cobalt/h5vcc/h5vcc_storage.cc - cobalt - Git at Google

 // Copyright 2015 The Cobalt Authors. All Rights Reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.

 #include <algorithm>
 #include <memory>
 #include <string>
 #include <utility>
 #include <vector>

 #include "base/files/file_util.h"
 #include "base/values.h"
 #include "cobalt/cache/cache.h"
 #include "cobalt/h5vcc/h5vcc_storage.h"
 #include "cobalt/persistent_storage/persistent_settings.h"
 #include "cobalt/storage/storage_manager.h"
 #include "net/base/completion_once_callback.h"
 #include "net/disk_cache/cobalt/cobalt_backend_impl.h"
 #include "net/disk_cache/cobalt/resource_type.h"
 #include "net/http/http_cache.h"
 #include "net/http/http_transaction_factory.h"

 #include "starboard/common/file.h"
 #include "starboard/common/string.h"

 namespace cobalt {
 namespace h5vcc {

 namespace {

 const char kTestFileName[] = "cache_test_file.json";

 const uint32 kWriteBufferSize = 1024 * 1024;

 const uint32 kReadBufferSize = 1024 * 1024;

 H5vccStorageWriteTestResponse WriteTestResponse(std::string error = "",
                                                 uint32 bytes_written = 0) {
   H5vccStorageWriteTestResponse response;
   response.set_error(error);
   response.set_bytes_written(bytes_written);
   return response;
 }

 H5vccStorageVerifyTestResponse VerifyTestResponse(std::string error = "",
                                                   bool verified = false,
                                                   uint32 bytes_read = 0) {
   H5vccStorageVerifyTestResponse response;
   response.set_error(error);
   response.set_verified(verified);
   response.set_bytes_read(bytes_read);
   return response;
 }

 H5vccStorageSetQuotaResponse SetQuotaResponse(std::string error = "",
                                               bool success = false) {
   H5vccStorageSetQuotaResponse response;
   response.set_success(success);
   response.set_error(error);
   return response;
 }

 void ClearCacheHelper(disk_cache::Backend* backend) {
   backend->DoomAllEntries(base::DoNothing());
 }

 void ClearCacheOfTypeHelper(disk_cache::ResourceType type,
                             disk_cache::CobaltBackendImpl* backend) {
   backend->DoomAllEntriesOfType(type, base::DoNothing());
 }

 }  // namespace

 H5vccStorage::H5vccStorage(
     network::NetworkModule* network_module,
     persistent_storage::PersistentSettings* persistent_settings)
     : network_module_(network_module),
       persistent_settings_(persistent_settings) {
   http_cache_ = nullptr;
   cache_backend_ = nullptr;
   if (network_module == nullptr) {
     return;
   }
   auto url_request_context = network_module_->url_request_context();
   if (url_request_context->using_http_cache()) {
     http_cache_ = url_request_context->http_transaction_factory()->GetCache();
   }
 }

 void H5vccStorage::ClearCookies() {
   net::CookieStore* cookie_store =
       network_module_->url_request_context()->cookie_store();
   auto* cookie_monster = static_cast<net::CookieMonster*>(cookie_store);
   network_module_->task_runner()->PostBlockingTask(
       FROM_HERE,
       base::Bind(&net::CookieMonster::DeleteAllMatchingInfoAsync,
                  base::Unretained(cookie_monster), net::CookieDeletionInfo(),
                  base::Passed(net::CookieStore::DeleteCallback())));
 }

 void H5vccStorage::Flush(const base::Optional<bool>& sync) {
   if (sync.value_or(false) == true) {
     DLOG(WARNING) << "Synchronous flush is not supported.";
   }

   network_module_->storage_manager()->FlushNow(base::Closure());
 }

 bool H5vccStorage::GetCookiesEnabled() {
   return network_module_->network_delegate()->cookies_enabled();
 }

 void H5vccStorage::SetCookiesEnabled(bool enabled) {
   network_module_->network_delegate()->set_cookies_enabled(enabled);
 }

 H5vccStorageWriteTestResponse H5vccStorage::WriteTest(uint32 test_size,
                                                       std::string test_string) {
   // Get cache_dir path.
   std::vector<char> cache_dir(kSbFileMaxPath + 1, 0);
   SbSystemGetPath(kSbSystemPathCacheDirectory, cache_dir.data(),
                   kSbFileMaxPath);

