def test_is_connection_failure(self):
for e in (socket.timeout(), socket.error(), requests.ConnectionError(),
httplib.NotConnected(), urllib2.URLError(socket.gaierror('foo bar')),
urllib3.exceptions.TimeoutError()):
assert util.is_connection_failure(e), e
for e in (None, 3, 'asdf', IOError(), httplib.HTTPException('unknown'),
urllib2.URLError('asdf'),
urllib2.HTTPError('url', 403, 'msg', {}, None),
):
assert not util.is_connection_failure(e), e
def handle_exception(self, e, debug):
"""A webapp2 exception handler that propagates HTTP exceptions into the response.
Use this as a :meth:`webapp2.RequestHandler.handle_exception()` method by
adding this line to your handler class definition::
handle_exception = handlers.handle_exception
I originally tried to put this in a :class:`webapp2.RequestHandler` subclass,
but it gave me this exception::
File ".../webapp2-2.5.1/webapp2_extras/local.py", line 136, in _get_current_object
raise RuntimeError('no object bound to %s' % self.__name__) RuntimeError: no object bound to app
These are probably related:
* http://eemyop.blogspot.com/2013/05/digging-around-in-webapp2-finding-out.html
* http://code.google.com/p/webapp-improved/source/detail?r=d962ac4625ce3c43a3e59fd7fc07daf8d7b7c46a
"""
code, body = util.interpret_http_exception(e)
if code:
self.response.set_status(int(code))
self.response.write('HTTP Error %s: %s' % (code, body))
elif util.is_connection_failure(e):
self.response.set_status(502)
self.response.write('Upstream server request failed: %s' % e)
else:
raise
def post(self):
source = self.load_source(param='key')
kind = source.key.kind()
feature = util.get_required_param(self, 'feature')
state = util.encode_oauth_state({
'operation': 'delete',
'feature': feature,
'source': source.key.urlsafe().decode(),
'callback': self.request.get('callback'),
})
# Blogger don't support redirect_url() yet
if kind == 'Blogger':
return self.redirect('/blogger/delete/start?state=%s' % state)
path = ('/reddit/callback' if kind == 'Reddit'
else '/wordpress/add' if kind == 'WordPress'
else '/%s/delete/finish' % source.SHORT_NAME)
kwargs = {}
if kind == 'Twitter':
kwargs['access_type'] = 'read' if feature == 'listen' else 'write'
handler = source.OAUTH_START_HANDLER.to(path, **kwargs)(self.request, self.response)
try:
self.redirect(handler.redirect_url(state=state))
except Exception as e:
code, body = util.interpret_http_exception(e)
if not code and util.is_connection_failure(e):
code = '-'
body = str(e)
if code:
self.messages.add('%s API error %s: %s' % (source.GR_CLASS.NAME, code, body))
self.redirect(source.bridgy_url(self))
else:
raise
def post(self):
logging.debug('Params: %s', self.request.params)
key = util.get_required_param(self, 'source_key')
source = ndb.Key(urlsafe=key).get()
if not source or source.status == 'disabled' or 'listen' not in source.features:
logging.error('Source not found or disabled. Dropping task.')
return
logging.info('Source: %s %s, %s', source.label(), source.key.string_id(),
source.bridgy_url(self))
post_id = util.get_required_param(self, 'post_id')
source.updates = {}
try:
activities = source.get_activities(
fetch_replies=True, fetch_likes=True, fetch_shares=True,
activity_id=post_id, user_id=source.key.id())
if not activities:
logging.info('Post %s not found.', post_id)
return
assert len(activities) == 1
self.backfeed(source, activities={activities[0]['id']: activities[0]})
except Exception, e:
code, body = util.interpret_http_exception(e)
if (code and (code in util.HTTP_RATE_LIMIT_CODES or code == '400' or
int(code) / 100 == 5)
or util.is_connection_failure(e)):
logging.error('API call failed; giving up. %s: %s\n%s', code, body, e)
self.abort(util.ERROR_HTTP_RETURN_CODE)
else:
raise
def post(self):
source = self.load_source(param='key')
module = self.OAUTH_MODULES[source.key.kind()]
feature = util.get_required_param(self, 'feature')
state = util.encode_oauth_state({
'operation': 'delete',
'feature': feature,
'source': source.key.urlsafe(),
'callback': self.request.get('callback'),
})
# Blogger don't support redirect_url() yet
if module is oauth_blogger_v2:
return self.redirect('/blogger/delete/start?state=%s' % state)
path = ('/instagram/callback' if module is indieauth
else '/wordpress/add' if module is oauth_wordpress_rest
else '/%s/delete/finish' % source.SHORT_NAME)
kwargs = {}
if module is oauth_twitter:
kwargs['access_type'] = 'read' if feature == 'listen' else 'write'
handler = module.StartHandler.to(path, **kwargs)(self.request, self.response)
try:
self.redirect(handler.redirect_url(state=state))
except Exception as e:
code, body = util.interpret_http_exception(e)
if not code and util.is_connection_failure(e):
code = '-'
body = unicode(e)
if code:
self.messages.add('%s API error %s: %s' % (source.GR_CLASS.NAME, code, body))
self.redirect(source.bridgy_url(self))
else:
raise
def get(self, type, source_short_name, string_id, *ids):
source_cls = models.sources.get(source_short_name)
if not source_cls:
self.abort(400, "Source type '%s' not found. Known sources: %s" %
(source_short_name, filter(None, models.sources.keys())))
self.source = source_cls.get_by_id(string_id)
if not self.source:
self.abort(400, 'Source %s %s not found' % (source_short_name, string_id))
format = self.request.get('format', 'html')
if format not in ('html', 'json'):
self.abort(400, 'Invalid format %s, expected html or json' % format)
for id in ids:
if not self.VALID_ID.match(id):
self.abort(404, 'Invalid id %s' % id)
label = '%s:%s %s %s' % (source_short_name, string_id, type, ids)
logging.info('Fetching %s', label)
try:
obj = self.get_item(*ids)
except Exception, e:
# pass through all API HTTP errors if we can identify them
code, body = util.interpret_http_exception(e)
if not code and util.is_connection_failure(e):
code = 503
body = str(e)
if code:
self.response.status_int = int(code)
self.response.headers['Content-Type'] = 'text/plain'
self.response.write('%s error:\n%s' % (self.source.GR_CLASS.NAME, body))
return
else:
raise
def post(self):
try:
self.redirect(self.redirect_url(state=util.get_required_param(self, 'token')))
except Exception as e:
if util.is_connection_failure(e) or util.interpret_http_exception(e)[0]:
self.messages.add("Couldn't fetch your web site: %s" % e)
return self.redirect('/')
raise
def post(self, *path_args):
logging.debug('Params: %s', self.request.params)
key = self.request.params['source_key']
source = ndb.Key(urlsafe=key).get()
if not source or source.status == 'disabled' or 'listen' not in source.features:
logging.error('Source not found or disabled. Dropping task.')
