98 lines
2.6 KiB
Python
98 lines
2.6 KiB
Python
# Tweepy
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# Copyright 2009-2010 Joshua Roesslein
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# See LICENSE for details.
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from tweepy.models import ModelFactory
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from tweepy.utils import import_simplejson
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from tweepy.error import TweepError
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class Parser(object):
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def parse(self, method, payload):
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"""
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Parse the response payload and return the result.
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Returns a tuple that contains the result data and the cursors
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(or None if not present).
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"""
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raise NotImplementedError
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def parse_error(self, payload):
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"""
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Parse the error message from payload.
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If unable to parse the message, throw an exception
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and default error message will be used.
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"""
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raise NotImplementedError
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class RawParser(Parser):
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def __init__(self):
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pass
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def parse(self, method, payload):
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return payload
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def parse_error(self, payload):
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return payload
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class JSONParser(Parser):
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payload_format = 'json'
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def __init__(self):
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self.json_lib = import_simplejson()
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def parse(self, method, payload):
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try:
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json = self.json_lib.loads(payload)
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except Exception, e:
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raise TweepError('Failed to parse JSON payload: %s' % e)
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needsCursors = method.parameters.has_key('cursor')
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if needsCursors and isinstance(json, dict) and 'previous_cursor' in json and 'next_cursor' in json:
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cursors = json['previous_cursor'], json['next_cursor']
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return json, cursors
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else:
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return json
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def parse_error(self, payload):
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error = self.json_lib.loads(payload)
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if error.has_key('error'):
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return error['error']
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else:
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return error['errors']
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class ModelParser(JSONParser):
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def __init__(self, model_factory=None):
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JSONParser.__init__(self)
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self.model_factory = model_factory or ModelFactory
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def parse(self, method, payload):
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try:
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if method.payload_type is None: return
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model = getattr(self.model_factory, method.payload_type)
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except AttributeError:
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raise TweepError('No model for this payload type: %s' % method.payload_type)
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json = JSONParser.parse(self, method, payload)
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if isinstance(json, tuple):
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json, cursors = json
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else:
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cursors = None
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if method.payload_list:
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result = model.parse_list(method.api, json)
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else:
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result = model.parse(method.api, json)
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if cursors:
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return result, cursors
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else:
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return result
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