   // Delete the contents of cache_dir.
   starboard::SbFileDeleteRecursive(cache_dir.data(), true);

   // Try to Create the test_file.
   std::string test_file_path =
       std::string(cache_dir.data()) + kSbFileSepString + kTestFileName;
   SbFileError test_file_error;
   starboard::ScopedFile test_file(test_file_path.c_str(),
                                   kSbFileOpenAlways | kSbFileWrite, NULL,
                                   &test_file_error);

   if (test_file_error != kSbFileOk) {
     return WriteTestResponse(
         starboard::FormatString("SbFileError: %d while opening ScopedFile: %s",
                                 test_file_error, test_file_path.c_str()));
   }

   // Repeatedly write test_string to test_size bytes of write_buffer.
   std::string write_buf;
   int iterations = test_size / test_string.length();
   for (int i = 0; i < iterations; ++i) {
     write_buf.append(test_string);
   }
   write_buf.append(test_string.substr(0, test_size % test_string.length()));

   // Incremental Writes of test_data, copies SbWriteAll, using a maximum
   // kWriteBufferSize per write.
   uint32 total_bytes_written = 0;

   do {
     auto bytes_written = test_file.Write(
         write_buf.data() + total_bytes_written,
         std::min(kWriteBufferSize, test_size - total_bytes_written));
     if (bytes_written <= 0) {
       SbFileDelete(test_file_path.c_str());
       return WriteTestResponse("SbWrite -1 return value error");
     }
     total_bytes_written += bytes_written;
   } while (total_bytes_written < test_size);

   test_file.Flush();

   return WriteTestResponse("", total_bytes_written);
 }

 H5vccStorageVerifyTestResponse H5vccStorage::VerifyTest(
     uint32 test_size, std::string test_string) {
   std::vector<char> cache_dir(kSbFileMaxPath + 1, 0);
   SbSystemGetPath(kSbSystemPathCacheDirectory, cache_dir.data(),
                   kSbFileMaxPath);

   std::string test_file_path =
       std::string(cache_dir.data()) + kSbFileSepString + kTestFileName;
   SbFileError test_file_error;
   starboard::ScopedFile test_file(test_file_path.c_str(),
                                   kSbFileOpenOnly | kSbFileRead, NULL,
                                   &test_file_error);

   if (test_file_error != kSbFileOk) {
     return VerifyTestResponse(
         starboard::FormatString("SbFileError: %d while opening ScopedFile: %s",
                                 test_file_error, test_file_path.c_str()));
   }

   // Incremental Reads of test_data, copies SbReadAll, using a maximum
   // kReadBufferSize per write.
   uint32 total_bytes_read = 0;

   do {
     char read_buf[kReadBufferSize];
     auto bytes_read = test_file.Read(
         read_buf, std::min(kReadBufferSize, test_size - total_bytes_read));
     if (bytes_read <= 0) {
       SbFileDelete(test_file_path.c_str());
       return VerifyTestResponse("SbRead -1 return value error");
     }

     // Verify read_buf equivalent to a repeated test_string.
     for (auto i = 0; i < bytes_read; ++i) {
       if (read_buf[i] !=
           test_string[(total_bytes_read + i) % test_string.size()]) {
         return VerifyTestResponse(
             "File test data does not match with test data string");
       }
     }

     total_bytes_read += bytes_read;
   } while (total_bytes_read < test_size);

   if (total_bytes_read != test_size) {
     SbFileDelete(test_file_path.c_str());
     return VerifyTestResponse(
         "File test data size does not match kTestDataSize");
   }

   SbFileDelete(test_file_path.c_str());
   return VerifyTestResponse("", true, total_bytes_read);
 }

