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// Copyright 2015 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 "storage/browser/blob/blob_storage_registry.h"
#include "base/bind.h"
#include "base/callback.h"
#include "base/location.h"
#include "base/logging.h"
#include "base/message_loop/message_loop.h"
#include "base/stl_util.h"
#include "url/gurl.h"
namespace storage {
using BlobState = BlobStorageRegistry::BlobState;
namespace {
// We can't use GURL directly for these hash fragment manipulations
// since it doesn't have specific knowlege of the BlobURL format. GURL
// treats BlobURLs as if they were PathURLs which don't support hash
// fragments.
bool BlobUrlHasRef(const GURL& url) {
return url.spec().find('#') != std::string::npos;
}
GURL ClearBlobUrlRef(const GURL& url) {
size_t hash_pos = url.spec().find('#');
if (hash_pos == std::string::npos)
return url;
return GURL(url.spec().substr(0, hash_pos));
}
} // namespace
BlobStorageRegistry::Entry::Entry(int refcount, BlobState state)
: refcount(refcount), state(state), exceeded_memory(false) {}
BlobStorageRegistry::Entry::~Entry() {}
bool BlobStorageRegistry::Entry::TestAndSetState(BlobState expected,
BlobState set) {
if (state != expected)
return false;
state = set;
return true;
}
BlobStorageRegistry::BlobStorageRegistry() {}
BlobStorageRegistry::~BlobStorageRegistry() {
// Note: We don't bother calling the construction complete callbacks, as we
// are only being destructed at the end of the life of the browser process.
// So it shouldn't matter.
}
BlobStorageRegistry::Entry* BlobStorageRegistry::CreateEntry(
const std::string& uuid) {
DCHECK(!ContainsKey(blob_map_, uuid));
Entry* entry = new Entry(1, BlobState::RESERVED);
blob_map_.add(uuid, make_scoped_ptr(entry));
return entry;
}
bool BlobStorageRegistry::DeleteEntry(const std::string& uuid) {
return blob_map_.erase(uuid) == 1;
}
BlobStorageRegistry::Entry* BlobStorageRegistry::GetEntry(
const std::string& uuid) {
BlobMap::iterator found = blob_map_.find(uuid);
if (found == blob_map_.end())
return nullptr;
return found->second;
}
bool BlobStorageRegistry::CreateUrlMapping(const GURL& blob_url,
const std::string& uuid) {
DCHECK(!BlobUrlHasRef(blob_url));
if (blob_map_.find(uuid) == blob_map_.end() || IsURLMapped(blob_url))
return false;
url_to_uuid_[blob_url] = uuid;
return true;
}
bool BlobStorageRegistry::DeleteURLMapping(const GURL& blob_url,
std::string* uuid) {
DCHECK(!BlobUrlHasRef(blob_url));
URLMap::iterator found = url_to_uuid_.find(blob_url);
if (found == url_to_uuid_.end())
return false;
if (uuid)
uuid->assign(found->second);
url_to_uuid_.erase(found);
return true;
}
bool BlobStorageRegistry::IsURLMapped(const GURL& blob_url) const {
return ContainsKey(url_to_uuid_, blob_url);
}
BlobStorageRegistry::Entry* BlobStorageRegistry::GetEntryFromURL(
const GURL& url,
std::string* uuid) {
URLMap::iterator found =
url_to_uuid_.find(BlobUrlHasRef(url) ? ClearBlobUrlRef(url) : url);
if (found == url_to_uuid_.end())
return nullptr;
Entry* entry = GetEntry(found->second);
if (entry && uuid)
uuid->assign(found->second);
return entry;
}
} // namespace storage
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