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main.go
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main.go
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package main
import (
"context"
"flag"
"fmt"
"log"
"net"
"net/http"
"os"
"os/signal"
"strconv"
"sync"
"syscall"
"time"
"github.com/axetroy/hooker/internal/app"
"github.com/pkg/errors"
)
func main() {
var (
port int64 = 3000
)
if len(os.Getenv("PORT")) > 0 {
portStr := os.Getenv("PORT")
if p, err := strconv.ParseInt(portStr, 0, 0); err != nil {
err = errors.WithStack(err)
log.Fatalf("%+v\n", err)
} else {
port = p
}
}
flag.Int64Var(&port, "port", port, "The port listening, use with '--port 8080'")
flag.Parse()
s := &http.Server{
Addr: net.JoinHostPort("0.0.0.0", fmt.Sprintf("%d", port)),
Handler: app.Router,
ReadTimeout: 60 * time.Second,
WriteTimeout: 60 * time.Second,
MaxHeaderBytes: 1 << 20, // 10M
}
var wg sync.WaitGroup
// Wait for interrupt signal to gracefully shutdown the server with
// a timeout of 5 seconds.
exit := make(chan os.Signal, 1)
// kill (no param) default send syscall.SIGTERM
// kill -2 is syscall.SIGINT
// kill -9 is syscall.SIGKILL but can't be catch, so don't need add it
signal.Notify(exit, syscall.SIGHUP, syscall.SIGINT, syscall.SIGTERM, syscall.SIGQUIT)
go func() {
<-exit
wg.Add(1)
//使用context控制srv.Shutdown的超时时间
ctx, cancel := context.WithTimeout(context.Background(), 15*time.Second)
defer cancel()
err := s.Shutdown(ctx)
if err != nil {
log.Printf("%+v\n", errors.WithStack(err))
}
wg.Done()
}()
log.Printf("Listen on: %s\n", s.Addr)
if err := s.ListenAndServe(); err != nil {
if err == http.ErrServerClosed {
log.Println("HTTP server closed.")
} else {
log.Printf("%+v\n", err)
}
}
}