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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "remoting/host/win/host_event_file_logger.h"
#include <string>
#include <utility>
#include "base/base_paths.h"
#include "base/check.h"
#include "base/containers/span.h"
#include "base/files/file_util.h"
#include "base/i18n/time_formatting.h"
#include "base/logging.h"
#include "base/memory/ptr_util.h"
#include "base/path_service.h"
#include "base/strings/stringprintf.h"
#include "base/time/time.h"
#include "remoting/host/win/event_trace_data.h"
namespace remoting {
namespace {
constexpr wchar_t kLatestLogSymbolicLinkName[] = L"latest.log";
} // namespace
HostEventFileLogger::HostEventFileLogger(base::File log_file)
: log_file_(std::move(log_file)) {}
HostEventFileLogger::~HostEventFileLogger() = default;
std::unique_ptr<HostEventLogger> HostEventFileLogger::Create() {
base::FilePath directory;
bool result = base::PathService::Get(base::DIR_EXE, &directory);
DCHECK(result);
if (!base::DirectoryExists(directory)) {
LOG(ERROR) << "PathService returned an invalid DIR_EXE directory: "
<< directory;
return nullptr;
}
base::FilePath log_file_path =
directory.AppendASCII(base::UnlocalizedTimeFormatWithPattern(
base::Time::Now(),
"'chrome_remote_desktop'_yyyyMMdd_HHmmss_SSS.'log'"));
// Create the log_file and set the write mode to append.
base::File log_file(log_file_path, base::File::Flags::FLAG_APPEND |
base::File::Flags::FLAG_CREATE);
if (!log_file.IsValid()) {
LOG(ERROR) << "Failed to create the output log file at: " << log_file_path;
return nullptr;
}
base::FilePath sym_link_path = directory.Append(kLatestLogSymbolicLinkName);
// We don't need to check for existence first as DeleteFile() 'succeeds' if
// the file doesn't exist.
if (!base::DeleteFile(sym_link_path)) {
PLOG(WARNING) << "Failed to delete symlink";
}
if (!::CreateSymbolicLink(sym_link_path.value().c_str(),
log_file_path.value().c_str(),
/*file*/ 0)) {
PLOG(WARNING) << "Failed to create symbolic link for latest log file.";
}
return base::WrapUnique(new HostEventFileLogger(std::move(log_file)));
}
void HostEventFileLogger::LogEvent(const EventTraceData& data) {
// Log format is:
// [YYYYMMDD/HHMMSS.sss:pid:tid:severity:file_name(line)] <message>
const std::string timestamp = base::UnlocalizedTimeFormatWithPattern(
data.time_stamp, "yyyyMMdd/HHmmss.SSS");
std::string message = base::StringPrintf(
"[%s:%05d:%05d:%s:%s(%d)] %s", timestamp.c_str(), data.process_id,
data.thread_id, EventTraceData::SeverityToString(data.severity).c_str(),
data.file_name.c_str(), data.line, data.message.c_str());
log_file_.WriteAtCurrentPosAndCheck(base::as_byte_span(message));
}
} // namespace remoting
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