 H5vccStorageSetQuotaResponse H5vccStorage::SetQuota(
     H5vccStorageResourceTypeQuotaBytesDictionary quota) {
   if (!quota.has_other() || !quota.has_html() || !quota.has_css() ||
       !quota.has_image() || !quota.has_font() || !quota.has_splash() ||
       !quota.has_uncompiled_js() || !quota.has_compiled_js() ||
       !quota.has_cache_api()) {
     return SetQuotaResponse(
         "H5vccStorageResourceTypeQuotaBytesDictionary input parameter missing "
         "required fields.");
   }

   if (quota.other() < 0 || quota.html() < 0 || quota.css() < 0 ||
       quota.image() < 0 || quota.font() < 0 || quota.splash() < 0 ||
       quota.uncompiled_js() < 0 || quota.compiled_js() < 0 ||
       quota.cache_api() < 0) {
     return SetQuotaResponse(
         "H5vccStorageResourceTypeQuotaBytesDictionary input parameter fields "
         "cannot have a negative value.");
   }

   auto quota_total = quota.other() + quota.html() + quota.css() +
                      quota.image() + quota.font() + quota.splash() +
                      quota.uncompiled_js() + quota.compiled_js() +
                      quota.cache_api();

   uint32_t max_quota_size = 24 * 1024 * 1024;
 #if SB_API_VERSION >= 14
   max_quota_size = kSbMaxSystemPathCacheDirectorySize;
 #endif
   // Assume the non-http-cache memory in kSbSystemPathCacheDirectory
   // is less than 1 mb and subtract this from the max_quota_size.
   max_quota_size -= (1 << 20);

   if (quota_total != max_quota_size) {
     return SetQuotaResponse(starboard::FormatString(
         "H5vccStorageResourceTypeQuotaDictionary input parameter field values "
         "sum (%d) is not equal to the max cache size (%d).",
         quota_total, max_quota_size));
   }

   ValidatedCacheBackend();

   // Write to persistent storage with the new quota values.
   SetAndSaveQuotaForBackend(disk_cache::kOther,
                             static_cast<uint32_t>(quota.other()));
   SetAndSaveQuotaForBackend(disk_cache::kHTML,
                             static_cast<uint32_t>(quota.html()));
   SetAndSaveQuotaForBackend(disk_cache::kCSS,
                             static_cast<uint32_t>(quota.css()));
   SetAndSaveQuotaForBackend(disk_cache::kImage,
                             static_cast<uint32_t>(quota.image()));
   SetAndSaveQuotaForBackend(disk_cache::kFont,
                             static_cast<uint32_t>(quota.font()));
   SetAndSaveQuotaForBackend(disk_cache::kSplashScreen,
                             static_cast<uint32_t>(quota.splash()));
   SetAndSaveQuotaForBackend(disk_cache::kUncompiledScript,
                             static_cast<uint32_t>(quota.uncompiled_js()));
   SetAndSaveQuotaForBackend(disk_cache::kCompiledScript,
                             static_cast<uint32_t>(quota.compiled_js()));
   SetAndSaveQuotaForBackend(disk_cache::kCacheApi,
                             static_cast<uint32_t>(quota.cache_api()));
   return SetQuotaResponse("", true);
 }

 void H5vccStorage::SetAndSaveQuotaForBackend(disk_cache::ResourceType type,
                                              uint32_t bytes) {
   if (cache_backend_) {
     cache_backend_->UpdateSizes(type, bytes);

     if (bytes == 0) {
       network_module_->task_runner()->PostTask(
           FROM_HERE, base::Bind(&ClearCacheOfTypeHelper, type,
                                 base::Unretained(cache_backend_)));
     }
   }
   cobalt::cache::Cache::GetInstance()->Resize(type, bytes);
 }

 H5vccStorageResourceTypeQuotaBytesDictionary H5vccStorage::GetQuota() {
   // Return persistent storage quota values.
   H5vccStorageResourceTypeQuotaBytesDictionary quota;
   if (!ValidatedCacheBackend()) {
     return quota;
   }

   quota.set_other(cache_backend_->GetQuota(disk_cache::kOther));
   quota.set_html(cache_backend_->GetQuota(disk_cache::kHTML));
   quota.set_css(cache_backend_->GetQuota(disk_cache::kCSS));
   quota.set_image(cache_backend_->GetQuota(disk_cache::kImage));
   quota.set_font(cache_backend_->GetQuota(disk_cache::kFont));
   quota.set_splash(cache_backend_->GetQuota(disk_cache::kSplashScreen));
   quota.set_uncompiled_js(
       cache_backend_->GetQuota(disk_cache::kUncompiledScript));
   quota.set_compiled_js(
       cobalt::cache::Cache::GetInstance()
           ->GetMaxCacheStorageInBytes(disk_cache::kCompiledScript)
           .value());
   quota.set_cache_api(cache_backend_->GetQuota(disk_cache::kCacheApi));

