or_file_info.uuid.size());
 386     blob_or_file_info.mime_type = info.type();
 387   }
 388
 389   Send(new IndexedDBHostMsg_DatabasePut(params));
 390 }
 391
 392 void IndexedDBDispatcher::RequestIDBDatabaseOpenCursor(
 393     int32 ipc_database_id,
 394     int64 transaction_id,
 395     int64 object_store_id,
 396     int64 index_id,
 397     const IndexedDBKeyRange& key_range,
 398     blink::WebIDBCursorDirection direction,
 399     bool key_only,
 400     blink::WebIDBTaskType task_type,
 401     WebIDBCallbacks* callbacks) {
 402   ResetCursorPrefetchCaches(transaction_id, kAllCursors);
 403   IndexedDBHostMsg_DatabaseOpenCursor_Params params;
 404   init_params(&params, callbacks);
 405   params.ipc_database_id = ipc_database_id;
 406   params.transaction_id = transaction_id;
 407   params.object_store_id = object_store_id;
 408   params.index_id = index_id;
 409   params.key_range = key_range;
 410   params.direction = direction;
 411   params.key_only = key_only;
 412   params.task_type = task_type;
 413   Send(new IndexedDBHostMsg_DatabaseOpenCursor(params));
 414
 415   DCHECK(cursor_transaction_ids_.find(params.ipc_callbacks_id) ==
 416          cursor_transaction_ids_.end());
 417   cursor_transaction_ids_[params.ipc_callbacks_id] = transaction_id;
 418 }
 419
 420 void IndexedDBDispatcher::RequestIDBDatabaseCount(
 421     int32 ipc_database_id,
 422     int64 transaction_id,
 423     int64 object_store_id,
 424     int64 index_id,
 425     const IndexedDBKeyRange& key_range,
 426     WebIDBCallbacks* callbacks) {
 427   ResetCursorPrefetchCaches(transaction_id, kAllCursors);
 428   IndexedDBHostMsg_DatabaseCount_Params params;
 429   init_params(&params, callbacks);
 430   params.ipc_database_id = ipc_database_id;
 431   params.transaction_id = transaction_id;
 432   params.object_store_id = object_store_id;
 433   params.index_id = index_id;
 434   params.key_range = key_range;
 435   Send(new IndexedDBHostMsg_DatabaseCount(params));
 436 }
 437
 438 void IndexedDBDispatcher::RequestIDBDatabaseDeleteRange(
 439     int32 ipc_database_id,
 440     int64 transaction_id,
 441     int64 object_store_id,
 442     const IndexedDBKeyRange& key_range,
 443     WebIDBCallbacks* callbacks) {
 444   ResetCursorPrefetchCaches(transaction_id, kAllCursors);
 445   IndexedDBHostMsg_DatabaseDeleteRange_Params params;
 446   init_params(&params, callbacks);
 447   params.ipc_database_id = ipc_database_id;
 448   params.transaction_id = transaction_id;
 449   params.object_store_id = object_store_id;
 450   params.key_range = key_range;
 451   Send(new IndexedDBHostMsg_DatabaseDeleteRange(params));
 452 }
 453
 454 void IndexedDBDispatcher::RequestIDBDatabaseClear(
 455     int32 ipc_database_id,
 456     int64 transaction_id,
 457     int64 object_store_id,
 458     WebIDBCallbacks* callbacks_ptr) {
 459   ResetCursorPrefetchCaches(transaction_id, kAllCursors);
 460   scoped_ptr<WebIDBCallbacks> callbacks(callbacks_ptr);
 461   int32 ipc_callbacks_id = pending_callbacks_.Add(callbacks.release());
 462   Send(new IndexedDBHostMsg_DatabaseClear(CurrentWorkerId(),
 463                                           ipc_callbacks_id,
 464                                           ipc_database_id,
 465                                           transaction_id,
 466                                           object_store_id));
 467 }
 468
 469 void IndexedDBDispatcher::CursorDestroyed(int32 ipc_cursor_id) {
 470   cursors_.erase(ipc_cursor_id);
 471 }
 472
 473 void IndexedDBDispatcher::DatabaseDestroyed(int32 ipc_database_id) {
 474   DCHECK_EQ(databases_.count(ipc_database_id), 1u);
 475   databases_.erase(ipc_database_id);
 476 }
 477
 478 void IndexedDBDispatcher::OnSuccessIDBDatabase(
 479     int32 ipc_thread_id,
 480     int32 ipc_callbacks_id,
 481     int32 ipc_database_callbacks_id,
 482     int32 ipc_object_id,
 483     const IndexedDBDatabaseMetadata& idb_metadata) {
 484   DCHECK_EQ(ipc_thread_id, CurrentWorkerId());
 485   WebIDBCallbacks* callbacks = pending_callbacks_.Lookup(ipc_callbacks_id);
 486   if (!callbacks)
 487     return;
 488   WebIDBMetadata metadata(ConvertMetadata(idb_metadata));
 489   // If an upgrade was performed, count will be non-zero.
