refs GW-318: limit file upoload size from gcs

- Add FILE_UPLOAD_TOTAL_LIMIT
- Backward compatible gridfs

README.md

@@ -169,7 +169,9 @@ Environment Variables
       * `local` : Server's Local file system (Setting-less)
       * `none` : Disable file uploading
     * MAX_FILE_SIZE: The maximum file size limit for uploads (bytes). default: `Infinity`
-    * MONGO_GRIDFS_TOTAL_LIMIT: Total capacity limit of MongoDB GridFS (bytes). default: `Infinity`
+    * FILE_UPLOAD_TOTAL_LIMIT: Total capacity limit for uploads (bytes). default: `Infinity`
+    * MONGO_GRIDFS_TOTAL_LIMIT: Total capacity limit of MongoDB GridFS (bytes). default: `null`
+      * MONGO_GRIDFS_TOTAL_LIMIT setting  takes precedence over FILE_UPLOAD_TOTAL_LIMIT.
     * SAML_USES_ONLY_ENV_VARS_FOR_SOME_OPTIONS: If `true`, the system uses only the value of the environment variable as the value of the SAML option that can be set via the environment variable.
     * PUBLISH_OPEN_API: Publish GROWI OpenAPI resources with [ReDoc](https://github.com/Rebilly/ReDoc). Visit `/api-docs`.
     * FORCE_WIKI_MODE: Forces wiki mode. default: undefined

src/server/service/config-loader.js

@@ -130,6 +130,12 @@ const ENV_VAR_NAME_TO_CONFIG_INFO = {
     type:    TYPES.NUMBER,
     default: Infinity,
   },
+  FILE_UPLOAD_TOTAL_LIMIT: {
+    ns:      'crowi',
+    key:     'app:fileUploadTotalLimit',
+    type:    TYPES.NUMBER,
+    default: null,
+  },
   MONGO_GRIDFS_TOTAL_LIMIT: {
     ns:      'crowi',
     key:     'gridfs:totalLimit',

src/server/service/file-uploader/gridfs.js

@@ -83,7 +83,9 @@ module.exports = function(crowi) {
       return { isUploadable: false, errorMessage: err.errmsg };
     }
 
-    const gridfsTotalLimit = crowi.configManager.getConfig('crowi', 'gridfs:totalLimit');
+    // Use app:fileUploadTotalLimit if gridfs:totalLimit is null (default for gridfs:totalLimitd is null)
+    const gridfsTotalLimit = crowi.configManager.getConfig('crowi', 'gridfs:totalLimit')
+      || crowi.configManager.getConfig('crowi', 'app:fileUploadTotalLimit');
     if (usingFilesSize + uploadFileSize > gridfsTotalLimit) {
       return { isUploadable: false, errorMessage: 'MongoDB for uploading files reaches limit' };
     }