   uint32_t max_quota_size = 24 * 1024 * 1024;
 #if SB_API_VERSION >= 14
   max_quota_size = kSbMaxSystemPathCacheDirectorySize;
 #endif
   // Assume the non-http-cache memory in kSbSystemPathCacheDirectory
   // is less than 1 mb and subtract this from the max_quota_size.
   max_quota_size -= (1 << 20);

   quota.set_total(max_quota_size);

   return quota;
 }

 void H5vccStorage::EnableCache() {
   persistent_settings_->SetPersistentSetting(
       disk_cache::kCacheEnabledPersistentSettingsKey,
       std::make_unique<base::Value>(true));

   cobalt::cache::Cache::GetInstance()->set_enabled(true);

   if (http_cache_) {
     http_cache_->set_mode(net::HttpCache::Mode::NORMAL);
   }
 }

 void H5vccStorage::DisableCache() {
   persistent_settings_->SetPersistentSetting(
       disk_cache::kCacheEnabledPersistentSettingsKey,
       std::make_unique<base::Value>(false));

   cobalt::cache::Cache::GetInstance()->set_enabled(false);

   if (http_cache_) {
     http_cache_->set_mode(net::HttpCache::Mode::DISABLE);
   }
 }

 void H5vccStorage::ClearCache() {
   if (ValidatedCacheBackend()) {
     network_module_->task_runner()->PostTask(
         FROM_HERE,
         base::Bind(&ClearCacheHelper, base::Unretained(cache_backend_)));
   }
   cobalt::cache::Cache::GetInstance()->DeleteAll();
 }

 bool H5vccStorage::ValidatedCacheBackend() {
   if (!http_cache_) {
     return false;
   }
   if (cache_backend_) {
     return true;
   }
   cache_backend_ = static_cast<disk_cache::CobaltBackendImpl*>(
       http_cache_->GetCurrentBackend());
   return cache_backend_ != nullptr;
 }

 }  // namespace h5vcc
 }  // namespace cobalt
	// Copyright 2015 The Cobalt Authors. All Rights Reserved.
	//
	// Licensed under the Apache License, Version 2.0 (the "License");
	// you may not use this file except in compliance with the License.
	// You may obtain a copy of the License at
	//
	// http://www.apache.org/licenses/LICENSE-2.0
	//
	// Unless required by applicable law or agreed to in writing, software
	// distributed under the License is distributed on an "AS IS" BASIS,
	// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	// See the License for the specific language governing permissions and
	// limitations under the License.

	#include <algorithm>
	#include <memory>
	#include <string>
	#include <utility>
	#include <vector>

	#include "base/files/file_util.h"
	#include "base/values.h"
	#include "cobalt/cache/cache.h"
	#include "cobalt/h5vcc/h5vcc_storage.h"
	#include "cobalt/persistent_storage/persistent_settings.h"
	#include "cobalt/storage/storage_manager.h"
	#include "net/base/completion_once_callback.h"
	#include "net/disk_cache/cobalt/cobalt_backend_impl.h"
	#include "net/disk_cache/cobalt/resource_type.h"
	#include "net/http/http_cache.h"
	#include "net/http/http_transaction_factory.h"

	#include "starboard/common/file.h"
	#include "starboard/common/string.h"

	namespace cobalt {
	namespace h5vcc {

	namespace {

	const char kTestFileName[] = "cache_test_file.json";

	const uint32 kWriteBufferSize = 1024 * 1024;

	const uint32 kReadBufferSize = 1024 * 1024;

	H5vccStorageWriteTestResponse WriteTestResponse(std::string error = "",
	uint32 bytes_written = 0) {
	H5vccStorageWriteTestResponse response;
	response.set_error(error);
	response.set_bytes_written(bytes_written);
	return response;
	}

	H5vccStorageVerifyTestResponse VerifyTestResponse(std::string error = "",
	bool verified = false,
	uint32 bytes_read = 0) {
	H5vccStorageVerifyTestResponse response;
	response.set_error(error);
	response.set_verified(verified);
	response.set_bytes_read(bytes_read);
	return response;
	}

