import urllib2

import urllib

import json

import hmac

import base64

import hashlib

import re

class BaseClient(object):

def __init__(self, api, apikey, secret):

self.api = api

self.apikey = apikey

self.secret = secret

def request(self, command, args):

args['apikey'] = self.apikey

args['command'] = command

args['response'] = 'json'

params=[]

keys = sorted(args.keys())

for k in keys:

params.append(k + '=' + urllib.quote_plus(args[k]).replace("+", "%20"))

query = '&'.join(params)

signature = base64.b64encode(hmac.new(

self.secret,

msg=query.lower(),

digestmod=hashlib.sha1

).digest())

query += '&signature=' + urllib.quote_plus(signature)

response = urllib2.urlopen(self.api + '?' + query)

decoded = json.loads(response.read())

propertyResponse = command.lower() + 'response'

if not propertyResponse in decoded:

if 'errorresponse' in decoded:

raise RuntimeError("ERROR: " + decoded['errorresponse']['errortext'])

else:

raise RuntimeError("ERROR: Unable to parse the response")

response = decoded[propertyResponse]

result = re.compile(r"^list(\w+)s").match(command.lower())

if not result is None:

type = result.group(1)

if type in response:

return response[type]

else:

# sometimes, the 's' is kept, as in :

# { "listasyncjobsresponse" : { "asyncjobs" : [ ... ] } }

type += 's'

if type in response:

return response[type]

return response