[performance] http response encoding / writing improvements (#2374)

internal/api/client/media/mediacreate.go

@@ -139,7 +139,7 @@ func (m *Module) MediaCreatePOSTHandler(c *gin.Context) {
 		apiAttachment.URL = nil
 	}
 
-	c.JSON(http.StatusOK, apiAttachment)
+	apiutil.JSON(c, http.StatusOK, apiAttachment)
 }
 
 func validateCreateMedia(form *apimodel.AttachmentRequest) error {

internal/api/client/media/mediaget.go

@@ -98,5 +98,5 @@ func (m *Module) MediaGETHandler(c *gin.Context) {
 		return
 	}
 
-	c.JSON(http.StatusOK, attachment)
+	apiutil.JSON(c, http.StatusOK, attachment)
 }

internal/api/client/media/mediaupdate.go

@@ -141,7 +141,7 @@ func (m *Module) MediaPUTHandler(c *gin.Context) {
 		return
 	}
 
-	c.JSON(http.StatusOK, attachment)
+	apiutil.JSON(c, http.StatusOK, attachment)
 }
 
 func validateUpdateMedia(form *apimodel.AttachmentUpdateRequest) error {