 490   WebIDBDatabase* database = NULL;
 491
 492   // Back-end will send kNoDatabase if it was already sent in OnUpgradeNeeded.
 493   // May already be deleted and removed from the table, but do not recreate..
 494   if (ipc_object_id != kNoDatabase) {
 495     DCHECK(!databases_.count(ipc_object_id));
 496     database = databases_[ipc_object_id] = new WebIDBDatabaseImpl(
 497         ipc_object_id, ipc_database_callbacks_id, thread_safe_sender_.get());
 498   }
 499
 500   callbacks->onSuccess(database, metadata);
 501   pending_callbacks_.Remove(ipc_callbacks_id);
 502 }
 503
 504 void IndexedDBDispatcher::OnSuccessIndexedDBKey(int32 ipc_thread_id,
 505                                                 int32 ipc_callbacks_id,
 506                                                 const IndexedDBKey& key) {
 507   DCHECK_EQ(ipc_thread_id, CurrentWorkerId());
 508   WebIDBCallbacks* callbacks = pending_callbacks_.Lookup(ipc_callbacks_id);
 509   if (!callbacks)
 510     return;
 511   callbacks->onSuccess(WebIDBKeyBuilder::Build(key));
 512   pending_callbacks_.Remove(ipc_callbacks_id);
 513 }
 514
 515 void IndexedDBDispatcher::OnSuccessStringList(
 516     int32 ipc_thread_id,
 517     int32 ipc_callbacks_id,
 518     const std::vector<base::string16>& value) {
 519   DCHECK_EQ(ipc_thread_id, CurrentWorkerId());
 520   WebIDBCallbacks* callbacks = pending_callbacks_.Lookup(ipc_callbacks_id);
 521   if (!callbacks)
 522     return;
 523   callbacks->onSuccess(WebVector<WebString>(value));
 524   pending_callbacks_.Remove(ipc_callbacks_id);
 525 }
 526
 527 static void PrepareWebValueAndBlobInfo(
 528     const IndexedDBMsg_Value& value,
 529     WebData* web_value,
 530     blink::WebVector<WebBlobInfo>* web_blob_info) {
 531   if (value.bits.empty())
 532     return;
 533
 534   web_value->assign(&*value.bits.begin(), value.bits.size());
 535   blink::WebVector<WebBlobInfo> local_blob_info(value.blob_or_file_info.size());
 536   for (size_t i = 0; i < value.blob_or_file_info.size(); ++i) {
 537     const IndexedDBMsg_BlobOrFileInfo& info = value.blob_or_file_info[i];
 538     if (info.is_file) {
 539       local_blob_info[i] = WebBlobInfo(WebString::fromUTF8(info.uuid.c_str()),
 540                                        info.file_path,
 541                                        info.file_name,
 542                                        info.mime_type,
 543                                        info.last_modified,
 544                                        info.size);
 545     } else {
 546       local_blob_info[i] = WebBlobInfo(
 547           WebString::fromUTF8(info.uuid.c_str()), info.mime_type, info.size);
 548     }
 549   }
 550   web_blob_info->swap(local_blob_info);
 551 }
 552
 553 void IndexedDBDispatcher::OnSuccessValue(
 554     const IndexedDBMsg_CallbacksSuccessValue_Params& params) {
 555   DCHECK_EQ(params.ipc_thread_id, CurrentWorkerId());
 556   WebIDBCallbacks* callbacks =
 557       pending_callbacks_.Lookup(params.ipc_callbacks_id);
 558   if (!callbacks)
 559     return;
 560   WebData web_value;
 561   WebVector<WebBlobInfo> web_blob_info;
 562   PrepareWebValueAndBlobInfo(params.value, &web_value, &web_blob_info);
 563   callbacks->onSuccess(web_value, web_blob_info);
 564   pending_callbacks_.Remove(params.ipc_callbacks_id);
