balkian/bitter
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Code Issues Releases Wiki Activity

Added limits to every call

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This commit is contained in:
J. Fernando Sánchez 2016-09-28 05:06:12 +02:00
parent 09feb050a6
commit 2036d51d96
4 changed files with 114 additions and 41 deletions
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2
bitter/VERSION
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@ -1 +1 @@
0.5.4
0.5.5

26
bitter/cli.py
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@ -10,6 +10,7 @@ import sqlite3
from sqlalchemy import exists
from bitter import utils, models, crawlers
from bitter import config as bconf
from bitter.models import make_session, User, ExtractorEntry, Following
import sys
@ -33,7 +34,7 @@ def main(ctx, verbose, logging_level, config, credentials):
ctx.obj = {}
ctx.obj['VERBOSE'] = verbose
ctx.obj['CONFIG'] = config
ctx.obj['CREDENTIALS'] = credentials
bconf.CREDENTIALS = credentials
utils.create_credentials(credentials)
@main.group()
@ -45,7 +46,7 @@ def tweet(ctx):
@click.argument('tweetid')
@click.pass_context
def get_tweet(ctx, tweetid):
wq = crawlers.TwitterQueue.from_credentials(ctx.obj['CREDENTIALS'])
wq = crawlers.TwitterQueue.from_credentials(bconf.CREDENTIALS)
t = utils.get_tweet(wq, tweetid)
print(json.dumps(t, indent=2))
@ -54,7 +55,7 @@ def get_tweet(ctx, tweetid):
@click.argument('query')
@click.pass_context
def get_tweet(ctx, query):
wq = crawlers.TwitterQueue.from_credentials(ctx.obj['CREDENTIALS'])
wq = crawlers.TwitterQueue.from_credentials(bconf.CREDENTIALS)
c = wq.next()
t = utils.search_tweet(c.client, query)
print(json.dumps(t, indent=2))
@ -63,7 +64,7 @@ def get_tweet(ctx, query):
@click.argument('user')
@click.pass_context
def get_tweet(ctx, user):
wq = crawlers.TwitterQueue.from_credentials(ctx.obj['CREDENTIALS'])
wq = crawlers.TwitterQueue.from_credentials(bconf.CREDENTIALS)
c = wq.next()
t = utils.user_timeline(c.client, user)
print(json.dumps(t, indent=2))
@ -88,7 +89,7 @@ def list_users(ctx, db):
@click.argument('user')
@click.pass_context
def get_user(ctx, user):
wq = crawlers.TwitterQueue.from_credentials(ctx.obj['CREDENTIALS'])
wq = crawlers.TwitterQueue.from_credentials(bconf.CREDENTIALS)
c = wq.next()
u = utils.get_user(c.client, user)
print(json.dumps(u, indent=2))
@ -112,7 +113,7 @@ def get_users(ctx, usersfile, skip, until, threads, db):
return ExitStack()
wq = crawlers.TwitterQueue.from_credentials(ctx.obj['CREDENTIALS'])
wq = crawlers.TwitterQueue.from_credentials(bconf.CREDENTIALS)
logger.info('Starting Network crawler with {} threads and {} credentials.'.format(threads,
len(wq.queue)))
@ -281,7 +282,7 @@ def users_extractor(ctx):
@click.pass_context
def extract(ctx, recursive, user, name, initfile):
print(locals())
wq = crawlers.TwitterQueue.from_credentials(ctx.obj['CREDENTIALS'])
wq = crawlers.TwitterQueue.from_credentials(bconf.CREDENTIALS)
dburi = ctx.obj['DBURI']
utils.extract(wq,
recursive=recursive,
@ -293,7 +294,7 @@ def extract(ctx, recursive, user, name, initfile):
@extractor.command('reset')
@click.pass_context
def reset_extractor(ctx):
wq = crawlers.TwitterQueue.from_credentials(ctx.obj['CREDENTIALS'])
wq = crawlers.TwitterQueue.from_credentials(bconf.CREDENTIALS)
db = ctx.obj['DBURI']
session = make_session(db)
session.query(ExtractorEntry).filter(ExtractorEntry.pending==True).update({'pending':False})
@ -302,7 +303,7 @@ def reset_extractor(ctx):
@click.argument('url', required=False)
@click.pass_context
def get_limits(ctx, url):
wq = crawlers.TwitterQueue.from_credentials(ctx.obj['CREDENTIALS'])
wq = crawlers.TwitterQueue.from_credentials(bconf.CREDENTIALS)
for worker in wq.queue:
resp = worker.client.application.rate_limit_status()
print('#'*20)
@ -324,11 +325,10 @@ def get_limits(ctx, url):
@click.argument('CONSUMER_SECRET', required=True)
@click.pass_context
def run_server(ctx, consumer_key, consumer_secret):
from . import config
config.CONSUMER_KEY = consumer_key
config.CONSUMER_SECRET = consumer_secret
bconf.CONSUMER_KEY = consumer_key
bconf.CONSUMER_SECRET = consumer_secret
from .webserver import app
app.run()
app.run(host='0.0.0.0')
if __name__ == '__main__':

