split the cdn access log items

split-cdn-access-log-items.go

package main

import (
	"bufio"
	"fmt"
	"os"
	"strings"
)

/*
223.247.160.139 - 32 [11/Dec/2016:23:43:04 +0800] "GET http://static3.hifun.mobi/video/2016/11/11/dc8d031b7fcdf0801509b9af04d6bb8b.mp4?vframe/jpg/offset/1/w/0/h/0/rotate/auto HTTP/1.1" 200 20469 "-" "Dalvik/2.1.0 (Linux; U; Android 6.0; Letv X500 Build/DBXCNOP5801810092S)"
*/
func main() {
	input := os.Stdin
	bScanner := bufio.NewScanner(input)
	for bScanner.Scan() {
		line := bScanner.Text()
		split(line, " ")
	}
}

func split(line string, delimiter string) {
	if line == "" {
		//just ignore empty line
		return
	}
	items := strings.SplitN(line, delimiter, 2)

	val := strings.Trim(items[0], "[]\"")
	fmt.Print(val)

	next := strings.TrimSpace(items[1])
	if next != "" {
		fmt.Print("\t")
		//fmt.Println(next)
	}
	if strings.HasPrefix(next, "[") {
		split(next[1:], "]")
	} else if strings.HasPrefix(next, "\"") {
		split(next[1:], "\"")
	} else {
		split(next, " ")
	}

}