mirror of
https://github.com/imgproxy/imgproxy.git
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Global refactoring
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85
logger/syslog.go
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85
logger/syslog.go
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@@ -0,0 +1,85 @@
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package logger
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import (
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"fmt"
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"log/syslog"
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"os"
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"github.com/imgproxy/imgproxy/v2/config/configurators"
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"github.com/sirupsen/logrus"
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)
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var (
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syslogLevels = map[string]logrus.Level{
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"crit": logrus.FatalLevel,
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"error": logrus.ErrorLevel,
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"warning": logrus.WarnLevel,
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"info": logrus.InfoLevel,
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}
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)
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type syslogHook struct {
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writer *syslog.Writer
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levels []logrus.Level
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formatter logrus.Formatter
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}
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func isSyslogEnabled() (enabled bool) {
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configurators.Bool(&enabled, "IMGPROXY_SYSLOG_ENABLE")
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return
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}
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func newSyslogHook() (*syslogHook, error) {
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var (
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network, addr string
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level logrus.Level
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tag = "imgproxy"
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levelStr = "notice"
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)
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configurators.String(&network, "IMGPROXY_SYSLOG_NETWORK")
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configurators.String(&addr, "IMGPROXY_SYSLOG_ADDRESS")
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configurators.String(&tag, "IMGPROXY_SYSLOG_TAG")
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configurators.String(&levelStr, "IMGPROXY_SYSLOG_LEVEL")
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if l, ok := syslogLevels[levelStr]; ok {
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level = l
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} else {
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level = logrus.InfoLevel
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logrus.Warningf("Syslog level '%s' is invalid, 'info' is used", levelStr)
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}
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w, err := syslog.Dial(network, addr, syslog.LOG_NOTICE, tag)
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return &syslogHook{
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writer: w,
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levels: logrus.AllLevels[:int(level)+1],
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formatter: &structuredFormatter{},
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}, err
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}
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func (hook *syslogHook) Fire(entry *logrus.Entry) error {
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line, err := hook.formatter.Format(entry)
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if err != nil {
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fmt.Fprintf(os.Stderr, "Unable to read entry, %v\n", err)
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return err
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}
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switch entry.Level {
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case logrus.PanicLevel, logrus.FatalLevel:
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return hook.writer.Crit(string(line))
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case logrus.ErrorLevel:
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return hook.writer.Err(string(line))
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case logrus.WarnLevel:
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return hook.writer.Warning(string(line))
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case logrus.InfoLevel:
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return hook.writer.Info(string(line))
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default:
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return nil
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}
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}
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func (hook *syslogHook) Levels() []logrus.Level {
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return hook.levels
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}
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