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"""
Utility code in speaking the neo4j REST api
"""
import json
import urllib2
def post_neo4j(url, data):
"""
@return dict object from the neo4j json POST response
@raise exception: if the 'errors' key is not empty
"""
ret = post(url, data)
ret_data = json.load(ret)
if ret_data['errors']:
raise Exception('neo4j exception: ' + str(ret_data['errors']))
return ret_data
def post(url, data):
assert(isinstance(data, dict)) # make sure we're not handed json strings
post_data_json = json.dumps(data)
req = urllib2.Request(url)
req.add_header('User-Agent', 'rhizi-server/0.1')
req.add_header('Accept', 'application/json; charset=UTF-8')
req.add_header('Content-Type', 'application/json')
try:
ret = urllib2.urlopen(req, post_data_json)
except urllib2.HTTPError as e:
raise Exception('post request failed: code: {0}, reason: {1}'.format(e.code, e.reason))
return ret
def statement_to_REST_form(query, parameters={}):
"""
turn cypher query to neo4j json API format
"""
assert isinstance(query, basestring)
assert isinstance(parameters, dict)
return {'statement' : query, 'parameters': parameters}
def statement_set_to_REST_form(statement_set):
assert isinstance(statement_set, list)
return {'statements': statement_set}
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