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- // 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<extensions::ExtensionResource> 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<std::unique_ptr<std::string>> data;
- data.reserve(resources_.size());
- absl::optional<std::string> error;
- for (const auto& resource : resources_) {
- data.push_back(std::make_unique<std::string>());
- 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)));
- }
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