return
logging.info('Source: %s %s, %s', source.label(), source.key.string_id(),
source.bridgy_url(self))
last_polled = self.request.params['last_polled']
if last_polled != source.last_polled.strftime(util.POLL_TASK_DATETIME_FORMAT):
logging.warning('duplicate poll task! deferring to the other task.')
return
logging.info('Last poll: %s', self._last_poll_url(source))
# mark this source as polling
source.updates = {
'poll_status': 'polling',
'last_poll_attempt': util.now_fn(),
'rate_limited': False,
}
source = models.Source.put_updates(source)
source.updates = {}
try:
self.poll(source)
except Exception, e:
source.updates['poll_status'] = 'error'
code, body = util.interpret_http_exception(e)
if code == '401' or isinstance(e, models.DisableSource):
# the user deauthorized the bridgy app, so disable this source.
# let the task complete successfully so that it's not retried.
logging.warning('Disabling source due to: %s' % e, exc_info=True)
source.updates.update({
'status': 'disabled',
'poll_status': 'ok',
})
body = '%s\nLast poll: %s' % (source.bridgy_url(self),
self._last_poll_url(source))
if source.is_beta_user():
util.email_me(subject='Bridgy: disabled %s' % source.label(), body=body)
elif code in util.HTTP_RATE_LIMIT_CODES:
logging.info('Rate limited. Marking as error and finishing. %s', e)
source.updates['rate_limited'] = True
elif ((code and int(code) / 100 == 5) or
(code == '400' and isinstance(source, flickr.Flickr)) or
util.is_connection_failure(e)):
logging.error('API call failed. Marking as error and finishing. %s: %s\n%s',
code, body, e)
self.abort(util.ERROR_HTTP_RETURN_CODE)
else:
raise
def post(self, *path_args):
logging.debug('Params: %s', self.request.params)
key = self.request.params['source_key']
source = ndb.Key(urlsafe=key).get()
if not source or source.status == 'disabled' or 'listen' not in source.features:
logging.error('Source not found or disabled. Dropping task.')
return
logging.info('Source: %s %s, %s', source.label(), source.key.string_id(),
source.bridgy_url(self))
last_polled = self.request.params['last_polled']
if last_polled != source.last_polled.strftime(util.POLL_TASK_DATETIME_FORMAT):
logging.warning('duplicate poll task! deferring to the other task.')
return
logging.info('Last poll: %s', self._last_poll_url(source))
# mark this source as polling
source.updates = {
'poll_status': 'polling',
'last_poll_attempt': util.now_fn(),
'rate_limited': False,
}
source = models.Source.put_updates(source)
source.updates = {}
try:
self.poll(source)
except Exception, e:
source.updates['poll_status'] = 'error'
code, body = util.interpret_http_exception(e)
if code in source.DISABLE_HTTP_CODES or isinstance(e, models.DisableSource):
# the user deauthorized the bridgy app, so disable this source.
# let the task complete successfully so that it's not retried.
logging.warning('Disabling source due to: %s' % e, exc_info=True)
source.updates.update({
'status': 'disabled',
'poll_status': 'ok',
})
body = '%s\nLast poll: %s' % (source.bridgy_url(self),
self._last_poll_url(source))
if source.is_beta_user():
util.email_me(subject='Bridgy: disabled %s' % source.label(), body=body)
elif code in source.RATE_LIMIT_HTTP_CODES:
logging.info('Rate limited. Marking as error and finishing. %s', e)
source.updates['rate_limited'] = True
elif ((code and int(code) / 100 == 5) or
(code == '400' and isinstance(source, flickr.Flickr)) or
util.is_connection_failure(e)):
logging.error('API call failed. Marking as error and finishing. %s: %s\n%s',
code, body, e)
self.abort(util.ERROR_HTTP_RETURN_CODE)
else:
raise
def post(self):
ia_start = util.oauth_starter(indieauth.StartHandler).to('/instagram/callback')(
self.request, self.response)
try:
self.redirect(ia_start.redirect_url(me=util.get_required_param(self, 'user_url')))
except Exception as e:
if util.is_connection_failure(e) or util.interpret_http_exception(e)[0]:
self.messages.add("Couldn't fetch your web site: %s" % e)
return self.redirect('/')
raise
def post(self):
ia_start = util.oauth_starter(indieauth.StartHandler).to('/instagram/callback')(
self.request, self.response)
try:
self.redirect(ia_start.redirect_url(me=util.get_required_param(self, 'user_url')))
except Exception as e:
if util.is_connection_failure(e) or util.interpret_http_exception(e)[0]:
self.messages.add("Couldn't fetch your web site: %s" % e)
return self.redirect('/')
raise
def poll(self, source):
"""Actually runs the poll.
Stores property names and values to update in source.updates.
"""
if source.last_activities_etag or source.last_activity_id:
logging.debug('Using ETag %s, last activity id %s',
source.last_activities_etag, source.last_activity_id)
#
# Step 1: fetch activities:
# * posts by the user
# * search all posts for the user's domain URLs to find links
#
cache = util.CacheDict()
if source.last_activities_cache_json:
cache.update(json.loads(source.last_activities_cache_json))
try:
# search for links first so that the user's activities and responses
# override them if they overlap
links = source.search_for_links()
# this user's own activities (and user mentions)
resp = source.get_activities_response(
fetch_replies=True, fetch_likes=True, fetch_shares=True,
fetch_mentions=True, count=50, etag=source.last_activities_etag,
min_id=source.last_activity_id, cache=cache)
etag = resp.get('etag') # used later
user_activities = resp.get('items', [])
# these map ids to AS objects
responses = {a['id']: a for a in links}
activities = {a['id']: a for a in links + user_activities}
except Exception, e:
code, body = util.interpret_http_exception(e)
if code == '401':
msg = 'Unauthorized error: %s' % e
logging.warning(msg, exc_info=True)
source.updates['poll_status'] = 'ok'
raise models.DisableSource(msg)
elif code in util.HTTP_RATE_LIMIT_CODES:
logging.warning('Rate limited. Marking as error and finishing. %s', e)
source.updates.update({'poll_status': 'error', 'rate_limited': True})
return
elif (code and int(code) / 100 == 5) or util.is_connection_failure(e):
logging.error('API call failed. Marking as error and finishing. %s: %s\n%s',
code, body, e)
self.abort(ERROR_HTTP_RETURN_CODE)
else:
raise
def post(self):
logging.debug('Params: %s', self.request.params)
type = self.request.get('type')
if type:
assert type in ('event', )
source = util.load_source(self)
if not source or source.status == 'disabled' or 'listen' not in source.features:
logging.error('Source not found or disabled. Dropping task.')
