       @cdnUrlModifiers = null
       @isImage = null
       @imageInfo = null
+      @mimeType = null
       @s3Bucket = null
       @sourceInfo.source ||= @sourceName
 

      isStored: @isStored
      isImage: not @s3Bucket and @isImage
      originalImageInfo: @imageInfo
      originalUrl: if @fileId then urlBase else null
      cdnUrl: if @fileId
          "#{urlBase}#{@cdnUrlModifiers or ''}"

      @fileSize = data.size
      @isImage = data.is_image
      @imageInfo = data.image_info
      @mimeType = data.mime_type
      @isStored = data.is_stored
      @s3Bucket = data.s3_bucket
      if data.default_effects