 565   cursor_transaction_ids_.erase(params.ipc_callbacks_id);
 566 }
 567
 568 void IndexedDBDispatcher::OnSuccessValueWithKey(
 569     const IndexedDBMsg_CallbacksSuccessValueWithKey_Params& params) {
 570   DCHECK_EQ(params.ipc_thread_id, CurrentWorkerId());
 571   WebIDBCallbacks* callbacks =
 572       pending_callbacks_.Lookup(params.ipc_callbacks_id);
 573   if (!callbacks)
 574     return;
 575   WebData web_value;
 576   WebVector<WebBlobInfo> web_blob_info;
 577   PrepareWebValueAndBlobInfo(params.value, &web_value, &web_blob_info);
 578   callbacks->onSuccess(web_value,
 579                        web_blob_info,
 580                        WebIDBKeyBuilder::Build(params.primary_key),
 581                        WebIDBKeyPathBuilder::Build(params.key_path));
 582   pending_callbacks_.Remove(params.ipc_callbacks_id);
 583 }
 584
 585 void IndexedDBDispatcher::OnSuccessInteger(int32 ipc_thread_id,
 586                                            int32 ipc_callbacks_id,
 587                                            int64 value) {
 588   DCHECK_EQ(ipc_thread_id, CurrentWorkerId());
 589   WebIDBCallbacks* callbacks = pending_callbacks_.Lookup(ipc_callbacks_id);
 590   if (!callbacks)
 591     return;
 592   callbacks->onSuccess(value);
 593   pending_callbacks_.Remove(ipc_callbacks_id);
 594 }
 595
 596 void IndexedDBDispatcher::OnSuccessUndefined(int32 ipc_thread_id,
 597                                              int32 ipc_callbacks_id) {
 598   DCHECK_EQ(ipc_thread_id, CurrentWorkerId());
 599   WebIDBCallbacks* callbacks = pending_callbacks_.Lookup(ipc_callbacks_id);
 600   if (!callbacks)
 601     return;
 602   callbacks->onSuccess();
 603   pending_callbacks_.Remove(ipc_callbacks_id);
 604 }
 605
 606 void IndexedDBDispatcher::OnSuccessOpenCursor(
 607     const IndexedDBMsg_CallbacksSuccessIDBCursor_Params& p) {
 608   DCHECK_EQ(p.ipc_thread_id, CurrentWorkerId());
 609   int32 ipc_callbacks_id = p.ipc_callbacks_id;
 610   int32 ipc_object_id = p.ipc_cursor_id;
 611   const IndexedDBKey& key = p.key;
 612   const IndexedDBKey& primary_key = p.primary_key;
 613   WebData web_value;
 614   WebVector<WebBlobInfo> web_blob_info;
 615   PrepareWebValueAndBlobInfo(p.value, &web_value, &web_blob_info);
 616
 617   DCHECK(cursor_transaction_ids_.find(ipc_callbacks_id) !=
 618          cursor_transaction_ids_.end());
 619   int64 transaction_id = cursor_transaction_ids_[ipc_callbacks_id];
 620   cursor_transaction_ids_.erase(ipc_callbacks_id);
 621
 622   WebIDBCallbacks* callbacks = pending_callbacks_.Lookup(ipc_callbacks_id);
 623   if (!callbacks)
 624     return;
 625
 626   WebIDBCursorImpl* cursor = new WebIDBCursorImpl(
 627       ipc_object_id, transaction_id, thread_safe_sender_.get());
 628   cursors_[ipc_object_id] = cursor;
 629   callbacks->onSuccess(cursor,
 630                        WebIDBKeyBuilder::Build(key),
 631                        WebIDBKeyBuilder::Build(primary_key),
 632                        web_value,
 633                        web_blob_info);
 634
 635   pending_callbacks_.Remove(ipc_callbacks_id);
 636 }
 637
 638 void IndexedDBDispatcher::OnSuccessCursorContinue(
 639     const IndexedDBMsg_CallbacksSuccessCursorContinue_Params& p) {
 640   DCHECK_EQ(p.ipc_thread_id, CurrentWorkerId());
 641   int32 ipc_callbacks_id = p.ipc_callbacks_id;
