logger.cpp
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#include "logger.h"
#include <ctime>
#include <sstream>
#include <iomanip>
#include <string.h>
#include "exceptions.h"
Logger *Logger::instance = nullptr;
std::string Logger::logPath = "";
Logger::Logger()
{
}
std::string Logger::getLogLevelString(int level) const
{
switch (level)
{
case LOG_NONE:
return "NONE";
case LOG_INFO:
return "INFO";
case LOG_NOTICE:
return "NOTICE";
case LOG_WARNING:
return "WARNING";
case LOG_ERR:
return "ERROR";
case LOG_DEBUG:
return "DEBUG";
case LOG_SUBSCRIBE:
return "SUBSCRIBE";
case LOG_UNSUBSCRIBE:
return "UNSUBSCRIBE";
default:
return "UNKNOWN LOG LEVEL";
}
}
Logger *Logger::getInstance()
{
if (instance == nullptr)
instance = new Logger();
return instance;
}
void Logger::logf(int level, const char *str, ...)
{
va_list valist;
va_start(valist, str);
this->logf(level, str, valist);
va_end(valist);
}
void Logger::reOpen()
{
std::lock_guard<std::mutex> locker(logMutex);
if (file)
{
fclose(file);
file = nullptr;
}
if (logPath.empty())
return;
if ((file = fopen(logPath.c_str(), "a")) == nullptr)
{
std::string msg(strerror(errno));
throw ConfigFileException("Error opening logfile: " + msg);
}
}
// I want all messages logged during app startup to also show on stdout/err, otherwise failure can look so silent. So, call this when the app started.
void Logger::noLongerLogToStd()
{
alsoLogToStd = false;
}
void Logger::setLogPath(const std::string &path)
{
Logger::logPath = path;
}
void Logger::setFlags(bool logDebug, bool logSubscriptions)
{
std::lock_guard<std::mutex> locker(logMutex);
if (logDebug)
curLogLevel |= LOG_DEBUG;
else
curLogLevel &= ~LOG_DEBUG;
if (logSubscriptions)
curLogLevel |= (LOG_UNSUBSCRIBE & LOG_SUBSCRIBE);
else
curLogLevel &= ~(LOG_UNSUBSCRIBE & LOG_SUBSCRIBE);
}
void Logger::logf(int level, const char *str, va_list valist)
{
if ((level & curLogLevel) == 0)
return;
std::lock_guard<std::mutex> locker(logMutex);
time_t time = std::time(nullptr);
struct tm tm = *std::localtime(&time);
std::ostringstream oss;
std::string str_(str);
oss << "[" << std::put_time(&tm, "%Y-%m-%d %H:%M:%S") << "] [" << getLogLevelString(level) << "] " << str_;
oss.flush();
const std::string s = oss.str();
const char *logfmtstring = s.c_str();
if (this->file)
{
va_list valist2;
va_copy(valist2, valist);
vfprintf(this->file, logfmtstring, valist2);
fprintf(this->file, "\n");
fflush(this->file);
va_end(valist2);
}
if (!this->file || alsoLogToStd)
{
#ifdef TESTING
vfprintf(stderr, logfmtstring, valist); // the stdout interfers with Qt test XML output, so using stderr.
fprintf(stderr, "\n");
fflush(stderr);
#else
vfprintf(stdout, logfmtstring, valist);
fprintf(stdout, "\n");
fflush(stdout);
#endif
}
}
int logSslError(const char *str, size_t len, void *u)
{
Logger *logger = Logger::getInstance();
logger->logf(LOG_ERR, str);
return 0;
}