def primitive_read(query, credentials=credentials, escape=escape, cursor=False):
# Put the query in an envelope
envelope = {'query':query, "cursor":cursor}
# Add escape if needed
# if escape != 'html':
# envelope['escape'] = False # if not escape else escape
# Encode the result
encoded = urllib.urlencode({'query': json.encode(envelope)})
# Build the URL and create a Request object for it
url = 'http://%s%s?%s' % (host, readservice, encoded)
headers = {}
if credentials is not None: headers["Cookie"] = credentials
resp = fetch(url, method=GET, headers=headers)
inner = json.decode(resp.content) # Parse JSON response to an object
# If anything was wrong with the invocation, mqlread will return an HTTP
# error, and the code above with raise urllib2.HTTPError.
# If anything was wrong with the query, we won't get an HTTP error, but
# will get an error status code in the response envelope. In this case
# we raise our own MQLError exception.
if not inner['code'].startswith('/api/status/ok'):
if debug:
print "\n".join(map(str, q, inner, resp.headers['X-Metaweb-Cost'], resp.headers['X-Metaweb-TID']))
error = inner['messages'][0]
raise MQLError('%s: %s' % (error['code'], error['message']), error['message'])
# If there was no error, then just return the result from the envelope
return inner
def pretty_query(self):
return json.encode(json.decode(self.query))