 642   int32 ipc_cursor_id = p.ipc_cursor_id;
 643   const IndexedDBKey& key = p.key;
 644   const IndexedDBKey& primary_key = p.primary_key;
 645
 646   if (cursors_.find(ipc_cursor_id) == cursors_.end())
 647     return;
 648
 649   WebIDBCallbacks* callbacks = pending_callbacks_.Lookup(ipc_callbacks_id);
 650   if (!callbacks)
 651     return;
 652
 653   WebData web_value;
 654   WebVector<WebBlobInfo> web_blob_info;
 655   PrepareWebValueAndBlobInfo(p.value, &web_value, &web_blob_info);
 656   callbacks->onSuccess(WebIDBKeyBuilder::Build(key),
 657                        WebIDBKeyBuilder::Build(primary_key),
 658                        web_value,
 659                        web_blob_info);
 660
 661   pending_callbacks_.Remove(ipc_callbacks_id);
 662 }
 663
 664 void IndexedDBDispatcher::OnSuccessCursorPrefetch(
 665     const IndexedDBMsg_CallbacksSuccessCursorPrefetch_Params& p) {
 666   DCHECK_EQ(p.ipc_thread_id, CurrentWorkerId());
 667   int32 ipc_callbacks_id = p.ipc_callbacks_id;
 668   int32 ipc_cursor_id = p.ipc_cursor_id;
 669   const std::vector<IndexedDBKey>& keys = p.keys;
 670   const std::vector<IndexedDBKey>& primary_keys = p.primary_keys;
 671   std::vector<WebData> values(p.values.size());
 672   std::vector<WebVector<WebBlobInfo>> blob_infos(p.values.size());
 673   for (size_t i = 0; i < p.values.size(); ++i)
 674     PrepareWebValueAndBlobInfo(p.values[i], &values[i], &blob_infos[i]);
 675   std::map<int32, WebIDBCursorImpl*>::const_iterator cur_iter =
 676       cursors_.find(ipc_cursor_id);
 677   if (cur_iter == cursors_.end())
 678     return;
 679
 680   cur_iter->second->SetPrefetchData(keys, primary_keys, values, blob_infos);
 681
 682   WebIDBCallbacks* callbacks = pending_callbacks_.Lookup(ipc_callbacks_id);
 683   DCHECK(callbacks);
 684   cur_iter->second->CachedContinue(callbacks);
 685   pending_callbacks_.Remove(ipc_callbacks_id);
 686 }
 687
 688 void IndexedDBDispatcher::OnIntBlocked(int32 ipc_thread_id,
 689                                        int32 ipc_callbacks_id,
 690                                        int64 existing_version) {
 691   DCHECK_EQ(ipc_thread_id, CurrentWorkerId());
 692   WebIDBCallbacks* callbacks = pending_callbacks_.Lookup(ipc_callbacks_id);
 693   DCHECK(callbacks);
 694   callbacks->onBlocked(existing_version);
 695 }
 696
 697 void IndexedDBDispatcher::OnUpgradeNeeded(
 698     const IndexedDBMsg_CallbacksUpgradeNeeded_Params& p) {
 699   DCHECK_EQ(p.ipc_thread_id, CurrentWorkerId());
 700   WebIDBCallbacks* callbacks = pending_callbacks_.Lookup(p.ipc_callbacks_id);
 701   DCHECK(callbacks);
 702   WebIDBMetadata metadata(ConvertMetadata(p.idb_metadata));
 703   DCHECK(!databases_.count(p.ipc_database_id));
 704   databases_[p.ipc_database_id] =
 705       new WebIDBDatabaseImpl(p.ipc_database_id,
 706                              p.ipc_database_callbacks_id,
 707                              thread_safe_sender_.get());
 708   callbacks->onUpgradeNeeded(
 709       p.old_version,
 710       databases_[p.ipc_database_id],
 711       metadata,
 712       static_cast<blink::WebIDBDataLoss>(p.data_loss),
 713       WebString::fromUTF8(p.data_loss_message));
 714 }
 715
 716 void IndexedDBDispatcher::OnError(int32 ipc_thread_id,
 717                                   int32 ipc_callbacks_id,
 718                                   int code,
