Add Access-Control-Allow-Origin and friends

cmd/eksterd/main.go

@@ -26,7 +26,6 @@ import (
 	"regexp"
 	"time"
 
-	"cloud.google.com/go/profiler"
 	"github.com/gomodule/redigo/redis"
 
 	"p83.nl/go/ekster/pkg/microsub"
@@ -60,17 +59,6 @@ func newPool(addr string) *redis.Pool {
 }
 
 func main() {
-
-	if os.Getenv("GOOGLE_APPLICATION_CREDENTIALS") != "" {
-		if err := profiler.Start(profiler.Config{
-			Service:        "microsub-server",
-			ServiceVersion: "1.0",
-			ProjectID:      "microsub-server", // optional on GCP
-		}); err != nil {
-			log.Fatalf("Cannot start the profiler: %v", err)
-		}
-	}
-
 	log.Println("eksterd - microsub server")
 	flag.Parse()
 

cmd/eksterd/microsub.go

@@ -63,6 +63,13 @@ func (h *microsubHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		}
 	}
 
+	if r.Method == http.MethodOptions {
+		w.Header().Add("Access-Control-Allow-Origin", "*")
+		w.Header().Add("Access-Control-Allow-Methods", "GET, POST")
+		w.Header().Add("Access-Control-Allow-Headers", "Authorization")
+		return
+	}
+
 	if r.Method == http.MethodGet {
 		values := r.URL.Query()
 		action := values.Get("action")
@@ -74,6 +81,7 @@ func (h *microsubHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 			}
 			jw := json.NewEncoder(w)
 			w.Header().Add("Content-Type", "application/json")
+			w.Header().Add("Access-Control-Allow-Origin", "*")
 			err = jw.Encode(map[string][]microsub.Channel{
 				"channels": channels,
 			})
@@ -89,6 +97,7 @@ func (h *microsubHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 			}
 			jw := json.NewEncoder(w)
 			w.Header().Add("Content-Type", "application/json")
+			w.Header().Add("Access-Control-Allow-Origin", "*")
 			jw.SetIndent("", "    ")
 			jw.SetEscapeHTML(false)
 			err = jw.Encode(timeline)