| // 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 "chrome/browser/chromeos/version_loader.h" |
| |
| #include <vector> |
| |
| #include "base/file_path.h" |
| #include "base/file_util.h" |
| #include "base/message_loop.h" |
| #include "base/string_util.h" |
| #include "base/thread.h" |
| #include "chrome/browser/browser_process.h" |
| |
| namespace chromeos { |
| |
| // Beginning of line we look for that gives version number. |
| static const char kPrefix[] = "CHROMEOS_RELEASE_DESCRIPTION="; |
| |
| // File to look for version number in. |
| static const char kPath[] = "/etc/lsb-release"; |
| |
| VersionLoader::VersionLoader() : backend_(new Backend()) { |
| } |
| |
| VersionLoader::Handle VersionLoader::GetVersion( |
| CancelableRequestConsumerBase* consumer, |
| VersionLoader::GetVersionCallback* callback) { |
| if (!g_browser_process->file_thread()) { |
| // This should only happen if Chrome is shutting down, so we don't do |
| // anything. |
| return 0; |
| } |
| |
| scoped_refptr<CancelableRequest<GetVersionCallback> > request( |
| new CancelableRequest<GetVersionCallback>(callback)); |
| AddRequest(request, consumer); |
| |
| g_browser_process->file_thread()->message_loop()->PostTask( |
| FROM_HERE, |
| NewRunnableMethod(backend_.get(), &Backend::GetVersion, request)); |
| return request->handle(); |
| } |
| |
| // static |
| std::string VersionLoader::ParseVersion(const std::string& contents) { |
| // The file contains lines such as: |
| // XXX=YYY |
| // AAA=ZZZ |
| // Split the lines and look for the one that starts with kPrefix. The version |
| // file is small, which is why we don't try and be tricky. |
| std::vector<std::string> lines; |
| SplitString(contents, '\n', &lines); |
| for (size_t i = 0; i < lines.size(); ++i) { |
| if (StartsWithASCII(lines[i], kPrefix, false)) { |
| std::string version = lines[i].substr(std::string(kPrefix).size()); |
| if (version.size() > 1 && version[0] == '"' && |
| version[version.size() - 1] == '"') { |
| // Trim trailing and leading quotes. |
| version = version.substr(1, version.size() - 2); |
| } |
| return version; |
| } |
| } |
| return std::string(); |
| } |
| |
| void VersionLoader::Backend::GetVersion( |
| scoped_refptr<GetVersionRequest> request) { |
| if (request->canceled()) |
| return; |
| |
| std::string version; |
| std::string contents; |
| if (file_util::ReadFileToString(FilePath(kPath), &contents)) |
| version = ParseVersion(contents); |
| request->ForwardResult(GetVersionCallback::TupleType(request->handle(), |
| version)); |
| } |
| |
| } // namespace chromeos |