return
logging.info('Source: %s %s, %s', source.label(),
source.key.string_id(), source.bridgy_url(self))
post_id = util.get_required_param(self, 'post_id')
source.updates = {}
try:
if type == 'event':
activities = [source.gr_source.get_event(post_id)]
else:
activities = source.get_activities(fetch_replies=True,
fetch_likes=True,
fetch_shares=True,
activity_id=post_id,
user_id=source.key.id())
if not activities or not activities[0]:
logging.info('Post %s not found.', post_id)
return
assert len(activities) == 1, activities
self.backfeed(source,
activities={activities[0]['id']: activities[0]})
obj = activities[0].get('object') or activities[0]
in_reply_to = util.get_first(obj, 'inReplyTo')
if in_reply_to:
parsed = util.parse_tag_uri(in_reply_to.get(
'id', '')) # TODO: fall back to url
if parsed:
util.add_discover_task(source, parsed[1])
except Exception, e:
code, body = util.interpret_http_exception(e)
if (code and (code in source.RATE_LIMIT_HTTP_CODES
or code in ('400', '404') or int(code) / 100 == 5)
or util.is_connection_failure(e)):
logging.error('API call failed; giving up. %s: %s\n%s', code,
body, e)
self.abort(util.ERROR_HTTP_RETURN_CODE)
else:
raise
def dispatch_request(self):
token = request.form['token']
try:
to_url = self.redirect_url(state=token)
except Exception as e:
if util.is_connection_failure(e) or util.interpret_http_exception(
e)[0]:
flash(f"Couldn't fetch your web site: {e}")
return redirect('/')
raise
return redirect(to_url)
def post(self):
logging.debug('Params: %s', self.request.params)
type = self.request.get('type')
if type:
assert type in ('event',)
key = util.get_required_param(self, 'source_key')
source = ndb.Key(urlsafe=key).get()
if not source or source.status == 'disabled' or 'listen' not in source.features:
logging.error('Source not found or disabled. Dropping task.')
return
logging.info('Source: %s %s, %s', source.label(), source.key.string_id(),
source.bridgy_url(self))
post_id = util.get_required_param(self, 'post_id')
source.updates = {}
try:
if type == 'event':
activities = [source.gr_source.get_event(post_id)]
else:
activities = source.get_activities(
fetch_replies=True, fetch_likes=True, fetch_shares=True,
activity_id=post_id, user_id=source.key.id())
if not activities or not activities[0]:
logging.info('Post %s not found.', post_id)
return
assert len(activities) == 1, activities
self.backfeed(source, activities={activities[0]['id']: activities[0]})
in_reply_to = util.get_first(activities[0]['object'], 'inReplyTo')
if in_reply_to:
parsed = util.parse_tag_uri(in_reply_to.get('id', '')) # TODO: fall back to url
if parsed:
util.add_discover_task(source, parsed[1])
except Exception, e:
code, body = util.interpret_http_exception(e)
if (code and (code in util.HTTP_RATE_LIMIT_CODES or
code in ('400', '404') or
int(code) / 100 == 5)
or util.is_connection_failure(e)):
logging.error('API call failed; giving up. %s: %s\n%s', code, body, e)
self.abort(util.ERROR_HTTP_RETURN_CODE)
else:
raise
def post(self):
key = ndb.Key(urlsafe=util.get_required_param(self, 'key'))
module = self.OAUTH_MODULES[key.kind()]
feature = util.get_required_param(self, 'feature')
state = util.encode_oauth_state({
'operation':
'delete',
'feature':
feature,
'source':
key.urlsafe(),
'callback':
self.request.get('callback'),
})
# Google+ and Blogger don't support redirect_url() yet
if module is oauth_googleplus:
return self.redirect('/googleplus/delete/start?state=%s' % state)
if module is oauth_blogger_v2:
return self.redirect('/blogger/delete/start?state=%s' % state)
source = key.get()
path = ('/instagram/callback' if module is indieauth else
'/wordpress/add' if module is oauth_wordpress_rest else
'/%s/delete/finish' % source.SHORT_NAME)
kwargs = {}
if module is oauth_twitter:
kwargs['access_type'] = 'read' if feature == 'listen' else 'write'
handler = module.StartHandler.to(path, **kwargs)(self.request,
self.response)
try:
self.redirect(handler.redirect_url(state=state))
except Exception as e:
code, body = util.interpret_http_exception(e)
if not code and util.is_connection_failure(e):
code = '-'
body = unicode(e)
if code:
self.messages.add('%s API error %s: %s' %
(source.GR_CLASS.NAME, code, body))
self.redirect(source.bridgy_url(self))
else:
raise
def get(self, type, source_short_name, string_id, *ids):
source_cls = models.sources.get(source_short_name)
if not source_cls:
self.abort(
400, "Source type '%s' not found. Known sources: %s" %
(source_short_name, filter(None, models.sources.keys())))
self.source = source_cls.get_by_id(string_id)
if not self.source:
self.abort(
400, 'Source %s %s not found' % (source_short_name, string_id))
format = self.request.get('format', 'html')
if format not in ('html', 'json'):
self.abort(400,
'Invalid format %s, expected html or json' % format)
for id in ids:
if not self.VALID_ID.match(id):
self.abort(404, 'Invalid id %s' % id)
label = '%s:%s %s %s' % (source_short_name, string_id, type, ids)
cache_key = 'H ' + label
obj = memcache.get(cache_key)
if obj:
logging.info('Using cached object for %s', label)
else:
logging.info('Fetching %s', label)
try:
obj = self.get_item(*ids)
except Exception, e:
# pass through all API HTTP errors if we can identify them
code, body = util.interpret_http_exception(e)
if not code and util.is_connection_failure(e):
code = 503
body = str(e)
if code:
self.response.status_int = int(code)
self.response.headers['Content-Type'] = 'text/plain'
self.response.write('%s error:\n%s' %
(self.source.GR_CLASS.NAME, body))
return
else:
raise
memcache.set(cache_key, obj, time=CACHE_TIME)
def post(self, *path_args):
logging.debug("Params: %s", self.request.params)
key = self.request.params["source_key"]
source = ndb.Key(urlsafe=key).get()
if not source or source.status == "disabled" or "listen" not in source.features:
logging.error("Source not found or disabled. Dropping task.")
