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BluePay-Sample-Code/Ruby/samples/Get_Data/Validate_BP_Stamp.rb

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#!/usr/bin/ruby
##
# BluePay Ruby Sample code.
#
# This code sample reads the values from a BP10emu redirect
# and authenticates the message using the the BP_STAMP
# provided in the response. Point the REDIRECT_URL of your
# BP10emu request to the location of this script on your server.
##
print "Content-type:text/html\r\n\r\n"
print "<html><head></head><body>"
require_relative "bluepay.rb"
require "cgi"
ACCOUNT_ID = "Merchant's Account ID Here"
SECRET_KEY = "Merchant's Secret Key Here"
MODE = "TEST"
response = CGI.new
if response["BP_STAMP"] # Check whether BP_STAMP is provided
bp = BluePay.new(account_id: ACCOUNT_ID, secret_key: SECRET_KEY, mode: MODE)
bp_stamp_string = ''
response["BP_STAMP_DEF"].split(' ').each do |field| # Split BP_STAMP_DEF on whitespace
bp_stamp_string += response[field] # Concatenate values used to calculate expected BP_STAMP
end
expected_stamp = bp.create_tps_hash(bp_stamp_string, response["TPS_HASH_TYPE"]).upcase # Calculate expected BP_STAMP using hash function specified in response
if expected_stamp == response["BP_STAMP"] # Compare expected BP_STAMP with received BP_STAMP
# Validate BP_STAMP and reads the response results
print "VALID BP_STAMP: TRUE<br/>"
response.params.each{|k,v| print "#{k}: #{v[0]}<br/>"}
else
print "ERROR: BP_STAMP VALUES DO NOT MATCH<br/>"
end
else
print "ERROR: BP_STAMP NOT FOUND. CHECK MESSAGE & RESPONSEVERSION<br/>"
end
print "</body></html>"