line.lde

Line =
  ^""     IP(string)                   " "   # 10.143.71.203
  ^"["    HttpForwardedFor(string)     "]"   # [-]
  ^" ["   SmartLabsSessionID(string)   "]"   # [1607333981]
  ^" "    SmartLabsMacAddress(string)  " "   # 1C:BB:A8:01:A3:65
  ^"["    LocalTime(string)            "]"   # [24/Nov/2017:17:10:29 +0300]
  ^" "    UpstreamCacheStatus(string)  " "   # HIT
  ^""     Request(string)              " "   # GET
  ^""     Url(string)                  " "   # /hls/CH_R01_FRIDAY/1511510400/1511515800.ts/0r2_95670004r8048.ts
  ^""     HttpVersion(string)          " "   # HTTP/1.1
  ^"\""   HttpStatus(string)           "\""  # "200"
  ^" "    BytesSend(string)            " "   # 1513400
  ^""     HlsBufferTotalBytes(string)  " "   # 8388608
  ^""     HlsBufferFreeBytes(string)   " "   # 8084
  ^"\""   HlsChunkDuration(string)     "\""  # "6"
  ^" "    SmartLabsRequestID(string)   " "   # -
  ^""     RequestUniqueID(string)      " "   # 39929-1511532628-916-20448073
  ^"\""   HttpRefer(string)            "\""  # "-"
  ^" \""  HttpUA(string)               "\""  # "Restream/5.20248.170919 (ps7105; PS7105) SmartSDK/1.5.63-rt-25 Qt/4.7.3 API/0.30.0"
  ^" \""  UpstreamAddr(string)         "\""  # "-"
  ^" \""  ServerPort(string)           "\""  # "80"
  ^" \""  ServerHost(string)           "\""  # "178.45.252.45"
  ^" \""  RequestTime(string)          "\""  # "0.192"
  ^" \""  UpstreamResponseTime(string) "\""  # "-"
  ^" \""  RequestSendTime(string)      "\""  # "0"
;

main.go

//go:generate ldetool generate --package main line.lde

package main

import (
	"bufio"
	"log"
	"os"
)

func main() {
	count := 0
	line := &Line{}
	scanner := bufio.NewScanner(os.Stdin)
	for scanner.Scan() {
		ok, err := line.Extract(scanner.Bytes())
		if !ok {
			if err != nil {
				panic(err)
			}
			continue
		}
		if string(line.HttpStatus) == "200" {
			count++
		}
	}
	log.Printf(">>>> 200: %d\n", count)
}