return
logging.info("Source: %s %s, %s", source.label(), source.key.string_id(), source.bridgy_url(self))
last_polled = self.request.params["last_polled"]
if last_polled != source.last_polled.strftime(util.POLL_TASK_DATETIME_FORMAT):
logging.warning("duplicate poll task! deferring to the other task.")
return
logging.info(
"Last poll: %s/log?start_time=%s&key=%s",
self.request.host_url,
calendar.timegm(source.last_poll_attempt.utctimetuple()),
source.key.urlsafe(),
)
# mark this source as polling
source.updates = {"poll_status": "polling", "last_poll_attempt": util.now_fn()}
source = models.Source.put_updates(source)
source.updates = {}
try:
self.poll(source)
except Exception, e:
source.updates["poll_status"] = "error"
code, body = util.interpret_http_exception(e)
if code == "401" or isinstance(e, models.DisableSource):
# the user deauthorized the bridgy app, so disable this source.
# let the task complete successfully so that it's not retried.
logging.warning("Disabling source due to: %s" % e, exc_info=True)
source.updates.update({"status": "disabled", "poll_status": "ok"})
elif code in util.HTTP_RATE_LIMIT_CODES:
logging.warning("Rate limited. Marking as error and finishing. %s", e)
source.updates["rate_limited"] = True
elif (code and int(code) / 100 == 5) or util.is_connection_failure(e):
logging.error("API call failed. Marking as error and finishing. %s: %s\n%s", code, body, e)
self.abort(ERROR_HTTP_RETURN_CODE)
else:
raise
def background_handle_exception(e):
"""Common exception handler for background tasks.
Catches failed outbound HTTP requests and returns HTTP 304.
"""
if isinstance(e, HTTPException):
# raised by this app itself, pass it through
return str(e), e.code
transients = getattr(g, 'TRANSIENT_ERROR_HTTP_CODES', ())
source = getattr(g, 'source', None)
if source:
transients += source.RATE_LIMIT_HTTP_CODES + source.TRANSIENT_ERROR_HTTP_CODES
code, body = util.interpret_http_exception(e)
if ((code and int(code) // 100 == 5) or code in transients
or util.is_connection_failure(e)):
logger.error(f'Marking as error and finishing. {code}: {body}\n{e}')
return '', util.ERROR_HTTP_RETURN_CODE
raise e
def delete_start():
source = util.load_source()
kind = source.key.kind()
feature = request.form['feature']
state = util.encode_oauth_state({
'operation': 'delete',
'feature': feature,
'source': source.key.urlsafe().decode(),
'callback': request.values.get('callback'),
})
# Blogger don't support redirect_url() yet
if kind == 'Blogger':
return redirect(f'/blogger/delete/start?state={state}')
path = ('/reddit/callback' if kind == 'Reddit' else '/wordpress/add'
if kind == 'WordPress' else f'/{source.SHORT_NAME}/delete/finish')
kwargs = {}
if kind == 'Twitter':
kwargs['access_type'] = 'read' if feature == 'listen' else 'write'
try:
return redirect(source.OAUTH_START(path).redirect_url(state=state))
except werkzeug.exceptions.HTTPException:
# raised by us, probably via self.error()
raise
except Exception as e:
code, body = util.interpret_http_exception(e)
if not code and util.is_connection_failure(e):
code = '-'
body = str(e)
if code:
flash(f'{source.GR_CLASS.NAME} API error {code}: {body}')
return redirect(source.bridgy_url())
else:
raise
def post(self, source_short_name):
logging.info('Params: %self', self.request.params.items())
# strip fragments from source and target url
self.source_url = urlparse.urldefrag(
util.get_required_param(self, 'source'))[0]
self.target_url = urlparse.urldefrag(
util.get_required_param(self, 'target'))[0]
# follow target url through any redirects, strip utm_* query params
resp = util.follow_redirects(self.target_url)
redirected_target_urls = [r.url for r in resp.history]
self.target_url = util.clean_url(resp.url)
# parse and validate target URL
domain = util.domain_from_link(self.target_url)
if not domain:
return self.error('Could not parse target URL %s' %
self.target_url)
# look up source by domain
source_cls = models.sources[source_short_name]
domain = domain.lower()
self.source = (source_cls.query().filter(
source_cls.domains == domain).filter(
source_cls.features == 'webmention').filter(
source_cls.status == 'enabled').get())
if not self.source:
return self.error(
'Could not find %s account for %s. Is it registered with Bridgy?'
% (source_cls.GR_CLASS.NAME, domain))
if urlparse.urlparse(self.target_url).path in ('', '/'):
return self.error(
'Home page webmentions are not currently supported.')
# create BlogWebmention entity
id = u'%s %s' % (self.source_url, self.target_url)
self.entity = BlogWebmention.get_or_insert(
id,
source=self.source.key,
redirected_target_urls=redirected_target_urls)
if self.entity.status == 'complete':
# TODO: response message saying update isn't supported
self.response.write(self.entity.published)
return
logging.debug("BlogWebmention entity: '%s'", self.entity.key.urlsafe())
# fetch source page
resp = self.fetch_mf2(self.source_url)
if not resp:
return
self.fetched, data = resp
item = self.find_mention_item(data)
if not item:
return self.error(
'Could not find target URL %s in source page %s' %
(self.target_url, self.fetched.url),
data=data,
log_exception=False)
# default author to target domain
author_name = domain
author_url = 'http://%s/' % domain
# extract author name and URL from h-card, if any
props = item['properties']
author = first_value(props, 'author')
if author:
if isinstance(author, basestring):
author_name = author
else:
author_props = author.get('properties', {})
author_name = first_value(author_props, 'name')
author_url = first_value(author_props, 'url')
# if present, u-url overrides source url
u_url = first_value(props, 'url')
if u_url:
self.entity.u_url = u_url
# generate content
content = props['content'][
0] # find_mention_item() guaranteed this is here
text = (content.get('html') or content.get('value')).strip()
source_url = self.entity.source_url()
text += ' <br /> <a href="%s">via %s</a>' % (
source_url, util.domain_from_link(source_url))
# write comment
try:
self.entity.published = self.source.create_comment(
self.target_url, author_name, author_url, text)
except Exception as e:
code, body = util.interpret_http_exception(e)
msg = 'Error: %s %s; %s' % (code, e, body)
if code == '401':
logging.warning('Disabling source due to: %s' % e,
exc_info=True)
self.source.status = 'disabled'
self.source.put()
return self.error(msg,
status=code,
mail=self.source.is_beta_user())
elif code == '404':
# post is gone
return self.error(msg, status=code, mail=False)
elif util.is_connection_failure(e) or (code
and int(code) // 100 == 5):
return self.error(msg,
status=util.ERROR_HTTP_RETURN_CODE,
mail=False)
elif code or body:
return self.error(msg, status=code, mail=True)
else:
raise
# write results to datastore
self.entity.status = 'complete'
self.entity.put()
self.response.write(json.dumps(self.entity.published))
def poll(self, source):
"""Actually runs the poll.
