Form fields are not shown in the converted xod which has special characters

We are using PDFNet::Convert module to convert the pdf with form to xod and later using the xod in the pdf viewer to render the form in the mobile viewer. When we try to respond to the form, certain field are not rendered at all.

The flow is as given.

  1. The pdf with form is uploaded to the server
  2. Server converts the pdf to xod and saves it in the file store
  3. The saved xod is fetched by the mobile and rendered in the webviewer
  4. User responds to the fields and send back the xfdf data to the server


var contentWindow = frame.contentWindow,
annotationManager = contentWindow.readerControl.docViewer.getAnnotationManager(),
formData = annotationManager.exportAnnotations();


  1. Server accepts the xfdf and escapes the form special characters so that postgresql can save it as xml

#custom attribute setter def update_form_data(form_data, user_id) normalized_form_data = REXML::Text.normalize(form_data) update(form_data: normalized_form_data, updated_by_id: user_id) end

  1. User views the form fetched


model getter

def form_data
normalized_form_data = read_attribute(:form_data)
REXML::Text.unnormalize(normalized_form_data) unless normalized_form_data.nil?


$(document).on('documentLoaded', function() { var docViewer = readerControl.docViewer; docViewer.setInternalAnnotationsTransform(function(originalData, callback) { var customData = (window.ControlUtils.getCustomData()) || originalData; //customData is xfdf saved in the server, use it if available else use the pristine form data callback(customData); }); });

  1. The updated field values are absent along with some other fields/widgets.

A thorough inspection of the html obtained in 3rd step shows all the field/widgets missing from the rendered pdf. Only the background image is visible.

Thank you for the detailed report.

Do you know what transformations the REXML normalizer is doing? XFDF has to be in UTF8 encoding (the standard only supports UTF8), so before importing back into WebViewer, it needs to be returned to UTF8 encoding.

If that doesn’t help then we would need the XFDF data as it is just before importing into the annotationManager.

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