api: fix validation and http response

internal/api/v1/file.go

@@ -48,7 +48,7 @@ func SetFileContent(w http.ResponseWriter, r *http.Request) {
 	// no validation for include files
 
 	if valErr != nil {
-		U.RespondJSON(w, r, valErr, http.StatusBadRequest)
+		U.RespondError(w, valErr, http.StatusBadRequest)
 		return
 	}
 

internal/api/v1/utils/error.go

@@ -4,6 +4,7 @@ import (
 	"net/http"
 
 	E "github.com/yusing/go-proxy/internal/error"
+	"github.com/yusing/go-proxy/internal/utils/strutils/ansi"
 )
 
 // HandleErr logs the error and returns an HTTP error response to the client.
@@ -23,6 +24,13 @@ func HandleErr(w http.ResponseWriter, r *http.Request, origErr error, code ...in
 	http.Error(w, http.StatusText(statusCode), statusCode)
 }
 
+func RespondError(w http.ResponseWriter, err error, code ...int) {
+	if len(code) > 0 {
+		w.WriteHeader(code[0])
+	}
+	WriteBody(w, []byte(ansi.StripANSI(err.Error())))
+}
+
 func ErrMissingKey(k string) error {
 	return E.New("missing key '" + k + "' in query or request body")
 }

internal/api/v1/utils/utils.go

@@ -6,6 +6,7 @@ import (
 	"net/http"
 
 	"github.com/yusing/go-proxy/internal/logging"
+	"github.com/yusing/go-proxy/internal/utils/strutils/ansi"
 )
 
 func WriteBody(w http.ResponseWriter, body []byte) {
@@ -27,13 +28,17 @@ func RespondJSON(w http.ResponseWriter, r *http.Request, data any, code ...int)
 		j = []byte(fmt.Sprintf("%q", data))
 	case []byte:
 		j = data
+	case error:
+		j, err = json.Marshal(ansi.StripANSI(data.Error()))
 	default:
 		j, err = json.MarshalIndent(data, "", "  ")
-		if err != nil {
-			logging.Panic().Err(err).Msg("failed to marshal json")
-			return false
-		}
 	}
+
+	if err != nil {
+		logging.Panic().Err(err).Msg("failed to marshal json")
+		return false
+	}
+
 	_, err = w.Write(j)
 	if err != nil {
 		HandleErr(w, r, err)