zap: تمام پتانسیل ورود به سیستم را باز کنید

// Code
var log *zap.Logger
log = zap.NewExample()
log, _ := zap.NewDevelopment()
log, _ := zap.NewProduction()
log.Debug("This is a DEBUG message")
log.Info("This is an INFO message")

// Example Output
{"level":"debug","msg":"This is a DEBUG message"}
{"level":"info","msg":"This is an INFO message"}

// Development Output
2025-01-28T00:00:00.000+0800    DEBUG    development/main.go:7    This is a DEBUG message
2025-01-28T00:00:00.000+0800    INFO    development/main.go:8    This is an INFO message

// Production Output
{"level":"info","ts":1737907200.0000000,"caller":"production/main.go:8","msg":"This is an INFO message"}
{"level":"info","ts":1737907200.0000000,"caller":"production/main.go:9","msg":"This is an INFO message with fields","region":["us-west"],"id":2}

var sugarLogger *zap.SugaredLogger

func InitLogger() {
  logger, _ := zap.NewProduction()
    sugarLogger = logger.Sugar()
}

func main() {
    InitLogger()
    defer sugarLogger.Sync()
    sugarLogger.Errorf("Error fetching URL %s : Error = %s", url, err)
}

package main

import (
    "go.uber.org/zap"
    "go.uber.org/zap/zapcore"
    "os"
)

var log *zap.Logger
func main() {
    writeSyncer, _ := os.Create("./info.log")                           // Log file storage directory
    encoderConfig := zap.NewProductionEncoderConfig()                    // Specify time format
    encoderConfig.EncodeTime = zapcore.ISO8601TimeEncoder
    encoderConfig.EncodeLevel = zapcore.CapitalLevelEncoder
    encoder := zapcore.NewConsoleEncoder(encoderConfig)                 // Get the encoder, NewJSONEncoder() outputs in JSON format, NewConsoleEncoder() outputs in plain text format
    core := zapcore.NewCore(encoder, writeSyncer, zapcore.DebugLevel)    // The third and subsequent parameters are the log levels for writing to the file. In ErrorLevel mode, only error - level logs are recorded.
    log = zap.New(core,zap.AddCaller())                                // AddCaller() is used to display the file name and line number.
    log.Info("hello world")
    log.Error("hello world")
}

// Log file output result:
2025-01-28T00:00:00.000+0800    INFO    geth/main.go:18 hello world
2025-01-28T00:00:00.000+0800    ERROR   geth/main.go:19 hello world

package main

import (
    "github.com/natefinch/lumberjack"
    "go.uber.org/zap"
    "go.uber.org/zap/zapcore"
    "os"
)

var log *zap.Logger

func main() {
    // Get the encoder, NewJSONEncoder() outputs in JSON format, NewConsoleEncoder() outputs in plain text format
    encoderConfig := zap.NewProductionEncoderConfig()
    encoderConfig.EncodeTime = zapcore.ISO8601TimeEncoder // Specify time format
    encoderConfig.EncodeLevel = zapcore.CapitalLevelEncoder
    encoder := zapcore.NewConsoleEncoder(encoderConfig)

    // File writeSyncer
    fileWriteSyncer := zapcore.AddSync(&lumberjack.Logger{
        Filename:   "./info.log", // Log file storage directory
        MaxSize:    1,            // File size limit, unit MB
        MaxBackups: 5,            // Maximum number of retained log files
        MaxAge:     30,           // Number of days to retain log files
        Compress:   false,        // Whether to compress
    })
    fileCore := zapcore.NewCore(encoder, zapcore.NewMultiWriteSyncer(fileWriteSyncer,zapcore.AddSync(os.Stdout)), zapcore.DebugLevel) // The third and subsequent parameters are the log levels for writing to the file. In ErrorLevel mode, only error - level logs are recorded.

    log = zap.New(fileCore, zap.AddCaller()) // AddCaller() is used to display the file name and line number.


