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server.go
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server.go
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package main
import (
"flag"
"log"
"net/http"
"os"
"os/signal"
"path/filepath"
"time"
"github.com/cshyun7015/gnp/ch09/handlers"
"github.com/cshyun7015/gnp/ch09/middleware"
)
var (
addr = flag.String("listen", "127.0.0.1:8080", "listen address")
cert = flag.String("cert", "", "certificate")
pkey = flag.String("key", "", "private key")
files = flag.String("files", "./files", "static file directory")
)
func main() {
flag.Parse()
err := run(*addr, *files, *cert, *pkey)
if err != nil {
log.Fatal(err)
}
log.Println("Server stopped")
}
func run(addr, files, cert, pkey string) error {
mux := http.NewServeMux()
mux.Handle("/static/",
http.StripPrefix("/static/",
middleware.RestrictPrefix(
".", http.FileServer(http.Dir("./files")),
),
),
)
mux.Handle("/",
handlers.Methods{
http.MethodGet: http.HandlerFunc(
func(w http.ResponseWriter, r *http.Request) {
if pusher, ok := w.(http.Pusher); ok {
targets := []string{
"/static/style.css",
"/static/hiking.svg",
}
for _, target := range targets {
if err := pusher.Push(target, nil); err != nil {
log.Printf("%s push failed: %v", target, err)
}
}
}
http.ServeFile(w, r, filepath.Join(files, "index.html"))
},
),
},
)
srv := &http.Server{
Addr: addr,
Handler: mux,
IdleTimeout: time.Minute,
ReadHeaderTimeout: 30 * time.Second,
}
go func() {
c := make(chan os.Signal, 1)
signal.Notify(c, os.Interrupt)
for {
if <-c == os.Interrupt {
_ = srv.Close()
return
}
}
}()
log.Printf("Serving files in %q over %s\n", files, srv.Addr)
var err error
if cert != "" && pkey != "" {
log.Println("TLS enabled")
err = srv.ListenAndServeTLS(cert, pkey)
} else {
err = srv.ListenAndServe()
}
if err == http.ErrServerClosed {
err = nil
}
return err
}