Synnefo » ./kamaki

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from urlparse import urlparse

#from .pool.http import get_http_connection

from synnefo.lib.pool.http import get_http_connection

from kamaki.clients.connection import HTTPConnection, HTTPResponse

from kamaki.clients.connection.errors import HTTPConnectionError

from kamaki.clients.connection.errors import HTTPResponseError

from socket import gaierror

from json import loads

from time import sleep

from httplib import ResponseNotReady

class KamakiHTTPResponse(HTTPResponse):

    def _get_response(self):

        if self.prefetched:

            return

        ready = False

        while not ready:

            try:

                r = self.request.getresponse()

            except ResponseNotReady:

                sleep(0.001)

                continue

            break

        self.prefetched = True

        headers = {}

        for k, v in r.getheaders():

            headers.update({k: v})

        self.headers = headers

        self.content = r.read()

        self.status_code = r.status

        self.status = r.reason

        self.request.close()

    @property

    def text(self):

        self._get_response()

        return self._content

    @text.setter

    def test(self, v):

        pass

    @property

    def json(self):

        self._get_response()

        try:

            return loads(self._content)

        except ValueError as err:

            HTTPResponseError('Response not formated in JSON - %s' % err)

    @json.setter

    def json(self, v):

        pass

    def release(self):

        if not self.prefetched:

            self.request.close()

class KamakiHTTPConnection(HTTPConnection):

    def _retrieve_connection_info(self, extra_params={}):

        """ return (scheme, netloc, url?with&params) """

        if self.url:

            url = self.url if self.url[-1] == '/' else (self.url + '/')

        else:

            url = 'http://127.0.0.1'

        if self.path:

            url += self.path[1:] if self.path[0] == '/' else self.path

        params = dict(self.params)

        for k, v in extra_params.items():

            params[k] = v

        for i, (key, val) in enumerate(params.items()):

            param_str = ('?' if i == 0 else '&') + unicode(key)

            if val is not None:

                param_str += '=' + unicode(val)

            url += param_str

        parsed = urlparse(url)

        self.url = url

        self.path = parsed.path if parsed.path else '/'

        self.path += '?%s' % parsed.query if parsed.query else ''

        return (parsed.scheme, parsed.netloc)

    def perform_request(self,

        method=None,

        data=None,

        async_headers={},

        async_params={}):

        (scheme, netloc) = self._retrieve_connection_info(

            extra_params=async_params)

        headers = dict(self.headers)

        for k, v in async_headers.items():

            headers[k] = v

        #de-unicode headers to prepare them for http

        http_headers = {}

        for k, v in headers.items():

            http_headers[str(k)] = str(v)

        #get connection from pool

        conn = get_http_connection(netloc=netloc, scheme=scheme)

        try:

            #Be carefull, all non-body variables should not be unicode

            conn.request(method=str(method.upper()),

                url=str(self.path),

                headers=http_headers,

                body=data)

        except Exception as err:

            conn.close()

            if isinstance(err, gaierror):

                raise HTTPConnectionError(

                    'Cannot connect to %s - %s' % (self.url, err))

            raise

        return KamakiHTTPResponse(conn)