(Ruby) PDF List Unsigned Signature Fields

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Demonstrates how to list the unsigned signature fields in a PDF.

Note: This example requires Chilkat v9.5.0.90 or greater.

Chilkat Ruby Downloads install from rubygems.org gem install chilkat or download... Ruby Library for Windows, MacOS, Linux, Alpine Linux

require 'chilkat'

# This example requires the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

pdf = Chilkat::CkPdf.new()

# Load a PDF containing 2 remaining unsigned signature fields:
success = pdf.LoadFile("qa_data/pdf/doctor_patient_parent.pdf")
if (success == false)
    print pdf.lastErrorText() + "\n";
    exit
end

# Note: This example requires Chilkat v9.5.0.90 or greater.
json = Chilkat::CkJsonObject.new()
pdf.GetUnsignedSigFields(json)

json.put_EmitCompact(false)
print json.emit() + "\n";

# Result:
# {
#   "unsignedSigField": [
#     "doctor_signature",
#     "parent_signature"
#   ]
# }

# To iterate over the field names:

i = 0
count_i = json.SizeOfArray("unsignedSigField")
while i < count_i
    json.put_I(i)
    strVal = json.stringOf("unsignedSigField[i]")
    print strVal + "\n";
    i = i + 1
end