AppCacheResponse storage implementation

* classes AppCacheResponseReader and AppCacheResponseWriter
* also implements AppCacheStorage.LoadResponseInfo()
* using a memory-backed disk_cache for now, so not really on disk yet

TEST=appcache_response_unittest.cc
BUG=none


Review URL: http://codereview.chromium.org/269062

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@29670 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 38 insertions, 0 deletions

diff --git a/webkit/appcache/appcache_storage.cc b/webkit/appcache/appcache_storage.cc
new file mode 100644
index 0000000..b1fc5c4
--- /dev/null
+++ b/webkit/appcache/appcache_storage.cc
@@ -0,0 +1,38 @@
+// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "webkit/appcache/appcache_storage.h"
+
+#include "base/stl_util-inl.h"
+
+namespace appcache {
+
+AppCacheStorage::AppCacheStorage(AppCacheService* service)
+    : last_cache_id_(kUnitializedId), last_group_id_(kUnitializedId),
+      last_entry_id_(kUnitializedId), last_response_id_(kUnitializedId),
+      service_(service)  {
+}
+
+AppCacheStorage::~AppCacheStorage() {
+  STLDeleteValues(&pending_info_loads_);
+  DCHECK(delegate_references_.empty());
+}
+
+void AppCacheStorage::LoadResponseInfo(
+    const GURL& manifest_url, int64 id, Delegate* delegate) {
+  AppCacheResponseInfo* info = working_set_.GetResponseInfo(id);
+  if (info) {
+    delegate->OnResponseInfoLoaded(info, id);
+    return;
+  }
+  ResponseInfoLoadTask* info_load =
+      GetOrCreateResponseInfoLoadTask(manifest_url, id);
+  DCHECK(manifest_url == info_load->manifest_url());
+  DCHECK(id == info_load->response_id());
+  info_load->AddDelegate(GetOrCreateDelegateReference(delegate));
+  info_load->StartIfNeeded();
+}
+
+}  // namespace appcache
+