    log.Info("hello world")
    log.Error("hello world")
}

// File writeSyncer
fileWriteSyncer := zapcore.AddSync(&lumberjack.Logger{
    Filename:   "./info.log", // Log file storage directory. If the folder does not exist, it will be created automatically.
    MaxSize:    1,            // File size limit, unit MB
    MaxBackups: 5,            // Maximum number of retained log files
    MaxAge:     30,           // Number of days to retain log files
    Compress:   false,        // Whether to compress
})

package main

import (
    "github.com/natefinch/lumberjack"
    "go.uber.org/zap"
    "go.uber.org/zap/zapcore"
    "os"
)

var log *zap.Logger

func main() {
    var coreArr []zapcore.Core

    // Get the encoder
    encoderConfig := zap.NewProductionEncoderConfig()               // NewJSONEncoder() outputs in JSON format, NewConsoleEncoder() outputs in plain text format
    encoderConfig.EncodeTime = zapcore.ISO8601TimeEncoder           // Specify time format
    encoderConfig.EncodeLevel = zapcore.CapitalColorLevelEncoder    // Display different colors according to levels. If not needed, use zapcore.CapitalLevelEncoder.
    //encoderConfig.EncodeCaller = zapcore.FullCallerEncoder        // Display the full file path
    encoder := zapcore.NewConsoleEncoder(encoderConfig)

    // Log levels
    highPriority := zap.LevelEnablerFunc(func(lev zapcore.Level) bool{  // Error level
        return lev >= zap.ErrorLevel
    })
    lowPriority := zap.LevelEnablerFunc(func(lev zapcore.Level) bool {  // Info and debug levels, debug level is the lowest
        return lev < zap.ErrorLevel && lev >= zap.DebugLevel
    })

    // Info file writeSyncer
    infoFileWriteSyncer := zapcore.AddSync(&lumberjack.Logger{
        Filename:   "./log/info.log",   // Log file storage directory. If the folder does not exist, it will be created automatically.
        MaxSize:    1,                  // File size limit, unit MB
        MaxBackups: 5,                  // Maximum number of retained log files
        MaxAge:     30,                 // Number of days to retain log files
        Compress:   false,              // Whether to compress
    })
    infoFileCore := zapcore.NewCore(encoder, zapcore.NewMultiWriteSyncer(infoFileWriteSyncer,zapcore.AddSync(os.Stdout)), lowPriority) // The third and subsequent parameters are the log levels for writing to the file. In ErrorLevel mode, only error - level logs are recorded.
    // Error file writeSyncer
    errorFileWriteSyncer := zapcore.AddSync(&lumberjack.Logger{
        Filename:   "./log/error.log",      // Log file storage directory
        MaxSize:    1,                      // File size limit, unit MB
        MaxBackups: 5,                      // Maximum number of retained log files
        MaxAge:     30,                     // Number of days to retain log files
        Compress:   false,                  // Whether to compress
    })
    errorFileCore := zapcore.NewCore(encoder, zapcore.NewMultiWriteSyncer(errorFileWriteSyncer,zapcore.AddSync(os.Stdout)), highPriority) // The third and subsequent parameters are the log levels for writing to the file. In ErrorLevel mode, only error - level logs are recorded.

    coreArr = append(coreArr, infoFileCore)
    coreArr = append(coreArr, errorFileCore)
    log = zap.New(zapcore.NewTee(coreArr...), zap.AddCaller()) // zap.AddCaller() is used to display the file name and line number and can be omitted.

    log.Info("hello info")
    log.Debug("hello debug")
    log.Error("hello error")
}

// Get the encoder
encoderConfig := zap.NewProductionEncoderConfig()               // NewJSONEncoder() outputs in JSON format, NewConsoleEncoder() outputs in plain text format
encoderConfig.EncodeTime = zapcore.ISO8601TimeEncoder           // Specify time format
encoderConfig.EncodeLevel = zapcore.CapitalColorLevelEncoder    // Display different colors according to levels. If not needed, use zapcore.CapitalLevelEncoder.
encoder := zapcore.NewConsoleEncoder(encoderConfig)

