Sample encoding and decoding hl7 messages from EDM ADR

decode.rb

#!/usr/bin/env ruby -w
# encoding: UTF-8
require 'base64'

input = ''

unless ARGV[0] == 'hl7'
  input = File.read 'doc_base64.txt'
else
  input = File.read( 'hl7_samples/working_hl7_sample.txt' ).split( '^Base64^' )[1]
end

decoded = Base64.decode64 input

pdf_base64 = ''
lines_read = 0
decoded.each_line do |line|
  lines_read += 1
  pdf_base64 << line if lines_read > 8
end

pdf = File.new 'doc.pdf', 'wb'
pdf << Base64.decode64( pdf_base64 )
pdf.close

encode.rb

#!/usr/bin/env ruby -w
# encoding: UTF-8
require 'base64'

mime_header =<<EOF
Mime Header (Add this to Base64 encoded PDF):
------=_Part_0_12717604.1285180108138
Content-Type: multipart/mixed

------=_Part_1_22540508.1285180108139
Content-Type: application/pdf
Content-Transfer-Encoding: BASE64
Content-Disposition: attachment; filename=AD.pdf

EOF

# read in the EDM ADR HL7 message and get the PDF Base64 String
edm_input  = File.new 'hl7_samples/02-edm_adr_hl7.txt', 'r'
document = edm_input.read.split( '^Base 64^' )[1]
edm_input.close

# Add the mime type and re-encode in Base64
document = Base64.encode64( mime_header + document )
doc_encode = File.new 'doc_base64.txt', 'w'
doc_encode << document
doc_encode.close