forked from freeformz/spew
/
main.go
83 lines (71 loc) · 1.58 KB
/
main.go
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package main
import (
"fmt"
"log"
"math/rand"
"os"
"strconv"
"strings"
"time"
)
const (
defaultMsgSize = 32
defaultSeed = 8675309
defaultRate = 1 * time.Second
)
var bytes = []byte("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789!@#$%^&*()-_=+{}[]|\\;:'<>,./?")
func randStr(buf []byte) string {
for i := 0; i < len(buf); i++ {
buf[i] = bytes[rand.Intn(len(bytes))]
}
return string(buf)
}
func parseRate(rate string) (time.Duration, error) {
var duration time.Duration
var err error
num := int64(1)
bits := strings.Split(rate, "/")
if len(bits) == 2 {
duration, err = time.ParseDuration(bits[1])
if err != nil {
return defaultRate, err
}
num, err = strconv.ParseInt(bits[0], 10, 32)
if err != nil {
return defaultRate, err
}
} else {
num = 1
duration, err = time.ParseDuration(rate)
}
return time.Duration(int64(duration) / num), nil
}
func main() {
var i = 0
var buf []byte
// Repeatable payloads.
if seed, err := strconv.ParseInt(os.Getenv("SEED"), 10, 32); err == nil {
rand.Seed(seed)
} else {
rand.Seed(defaultSeed)
}
sleepTime, err := parseRate(os.Getenv("RATE"))
if err != nil {
log.Println("Duration Parsing: ", err)
log.Println("Continuing w/o duration")
}
mlen, err := strconv.ParseInt(os.Getenv("MSGSIZE"), 10, 32)
if err == nil && mlen > 0 {
buf = make([]byte, mlen)
} else {
log.Println("Unable to parse MSGSIZE, defaulting to MSGSIZE of", defaultMsgSize)
buf = make([]byte, defaultMsgSize)
}
for {
i++
if sleepTime > 0 {
time.Sleep(sleepTime)
}
fmt.Println(i, "spews", randStr(buf))
}
}