# -*- coding: utf-8 -*- # Copyright © 2012 Humbug, Inc. # # Permission is hereby granted, free of charge, to any person obtaining a copy # of this software and associated documentation files (the "Software"), to deal # in the Software without restriction, including without limitation the rights # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell # copies of the Software, and to permit persons to whom the Software is # furnished to do so, subject to the following conditions: # # The above copyright notice and this permission notice shall be included in # all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN # THE SOFTWARE. import simplejson import requests import time import traceback import urlparse import sys import os import optparse from distutils.version import LooseVersion from ConfigParser import SafeConfigParser __version__ = "0.1.5" # Check that we have a recent enough version # Older versions don't provide the 'json' attribute on responses. assert(LooseVersion(requests.__version__) >= LooseVersion('0.12.1')) # In newer versions, the 'json' attribute is a function, not a property requests_json_is_function = not isinstance(requests.Response.json, property) API_VERSTRING = "/api/v1/" def generate_option_group(parser): group = optparse.OptionGroup(parser, 'API configuration') group.add_option('--site', default=None, help=optparse.SUPPRESS_HELP) group.add_option('--api-key', action='store') group.add_option('--user', dest='email', help='Email address of the calling user.') group.add_option('--config-file', action='store', help='Location of an ini file containing the above information.') group.add_option('-v', '--verbose', action='store_true', help='Provide detailed output.') return group def init_from_options(options): return Client(email=options.email, api_key=options.api_key, config_file=options.config_file, verbose=options.verbose, site=options.site) class Client(object): def __init__(self, email=None, api_key=None, config_file=None, verbose=False, retry_on_errors=True, site=None, client="API: Python"): if None in (api_key, email): if config_file is None: config_file = os.path.join(os.environ["HOME"], ".humbugrc") if not os.path.exists(config_file): raise RuntimeError("api_key or email not specified and %s does not exist" % (config_file,)) config = SafeConfigParser() with file(config_file, 'r') as f: config.readfp(f, config_file) if api_key is None: api_key = config.get("api", "key") if email is None: email = config.get("api", "email") if site is None and config.has_option("api", "site"): site = config.get("api", "site") self.api_key = api_key self.email = email self.verbose = verbose if site is not None: self.base_url = site else: self.base_url = "https://humbughq.com" self.retry_on_errors = retry_on_errors self.client_name = client def do_api_query(self, orig_request, url, method="POST", longpolling = False): request = {} request["client"] = self.client_name for (key, val) in orig_request.iteritems(): if not (isinstance(val, str) or isinstance(val, unicode)): request[key] = simplejson.dumps(val) else: request[key] = val query_state = { 'had_error_retry': False, 'request': request, 'failures': 0, } def error_retry(error_string): if not self.retry_on_errors or query_state["failures"] >= 10: return False if self.verbose: if not query_state["had_error_retry"]: sys.stdout.write("humbug API(%s): connection error%s -- retrying." % \ (url.split(API_VERSTRING, 2)[1], error_string,)) query_state["had_error_retry"] = True else: sys.stdout.write(".") sys.stdout.flush() query_state["request"]["dont_block"] = simplejson.dumps(True) time.sleep(1) query_state["failures"] += 1 return True def end_error_retry(succeeded): if query_state["had_error_retry"] and self.verbose: if succeeded: print "Success!" else: print "Failed!" while True: try: if method == "GET": kwarg = "params" else: kwarg = "data" kwargs = {kwarg: query_state["request"]} res = requests.request( method, urlparse.urljoin(self.base_url, url), auth=requests.auth.HTTPBasicAuth(self.email, self.api_key), verify=True, timeout=90, **kwargs) # On 50x errors, try again after a short sleep if str(res.status_code).startswith('5'): if error_retry(" (server %s)" % (res.status_code,)): continue # Otherwise fall through and process the python-requests error normally except (requests.exceptions.Timeout, requests.exceptions.SSLError) as e: # Timeouts are either a Timeout or an SSLError; we # want the later exception handlers to deal with any # non-timeout other SSLErrors if (isinstance(e, requests.exceptions.SSLError) and str(e) != "The read operation timed out"): raise if longpolling: # When longpolling, we expect the timeout to fire, # and the correct response is to just retry continue else: end_error_retry(False) return {'msg': "Connection error:\n%s" % traceback.format_exc(), "result": "connection-error"} except requests.exceptions.ConnectionError: if error_retry(""): continue end_error_retry(False) return {'msg': "Connection error:\n%s" % traceback.format_exc(), "result": "connection-error"} except Exception: # We'll split this out into more cases as we encounter new bugs. return {'msg': "Unexpected error:\n%s" % traceback.format_exc(), "result": "unexpected-error"} if requests_json_is_function: json_result = res.json() else: json_result = res.json if json_result is not None: end_error_retry(True) return json_result end_error_retry(False) return {'msg': res.text, "result": "http-error", "status_code": res.status_code} @classmethod def _register(cls, name, url=None, make_request=(lambda request={}: request), method="POST", **query_kwargs): if url is None: url = name def call(self, *args, **kwargs): request = make_request(*args, **kwargs) return self.do_api_query(request, API_VERSTRING + url, method=method, **query_kwargs) call.func_name = name setattr(cls, name, call) def call_on_each_event(self, callback, event_types=None): def do_register(): while True: if event_types is None: res = self.register() else: res = self.register(event_types=event_types) if 'error' in res.get('result'): if self.verbose: print "Server returned error:\n%s" % res['msg'] time.sleep(1) else: return (res['queue_id'], res['last_event_id']) queue_id = None while True: if queue_id is None: (queue_id, last_event_id) = do_register() res = self.get_events(queue_id=queue_id, last_event_id=last_event_id) if 'error' in res.get('result'): if res["result"] == "http-error": if self.verbose: print "HTTP error fetching events -- probably a server restart" elif res["result"] == "connection-error": if self.verbose: print "Connection error fetching events -- probably server is temporarily down?" else: if self.verbose: print "Server returned error:\n%s" % res["msg"] if res["msg"].startswith("Bad event queue id:"): # Our event queue went away, probably because # we were asleep or the server restarted # abnormally. We may have missed some # events while the network was down or # something, but there's not really anything # we can do about it other than resuming # getting new ones. # # Reset queue_id to register a new event queue. queue_id = None # TODO: Make this back off once it's more reliable time.sleep(1) continue for event in res['events']: last_event_id = max(last_event_id, int(event['id'])) callback(event) def call_on_each_message(self, callback): def event_callback(event): if event['type'] == 'message': callback(event['message']) self.call_on_each_event(event_callback, ['message']) def _mk_subs(streams): return {'subscriptions': streams} def _mk_del_subs(streams): return {'delete': streams} def _mk_events(event_types=None): if event_types is None: return dict() return dict(event_types=event_types) Client._register('send_message', url='messages', make_request=(lambda request: request)) Client._register('get_messages', method='GET', url='messages/latest', longpolling=True) Client._register('get_events', url='events', method='GET', longpolling=True, make_request=(lambda **kwargs: kwargs)) Client._register('register', make_request=_mk_events) Client._register('get_profile', method='GET', url='users/me') Client._register('get_public_streams', method='GET', url='streams') Client._register('get_members', method='GET', url='users') Client._register('list_subscriptions', method='GET', url='users/me/subscriptions') Client._register('add_subscriptions', url='users/me/subscriptions', make_request=_mk_subs) Client._register('delete_subscriptions', method='PATCH', url='users/me/subscriptions', make_request=_mk_del_subs)