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zulip/api/humbug/__init__.py

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# -*- 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__ = "0.1.9"
# 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 = callable(requests.Response.json)
API_VERSTRING = "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 bot or user.')
group.add_option('--config-file',
action='store',
help='Location of an ini file containing the\nabove information. (default ~/.humbugrc)')
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:
if not site.startswith("http"):
site = "https://" + site
self.base_url = site
else:
self.base_url = "https://api.humbughq.com"
if self.base_url != "https://api.humbughq.com" and not self.base_url.endswith("/api"):
self.base_url += "/api"
if not self.base_url.endswith("/"):
self.base_url += "/"
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)[0], 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_rm_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('update_message', method='PATCH', 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('remove_subscriptions', method='PATCH', url='users/me/subscriptions', make_request=_mk_rm_subs)
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