	H5vccStorageSetQuotaResponse SetQuotaResponse(std::string error = "",
	bool success = false) {
	H5vccStorageSetQuotaResponse response;
	response.set_success(success);
	response.set_error(error);
	return response;
	}

	void ClearCacheHelper(disk_cache::Backend* backend) {
	backend->DoomAllEntries(base::DoNothing());
	}

	void ClearCacheOfTypeHelper(disk_cache::ResourceType type,
	disk_cache::CobaltBackendImpl* backend) {
	backend->DoomAllEntriesOfType(type, base::DoNothing());
	}

	} // namespace

	H5vccStorage::H5vccStorage(
	network::NetworkModule* network_module,
	persistent_storage::PersistentSettings* persistent_settings)
	: network_module_(network_module),
	persistent_settings_(persistent_settings) {
	http_cache_ = nullptr;
	cache_backend_ = nullptr;
	if (network_module == nullptr) {
	return;
	}
	auto url_request_context = network_module_->url_request_context();
	if (url_request_context->using_http_cache()) {
	http_cache_ = url_request_context->http_transaction_factory()->GetCache();
	}
	}

	void H5vccStorage::ClearCookies() {
	net::CookieStore* cookie_store =
	network_module_->url_request_context()->cookie_store();
	auto* cookie_monster = static_cast<net::CookieMonster*>(cookie_store);
	network_module_->task_runner()->PostBlockingTask(
	FROM_HERE,
	base::Bind(&net::CookieMonster::DeleteAllMatchingInfoAsync,
	base::Unretained(cookie_monster), net::CookieDeletionInfo(),
	base::Passed(net::CookieStore::DeleteCallback())));
	}

	void H5vccStorage::Flush(const base::Optional<bool>& sync) {
	if (sync.value_or(false) == true) {
	DLOG(WARNING) << "Synchronous flush is not supported.";
	}

	network_module_->storage_manager()->FlushNow(base::Closure());
	}

	bool H5vccStorage::GetCookiesEnabled() {
	return network_module_->network_delegate()->cookies_enabled();
	}

	void H5vccStorage::SetCookiesEnabled(bool enabled) {
	network_module_->network_delegate()->set_cookies_enabled(enabled);
	}

	H5vccStorageWriteTestResponse H5vccStorage::WriteTest(uint32 test_size,
	std::string test_string) {
	// Get cache_dir path.
	std::vector<char> cache_dir(kSbFileMaxPath + 1, 0);
	SbSystemGetPath(kSbSystemPathCacheDirectory, cache_dir.data(),
	kSbFileMaxPath);

	// Delete the contents of cache_dir.
	starboard::SbFileDeleteRecursive(cache_dir.data(), true);

	// Try to Create the test_file.
	std::string test_file_path =
	std::string(cache_dir.data()) + kSbFileSepString + kTestFileName;
	SbFileError test_file_error;
	starboard::ScopedFile test_file(test_file_path.c_str(),
	kSbFileOpenAlways \| kSbFileWrite, NULL,
	&test_file_error);

	if (test_file_error != kSbFileOk) {
	return WriteTestResponse(
	starboard::FormatString("SbFileError: %d while opening ScopedFile: %s",
	test_file_error, test_file_path.c_str()));
	}

	// Repeatedly write test_string to test_size bytes of write_buffer.
	std::string write_buf;
	int iterations = test_size / test_string.length();
	for (int i = 0; i < iterations; ++i) {
	write_buf.append(test_string);
	}
	write_buf.append(test_string.substr(0, test_size % test_string.length()));

	// Incremental Writes of test_data, copies SbWriteAll, using a maximum
	// kWriteBufferSize per write.
	uint32 total_bytes_written = 0;

	do {
	auto bytes_written = test_file.Write(
	write_buf.data() + total_bytes_written,
	std::min(kWriteBufferSize, test_size - total_bytes_written));
	if (bytes_written <= 0) {
	SbFileDelete(test_file_path.c_str());
	return WriteTestResponse("SbWrite -1 return value error");
	}
	total_bytes_written += bytes_written;
	} while (total_bytes_written < test_size);

	test_file.Flush();

	return WriteTestResponse("", total_bytes_written);
	}

	H5vccStorageVerifyTestResponse H5vccStorage::VerifyTest(
	uint32 test_size, std::string test_string) {
	std::vector<char> cache_dir(kSbFileMaxPath + 1, 0);
	SbSystemGetPath(kSbSystemPathCacheDirectory, cache_dir.data(),
	kSbFileMaxPath);

	std::string test_file_path =
	std::string(cache_dir.data()) + kSbFileSepString + kTestFileName;
	SbFileError test_file_error;
	starboard::ScopedFile test_file(test_file_path.c_str(),
	kSbFileOpenOnly \| kSbFileRead, NULL,
	&test_file_error);

	if (test_file_error != kSbFileOk) {
	return VerifyTestResponse(
	starboard::FormatString("SbFileError: %d while opening ScopedFile: %s",
	test_file_error, test_file_path.c_str()));
	}

