127 lines
3.1 KiB
Go
127 lines
3.1 KiB
Go
package logger
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/*
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/*
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Copyright 2024 Jonas Kaninda
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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import (
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"fmt"
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"log"
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"os"
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"runtime"
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"strings"
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"github.com/jkaninda/goma-gateway/util"
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)
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// Generic logging function
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func logMessage(level, defaultOutput, msg string, args ...interface{}) {
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logLevel := getLogLevel()
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if shouldLog(level, logLevel) {
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log.SetOutput(getStd(util.GetStringEnv("GOMA_ACCESS_LOG", defaultOutput)))
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logWithCaller(level, msg, args...)
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}
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}
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// Info logs informational messages
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func Info(msg string, args ...interface{}) {
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logMessage("INFO", "/dev/stdout", msg, args...)
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}
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// Warn logs warning messages
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func Warn(msg string, args ...interface{}) {
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logMessage("WARN", "/dev/stdout", msg, args...)
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}
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// Error logs error messages
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func Error(msg string, args ...interface{}) {
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logMessage("ERROR", "/dev/stderr", msg, args...)
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}
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// Fatal logs fatal errors and exits the program
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func Fatal(msg string, args ...interface{}) {
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log.SetOutput(os.Stdout)
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logWithCaller("ERROR", msg, args...)
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os.Exit(1)
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}
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// Debug logs debug messages
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func Debug(msg string, args ...interface{}) {
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logMessage("DEBUG", "/dev/stdout", msg, args...)
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}
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// Trace logs trace messages
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func Trace(msg string, args ...interface{}) {
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logMessage("TRACE", "/dev/stdout", msg, args...)
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}
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// Determines whether the message should be logged based on log level
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func shouldLog(level, currentLevel string) bool {
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levelOrder := map[string]int{
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"trace": 1,
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"debug": 2,
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"info": 3,
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"warn": 4,
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"error": 5,
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"off": 6,
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}
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current := strings.ToLower(currentLevel)
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target := strings.ToLower(level)
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return levelOrder[target] >= levelOrder[current]
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}
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// Helper function to format and log messages with file and line number
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func logWithCaller(level, msg string, args ...interface{}) {
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// Format message if there are additional arguments
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formattedMessage := msg
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if len(args) > 0 {
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formattedMessage = fmt.Sprintf(msg, args...)
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}
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// Get the caller's file and line number (skip 2 frames)
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_, file, line, ok := runtime.Caller(2)
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if !ok {
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file = "unknown"
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line = 0
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}
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if getLogLevel() == traceLog {
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log.Printf("%s: %s (File: %s, Line: %d)\n", level, formattedMessage, file, line)
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} else {
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log.Printf("%s: %s\n", level, formattedMessage)
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}
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}
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// Determines the appropriate standard output based on the environment variable
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func getStd(out string) *os.File {
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switch out {
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case "/dev/stdout":
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return os.Stdout
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case "/dev/stderr":
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return os.Stderr
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case "/dev/stdin":
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return os.Stdin
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default:
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return os.Stdout
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}
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}
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// Retrieves the current log level from environment variables
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func getLogLevel() string {
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return strings.ToLower(util.GetStringEnv("GOMA_LOG_LEVEL", ""))
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}
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