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Uber Zap 记录器未在日志语句中打印呼叫者信息

来源：stackoverflow
2024-04-29 23:45:38
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问题内容

我试图使用配置的自定义编码器同时将相同的消息发送到控制台和日志文件。在此过程中，我想显示呼叫者信息，但即使我按照文档中的建议使用了 caller 键，也不会显示相同的信息。

下面是相同的示例代码

package main

import (
    "os"
    "time"

    "go.uber.org/zap"
    "go.uber.org/zap/zapcore"
    "gopkg.in/natefinch/lumberjack.v2"
)

var logLevelSeverity = map[zapcore.Level]string{
    zapcore.DebugLevel:  "DEBUG",
    zapcore.InfoLevel:   "INFO",
    zapcore.WarnLevel:   "WARNING",
    zapcore.ErrorLevel:  "ERROR",
    zapcore.DPanicLevel: "CRITICAL",
    zapcore.PanicLevel:  "ALERT",
    zapcore.FatalLevel:  "EMERGENCY",
}

func SyslogTimeEncoder(t time.Time, enc zapcore.PrimitiveArrayEncoder) {
    enc.AppendString(t.Format("Jan 01, 2006  15:04:05"))
}

func CustomEncodeLevel(level zapcore.Level, enc zapcore.PrimitiveArrayEncoder) {
    enc.AppendString(logLevelSeverity[level])
}

func CustomLevelFileEncoder(level zapcore.Level, enc zapcore.PrimitiveArrayEncoder) {
    enc.AppendString("[" + logLevelSeverity[level] + "]")
}

func main() {

    w := zapcore.AddSync(&lumberjack.Logger{
        Filename:   "temp1.log",
        MaxSize:    1024,
        MaxBackups: 20,
        MaxAge:     28,
        Compress:   true,
    })

    //Define config for the console output
    cfgConsole := zapcore.EncoderConfig{
        MessageKey:   "message",
        LevelKey:     "severity",
        EncodeLevel:  CustomEncodeLevel,
        TimeKey:      "time",
        EncodeTime:   SyslogTimeEncoder,
        CallerKey:    "caller",
        EncodeCaller: zapcore.FullCallerEncoder,
    }
    cfgFile := zapcore.EncoderConfig{
        MessageKey:   "message",
        LevelKey:     "severity",
        EncodeLevel:  CustomLevelFileEncoder,
        TimeKey:      "time",
        EncodeTime:   SyslogTimeEncoder,
        CallerKey:    "caller",
        EncodeCaller: zapcore.FullCallerEncoder,
    }

    consoleDebugging := zapcore.Lock(os.Stdout)
    //consoleError := zapcore.Lock(os.Stderr)
    core := zapcore.NewTee(
        zapcore.NewCore(zapcore.NewConsoleEncoder(cfgFile), w, zap.DebugLevel),
        zapcore.NewCore(zapcore.NewJSONEncoder(cfgConsole), consoleDebugging, zap.DebugLevel),
        //zapcore.NewCore(zapcore.NewJSONEncoder(zap.NewProductionEncoderConfig()), consoleError, zap.ErrorLevel),
    )
    //core := zapcore.NewCore(zapcore.NewConsoleEncoder(encConsole), w, zap.DebugLevel)
    wlogger := zap.New(core)
    wlogger.Debug("Sample debug for log file and console")
    wlogger.Warn("An warning message example")
    wlogger.Info("An info level message")
    coreFile := zapcore.NewCore(zapcore.NewConsoleEncoder(cfgFile), w, zap.DebugLevel)
    flogger := zap.New(coreFile)
    flogger.Debug("An exclusive message for file")
    //output
    //{"severity":"DEBUG","time":"Nov 11, 2018  20:24:11","message":"Sample debug for log file and console"}
    //{"severity":"WARNING","time":"Nov 11, 2018  20:24:11","message":"An warning message example"}
    //{"severity":"INFO","time":"Nov 11, 2018  20:24:11","message":"An info level message"}
}

有什么想法为什么不显示来电者信息吗？

解决方案

根据文档 您可以在创建记录器时执行以下操作：

wlogger := zap.new(core, zap.addcaller())

更新评论答案
您还可以定义调用者编码的实现：

func mycaller(caller zapcore.entrycaller, enc zapcore.primitivearrayencoder) {
    enc.appendstring(filepath.base(caller.fullpath()))
}

并将其传递给cfgconsole和cfgfile

可以帮助您跳过调用者的调用堆栈深度。

// before
zap.New(core, zap.AddCaller())
// output: {"level":"panic","time":"2020-06-09T16:08:25.677+0800","line":"log/log.go:118","msg":"before")}

// add caller skip
zap.New(core, zap.AddCaller(), zap.AddCallerSkip(1))
// output: {"level":"panic","time":"2020-06-09T16:47:39.559+0800","line":"client/client.go:29","msg":"after"}

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