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// Copyright 2014 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 "chrome/browser/chromeos/file_system_provider/operations/get_metadata.h"
#include <algorithm>
#include <string>
#include "chrome/common/extensions/api/file_system_provider.h"
#include "chrome/common/extensions/api/file_system_provider_internal.h"
namespace chromeos {
namespace file_system_provider {
namespace operations {
namespace {
// Convert |value| into |output|. If parsing fails, then returns false.
bool ConvertRequestValueToFileInfo(scoped_ptr<RequestValue> value,
bool root_entry,
EntryMetadata* output) {
using extensions::api::file_system_provider::EntryMetadata;
using extensions::api::file_system_provider_internal::
GetMetadataRequestedSuccess::Params;
const Params* params = value->get_metadata_success_params();
if (!params)
return false;
if (!ValidateIDLEntryMetadata(params->metadata, root_entry))
return false;
output->name = params->metadata.name;
output->is_directory = params->metadata.is_directory;
output->size = static_cast<int64>(params->metadata.size);
std::string input_modification_time;
if (!params->metadata.modification_time.additional_properties.GetString(
"value", &input_modification_time)) {
NOTREACHED();
}
// Allow to pass invalid modification time, since there is no way to verify
// it easily on any earlier stage.
base::Time::FromString(input_modification_time.c_str(),
&output->modification_time);
if (params->metadata.mime_type.get())
output->mime_type = *params->metadata.mime_type.get();
if (params->metadata.thumbnail.get())
output->thumbnail = *params->metadata.thumbnail.get();
return true;
}
} // namespace
bool ValidateIDLEntryMetadata(
const extensions::api::file_system_provider::EntryMetadata& metadata,
bool root_entry) {
using extensions::api::file_system_provider::EntryMetadata;
if (!ValidateName(metadata.name, root_entry))
return false;
std::string input_modification_time;
if (!metadata.modification_time.additional_properties.GetString(
"value", &input_modification_time)) {
return false;
}
if (metadata.thumbnail.get()) {
// Sanity check for the thumbnail format. Note, that another, more granural
// check is done in custom bindings. Note, this is an extra check only for
// the security reasons.
const std::string expected_prefix = "data:";
std::string thumbnail_prefix =
metadata.thumbnail.get()->substr(0, expected_prefix.size());
std::transform(thumbnail_prefix.begin(),
thumbnail_prefix.end(),
thumbnail_prefix.begin(),
::tolower);
if (expected_prefix != thumbnail_prefix)
return false;
}
return true;
}
bool ValidateName(const std::string& name, bool root_entry) {
if (root_entry)
return name.empty();
return !name.empty() && name.find('/') == std::string::npos;
}
GetMetadata::GetMetadata(
extensions::EventRouter* event_router,
const ProvidedFileSystemInfo& file_system_info,
const base::FilePath& entry_path,
ProvidedFileSystemInterface::MetadataFieldMask fields,
const ProvidedFileSystemInterface::GetMetadataCallback& callback)
: Operation(event_router, file_system_info),
entry_path_(entry_path),
fields_(fields),
callback_(callback) {
}
GetMetadata::~GetMetadata() {
}
bool GetMetadata::Execute(int request_id) {
using extensions::api::file_system_provider::GetMetadataRequestedOptions;
GetMetadataRequestedOptions options;
options.file_system_id = file_system_info_.file_system_id();
options.request_id = request_id;
options.entry_path = entry_path_.AsUTF8Unsafe();
options.thumbnail =
fields_ & ProvidedFileSystemInterface::METADATA_FIELD_THUMBNAIL;
return SendEvent(
request_id,
extensions::api::file_system_provider::OnGetMetadataRequested::kEventName,
extensions::api::file_system_provider::OnGetMetadataRequested::Create(
options));
}
void GetMetadata::OnSuccess(int /* request_id */,
scoped_ptr<RequestValue> result,
bool has_more) {
scoped_ptr<EntryMetadata> metadata(new EntryMetadata);
const bool convert_result = ConvertRequestValueToFileInfo(
result.Pass(), entry_path_.AsUTF8Unsafe() == FILE_PATH_LITERAL("/"),
metadata.get());
if (!convert_result) {
LOG(ERROR) << "Failed to parse a response for the get metadata operation.";
callback_.Run(make_scoped_ptr<EntryMetadata>(NULL),
base::File::FILE_ERROR_IO);
return;
}
callback_.Run(metadata.Pass(), base::File::FILE_OK);
}
void GetMetadata::OnError(int /* request_id */,
scoped_ptr<RequestValue> /* result */,
base::File::Error error) {
callback_.Run(make_scoped_ptr<EntryMetadata>(NULL), error);
}
} // namespace operations
} // namespace file_system_provider
} // namespace chromeos
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