stub

cmd/server/main.go

@@ -2,9 +2,19 @@ package main
 
 import (
 	"context"
+	"flag"
+	"fmt"
 	"io"
+	"log"
+	"net/http"
+	"os"
 	"os/signal"
+	"strings"
 	"syscall"
+	"time"
+
+	"github.com/coder/websocket"
+	"golang.org/x/time/rate"
 )
 
 func main() {
@@ -17,5 +27,119 @@ func main() {
 }
 
 func run(ctx context.Context) error {
+	fs := flag.NewFlagSet(os.Args[0], flag.ContinueOnError)
+	port := fs.Int("p", 8080, "port")
+	if err := fs.Parse(os.Args[1:]); err != nil {
+		return err
+	}
+
+	S := &S{
+		ctx:     ctx,
+		limiter: rate.NewLimiter(10, 10),
+	}
+
+	s := &http.Server{
+		Addr:    fmt.Sprintf(":%d", *port),
+		Handler: S,
+	}
+
+	go func() {
+		<-ctx.Done()
+		ctx, can := context.WithTimeout(context.Background(), time.Second)
+		defer can()
+		s.Shutdown(ctx)
+	}()
+
+	log.Println("listening on", *port)
+	if err := s.ListenAndServe(); err != nil && ctx.Err() == nil {
+		return err
+	}
+	log.Println("shut down")
+	return nil
+}
+
+type S struct {
+	ctx     context.Context
+	limiter *rate.Limiter
+}
+
+func (s *S) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	if err := s.serveHTTP(w, r); err != nil {
+		log.Println(r.URL.Path, "//", err.Error(), r.Header)
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+	}
+}
+
+func (s *S) serveHTTP(w http.ResponseWriter, r *http.Request) error {
+	if isV1(r) || isWS(r) {
+		return s.serveAPI(w, r)
+	}
+	return s.serveStatic(w, r)
+}
+
+func isV1(r *http.Request) bool {
+	return strings.HasPrefix(r.URL.Path, "/v1/")
+}
+
+func isWS(r *http.Request) bool {
+	return r.URL.Path == "/ws" || strings.HasPrefix(r.URL.Path, "/ws/")
+}
+
+func (s *S) serveStatic(w http.ResponseWriter, r *http.Request) error {
+	return fmt.Errorf("not impl static")
+}
+
+func (s *S) serveAPI(w http.ResponseWriter, r *http.Request) error {
+	if err := s.injectContext(w, r); err == io.EOF {
+		http.Redirect(w, r, "/", http.StatusSeeOther)
+		return nil
+	} else if err != nil {
+		return err
+	}
+
+	if isWS(r) {
+		return s.serveWS(w, r)
+	} else if isV1(r) {
+		return s.serveV1(w, r)
+	}
+
+	http.NotFound(w, r)
+	return nil
+}
+
+type Session struct {
+	ID string
+}
+
+func (s *S) injectContext(w http.ResponseWriter, r *http.Request) error {
+	id, err := r.Cookie("uuid")
+	if err != nil || id.Value == "" {
 		return io.EOF
 	}
+	ctx := r.Context()
+	ctx = context.WithValue(ctx, "session", Session{
+		ID: id.Value,
+	})
+	*r = *r.WithContext(ctx)
+	return nil
+}
+
+func (s *S) serveWS(httpw http.ResponseWriter, httpr *http.Request) error {
+	ctx := httpr.Context()
+
+	c, err := websocket.Accept(httpw, httpr, nil)
+	if err != nil {
+		return err
+	}
+	defer c.CloseNow()
+
+	if err := c.Write(ctx, 1, []byte("hello world")); err != nil {
+		return err
+	}
+
+	return fmt.Errorf("not impl")
+}
+
+func (s *S) serveV1(w http.ResponseWriter, r *http.Request) error {
+	return fmt.Errorf("not impl: v1")
+}