Shell script for retrieving Dell warranty expiration by service tag

get-dell-warranty.sh

#!/bin/sh

# Warranty request script for Dell PCs
# Written by Adam Nielsen <adam.nielsen@uq.edu.au>
# This code is in the public domain, and is supplied with no warranty.
#
# This script uses Dell's web service to retrieve the most distant warranty expiration
# date for a given machine, as identified by its service tag.  It requires curl and awk.
# It doesn't parse the WSDL or anything nice like that, it just sends a precomposed
# request to the server and extracts the relevant info from the response.

if [ -z "$1" ]; then
	echo 'Use: ./get-dell-warranty.sh <servicetag>'
	exit 1
fi

curl http://xserv.dell.com/services/assetservice.asmx \
	-s -S --data-binary @- --header "Expect:" \
	--header "Soapaction: \"http://support.dell.com/WebServices/GetAssetInformation\"" \
	--header "Content-Type: text/xml; charset=utf-8" \
	<< EOF | awk -F"</?EndDate>" '{for(i=1;++i<=NF;) if(length($i)==19) print substr($i, 1, 10)}' | sort -nr | head -n 1
<?xml version="1.0" encoding="utf-8" ?>
<env:Envelope xmlns:xsd="http://www.w3.org/2001/XMLSchema"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:env="http://schemas.xmlsoap.org/soap/envelope/">
  <env:Body>
    <n1:GetAssetInformation xmlns:n1="http://support.dell.com/WebServices/">
      <n1:guid>11111111-1111-1111-1111-111111111111</n1:guid>
      <n1:applicationName>get-dell-warranty.sh</n1:applicationName>
      <n1:serviceTags>$1</n1:serviceTags>
    </n1:GetAssetInformation>
  </env:Body>
</env:Envelope>
EOF