64 lines
1.3 KiB
Go
64 lines
1.3 KiB
Go
package main
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import (
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"encoding/json"
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"fmt"
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"io"
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"text/template"
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"time"
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"gopkg.in/mcuadros/go-syslog.v2/format"
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)
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// Formatter is an interface, so that multiple implementations can exist
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type Formatter func(format.LogParts) string
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var tmplFuncs template.FuncMap
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var syslogTmpl *template.Template
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func init() {
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tmplFuncs := template.FuncMap{
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"dateFormat": func(dt time.Time, fmt string) string {
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return dt.Format(fmt)
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},
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"rfc822": func(dt time.Time) string {
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return dt.Format(time.RFC822)
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},
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}
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syslogTmpl = template.Must(template.New("syslog").Funcs(tmplFuncs).Parse(
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"{{rfc822 (index . \"timestamp\")}} {{index . \"hostname\"}} " +
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"{{index . \"app_name\"}}" +
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"{{ if (ne (index . \"proc_id\") \"-\")}}[{{index . \"proc_id\"}}]{{end}}: " +
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"{{index . \"message\"}}",
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))
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}
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type renderFormat int
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func parseRenderFormat(s string) (renderFormat, error) {
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switch s {
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case "json":
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return formatJSON, nil
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case "syslog":
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return formatSyslog, nil
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default:
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return 0, fmt.Errorf("Undefined format `%s`", s)
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}
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}
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const (
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formatSyslog = iota // 0
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formatJSON = iota
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)
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func writeFormatted(w io.Writer, f renderFormat, msg format.LogParts) error {
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switch f {
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case formatSyslog:
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return syslogTmpl.Execute(w, msg)
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case formatJSON:
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enc := json.NewEncoder(w)
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enc.SetIndent("", " ")
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return enc.Encode(msg)
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}
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return nil
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}
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