Question

I am trying to use python for address verification using CDYNE service.

I used this as reference to create POST request and it looks like following

import urllib2
import urllib

url = 'http://pav3.cdyne.com/PavService.svc/VerifyAddressAdvanced'
data = {}

data['CityName'] = 'San Francisco'
data['FirmOrRecipient'] = 'CDYNE'
data['LicenseKey'] = 'valid_key'
data['PrimaryAddressLine'] = '45 fremont street'
data['ReturnCaseSensitive'] = True
data['ReturnCensusInfo'] = True
data['ReturnCityAbbreviation'] = True
data['ReturnGeoLocation'] = True
data['ReturnLegislativeInfo'] = True
data['ReturnMailingIndustryInfo'] = True
data['ReturnResidentialIndicator'] = True
data['ReturnStreetAbbreviated'] = True
data['SecondaryAddressLine'] = ''
data['State'] = 'CA'
data['Urbanization'] = ''
data['ZipCode'] = '94105'  

and post the request as following

data_encoded = urllib.urlencode(data)
req = urllib2.Request(url, data_encoded)
response = urllib2.urlopen(req)  

I see error as

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 126, in urlopen
    return _opener.open(url, data, timeout)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 398, in open
    response = meth(req, response)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 511, in http_response
    'http', request, response, code, msg, hdrs)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 436, in error
    return self._call_chain(*args)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 370, in _call_chain
    result = func(*args)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 519, in http_error_default
    raise HTTPError(req.get_full_url(), code, msg, hdrs, fp)
urllib2.HTTPError: HTTP Error 400: Bad Request  

I am new to this so don’t understand what has gone wrong, please help

Answer 1

you either have to send the request as json or xml formatted document, the schema is on the page you’ve linked to.
you’re sending an urlencoded request, which isn’t supported by the api.

edit: that’s how it would look like using JSON:

import json
data_encoded = json.dumps(data)
req = urllib2.Request(url, data_encoded, {'Content-Type': 'application/json'})
response = urllib2.urlopen(req)
print response.read()
# ...