~didrocks/unity/altf10

import httplib

import simplejson

from urlparse import urlunparse

from urllib import (

    quote,

    urlencode,

)

class UnsupportedOrder(Exception):

    """Raised when an Unsupported order is requested."""

class GrackleClient:

    """Class for accessing Grackle web service."""

    def __init__(self, host, port):

        """Constructor.

        :param host: The name of the server.

        :param port: The port providing Grackle service.

        """

        self.host = host

        self.port = port

        self.netloc = '%s:%d' % (host, port)

    def archive_url(self, archive_id, query):

        """Return the URL for an archive

        :param archive_id: The id of the archive to generate the URL for.

        :param query: The query to use in the URL, as a dict.

        """

        path = '/archive/%s' % quote(archive_id)

        query_string = urlencode(query)

        return urlunparse(('http', self.netloc, path, '', query_string, ''))

    def _get_connection(self):

        return httplib.HTTPConnection(self.host, self.port)

    def _method_archive(self, method, archive_id, query, body=None):

        """Perform an HTTP method on an archive's URL."""

        url = self.archive_url(archive_id, query)

        connection = self._get_connection()

        connection.request(method, url, body)

        return connection.getresponse()

    def put_message(self, archive_id, key, file_obj):

        """Put a message into an archive.

        :param archive_id: The archive to put the message into.

        :param key: An arbitrary identifier that can later be used to retrieve

            the message.

        :param file_obj: The raw text of the message, as a file.

        """

        response = self._method_archive(

            'POST', archive_id, {'key': key}, file_obj.read())

        response.read()

        if response.status == httplib.BAD_REQUEST:

            raise Exception('wtf')

        elif response.status == httplib.CREATED:

            return

        else:

            raise Exception('!!')

    def get_messages(self, archive_id, message_ids=None, limit=None,

                     memo=None, order=None, headers=None,

                     max_body_length=None, include_hidden=False):

        """Retrieve specified messages.

        :param archive_id: The archive to retrieve messages from.

        :param message_ids: (optional) Retrieve only messages with these ids.

        :param limit: The maximum number of messages to return.  The server

            may, at its discretion, return fewer.

        :param memo: (optional) Opaque identifier describing the position in

            the list of messages to return.  The combination of a memo and a

            limit describes a batch of results.  If not specified, the start

            is used.

        :param order: The order to return results in.  Supported orders are

            determined by the server.  See test_client.SUPPORTED_ORDERS for an

            example.

        :param headers: The headers to include in the message.  Only headers

            actually present in the message will be provided.  If unspecified,

            most headers will be included.

        :param max_body_length: The maximum length for a message's body.  When

            multiple messages are nested (as with a thread), this applies to

            each message's body, not the aggregate length of all messages'

            bodies.

        :param include_hidden: If true, include messages that have been

            flagged "hidden" in the results.

        """

        parameters = {}

        if message_ids is not None:

            parameters['message_ids'] = message_ids

        if limit is not None:

            parameters['limit'] = limit

        if memo is not None:

            parameters['memo'] = memo

        if order is not None:

            parameters['order'] = order

        if headers is not None:

            parameters['headers'] = headers

        if max_body_length is not None:

            parameters['max_body_length'] = max_body_length

        parameters['include_hidden'] = include_hidden

        query = {'parameters': simplejson.dumps(parameters)}

        response = self._method_archive('GET', archive_id, query)

        if response.status == httplib.BAD_REQUEST:

            raise UnsupportedOrder

        data = response.read()

        return simplejson.loads(data)