79
bitter/crawlers.py
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@ -1,4 +1,5 @@
import time
import datetime
import urllib
import random
import json
@ -41,23 +42,52 @@ class TwitterWorker(object):
def __init__(self, name, client):
self.name = name
self.client = client
self.throttled_time = False
self._lock = Lock()
self.busy = False
self.limits = self.client.application.rate_limit_status()
@property
def throttled(self):
if not self.throttled_time:
return False
t = time.time()
delta = self.throttled_time - t
if delta > 0:
return True
def is_limited(self, uriparts):
limit = self.get_limit(uriparts)
if limit and limit['remaining'] <=0:
t = datime.datetime.now()
delta = limit['reset'] - t
if delta < datetime.timedelta(seconds=1):
return True
return False
def throttle_until(self, epoch=None):
self.throttled_time = int(epoch)
logger.info("Worker %s throttled for %s seconds" % (self.name, str(epoch-time.time())))
def get_wait(self, uriparts):
limits = self.get_limit(uriparts)
if limits['remaining'] > 0:
return 0
reset = datetime.datetime.fromtimestamp(limits.get('reset', 0))
now = datetime.datetime.now()
return max(0, (reset-now).total_seconds())
def get_limit(self, uriparts):
uri = '/'+'/'.join(uriparts)
return self.limits.get('resources', {}).get(uriparts[0], {}).get(uri, {})
def set_limit(self, uriparts, value):
uri = '/'+'/'.join(uriparts)
if 'resources' not in self.limits:
self.limits['resources'] = {}
resources = self.limits['resources']
if uriparts[0] not in resources:
resources[uriparts[0]] = {}
resource = resources[uriparts[0]]
resource[uri] = value
def update_limits(self, uriparts, remaining, reset, limit):
self.set_limit(uriparts, {'remaining': remaining,
'reset': reset,
'limit': limit})
def update_limits_from_headers(self, uriparts, headers):
reset = float(headers.get('X-Rate-Limit-Reset', time.time() + 30))
remaining = int(headers.get('X-Rate-Limit-Remaining', 0))
limit = int(headers.get('X-Rate-Limit-Limit', -1))
self.update_limits(uriparts=uriparts, remaining=remaining, reset=reset, limit=limit)
class TwitterQueue(AttrToFunc):
@ -77,20 +107,20 @@ class TwitterQueue(AttrToFunc):
while True:
c = None
try:
c = self.next()
c = self.next(uriparts)
c._lock.acquire()
c.busy = True
logger.debug('Next: {}'.format(c.name))
ping = time.time()
resp = getattr(c.client, "/".join(uriparts))(*args, **kwargs)
pong = time.time()
c.update_limits_from_headers(uriparts, resp.headers)
logger.debug('Took: {}'.format(pong-ping))
return resp
except TwitterHTTPError as ex:
if ex.e.code in (429, 502, 503, 504):
limit = ex.e.headers.get('X-Rate-Limit-Reset', time.time() + 30)
logger.info('{} limited'.format(c.name))
c.throttle_until(limit)
c.update_limits_from_headers(uriparts, ex.e.headers)
continue
else:
raise
@ -101,11 +131,6 @@ class TwitterQueue(AttrToFunc):
if c:
c.busy = False
c._lock.release()
@property
def client(self):
return self.next().client
@classmethod
def from_credentials(self, cred_file=None):
@ -119,26 +144,26 @@ class TwitterQueue(AttrToFunc):
wq.ready(TwitterWorker(cred["user"], c))
return wq
def _next(self):
def _next(self, uriparts):
logger.debug('Getting next available')
s = list(self.queue)
random.shuffle(s)
for worker in s:
if not worker.throttled and not worker.busy:
if not worker.is_limited(uriparts) and not worker.busy:
return worker
raise Exception('No worker is available')
def next(self):
def next(self, uriparts):
if not self.wait:
return self._next()
return self._next(uriparts)
while True:
try:
return self._next()
return self._next(uriparts)
except Exception:
available = filter(lambda x: not x.busy, self.queue)
if available:
first_worker = min(available, key=lambda x: x.throttled_time)
diff = first_worker.throttled_time - time.time()
first_worker = min(available, key=lambda x: x.get_wait(uriparts))
diff = first_worker.get_wait(uriparts)
logger.info("All workers are throttled. Waiting %s seconds" % diff)
else:
diff = 5

48
tests/test_crawlers.py Normal file
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@ -0,0 +1,48 @@
from unittest import TestCase
import os
import types
import datetime
import time
from bitter import utils
from bitter.crawlers import TwitterQueue, TwitterWorker
from bitter import config as c
class TestUtils(TestCase):
def setUp(self):
self.wq = TwitterQueue.from_credentials(os.path.join(os.path.dirname(__file__), 'credentials.json'))
def test_create_worker(self):
assert len(self.wq.queue)==1
def test_get_limits(self):
w1 = list(self.wq.queue)[0]
print(w1.limits)
limitslook = w1.get_limit(['statuses', 'lookup'])
assert limitslook['remaining'] == limitslook['limit']
def test_set_limits(self):
w1 = list(self.wq.queue)[0]
w1.set_limit(['test', 'test2'], {'remaining': 0})
assert w1.get_limit(['test', 'test2']) == {'remaining': 0}
def test_await(self):
w1 = list(self.wq.queue)[0]
w1.set_limit(['test', 'wait'], {'remaining': 0, 'reset': time.time()+2})
assert w1.get_wait(['test', 'wait']) > 1
time.sleep(2)
assert w1.get_wait(['test', 'wait']) == 0
assert w1.get_wait(['statuses', 'lookup']) == 0
def test_is_limited(self):
w1 = list(self.wq.queue)[0]
assert not w1.is_limited(['statuses', 'lookup'])
def test_call(self):
w1 = list(self.wq.queue)[0]
l1 = w1.get_limit(['users', 'lookup'])
resp = self.wq.users.lookup(screen_name='balkian')
l2 = w1.get_limit(['users', 'lookup'])
assert l1['remaining']-l2['remaining'] == 1