	// Incremental Reads of test_data, copies SbReadAll, using a maximum
	// kReadBufferSize per write.
	uint32 total_bytes_read = 0;

	do {
	char read_buf[kReadBufferSize];
	auto bytes_read = test_file.Read(
	read_buf, std::min(kReadBufferSize, test_size - total_bytes_read));
	if (bytes_read <= 0) {
	SbFileDelete(test_file_path.c_str());
	return VerifyTestResponse("SbRead -1 return value error");
	}

	// Verify read_buf equivalent to a repeated test_string.
	for (auto i = 0; i < bytes_read; ++i) {
	if (read_buf[i] !=
	test_string[(total_bytes_read + i) % test_string.size()]) {
	return VerifyTestResponse(
	"File test data does not match with test data string");
	}
	}

	total_bytes_read += bytes_read;
	} while (total_bytes_read < test_size);

	if (total_bytes_read != test_size) {
	SbFileDelete(test_file_path.c_str());
	return VerifyTestResponse(
	"File test data size does not match kTestDataSize");
	}

	SbFileDelete(test_file_path.c_str());
	return VerifyTestResponse("", true, total_bytes_read);
	}

	H5vccStorageSetQuotaResponse H5vccStorage::SetQuota(
	H5vccStorageResourceTypeQuotaBytesDictionary quota) {
	if (!quota.has_other() \|\| !quota.has_html() \|\| !quota.has_css() \|\|
	!quota.has_image() \|\| !quota.has_font() \|\| !quota.has_splash() \|\|
	!quota.has_uncompiled_js() \|\| !quota.has_compiled_js() \|\|
	!quota.has_cache_api()) {
	return SetQuotaResponse(
	"H5vccStorageResourceTypeQuotaBytesDictionary input parameter missing "
	"required fields.");
	}

	if (quota.other() < 0 \|\| quota.html() < 0 \|\| quota.css() < 0 \|\|
	quota.image() < 0 \|\| quota.font() < 0 \|\| quota.splash() < 0 \|\|
	quota.uncompiled_js() < 0 \|\| quota.compiled_js() < 0 \|\|
	quota.cache_api() < 0) {
	return SetQuotaResponse(
	"H5vccStorageResourceTypeQuotaBytesDictionary input parameter fields "
	"cannot have a negative value.");
	}

	auto quota_total = quota.other() + quota.html() + quota.css() +
	quota.image() + quota.font() + quota.splash() +
	quota.uncompiled_js() + quota.compiled_js() +
	quota.cache_api();

	uint32_t max_quota_size = 24 * 1024 * 1024;
	#if SB_API_VERSION >= 14
	max_quota_size = kSbMaxSystemPathCacheDirectorySize;
	#endif
	// Assume the non-http-cache memory in kSbSystemPathCacheDirectory
	// is less than 1 mb and subtract this from the max_quota_size.
	max_quota_size -= (1 << 20);

	if (quota_total != max_quota_size) {
	return SetQuotaResponse(starboard::FormatString(
	"H5vccStorageResourceTypeQuotaDictionary input parameter field values "
	"sum (%d) is not equal to the max cache size (%d).",
	quota_total, max_quota_size));
	}

	ValidatedCacheBackend();

