slog
Hertz 对接 slog 和 lumberjack。
Logger 结构体
var _ hlog.FullLogger = (*Logger)(nil)
type Logger struct {
l *slog.Logger
cfg *config
}
NewLogger
通过 defaultConfig()
创建并初始化一个 Logger,便于后续的调用,可将所需配置作为参数传入函数,若不传入参数则安装初始配置创建 Logger
相关配置请参考后面的 option 的配置
目前只支持 slog 库里的 slog.NewJSONHandler()
,不支持 slog.NewTextHandler()
函数签名:
func NewLogger(opts ...Option) *Logger
示例代码:
package main
import (
"github.com/cloudwego/hertz/pkg/common/hlog"
hertzslog "github.com/hertz-contrib/logger/slog"
"os"
)
func main() {
logger := hertzslog.NewLogger(hertzslog.WithOutput(os.Stdout))
hlog.SetLogger(logger)
}
Logger
Logger
用于获取 *slog.Logger
以满足复杂操作
函数签名:
func (l *Logger) Logger() *slog.Logger
示例代码:
package main
import (
hertzslog "github.com/hertz-contrib/logger/slog"
"os"
)
func main() {
logger := hertzslog.NewLogger(hertzslog.WithOutput(os.Stdout))
l := logger.Logger()
}
Option 的相关配置
WithOutput
WithOutput
用来设置日志的输出位置
函数签名:
func WithOutput(writer io.Writer) Option
示例代码:
package main
import (
hertzslog "github.com/hertz-contrib/logger/slog"
"os"
)
func main() {
logger := hertzslog.NewLogger(hertzslog.WithOutput(os.Stdout))
}
WithLevel
WithLevel
对传入的 *slog.LevelVar
进行判断,高于或等于这个日志级别的才会被记录
值得注意的是,如果
WithLevel
与WithHandlerOptions
一起设置,WithLevel 的日志等级会覆盖掉 WithHandlerOptions 中的日志等级
函数签名:
func WithLevel(lvl *slog.LevelVar) Option
示例代码:
package main
import (
hertzslog "github.com/hertz-contrib/logger/slog"
)
func main() {
// 空的 LevelVar 对应 LevelInfo
logger := hertzslog.NewLogger(hertzslog.WithLevel(&slog.LevelVar{}))
// 动态设置日志登记为 LevelDebug
levelVar := slog.LevelVar{}
levelVar.Set(slog.LevelDebug)
logger := hertzslog.NewLogger(hertzslog.WithLevel(&slog.LevelVar{}))
}
WithHandlerOptions
WithHandlerOptions
将 *slog.HandlerOptions
传入配置
函数名称:
func WithHandlerOptions(opts *slog.HandlerOptions) Option
示例代码:
package main
import (
hertzslog "github.com/hertz-contrib/logger/slog"
)
func main() {
logger := hertzslog.NewLogger(hertzslog.WithHandlerOptions(&slog.HandlerOptions{
AddSource: false,
Level: slog.LevelInfo,
ReplaceAttr: nil,
}))
}
一个完整的 slog 示例
package main
import (
"context"
"log"
"os"
"path"
"time"
"github.com/cloudwego/hertz/pkg/app"
"github.com/cloudwego/hertz/pkg/app/server"
"github.com/cloudwego/hertz/pkg/common/hlog"
"github.com/cloudwego/hertz/pkg/protocol/consts"
hertzslog "github.com/hertz-contrib/logger/slog"
"gopkg.in/natefinch/lumberjack.v2"
)
func main() {
h := server.Default()
// 可定制的输出目录。
var logFilePath string
dir := "./hlog"
logFilePath = dir + "/logs/"
if err := os.MkdirAll(logFilePath, 0o777); err != nil {
log.Println(err.Error())
return
}
// 将文件名设置为日期
logFileName := time.Now().Format("2006-01-02") + ".log"
fileName := path.Join(logFilePath, logFileName)
if _, err := os.Stat(fileName); err != nil {
if _, err := os.Create(fileName); err != nil {
log.Println(err.Error())
return
}
}
logger := hertzslog.NewLogger()
// 提供压缩和删除
lumberjackLogger := &lumberjack.Logger{
Filename: fileName,
MaxSize: 20, // 一个文件最大可达 20M。
MaxBackups: 5, // 最多同时保存 5 个文件。
MaxAge: 10, // 一个文件最多可以保存 10 天。
Compress: true, // 用 gzip 压缩。
}
logger.SetOutput(lumberjackLogger)
logger.SetLevel(hlog.LevelDebug)
hlog.SetLogger(logger)
h.GET("/hello", func(ctx context.Context, c *app.RequestContext) {
hlog.Info("Hello, hertz")
c.String(consts.StatusOK, "Hello hertz!")
})
h.Spin()
}
适配 hlog 的接口的方法等更多用法详见 hertz-contrib/logger/slog
最后修改
July 29, 2024
: docs(hertz): unified `app.HandlerFunc` style (#1112) (451f476)