| Server IP : 88.223.91.171 / Your IP : 216.73.216.194 Web Server : LiteSpeed System : Linux id-dci-web1986.main-hosting.eu 5.14.0-611.26.1.el9_7.x86_64 #1 SMP PREEMPT_DYNAMIC Thu Jan 29 05:24:47 EST 2026 x86_64 User : u686484674 ( 686484674) PHP Version : 8.0.30 Disable Function : system, exec, shell_exec, passthru, mysql_list_dbs, ini_alter, dl, symlink, link, chgrp, leak, popen, apache_child_terminate, virtual, mb_send_mail MySQL : OFF | cURL : ON | WGET : ON | Perl : OFF | Python : OFF | Sudo : OFF | Pkexec : OFF Directory : /./proc/thread-self/root/proc/thread-self/root/opt/golang/1.22.0/src/log/slog/ |
Upload File : |
// Copyright 2022 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package slog_test
import (
"context"
"fmt"
"log/slog"
"os"
"path/filepath"
"runtime"
"time"
)
// Infof is an example of a user-defined logging function that wraps slog.
// The log record contains the source position of the caller of Infof.
func Infof(logger *slog.Logger, format string, args ...any) {
if !logger.Enabled(context.Background(), slog.LevelInfo) {
return
}
var pcs [1]uintptr
runtime.Callers(2, pcs[:]) // skip [Callers, Infof]
r := slog.NewRecord(time.Now(), slog.LevelInfo, fmt.Sprintf(format, args...), pcs[0])
_ = logger.Handler().Handle(context.Background(), r)
}
func Example_wrapping() {
replace := func(groups []string, a slog.Attr) slog.Attr {
// Remove time.
if a.Key == slog.TimeKey && len(groups) == 0 {
return slog.Attr{}
}
// Remove the directory from the source's filename.
if a.Key == slog.SourceKey {
source := a.Value.Any().(*slog.Source)
source.File = filepath.Base(source.File)
}
return a
}
logger := slog.New(slog.NewTextHandler(os.Stdout, &slog.HandlerOptions{AddSource: true, ReplaceAttr: replace}))
Infof(logger, "message, %s", "formatted")
// Output:
// level=INFO source=example_wrap_test.go:43 msg="message, formatted"
}