	// Write to persistent storage with the new quota values.
	SetAndSaveQuotaForBackend(disk_cache::kOther,
	static_cast<uint32_t>(quota.other()));
	SetAndSaveQuotaForBackend(disk_cache::kHTML,
	static_cast<uint32_t>(quota.html()));
	SetAndSaveQuotaForBackend(disk_cache::kCSS,
	static_cast<uint32_t>(quota.css()));
	SetAndSaveQuotaForBackend(disk_cache::kImage,
	static_cast<uint32_t>(quota.image()));
	SetAndSaveQuotaForBackend(disk_cache::kFont,
	static_cast<uint32_t>(quota.font()));
	SetAndSaveQuotaForBackend(disk_cache::kSplashScreen,
	static_cast<uint32_t>(quota.splash()));
	SetAndSaveQuotaForBackend(disk_cache::kUncompiledScript,
	static_cast<uint32_t>(quota.uncompiled_js()));
	SetAndSaveQuotaForBackend(disk_cache::kCompiledScript,
	static_cast<uint32_t>(quota.compiled_js()));
	SetAndSaveQuotaForBackend(disk_cache::kCacheApi,
	static_cast<uint32_t>(quota.cache_api()));
	return SetQuotaResponse("", true);
	}

	void H5vccStorage::SetAndSaveQuotaForBackend(disk_cache::ResourceType type,
	uint32_t bytes) {
	if (cache_backend_) {
	cache_backend_->UpdateSizes(type, bytes);

	if (bytes == 0) {
	network_module_->task_runner()->PostTask(
	FROM_HERE, base::Bind(&ClearCacheOfTypeHelper, type,
	base::Unretained(cache_backend_)));
	}
	}
	cobalt::cache::Cache::GetInstance()->Resize(type, bytes);
	}

	H5vccStorageResourceTypeQuotaBytesDictionary H5vccStorage::GetQuota() {
	// Return persistent storage quota values.
	H5vccStorageResourceTypeQuotaBytesDictionary quota;
	if (!ValidatedCacheBackend()) {
	return quota;
	}

	quota.set_other(cache_backend_->GetQuota(disk_cache::kOther));
	quota.set_html(cache_backend_->GetQuota(disk_cache::kHTML));
	quota.set_css(cache_backend_->GetQuota(disk_cache::kCSS));
	quota.set_image(cache_backend_->GetQuota(disk_cache::kImage));
	quota.set_font(cache_backend_->GetQuota(disk_cache::kFont));
	quota.set_splash(cache_backend_->GetQuota(disk_cache::kSplashScreen));
	quota.set_uncompiled_js(
	cache_backend_->GetQuota(disk_cache::kUncompiledScript));
	quota.set_compiled_js(
	cobalt::cache::Cache::GetInstance()
	->GetMaxCacheStorageInBytes(disk_cache::kCompiledScript)
	.value());
	quota.set_cache_api(cache_backend_->GetQuota(disk_cache::kCacheApi));

	uint32_t max_quota_size = 24 * 1024 * 1024;
	#if SB_API_VERSION >= 14
	max_quota_size = kSbMaxSystemPathCacheDirectorySize;
	#endif
	// Assume the non-http-cache memory in kSbSystemPathCacheDirectory
	// is less than 1 mb and subtract this from the max_quota_size.
	max_quota_size -= (1 << 20);

	quota.set_total(max_quota_size);

	return quota;
	}

	void H5vccStorage::EnableCache() {
	persistent_settings_->SetPersistentSetting(
	disk_cache::kCacheEnabledPersistentSettingsKey,
	std::make_unique<base::Value>(true));

	cobalt::cache::Cache::GetInstance()->set_enabled(true);

	if (http_cache_) {
	http_cache_->set_mode(net::HttpCache::Mode::NORMAL);
	}
	}

	void H5vccStorage::DisableCache() {
	persistent_settings_->SetPersistentSetting(
	disk_cache::kCacheEnabledPersistentSettingsKey,
	std::make_unique<base::Value>(false));

	cobalt::cache::Cache::GetInstance()->set_enabled(false);

	if (http_cache_) {
	http_cache_->set_mode(net::HttpCache::Mode::DISABLE);
	}
	}

	void H5vccStorage::ClearCache() {
	if (ValidatedCacheBackend()) {
	network_module_->task_runner()->PostTask(
	FROM_HERE,
	base::Bind(&ClearCacheHelper, base::Unretained(cache_backend_)));
	}
	cobalt::cache::Cache::GetInstance()->DeleteAll();
	}

	bool H5vccStorage::ValidatedCacheBackend() {
	if (!http_cache_) {
	return false;
	}
	if (cache_backend_) {
	return true;
	}
	cache_backend_ = static_cast<disk_cache::CobaltBackendImpl*>(
	http_cache_->GetCurrentBackend());
	return cache_backend_ != nullptr;
	}

	} // namespace h5vcc
	} // namespace cobalt