added timestamp_epoch_to_human.go

timestamp_epoch_to_human.go

@@ -0,0 +1,101 @@
+///bin/sh -c true; exec /usr/bin/env go run "$0" "$@"
+//  vim:ts=4:sts=4:sw=4:noet
+//
+//  Author: Hari Sekhon
+//  Date: 2023-06-14 22:44:00 +0100 (Wed, 14 Jun 2023)
+//
+//  https://github.com/HariSekhon/DevOps-Golang-tools
+//
+//  License: see accompanying Hari Sekhon LICENSE file
+//
+//  If you're using my code you're welcome to connect with me on LinkedIn and optionally send me feedback to help steer this or other code I publish
+//
+//  https://www.linkedin.com/in/HariSekhon
+//
+
+package main
+
+import (
+	"bufio"
+	"flag"
+	"fmt"
+	"log"
+	"os"
+	"path"
+	"regexp"
+	"strconv"
+	"strings"
+	"time"
+)
+
+const description = `
+Converts epoch timestamp from logs such as External Secrets pod logs into a human readable format
+
+Works like a standard unix filter program - takes either a filename or standard input and prints to standard output replacing the epoch with human readable time
+`
+
+var prog = path.Base(os.Args[0])
+
+func readline() string {
+	in := bufio.NewReader(os.Stdin)
+	line, err := in.ReadString('\n')
+	if err != nil {
+		log.Fatal(err)
+	}
+	line = strings.TrimSpace(line)
+	return line
+}
+
+func main() {
+	flag.Usage = func() {
+		fmt.Fprintf(os.Stderr, "%s\n\nusage: %s [<file>]\n\n", description, prog)
+		flag.PrintDefaults()
+		os.Exit(3)
+	}
+	//var debug = flag.Bool("D", false, "Debug mode")
+	flag.Parse()
+	//if *debug || os.Getenv("DEBUG") != "" {
+	//    log.SetLevel(log.DebugLevel)
+	//    log.Debug("debug logging enabled")
+	//}
+
+	var scanner *bufio.Scanner
+	if len(os.Args) > 1 {
+		filename := os.Args[1]
+		filehandle, err := os.Open(filename)
+		if err != nil {
+			//fmt.Fprintf(os.Stderr, "error: %s\n", err)
+			//os.Exit(1)
+			log.Fatal(err)
+		}
+		defer filehandle.Close()
+		scanner = bufio.NewScanner(filehandle)
+	} else {
+		scanner = bufio.NewScanner(os.Stdin)
+	}
+
+	re := regexp.MustCompile(`\b\d{10}(?:\.\d{1,7})?\b`)
+
+	for scanner.Scan() {
+		line := scanner.Text()
+		matches := re.FindAllString(line, -1)
+		for _, match := range matches {
+			epoch, err := strconv.ParseFloat(match, 64)
+			if err == nil {
+				seconds := int64(epoch)
+				milliseconds := int64((epoch - float64(seconds)) * 1000)
+
+				t := time.Unix(seconds, milliseconds*int64(time.Millisecond))
+				//convertedTime := t.Format("2006-01-02 15:04:05.000")
+				convertedTime := t.Format(time.RFC3339)
+
+				line = strings.Replace(line, match, convertedTime, 1)
+			}
+		}
+		fmt.Println(line)
+	}
+
+	if err := scanner.Err(); err != nil {
+		log.Fatal(err)
+	}
+}