Python Script Snippet

	#!usr/bin/env/python
	"""
	Sample Python script using Lyons ABA web service methods
	tested on Python 2.4.

	ABA Web Service Documentation
	https://www.lyonsreg.com/products/getprimarybankfullxml.asp



	import httplib
	import urllib
	import xml.dom.minidom

	#-------SETTINGS-------
	HOST = 'www.lyonsreg.com'
	URL = '/webservices/aba/ABAService.asmx'
	httplib.HTTPConnection.debuglevel = 0
	#----------------------

	def _str_to_bool(val):
	    """Convenience function"""
	    val=str(val).lower()
	    assert val in ['false','true']
	    return bool(['false','true'].index(val))

	def _SOAP_post(SOAPAction,xml):
	    """Handles making the SOAP request"""
	    h = httplib.HTTPConnection(HOST)
	    headers={
	        'Host':HOST,
	        'Content-Type':'text/xml; charset=utf-8',
	        'Content-Length':len(xml),
	        'SOAPAction':'"%s"' % SOAPAction,
	    }
	    h.request ('POST', URL, body=xml,headers=headers)
	    r = h.getresponse()
	    d = r.read()
	    if r.status!=200:
	        raise ValueError('Error connecting: %s, %s' % (r.status, r.reason))
	    return d

	def _logon(companyID,username,password):
	    """First call logon to get your token"""
	    in_xml="""\
	<?xml version="1.0" encoding="utf-8"?>
	<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
	    <soap:Body>
	        <Logon xmlns="http://www.lyonsreg.com/WebService/ABAService">
	            <companyID>%s</companyID>
	            <userName>%s</userName>
	            <password>%s</password>
	        </Logon>
	    </soap:Body>
	</soap:Envelope>""" % (companyID,username,password)
	    result_xml=_SOAP_post("http://www.lyonsreg.com/WebService/ABAService/Logon",in_xml)
	    doc=xml.dom.minidom.parseString(result_xml)
	    response=doc.getElementsByTagName('LogonResult')[0].firstChild.data
	    return response

	def logoff(token):
	    """I guess call this when you're done"""
	    in_xml="""\
	<?xml version="1.0" encoding="utf-8"?>
	<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
	  <soap:Body>
	    <Logoff xmlns="http://www.lyonsreg.com/WebService/ABAService">
	      <token>%s</token>
	    </Logoff>
	  </soap:Body>
	</soap:Envelope>""" % token
	    result_xml=_SOAP_post("http://www.lyonsreg.com/WebService/ABAService/Logoff",in_xml)
	    return True

	def _required_logon(token):
	    """Use this to know if you need to login again"""
	    in_xml="""\
	<?xml version="1.0" encoding="utf-8"?>
	<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
	  <soap:Body>
	    <RequiredLogon xmlns="http://www.lyonsreg.com/WebService/ABAService">
	      <token>%s</token>
	    </RequiredLogon>
	  </soap:Body>
	</soap:Envelope>""" % token
	    result_xml=_SOAP_post("http://www.lyonsreg.com/WebService/ABAService/RequiredLogon",in_xml)
	    doc=xml.dom.minidom.parseString(result_xml)
	    response=doc.getElementsByTagName('RequiredLogonResult')[0].firstChild.data
	    return _str_to_bool(response)

	def bool_verify_ABA(aba,companyID,username,password):
	    """Lookup ABA number on Lyons Server and return if found.
	    Note: This function handles logging in for you, if it finds you need to."""
	    global TOKEN
	    if (not TOKEN) or (_required_logon(TOKEN)):
	        TOKEN=_logon(companyID,username,password)
	    in_xml="""\
	<?xml version="1.0" encoding="utf-8"?>
	<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
	  <soap:Body>
	    <VerifyABA xmlns="http://www.lyonsreg.com/WebService/ABAService">
	      <token>%s</token>
	      <aba>%s</aba>
	    </VerifyABA>
	  </soap:Body>
	</soap:Envelope>""" % (TOKEN,aba)
	    result_xml=_SOAP_post("http://www.lyonsreg.com/WebService/ABAService/VerifyABA",in_xml)
	    doc=xml.dom.minidom.parseString(result_xml)
	    response=doc.getElementsByTagName('VerifyABAResult')[0].firstChild.data
	    return _str_to_bool(response)

	if __name__=='__main__':
	    #Quick Tests
	    token=_logon('yourcompanyid','username','pw')
	    print token
	    assert _required_logon(token)==False
	    logoff(token)
	    assert _required_logon(token)==True
	    token=_logon('yourcompanyid','username','pw')
	    print token
	    #actual usage:
	    assert bool_verify_ABA(token,'abanumber','yourcompanyid','username','pw')==False

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