Stores property names and values to update in source.updates.
"""
if source.last_activities_etag or source.last_activity_id:
logging.debug('Using ETag %s, last activity id %s',
source.last_activities_etag, source.last_activity_id)
#
# Step 1: fetch activities:
# * posts by the user
# * search all posts for the user's domain URLs to find links
#
cache = util.CacheDict()
if source.last_activities_cache_json:
cache.update(json_loads(source.last_activities_cache_json))
# search for links first so that the user's activities and responses
# override them if they overlap
links = source.search_for_links()
# this user's own activities (and user mentions)
resp = source.get_activities_response(fetch_replies=True,
fetch_likes=True,
fetch_shares=True,
fetch_mentions=True,
count=50,
etag=source.last_activities_etag,
min_id=source.last_activity_id,
cache=cache)
etag = resp.get('etag') # used later
user_activities = resp.get('items', [])
# these map ids to AS objects
responses = {a['id']: a for a in links}
activities = {a['id']: a for a in links + user_activities}
# extract silo activity ids, update last_activity_id
silo_activity_ids = set()
last_activity_id = source.last_activity_id
for id, activity in activities.items():
# maybe replace stored last activity id
parsed = util.parse_tag_uri(id)
if parsed:
id = parsed[1]
silo_activity_ids.add(id)
try:
# try numeric comparison first
greater = int(id) > int(last_activity_id)
except (TypeError, ValueError):
greater = str(id) > str(last_activity_id)
if greater:
last_activity_id = id
if last_activity_id and last_activity_id != source.last_activity_id:
source.updates['last_activity_id'] = last_activity_id
# trim cache to just the returned activity ids, so that it doesn't grow
# without bound. (WARNING: depends on get_activities_response()'s cache key
# format, e.g. 'PREFIX ACTIVITY_ID'!)
source.updates['last_activities_cache_json'] = json_dumps({
k: v
for k, v in cache.items() if k.split()[-1] in silo_activity_ids
})
self.backfeed(source, responses, activities=activities)
source.updates.update({
'last_polled': source.last_poll_attempt,
'poll_status': 'ok'
})
if etag and etag != source.last_activities_etag:
source.updates['last_activities_etag'] = etag
#
# Possibly refetch updated syndication urls.
#
# if the author has added syndication urls since the first time
# original_post_discovery ran, we'll miss them. this cleanup task will
# periodically check for updated urls. only kicks in if the author has
# *ever* published a rel=syndication url
if source.should_refetch():
logging.info('refetching h-feed for source %s', source.label())
relationships = original_post_discovery.refetch(source)
now = util.now_fn()
source.updates['last_hfeed_refetch'] = now
if relationships:
logging.info(
'refetch h-feed found new rel=syndication relationships: %s',
relationships)
try:
self.repropagate_old_responses(source, relationships)
except BaseException as e:
if ('BadRequestError' in str(e.__class__)
or 'Timeout' in str(e.__class__)
or util.is_connection_failure(e)):
logging.info('Timeout while repropagating responses.',
stack_info=True)
else:
raise
else:
logging.info(
'skipping refetch h-feed. last-syndication-url %s, last-refetch %s',
source.last_syndication_url, source.last_hfeed_refetch)
def _run(self):
"""Returns CreationResult on success, None otherwise."""
logging.info('Params: %s', self.request.params.items())
assert self.PREVIEW in (True, False)
# parse and validate target URL
try:
parsed = urlparse.urlparse(self.target_url())
except BaseException:
return self.error('Could not parse target URL %s' % self.target_url())
domain = parsed.netloc
path_parts = parsed.path.rsplit('/', 1)
source_cls = SOURCE_NAMES.get(path_parts[-1])
if (domain not in ('brid.gy', 'www.brid.gy', 'localhost:8080') or
len(path_parts) != 2 or path_parts[0] != '/publish' or not source_cls):
return self.error(
'Target must be brid.gy/publish/{facebook,flickr,twitter,instagram}')
elif source_cls == GooglePlusPage:
return self.error('Sorry, %s is not yet supported.' %
source_cls.GR_CLASS.NAME)
# resolve source URL
url, domain, ok = util.get_webmention_target(
self.source_url(), replace_test_domains=False)
# show nice error message if they're trying to publish a silo post
if domain in SOURCE_DOMAINS:
return self.error(
"Looks like that's a %s URL. Try one from your web site instead!" %
SOURCE_DOMAINS[domain].GR_CLASS.NAME)
elif not ok:
return self.error('Unsupported source URL %s' % url)
elif not domain:
return self.error('Could not parse source URL %s' % url)
# look up source by domain
domain = domain.lower()
sources = source_cls.query().filter(source_cls.domains == domain).fetch(100)
if not sources:
return self.error("Could not find <b>%(type)s</b> account for <b>%(domain)s</b>. Check that your %(type)s profile has %(domain)s in its <em>web site</em> or <em>link</em> field, then try signing up again." %
{'type': source_cls.GR_CLASS.NAME, 'domain': domain})
current_url = ''
for source in sources:
logging.info('Source: %s , features %s, status %s, poll status %s',
source.bridgy_url(self), source.features, source.status,
source.poll_status)
if source.status != 'disabled' and 'publish' in source.features:
# use a source that has a domain_url matching the url provided.
# look through each source to find the one with the closest match.
schemeless_url = util.schemeless(url.lower()).strip('/')
for domain_url in source.domain_urls:
schemeless_domain_url = util.schemeless(domain_url.lower()).strip('/')
if (schemeless_url.startswith(schemeless_domain_url) and
len(domain_url) > len(current_url)):
self.source = source
current_url = domain_url
if not self.source:
return self.error(
'Publish is not enabled for your account. Please visit https://brid.gy and sign up!')
content_param = 'bridgy_%s_content' % self.source.SHORT_NAME
if content_param in self.request.params:
return self.error('The %s parameter is not supported' % content_param)
# show nice error message if they're trying to publish their home page
for domain_url in self.source.domain_urls:
domain_url_parts = urlparse.urlparse(domain_url)
source_url_parts = urlparse.urlparse(self.source_url())
if (source_url_parts.netloc == domain_url_parts.netloc and
source_url_parts.path.strip('/') == domain_url_parts.path.strip('/') and
not source_url_parts.query):
return self.error(
"Looks like that's your home page. Try one of your posts instead!")
