Added dummy auth example

cmd/hwtc/main.go

@@ -7,6 +7,9 @@ import (
 	"os"
 	"strings"
 
+	"github.com/twitchtv/twirp"
+
+	"mcquay.me/hwt"
 	pb "mcquay.me/hwt/rpc/hwt"
 )
 
@@ -20,8 +23,17 @@ func main() {
 
 	c := pb.NewHelloWorldProtobufClient(fmt.Sprintf("http://%s", os.Args[1]), &http.Client{})
 
+	h := http.Header{}
+	h.Set("sm-auth", hwt.PSK)
+	ctx := context.Background()
+	ctx, err := twirp.WithHTTPRequestHeaders(ctx, h)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "setting twirp headers: %v\n", err)
+		os.Exit(1)
+	}
+
 	for i := 0; ; i++ {
-		resp, err := c.Hello(context.Background(), &pb.HelloReq{Subject: strings.Join(os.Args[2:], " ")})
+		resp, err := c.Hello(ctx, &pb.HelloReq{Subject: strings.Join(os.Args[2:], " ")})
 		if err != nil {
 			fmt.Fprintf(os.Stderr, "hello: %#v\n", err)
 			os.Exit(1)

cmd/hwtd/main.go

@@ -26,7 +26,7 @@ func main() {
 	hs := hwt.NewMetricsHooks(metrics.HTTPLatency)
 	th := pb.NewHelloWorldServer(s, hs)
 	sm := http.NewServeMux()
-	sm.Handle("/", th)
+	sm.HandleFunc("/", hwt.Auth(th.ServeHTTP))
 	sm.Handle("/metrics", promhttp.Handler())
 	if err := http.ListenAndServe(":8080", sm); err != nil {
 		log.Fatalf("listen and serve: %v", err)