// Copyright (c) 2011 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 "extensions/browser/file_reader.h" #include "base/bind.h" #include "base/callback_helpers.h" #include "base/files/file_util.h" #include "base/strings/stringprintf.h" #include "base/threading/thread_task_runner_handle.h" #include "extensions/browser/extension_file_task_runner.h" FileReader::FileReader(std::vector resources, OptionalFileSequenceTask optional_file_sequence_task, DoneCallback done_callback) : resources_(std::move(resources)), optional_file_sequence_task_(std::move(optional_file_sequence_task)), done_callback_(std::move(done_callback)), origin_task_runner_(base::ThreadTaskRunnerHandle::Get()) {} void FileReader::Start() { extensions::GetExtensionFileTaskRunner()->PostTask( FROM_HERE, base::BindOnce(&FileReader::ReadFilesOnFileSequence, this)); } FileReader::~FileReader() {} void FileReader::ReadFilesOnFileSequence() { DCHECK( extensions::GetExtensionFileTaskRunner()->RunsTasksInCurrentSequence()); std::vector> data; data.reserve(resources_.size()); absl::optional error; for (const auto& resource : resources_) { data.push_back(std::make_unique()); std::string* file_data = data.back().get(); bool success = base::ReadFileToString(resource.GetFilePath(), file_data); if (!success) { error = base::StringPrintf("Could not load file: '%s'.", resource.relative_path().AsUTF8Unsafe().c_str()); // Clear `data` to avoid passing a partial result. data.clear(); break; } if (optional_file_sequence_task_) optional_file_sequence_task_.Run(file_data); } // Release any potentially-bound references from the file sequence task. optional_file_sequence_task_.Reset(); origin_task_runner_->PostTask( FROM_HERE, base::BindOnce(std::move(done_callback_), std::move(data), std::move(error))); }