Add content-type to API responses

internal/api/api.go

@@ -88,6 +88,30 @@ func HandleFunc(pattern string, handler http.HandlerFunc) {
 	http.HandleFunc(pattern, handler)
 }
 
+// ResponseJSON important always add Content-Type
+// so go won't need to call http.DetectContentType
+func ResponseJSON(w http.ResponseWriter, v any) {
+	w.Header().Set("Content-Type", "application/json")
+	_ = json.NewEncoder(w).Encode(v)
+}
+
+func ResponsePrettyJSON(w http.ResponseWriter, v any) {
+	w.Header().Set("Content-Type", "application/json")
+	enc := json.NewEncoder(w)
+	enc.SetIndent("", "  ")
+	_ = enc.Encode(v)
+}
+
+func ResponseRawJSON(w http.ResponseWriter, s string) {
+	w.Header().Set("Content-Type", "application/json")
+	_, _ = w.Write([]byte(s))
+}
+
+func ResponseText(w http.ResponseWriter, b []byte) {
+	w.Header().Set("Content-Type", "text/plain")
+	_, _ = w.Write(b)
+}
+
 const StreamNotFound = "stream not found"
 
 var basePath string
@@ -131,9 +155,7 @@ func apiHandler(w http.ResponseWriter, r *http.Request) {
 	app.Info["host"] = r.Host
 	mu.Unlock()
 
-	if err := json.NewEncoder(w).Encode(app.Info); err != nil {
-		log.Warn().Err(err).Caller().Send()
-	}
+	ResponseJSON(w, app.Info)
 }
 
 func exitHandler(w http.ResponseWriter, r *http.Request) {
@@ -158,11 +180,10 @@ func ResponseStreams(w http.ResponseWriter, streams []Stream) {
 		return
 	}
 
-	var response struct {
+	var response = struct {
 		Streams []Stream `json:"streams"`
+	}{
+		Streams: streams,
 	}
-	response.Streams = streams
-	if err := json.NewEncoder(w).Encode(response); err != nil {
-		http.Error(w, err.Error(), http.StatusInternalServerError)
-	}
+	ResponseJSON(w, response)
 }

internal/api/config.go

@@ -21,9 +21,7 @@ func configHandler(w http.ResponseWriter, r *http.Request) {
 			http.Error(w, "", http.StatusNotFound)
 			return
 		}
-		if _, err = w.Write(data); err != nil {
-			log.Warn().Err(err).Caller().Send()
-		}
+		ResponseText(w, data)
 
 	case "POST", "PATCH":
 		data, err := io.ReadAll(r.Body)

internal/debug/stack.go

@@ -3,6 +3,7 @@ package debug
 import (
 	"bytes"
 	"fmt"
+	"github.com/AlexxIT/go2rtc/internal/api"
 	"net/http"
 	"runtime"
 )
@@ -51,7 +52,5 @@ func stackHandler(w http.ResponseWriter, r *http.Request) {
 		"Total: %d, Skipped: %d", runtime.NumGoroutine(), skipped),
 	)
 
-	if _, err := w.Write(buf[:i]); err != nil {
-		panic(err)
-	}
+	api.ResponseText(w, buf[:i])
 }

internal/hass/api.go

@@ -3,6 +3,7 @@ package hass
 import (
 	"encoding/base64"
 	"encoding/json"
+	"github.com/AlexxIT/go2rtc/internal/api"
 	"github.com/AlexxIT/go2rtc/internal/streams"
 	"github.com/AlexxIT/go2rtc/internal/webrtc"
 	"net"
@@ -11,8 +12,7 @@ import (
 )
 
 func apiOK(w http.ResponseWriter, r *http.Request) {
-	w.Header().Set("Content-Type", "application/json")
-	_, _ = w.Write([]byte(`{"status":1,"payload":{}}`))
+	api.ResponseRawJSON(w, `{"status":1,"payload":{}}`)
 }
 
 func apiStream(w http.ResponseWriter, r *http.Request) {

internal/homekit/api.go

@@ -1,8 +1,8 @@
 package homekit
 
 import (
-	"encoding/json"
 	"fmt"
+	"github.com/AlexxIT/go2rtc/internal/api"
 	"github.com/AlexxIT/go2rtc/internal/app/store"
 	"github.com/AlexxIT/go2rtc/internal/streams"
 	"github.com/AlexxIT/go2rtc/pkg/hap"
@@ -54,7 +54,7 @@ func apiHandler(w http.ResponseWriter, r *http.Request) {
 			items = append(items, device)
 		}
 
-		_ = json.NewEncoder(w).Encode(items)
+		api.ResponseJSON(w, items)
 
 	case "POST":
 		// TODO: post params...
@@ -64,14 +64,14 @@ func apiHandler(w http.ResponseWriter, r *http.Request) {
 		name := r.URL.Query().Get("name")
 		if err := hkPair(id, pin, name); err != nil {
 			log.Error().Err(err).Caller().Send()
-			_, err = w.Write([]byte(err.Error()))
+			http.Error(w, err.Error(), http.StatusInternalServerError)
 		}
 
 	case "DELETE":
 		src := r.URL.Query().Get("src")
 		if err := hkDelete(src); err != nil {
 			log.Error().Err(err).Caller().Send()
-			_, err = w.Write([]byte(err.Error()))
+			http.Error(w, err.Error(), http.StatusInternalServerError)
 		}
 	}
 }

internal/streams/init.go

@@ -1,7 +1,6 @@
 package streams
 
 import (
-	"encoding/json"
 	"github.com/AlexxIT/go2rtc/internal/api"
 	"github.com/AlexxIT/go2rtc/internal/app"
 	"github.com/AlexxIT/go2rtc/internal/app/store"
@@ -81,16 +80,14 @@ func streamsHandler(w http.ResponseWriter, r *http.Request) {
 
 	// without source - return all streams list
 	if src == "" && r.Method != "POST" {
-		_ = json.NewEncoder(w).Encode(streams)
+		api.ResponseJSON(w, streams)
 		return
 	}
 
 	// Not sure about all this API. Should be rewrited...
 	switch r.Method {
 	case "GET":
-		e := json.NewEncoder(w)
-		e.SetIndent("", "  ")
-		_ = e.Encode(streams[src])
+		api.ResponsePrettyJSON(w, streams[src])
 
 	case "PUT":
 		name := query.Get("name")
@@ -121,7 +118,7 @@ func streamsHandler(w http.ResponseWriter, r *http.Request) {
 				if err := stream.Play(src); err != nil {
 					http.Error(w, err.Error(), http.StatusInternalServerError)
 				} else {
-					_ = json.NewEncoder(w).Encode(stream)
+					api.ResponseJSON(w, stream)
 				}
 			} else {
 				http.Error(w, "", http.StatusNotFound)

internal/webtorrent/init.go

@@ -141,7 +141,7 @@ func apiHandle(w http.ResponseWriter, r *http.Request) {
 
 		w.WriteHeader(http.StatusCreated)
 		data := fmt.Sprintf(`{"share":%q,"pwd":%q}`, share, pwd)
-		_, _ = w.Write([]byte(data))
+		api.ResponseRawJSON(w, data)
 
 	case "DELETE":
 		if ok {