# done with the sanity checks, ready to fetch the source url. create the
# Publish entity so we can store the result.
entity = self.get_or_add_publish_entity(url)
if (entity.status == 'complete' and entity.type != 'preview' and
not self.PREVIEW and not appengine_config.DEBUG):
return self.error("Sorry, you've already published that page, and Bridgy Publish doesn't yet support updating or deleting existing posts. Ping Ryan if you want that feature!")
self.entity = entity
# fetch source page
resp = self.fetch_mf2(url)
if not resp:
return
self.fetched, data = resp
# find rel-shortlink, if any
# http://microformats.org/wiki/rel-shortlink
# https://github.com/snarfed/bridgy/issues/173
soup = util.beautifulsoup_parse(self.fetched.text)
shortlinks = (soup.find_all('link', rel='shortlink') +
soup.find_all('a', rel='shortlink') +
soup.find_all('a', class_='shortlink'))
if shortlinks:
self.shortlink = shortlinks[0]['href']
# loop through each item and its children and try to preview/create it. if
# it fails, try the next one. break after the first one that works.
result = None
types = set()
queue = collections.deque(data.get('items', []))
while queue:
item = queue.popleft()
item_types = set(item.get('type'))
if 'h-feed' in item_types and 'h-entry' not in item_types:
queue.extend(item.get('children', []))
continue
elif not item_types & PUBLISHABLE_TYPES:
continue
try:
result = self.attempt_single_item(item)
if self.entity.published:
break
if result.abort:
if result.error_plain:
self.error(result.error_plain, html=result.error_html, data=item)
return
# try the next item
for embedded in ('rsvp', 'invitee', 'repost', 'repost-of', 'like',
'like-of', 'in-reply-to'):
if embedded in item.get('properties', []):
item_types.add(embedded)
logging.info(
'Object type(s) %s not supported; error=%s; trying next.',
item_types, result.error_plain)
types = types.union(item_types)
queue.extend(item.get('children', []))
except BaseException, e:
code, body = util.interpret_http_exception(e)
mail = True
if (not code or code == 500) and util.is_connection_failure(e):
code = 502
mail=False
msg = '%s API error: %s %s' % (self.source.GR_CLASS.NAME, body or '', e)
return self.error(msg, status=code or 500, mail=mail)
def poll(self, source):
"""Actually runs the poll.
Stores property names and values to update in source.updates.
"""
if source.last_activities_etag or source.last_activity_id:
logging.debug("Using ETag %s, last activity id %s", source.last_activities_etag, source.last_activity_id)
#
# Step 1: fetch activities:
# * posts by the user
# * search all posts for the user's domain URLs to find links
#
cache = util.CacheDict()
if source.last_activities_cache_json:
cache.update(json.loads(source.last_activities_cache_json))
# search for links first so that the user's activities and responses
# override them if they overlap
links = source.search_for_links()
# this user's own activities (and user mentions)
resp = source.get_activities_response(
fetch_replies=True,
fetch_likes=True,
fetch_shares=True,
fetch_mentions=True,
count=50,
etag=source.last_activities_etag,
min_id=source.last_activity_id,
cache=cache,
)
etag = resp.get("etag") # used later
user_activities = resp.get("items", [])
# these map ids to AS objects
responses = {a["id"]: a for a in links}
activities = {a["id"]: a for a in links + user_activities}
# extract silo activity ids, update last_activity_id
silo_activity_ids = set()
last_activity_id = source.last_activity_id
for id, activity in activities.items():
# maybe replace stored last activity id
parsed = util.parse_tag_uri(id)
if parsed:
id = parsed[1]
silo_activity_ids.add(id)
try:
# try numeric comparison first
greater = int(id) > int(last_activity_id)
except (TypeError, ValueError):
greater = id > last_activity_id
if greater:
last_activity_id = id
if last_activity_id and last_activity_id != source.last_activity_id:
source.updates["last_activity_id"] = last_activity_id
# trim cache to just the returned activity ids, so that it doesn't grow
# without bound. (WARNING: depends on get_activities_response()'s cache key
# format, e.g. 'PREFIX ACTIVITY_ID'!)
source.updates["last_activities_cache_json"] = json.dumps(
{k: v for k, v in cache.items() if k.split()[-1] in silo_activity_ids}
)
# Cache to make sure we only fetch the author's h-feed(s) the
# first time we see it
fetched_hfeeds = set()
# narrow down to just public activities
public = {}
private = {}
for id, activity in activities.items():
(public if source.is_activity_public(activity) else private)[id] = activity
logging.info("Found %d public activities: %s", len(public), public.keys())
logging.info("Found %d private activities: %s", len(private), private.keys())
last_public_post = (source.last_public_post or util.EPOCH).isoformat()
public_published = util.trim_nulls([a.get("published") for a in public.values()])
if public_published:
max_published = max(public_published)
if max_published > last_public_post:
last_public_post = max_published
source.updates["last_public_post"] = util.as_utc(util.parse_iso8601(max_published))
source.updates["recent_private_posts"] = len(
[a for a in private.values() if a.get("published", util.EPOCH_ISO) > last_public_post]
)
#
# Step 2: extract responses, store their activities in response['activities']
#
# WARNING: this creates circular references in link posts found by search
# queries in step 1, since they are their own activity. We use
# prune_activity() and prune_response() in step 4 to remove these before
# serializing to JSON.
#
for id, activity in public.items():
obj = activity.get("object") or activity
# handle user mentions
user_id = source.user_tag_id()
if obj.get("author", {}).get("id") != user_id:
for tag in obj.get("tags", []):
urls = tag.get("urls")
if tag.get("objectType") == "person" and tag.get("id") == user_id and urls:
activity["originals"], activity["mentions"] = original_post_discovery.discover(
source,
activity,
fetch_hfeed=True,
include_redirect_sources=False,
already_fetched_hfeeds=fetched_hfeeds,
)
activity["mentions"].update(u.get("value") for u in urls)
responses[id] = activity
break
# handle quote mentions
for att in obj.get("attachments", []):
if (
att.get("objectType") in ("note", "article")
and att.get("author", {}).get("id") == source.user_tag_id()
):
# now that we've confirmed that one exists, OPD will dig
# into the actual attachments
if "originals" not in activity or "mentions" not in activity:
activity["originals"], activity["mentions"] = original_post_discovery.discover(
source,
activity,
fetch_hfeed=True,
include_redirect_sources=False,
already_fetched_hfeeds=fetched_hfeeds,
)
responses[id] = activity
break
# extract replies, likes, reactions, reposts, and rsvps
replies = obj.get("replies", {}).get("items", [])
tags = obj.get("tags", [])
likes = [t for t in tags if Response.get_type(t) == "like"]
reactions = [t for t in tags if Response.get_type(t) == "react"]
reposts = [t for t in tags if Response.get_type(t) == "repost"]
rsvps = Source.get_rsvps_from_event(obj)
# coalesce responses. drop any without ids
for resp in replies + likes + reactions + reposts + rsvps:
id = resp.get("id")
if not id:
logging.error("Skipping response without id: %s", json.dumps(resp, indent=2))
continue
resp.setdefault("activities", []).append(activity)
