/
main.go
141 lines (119 loc) · 3.63 KB
/
main.go
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package main
import (
"encoding/json"
"flag"
"fmt"
"log"
"os"
"strconv"
"strings"
"time"
"github.com/hirokazumiyaji/goflake"
"github.com/ugorji/go/codec"
"github.com/valyala/fasthttp"
)
const version = "0.0.1"
var mh = &codec.MsgpackHandle{RawToString: true}
func main() {
var (
ip string
port int
startTime string
datacenterID int
workerID int
retry int
err error
)
defaultIP := os.Getenv("IP_ADDR")
if defaultIP == "" {
defaultIP = "127.0.0.1"
}
flag.StringVar(&ip, "addr", defaultIP, "ip address (default 127.0.0.1)")
flag.StringVar(&ip, "a", defaultIP, "ip address (short)")
defaultPort := 8000
if v := os.Getenv("PORT"); v != "" {
defaultPort, err = strconv.Atoi(v)
if err != nil {
log.Fatalf("port value type not integer. %v\n", err)
}
}
flag.IntVar(&port, "port", defaultPort, "port to use (default 8000)")
flag.IntVar(&port, "p", defaultPort, "port to use (short)")
defaultStartTime := os.Getenv("START_TIME")
if defaultStartTime == "" {
defaultStartTime = "2016-01-01 00:00:00 +0000"
}
flag.StringVar(&startTime, "start-time", defaultStartTime, "id generate start time (default '2016-01-01 00:00:00 +0000')")
flag.StringVar(&startTime, "s", defaultStartTime, "id generate start time (short)")
defaultDatacenterID := 1
if v := os.Getenv("DATACENTER_ID"); v != "" {
defaultDatacenterID, err = strconv.Atoi(v)
if err != nil {
log.Fatalf("datacenter id value type not integer. %v\n", err)
}
}
flag.IntVar(&datacenterID, "datacenter-id", defaultDatacenterID, "datacenter id (default 1)")
flag.IntVar(&datacenterID, "d", defaultDatacenterID, "datacenter id (short)")
defaultWorkerID := 1
if v := os.Getenv("WORKER_ID"); v != "" {
defaultWorkerID, err = strconv.Atoi(v)
if err != nil {
log.Fatalf("worker id value type not integer. %v\n", err)
}
}
flag.IntVar(&workerID, "worker-id", defaultWorkerID, "worker id (default 1)")
flag.IntVar(&workerID, "w", defaultWorkerID, "worker id (short)")
defaultRetry := 5
if v := os.Getenv("RETRY"); v != "" {
defaultRetry, err = strconv.Atoi(v)
if err != nil {
log.Fatalf("retry value type not integer. %v\n", err)
}
}
flag.IntVar(&retry, "retry", defaultRetry, "generate id retry count (default 5)")
flag.IntVar(&retry, "r", defaultRetry, "generate id retry count (short)")
flag.Parse()
t, err := time.Parse("2006-01-02 15:04:05 -0700", startTime)
if err != nil {
log.Fatalf("start time parse error. %v\n", err)
}
idWorker, err := goflake.NewIdWorker(uint16(datacenterID), uint16(workerID), t)
if err != nil {
log.Fatalf("could not create id worker. %v\n", err)
}
m := func(ctx *fasthttp.RequestCtx) {
if strings.HasPrefix(string(ctx.Path()), "/id") {
idHandlerFunc(ctx, idWorker, retry)
} else {
ctx.Error("", fasthttp.StatusNotFound)
}
}
log.Fatal(fasthttp.ListenAndServe(fmt.Sprintf("%s:%d", ip, port), m))
}
func idHandlerFunc(ctx *fasthttp.RequestCtx, idWorker *goflake.IdWorker, retry int) {
ua := string(ctx.UserAgent())
var (
id uint64
err error
)
for i := 0; i < retry; i++ {
id, err = idWorker.GetId(ua)
if err == nil {
break
}
}
r := map[string]string{
"id": strconv.FormatUint(id, 10),
}
if strings.HasSuffix(string(ctx.Path()), ".msgpack") {
ctx.SetContentType("application/x-msgpack; charset=UTF-8")
if err := codec.NewEncoder(ctx, mh).Encode(r); err != nil {
ctx.Error(err.Error(), fasthttp.StatusInternalServerError)
}
} else {
ctx.SetContentType("application/json; charset=UTF-8")
if err := json.NewEncoder(ctx).Encode(r); err != nil {
ctx.Error(fmt.Sprintf(`{"error":"%v"}`, err.Error()), fasthttp.StatusInternalServerError)
}
}
}