cors support.

closes #40

go.mod

@@ -10,6 +10,7 @@ require (
 	github.com/kelseyhightower/envconfig v1.4.0
 	github.com/lib/pq v1.10.3
 	github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646
+	github.com/rs/cors v1.7.0
 	github.com/rs/zerolog v1.23.0
 	github.com/tidwall/sjson v1.1.7
 )

go.sum

@@ -650,6 +650,7 @@ github.com/prometheus/tsdb v0.7.1/go.mod h1:qhTCs0VvXwvX/y3TZrWD7rabWM+ijKTux40T
 github.com/rogpeppe/fastuuid v0.0.0-20150106093220-6724a57986af/go.mod h1:XWv6SoW27p1b0cqNHllgS5HIMJraePCO15w5zCzIWYg=
 github.com/rogpeppe/fastuuid v1.2.0/go.mod h1:jVj6XXZzXRy/MSR5jhDC/2q6DgLz+nrA6LYCDYWNEvQ=
 github.com/rogpeppe/go-internal v1.3.0/go.mod h1:M8bDsm7K2OlrFYOpmOWEs/qY81heoFRclV5y23lUDJ4=
+github.com/rs/cors v1.7.0 h1:+88SsELBHx5r+hZ8TCkggzSstaWNbDvThkVK8H6f9ik=
 github.com/rs/cors v1.7.0/go.mod h1:gFx+x8UowdsKA9AchylcLynDq+nNFfI8FkUZdN/jGCU=
 github.com/rs/xid v1.2.1/go.mod h1:+uKXf+4Djp6Md1KODXJxgGQPKngRmWyn10oCKFzNHOQ=
 github.com/rs/zerolog v1.13.0/go.mod h1:YbFCdg8HfsridGWAh22vktObvhZbQsZXe4/zB0OKkWU=

main.go

@@ -13,6 +13,7 @@ import (
 	"github.com/gorilla/mux"
 	"github.com/kelseyhightower/envconfig"
 	_ "github.com/lib/pq"
+	"github.com/rs/cors"
 	"github.com/rs/zerolog"
 )
 
@@ -32,10 +33,12 @@ type Settings struct {
 	TorProxyURL  string `envconfig:"TOR_PROXY_URL"`
 }
 
-var s Settings
-var db *pebble.DB
-var router = mux.NewRouter()
-var log = zerolog.New(os.Stderr).Output(zerolog.ConsoleWriter{Out: os.Stderr})
+var (
+	s      Settings
+	db     *pebble.DB
+	router = mux.NewRouter()
+	log    = zerolog.New(os.Stderr).Output(zerolog.ConsoleWriter{Out: os.Stderr})
+)
 
 //go:embed index.html
 var indexHTML string
@@ -139,7 +142,7 @@ func main() {
 	api.HandleFunc("/users/{name}@{domain}", DeleteUser).Methods("DELETE")
 
 	srv := &http.Server{
-		Handler:      router,
+		Handler:      cors.Default().Handler(router),
 		Addr:         s.Host + ":" + s.Port,
 		WriteTimeout: 15 * time.Second,
 		ReadTimeout:  15 * time.Second,