# when we find two responses with the same id, the earlier one may have
# come from a link post or user mention, and this one is probably better
# since it probably came from the user's activity, so prefer this one.
# background: https://github.com/snarfed/bridgy/issues/533
existing = responses.get(id)
if existing:
if source.gr_source.activity_changed(resp, existing, log=True):
logging.warning("Got two different versions of same response!\n%s\n%s", existing, resp)
resp["activities"].extend(existing.get("activities", []))
responses[id] = resp
#
# Step 3: filter out responses we've already seen
#
# seen responses (JSON objects) for each source are stored in its entity.
unchanged_responses = []
if source.seen_responses_cache_json:
for seen in json.loads(source.seen_responses_cache_json):
id = seen["id"]
resp = responses.get(id)
if resp and not source.gr_source.activity_changed(seen, resp, log=True):
unchanged_responses.append(seen)
del responses[id]
#
# Step 4: store new responses and enqueue propagate tasks
#
pruned_responses = []
for id, resp in responses.items():
resp_type = Response.get_type(resp)
activities = resp.pop("activities", [])
if not activities and resp_type == "post":
activities = [resp]
too_long = set()
urls_to_activity = {}
for i, activity in enumerate(activities):
# we'll usually have multiple responses for the same activity, and the
# objects in resp['activities'] are shared, so cache each activity's
# discovered webmention targets inside its object.
if "originals" not in activity or "mentions" not in activity:
activity["originals"], activity["mentions"] = original_post_discovery.discover(
source,
activity,
fetch_hfeed=True,
include_redirect_sources=False,
already_fetched_hfeeds=fetched_hfeeds,
)
targets = original_post_discovery.targets_for_response(
resp, originals=activity["originals"], mentions=activity["mentions"]
)
if targets:
logging.info(
"%s has %d webmention target(s): %s", activity.get("url"), len(targets), " ".join(targets)
)
for t in targets:
if len(t) <= _MAX_STRING_LENGTH:
urls_to_activity[t] = i
else:
logging.warning("Giving up on target URL over %s chars! %s", _MAX_STRING_LENGTH, t)
too_long.add(t[: _MAX_STRING_LENGTH - 4] + "...")
# store/update response entity. the prune_*() calls are important to
# remove circular references in link responses, which are their own
# activities. details in the step 2 comment above.
pruned_response = util.prune_response(resp)
pruned_responses.append(pruned_response)
resp_entity = Response(
id=id,
source=source.key,
activities_json=[json.dumps(util.prune_activity(a, source)) for a in activities],
response_json=json.dumps(pruned_response),
type=resp_type,
unsent=list(urls_to_activity.keys()),
failed=list(too_long),
original_posts=resp.get("originals", []),
)
if urls_to_activity and len(activities) > 1:
resp_entity.urls_to_activity = json.dumps(urls_to_activity)
resp_entity.get_or_save(source)
# update cache
if pruned_responses:
source.updates["seen_responses_cache_json"] = json.dumps(pruned_responses + unchanged_responses)
source.updates.update({"last_polled": source.last_poll_attempt, "poll_status": "ok"})
if etag and etag != source.last_activities_etag:
source.updates["last_activities_etag"] = etag
#
# Step 5. possibly refetch updated syndication urls
#
# if the author has added syndication urls since the first time
# original_post_discovery ran, we'll miss them. this cleanup task will
# periodically check for updated urls. only kicks in if the author has
# *ever* published a rel=syndication url
if source.should_refetch():
logging.info("refetching h-feed for source %s", source.label())
relationships = original_post_discovery.refetch(source)
now = util.now_fn()
source.updates["last_hfeed_refetch"] = now
if relationships:
logging.info("refetch h-feed found new rel=syndication relationships: %s", relationships)
try:
self.repropagate_old_responses(source, relationships)
except BaseException, e:
if isinstance(
e, (datastore_errors.BadRequestError, datastore_errors.Timeout)
) or util.is_connection_failure(e):
logging.info("Timeout while repropagating responses.", exc_info=True)
else:
raise
def post(self, source_short_name):
logging.info('Params: %s', list(self.request.params.items()))
# strip fragments from source and target url
self.source_url = urllib.parse.urldefrag(
util.get_required_param(self, 'source'))[0]
self.target_url = urllib.parse.urldefrag(
util.get_required_param(self, 'target'))[0]
# follow target url through any redirects, strip utm_* query params
resp = util.follow_redirects(self.target_url)
redirected_target_urls = [r.url for r in resp.history]
self.target_url = util.clean_url(resp.url)
# parse and validate target URL
domain = util.domain_from_link(self.target_url)
if not domain:
return self.error('Could not parse target URL %s' %
self.target_url)
# look up source by domain
source_cls = models.sources[source_short_name]
domain = domain.lower()
self.source = (source_cls.query().filter(
source_cls.domains == domain).filter(
source_cls.features == 'webmention').filter(
source_cls.status == 'enabled').get())
if not self.source:
# check for a rel-canonical link. Blogger uses these when it serves a post
# from multiple domains, e.g country TLDs like epeus.blogspot.co.uk vs
# epeus.blogspot.com.
# https://github.com/snarfed/bridgy/issues/805
mf2 = self.fetch_mf2(self.target_url, require_mf2=False)
if not mf2:
# fetch_mf2() already wrote the error response
return
domains = util.dedupe_urls(
util.domain_from_link(url)
for url in mf2[1]['rels'].get('canonical', []))
if domains:
self.source = (source_cls.query().filter(
source_cls.domains.IN(domains)).filter(
source_cls.features == 'webmention').filter(
source_cls.status == 'enabled').get())
if not self.source:
return self.error(
'Could not find %s account for %s. Is it registered with Bridgy?'
