Limit File Size with Bean Shell

Introduction

This guide shows how to use a Bean Shell validator to ensure that the total size of multiple uploaded files does not exceed a specified limit. This approach checks both individual file sizes and the cumulative size of all files.

Example scenarios

Exceeding Limit:
If a file exceeds the 5 MB limit, the validator will trigger an error.
Total Size Exceeding Limit:
If the total size of multiple files exceeds 5 MB, even if each file is below the limit, the validator will activate.

Implementation

To configure the Bean Shell validator for the file upload element:

Access the File Upload Element in your form and select the Bean Shell Validator.

Insert the following Validation Code into the script section of the Bean Shell validator.

import org.joget.apps.form.service.FormUtil;
import org.joget.commons.util.FileManager;
 
boolean result = true;
String[] values = FormUtil.getElementPropertyValues(element, formData);
long totalSize = 0;
long maxSize = 5000000;
String errorMessage = "";
 
for (String value : values) {
    File file = FileManager.getFileByPath(value);
    if (file != null) {
        totalSize += file.length();
        errorMessage += file.getName() + "(" + file.length()/1048576 + ") " + " | ";
    }
}
if (totalSize > maxSize) {
    String id = FormUtil.getElementParameterName(element);
    formData.addFormError(id, "Max size(MB) (" + maxSize/1000000 + ") | " + errorMessage);
    result = false;
}
 
return result;

Introduction

Example scenarios

Implementation

Related documentation