Touch UI Validate Asset file names on Upload

Question

Hi All,

I want to validate asset file names at the time of upload asset in dam.

When uploading new asset in DAM can there be a validation script which will only allow the supported (by AEM and Dynamic Media) characters within the file name. file name only allow these a-z A-Z - _ 0-9.

I have try one solution but that is not working.

http://experience-aem.blogspot.com/2018/11/aem-6420-touch-ui-validate-asset-file-names-on-upload.html

Please could anyone suggest how can i do that.

Thanks.

Tanika02 · Accepted Answer

@user00181 -

Develop a custom workflow process in AEM that intercepts the asset upload operation and performs the file name validation.

Implement a custom Java class that represents the workflow process step responsible for file name validation. This class should extend the AbstractWorkflowProcess or AbstractAssetWorkflowProcess class provided by AEM.

@user00181 - https://sourcedcode.com/blog/aem/aem-granite-ui-1-0-form-components-xml-cheat-sheet-reference-guide#granite-ui-pathfield

Tanika02 · Answer

Hello @user00181 -

You can write/customize the below script further as per your use-case :

package com.yourpackage;

import org.apache.commons.lang3.StringUtils;
import org.apache.sling.api.SlingHttpServletRequest;
import org.apache.sling.api.SlingHttpServletResponse;
import org.apache.sling.api.servlets.SlingAllMethodsServlet;

import javax.servlet.Servlet;
import javax.servlet.ServletException;
import java.io.IOException;
import java.util.regex.Pattern;

public class CustomAssetUploadServlet extends SlingAllMethodsServlet implements Servlet {

    private static final Pattern FILENAME_PATTERN = Pattern.compile("^[a-zA-Z0-9-_]+$");

    @Override
    protected void doPost(SlingHttpServletRequest request, SlingHttpServletResponse response) throws ServletException, IOException {
        // Get the uploaded file name
        String fileName = request.getRequestPathInfo().getSuffix();

        // Validate the file name against supported characters
        if (!isValidFileName(fileName)) {
            response.sendError(SlingHttpServletResponse.SC_BAD_REQUEST, "Invalid file name. File names can only contain a-z, A-Z, 0-9, hyphen (-), and underscore (_).");
            return;
        }

        // Continue with the default asset upload logic
        super.doPost(request, response);
    }

    private boolean isValidFileName(String fileName) {
        return StringUtils.isNotBlank(fileName) && FILENAME_PATTERN.matcher(fileName).matches();
    }
}

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