PDF forms

#26563

Below is a simple PDF-forms based server-side “calculator”. It submits PDF form input to server-side script and recieves the form update as FDF data.

Note: Preview.app of Mac OS X (default PDF reader of Safari browser) does not seem to support PDF form submitting.

index.jsp
[language=xml:1rjc3xsm]<%@ taglib uri="http://pd4ml.com/tlds/pd4ml/2.6" prefix="pd4ml" %><%@page contentType="text/html; charset=ISO8859_1"%>

Field 1:
Field 2:
Popup message:
Result:

[/language:1rjc3xsm]

fdf.jsp
[language=xml:1rjc3xsm]<%@page contentType="application/vnd.fdf"%><% int v1 = 0; int v2 = 0; try { v1 = Integer.parseInt(request.getParameter("field1")); } catch ( NumberFormatException e ) { } try { v2 = Integer.parseInt(request.getParameter("field2")); } catch ( NumberFormatException e ) { } int res = v1 + v2; // business logic of the script String status = request.getParameter("status"); String message = ( status != null && status.length() > 0 ) ? “/Status (Well done!)” : “”;
%>
%FDF-1.2
1 0 obj
< /Fields [ << /T(result) /V(<%=res%>) >>
<< /T(field1) /V(<%=v1%>) >>
<< /T(field2) /V(<%=v2%>) >>
% << /T(status) /V(<%=(message.length() > 0?”Yes”:”Off”)%>) >> % Checkbox init does not work for some reason
]
/UF(<%=request.getHeader("referer") %>)
/F(<%=request.getHeader("referer") %>)
>>
>>
endobj
trailer
<>
%%EOF[/language:1rjc3xsm]

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