// Get the encoder
encoderConfig := zap.NewProductionEncoderConfig()               // NewJSONEncoder() outputs in JSON format, NewConsoleEncoder() outputs in plain text format
encoderConfig.EncodeTime = zapcore.ISO8601TimeEncoder           // Specify time format
encoderConfig.EncodeLevel = zapcore.CapitalColorLevelEncoder    // Display different colors according to levels. If not needed, use zapcore.CapitalLevelEncoder.
encoderConfig.EncodeCaller = zapcore.FullCallerEncoder          // Display the full file path
encoder := zapcore.NewConsoleEncoder(encoderConfig)

package main

import (
    "github.com/natefinch/lumberjack"
    "go.uber.org/zap"
    "go.uber.org/zap/zapcore"
    "os"
)

var log *zap.Logger

func main() {
    var coreArr []zapcore.Core

    // Get the encoder
    encoderConfig := zap.NewProductionEncoderConfig()               // NewJSONEncoder() outputs in JSON format, NewConsoleEncoder() outputs in plain text format
    encoderConfig.EncodeTime = zapcore.ISO8601TimeEncoder           // Specify time format
    encoderConfig.EncodeLevel = zapcore.CapitalColorLevelEncoder    // Display different colors according to levels. If not needed, use zapcore.CapitalLevelEncoder.
    //encoderConfig.EncodeCaller = zapcore.FullCallerEncoder        // Display the full file path
    encoder := zapcore.NewConsoleEncoder(encoderConfig)

    // Log levels
    highPriority := zap.LevelEnablerFunc(func(lev zapcore.Level) bool{  // Error level
        return lev >= zap.ErrorLevel
    })
    lowPriority := zap.LevelEnablerFunc(func(lev zapcore.Level) bool {  // Info and debug levels, debug level is the lowest
        return lev < zap.ErrorLevel && lev >= zap.DebugLevel
    })

    // Info file writeSyncer
    infoFileWriteSyncer := zapcore.AddSync(&lumberjack.Logger{
        Filename:   "./log/info.log",   // Log file storage directory. If the folder does not exist, it will be created automatically.
        MaxSize:    2,                  // File size limit, unit MB
        MaxBackups: 100,                // Maximum number of retained log files
        MaxAge:     30,                 // Number of days to retain log files
        Compress:   false,              // Whether to compress
    })
    infoFileCore := zapcore.NewCore(encoder, zapcore.NewMultiWriteSyncer(infoFileWriteSyncer,zapcore.AddSync(os.Stdout)), lowPriority) // The third and subsequent parameters are the log levels for writing to the file. In ErrorLevel mode, only error - level logs are recorded.
    // Error file writeSyncer
    errorFileWriteSyncer := zapcore.AddSync(&lumberjack.Logger{
        Filename:   "./log/error.log",      // Log file storage directory
        MaxSize:    1,                      // File size limit, unit MB
        MaxBackups: 5,                      // Maximum number of retained log files
        MaxAge:     30,                     // Number of days to retain log files
        Compress:   false,                  // Whether to compress
    })
    errorFileCore := zapcore.NewCore(encoder, zapcore.NewMultiWriteSyncer(errorFileWriteSyncer,zapcore.AddSync(os.Stdout)), highPriority) // The third and subsequent parameters are the log levels for writing to the file. In ErrorLevel mode, only error - level logs are recorded.

    coreArr = append(coreArr, infoFileCore)
    coreArr = append(coreArr, errorFileCore)
    log = zap.New(zapcore.NewTee(coreArr...), zap.AddCaller()) // zap.AddCaller() is used to display the file name and line number and can be omitted.


    log.Info("hello info")
    log.Debug("hello debug")
    log.Error("hello error")
}