APIv4: GET /files/{file_id}/info (#5591)

api4/file.go

@@ -26,6 +26,7 @@ func InitFile() {
 	BaseRoutes.File.Handle("/thumbnail", ApiSessionRequired(getFileThumbnail)).Methods("GET")
 	BaseRoutes.File.Handle("/link", ApiSessionRequired(getFileLink)).Methods("GET")
 	BaseRoutes.File.Handle("/preview", ApiSessionRequired(getFilePreview)).Methods("GET")
+	BaseRoutes.File.Handle("/info", ApiSessionRequired(getFileInfo)).Methods("GET")
 
 }
 
@@ -194,6 +195,27 @@ func getFilePreview(c *Context, w http.ResponseWriter, r *http.Request) {
 	}
 }
 
+func getFileInfo(c *Context, w http.ResponseWriter, r *http.Request) {
+	c.RequireFileId()
+	if c.Err != nil {
+		return
+	}
+
+	info, err := app.GetFileInfo(c.Params.FileId)
+	if err != nil {
+		c.Err = err
+		return
+	}
+
+	if info.CreatorId != c.Session.UserId && !app.SessionHasPermissionToChannelByPost(c.Session, info.PostId, model.PERMISSION_READ_CHANNEL) {
+		c.SetPermissionError(model.PERMISSION_READ_CHANNEL)
+		return
+	}
+
+	w.Header().Set("Cache-Control", "max-age=2592000, public")
+	w.Write([]byte(info.ToJson()))
+}
+
 func writeFileResponse(filename string, contentType string, bytes []byte, w http.ResponseWriter, r *http.Request) *model.AppError {
 	w.Header().Set("Cache-Control", "max-age=2592000, public")
 	w.Header().Set("Content-Length", strconv.Itoa(len(bytes)))