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// 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 <algorithm>
#include "webkit/appcache/appcache.h"
#include "base/logging.h"
#include "base/string_util.h"
#include "webkit/appcache/appcache_group.h"
#include "webkit/appcache/appcache_host.h"
#include "webkit/appcache/appcache_interfaces.h"
#include "webkit/appcache/appcache_service.h"
#include "webkit/appcache/appcache_storage.h"
namespace appcache {
AppCache::AppCache(AppCacheService *service, int64 cache_id)
: cache_id_(cache_id),
owning_group_(NULL),
online_whitelist_all_(false),
is_complete_(false),
service_(service) {
service_->storage()->working_set()->AddCache(this);
}
AppCache::~AppCache() {
DCHECK(associated_hosts_.empty());
if (owning_group_) {
DCHECK(is_complete_);
owning_group_->RemoveCache(this);
}
DCHECK(!owning_group_);
service_->storage()->working_set()->RemoveCache(this);
}
void AppCache::UnassociateHost(AppCacheHost* host) {
associated_hosts_.erase(host);
}
void AppCache::AddEntry(const GURL& url, const AppCacheEntry& entry) {
DCHECK(entries_.find(url) == entries_.end());
entries_.insert(EntryMap::value_type(url, entry));
}
void AppCache::AddOrModifyEntry(const GURL& url, const AppCacheEntry& entry) {
std::pair<EntryMap::iterator, bool> ret =
entries_.insert(EntryMap::value_type(url, entry));
// Entry already exists. Merge the types of the new and existing entries.
if (!ret.second)
ret.first->second.add_types(entry.types());
}
AppCacheEntry* AppCache::GetEntry(const GURL& url) {
EntryMap::iterator it = entries_.find(url);
return (it != entries_.end()) ? &(it->second) : NULL;
}
namespace {
bool SortByLength(
const FallbackNamespace& lhs, const FallbackNamespace& rhs) {
return lhs.first.spec().length() > rhs.first.spec().length();
}
}
void AppCache::InitializeWithManifest(Manifest* manifest) {
DCHECK(manifest);
fallback_namespaces_.swap(manifest->fallback_namespaces);
online_whitelist_namespaces_.swap(manifest->online_whitelist_namespaces);
online_whitelist_all_ = manifest->online_whitelist_all;
// Sort the fallback namespaces by url string length, longest to shortest,
// since longer matches trump when matching a url to a namespace.
std::sort(fallback_namespaces_.begin(), fallback_namespaces_.end(),
SortByLength);
}
bool AppCache::FindResponseForRequest(const GURL& url,
AppCacheEntry* found_entry, AppCacheEntry* found_fallback_entry,
GURL* found_fallback_namespace, bool* found_network_namespace) {
AppCacheEntry* entry = GetEntry(url);
if (entry) {
*found_entry = *entry;
return true;
}
FallbackNamespace* fallback_namespace = FindFallbackNamespace(url);
if (fallback_namespace) {
entry = GetEntry(fallback_namespace->second);
DCHECK(entry);
*found_fallback_entry = *entry;
*found_fallback_namespace = fallback_namespace->first;
return true;
}
*found_network_namespace = IsInNetworkNamespace(url);
return *found_network_namespace;
}
FallbackNamespace* AppCache::FindFallbackNamespace(const GURL& url) {
size_t count = fallback_namespaces_.size();
for (size_t i = 0; i < count; ++i) {
if (StartsWithASCII(
url.spec(), fallback_namespaces_[i].first.spec(), true)) {
return &fallback_namespaces_[i];
}
}
return NULL;
}
bool AppCache::IsInNetworkNamespace(const GURL& url) {
if (online_whitelist_all_)
return true;
// TODO(michaeln): There are certainly better 'prefix matching'
// structures and algorithms that can be applied here and above.
size_t count = online_whitelist_namespaces_.size();
for (size_t i = 0; i < count; ++i) {
if (StartsWithASCII(
url.spec(), online_whitelist_namespaces_[i].spec(), true)) {
return true;
}
}
return false;
}
} // namespace appcache
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