 719                                   const base::string16& message) {
 720   DCHECK_EQ(ipc_thread_id, CurrentWorkerId());
 721   WebIDBCallbacks* callbacks = pending_callbacks_.Lookup(ipc_callbacks_id);
 722   if (!callbacks)
 723     return;
 724   if (message.empty())
 725     callbacks->onError(WebIDBDatabaseError(code));
 726   else
 727     callbacks->onError(WebIDBDatabaseError(code, message));
 728   pending_callbacks_.Remove(ipc_callbacks_id);
 729   cursor_transaction_ids_.erase(ipc_callbacks_id);
 730 }
 731
 732 void IndexedDBDispatcher::OnAbort(int32 ipc_thread_id,
 733                                   int32 ipc_database_callbacks_id,
 734                                   int64 transaction_id,
 735                                   int code,
 736                                   const base::string16& message) {
 737   DCHECK_EQ(ipc_thread_id, CurrentWorkerId());
 738   WebIDBDatabaseCallbacks* callbacks =
 739       pending_database_callbacks_.Lookup(ipc_database_callbacks_id);
 740   if (!callbacks)
 741     return;
 742   if (message.empty())
 743     callbacks->onAbort(transaction_id, WebIDBDatabaseError(code));
 744   else
 745     callbacks->onAbort(transaction_id, WebIDBDatabaseError(code, message));
 746 }
 747
 748 void IndexedDBDispatcher::OnComplete(int32 ipc_thread_id,
 749                                      int32 ipc_database_callbacks_id,
 750                                      int64 transaction_id) {
 751   DCHECK_EQ(ipc_thread_id, CurrentWorkerId());
 752   WebIDBDatabaseCallbacks* callbacks =
 753       pending_database_callbacks_.Lookup(ipc_database_callbacks_id);
 754   if (!callbacks)
 755     return;
 756   callbacks->onComplete(transaction_id);
 757 }
 758
 759 void IndexedDBDispatcher::OnForcedClose(int32 ipc_thread_id,
 760                                         int32 ipc_database_callbacks_id) {
 761   DCHECK_EQ(ipc_thread_id, CurrentWorkerId());
 762   WebIDBDatabaseCallbacks* callbacks =
 763       pending_database_callbacks_.Lookup(ipc_database_callbacks_id);
 764   if (!callbacks)
 765     return;
 766   callbacks->onForcedClose();
 767 }
 768
 769 void IndexedDBDispatcher::OnIntVersionChange(int32 ipc_thread_id,
 770                                              int32 ipc_database_callbacks_id,
 771                                              int64 old_version,
 772                                              int64 new_version) {
 773   DCHECK_EQ(ipc_thread_id, CurrentWorkerId());
 774   WebIDBDatabaseCallbacks* callbacks =
 775       pending_database_callbacks_.Lookup(ipc_database_callbacks_id);
 776   // callbacks would be NULL if a versionchange event is received after close
 777   // has been called.
 778   if (!callbacks)
 779     return;
 780   callbacks->onVersionChange(old_version, new_version);
 781 }
 782
 783 void IndexedDBDispatcher::ResetCursorPrefetchCaches(
 784     int64 transaction_id,
 785     int32 ipc_exception_cursor_id) {
 786   typedef std::map<int32, WebIDBCursorImpl*>::iterator Iterator;
 787   for (Iterator i = cursors_.begin(); i != cursors_.end(); ++i) {
 788     if (i->first == ipc_exception_cursor_id ||
 789         i->second->transaction_id() != transaction_id)
 790       continue;
 791     i->second->ResetPrefetchCache();
 792   }
 793 }
 794
 795 }  // namespace content