% (source_cls.GR_CLASS.NAME, domain))
# check that the target URL path is supported
target_path = urllib.parse.urlparse(self.target_url).path
if target_path in ('', '/'):
return self.error(
'Home page webmentions are not currently supported.',
status=202)
for pattern in self.source.PATH_BLOCKLIST:
if pattern.match(target_path):
return self.error(
'%s webmentions are not supported for URL path: %s' %
(self.source.GR_CLASS.NAME, target_path),
status=202)
# create BlogWebmention entity
id = '%s %s' % (self.source_url, self.target_url)
self.entity = BlogWebmention.get_or_insert(
id,
source=self.source.key,
redirected_target_urls=redirected_target_urls)
if self.entity.status == 'complete':
# TODO: response message saying update isn't supported
self.response.write(self.entity.published)
return
logging.debug("BlogWebmention entity: '%s'",
self.entity.key.urlsafe().decode())
# fetch source page
fetched = self.fetch_mf2(self.source_url)
if not fetched:
return
resp, mf2 = fetched
item = self.find_mention_item(mf2.get('items', []))
if not item:
return self.error(
'Could not find target URL %s in source page %s' %
(self.target_url, resp.url),
data=mf2,
log_exception=False)
# default author to target domain
author_name = domain
author_url = 'http://%s/' % domain
# extract author name and URL from h-card, if any
props = item['properties']
author = first_value(props, 'author')
if author:
if isinstance(author, str):
author_name = author
else:
author_props = author.get('properties', {})
author_name = first_value(author_props, 'name')
author_url = first_value(author_props, 'url')
# if present, u-url overrides source url
u_url = first_value(props, 'url')
if u_url:
self.entity.u_url = u_url
# generate content
content = props['content'][
0] # find_mention_item() guaranteed this is here
text = (content.get('html') or content.get('value')).strip()
source_url = self.entity.source_url()
text += ' <br /> <a href="%s">via %s</a>' % (
source_url, util.domain_from_link(source_url))
# write comment
try:
self.entity.published = self.source.create_comment(
self.target_url, author_name, author_url, text)
except Exception as e:
code, body = util.interpret_http_exception(e)
msg = 'Error: %s %s; %s' % (code, e, body)
if code == '401':
logging.warning('Disabling source due to: %s' % e,
stack_info=True)
self.source.status = 'disabled'
self.source.put()
return self.error(msg,
status=code,
report=self.source.is_beta_user())
elif code == '404':
# post is gone
return self.error(msg, status=code, report=False)
elif util.is_connection_failure(e) or (code
and int(code) // 100 == 5):
return self.error(msg,
status=util.ERROR_HTTP_RETURN_CODE,
report=False)
elif code or body:
return self.error(msg, status=code, report=True)
else:
raise
# write results to datastore
self.entity.status = 'complete'
self.entity.put()
self.response.write(json_dumps(self.entity.published))
class Poll(webapp2.RequestHandler):
"""Task handler that fetches and processes new responses from a single source.
Request parameters:
source_key: string key of source entity
last_polled: timestamp, YYYY-MM-DD-HH-MM-SS
Inserts a propagate task for each response that hasn't been seen before.
"""
def post(self, *path_args):
logging.debug('Params: %s', self.request.params)
key = self.request.params['source_key']
source = ndb.Key(urlsafe=key).get()
if not source or source.status == 'disabled' or 'listen' not in source.features:
logging.error('Source not found or disabled. Dropping task.')
return
logging.info('Source: %s %s, %s', source.label(),
source.key.string_id(), source.bridgy_url(self))
last_polled = self.request.params['last_polled']
if last_polled != source.last_polled.strftime(
util.POLL_TASK_DATETIME_FORMAT):
logging.warning(
'duplicate poll task! deferring to the other task.')
return
logging.info('Last poll: %s/log?start_time=%s&key=%s',
self.request.host_url,
calendar.timegm(source.last_poll_attempt.utctimetuple()),
source.key.urlsafe())
# mark this source as polling
source.updates = {
'poll_status': 'polling',
'last_poll_attempt': util.now_fn(),
}
source = models.Source.put_updates(source)
source.updates = {}
try:
self.poll(source)
except models.DisableSource:
# the user deauthorized the bridgy app, so disable this source.
# let the task complete successfully so that it's not retried.
source.updates['status'] = 'disabled'
logging.warning('Disabling source!')
except:
source.updates['poll_status'] = 'error'
raise
finally:
source = models.Source.put_updates(source)
# add new poll task. randomize task ETA to within +/- 20% to try to spread
# out tasks and prevent thundering herds.
task_countdown = source.poll_period().total_seconds() * random.uniform(
.8, 1.2)
util.add_poll_task(source, countdown=task_countdown)
# feeble attempt to avoid hitting the instance memory limit
source = None
gc.collect()
def poll(self, source):
"""Actually runs the poll.
Stores property names and values to update in source.updates.
"""
if source.last_activities_etag or source.last_activity_id:
logging.debug('Using ETag %s, last activity id %s',
source.last_activities_etag, source.last_activity_id)
#
# Step 1: fetch activities:
# * posts by the user
# * search all posts for the user's domain URLs to find links
#
cache = util.CacheDict()
if source.last_activities_cache_json:
cache.update(json.loads(source.last_activities_cache_json))
try:
# search for links first so that the user's activities and responses
# override them if they overlap
links = source.search_for_links()
# this user's own activities (and user mentions)
resp = source.get_activities_response(
fetch_replies=True,
fetch_likes=True,
fetch_shares=True,
fetch_mentions=True,
count=50,
etag=source.last_activities_etag,
min_id=source.last_activity_id,
cache=cache)
etag = resp.get('etag') # used later
user_activities = resp.get('items', [])
# these map ids to AS objects
responses = {a['id']: a for a in links}
activities = {a['id']: a for a in links + user_activities}
except Exception, e:
code, body = util.interpret_http_exception(e)
if code == '401':
msg = 'Unauthorized error: %s' % e
logging.warning(msg, exc_info=True)
source.updates['poll_status'] = 'ok'
raise models.DisableSource(msg)
elif code in util.HTTP_RATE_LIMIT_CODES:
logging.warning(
'Rate limited. Marking as error and finishing. %s', e)
source.updates.update({
'poll_status': 'error',
'rate_limited': True
})
return
elif (code
and int(code) / 100 == 5) or util.is_connection_failure(e):
logging.error(
'API call failed. Marking as error and finishing. %s: %s\n%s',
code, body, e)
self.abort(ERROR_HTTP_RETURN_CODE)
else:
raise
# extract silo activity ids, update last_activity_id
silo_activity_ids = set()
last_activity_id = source.last_activity_id
for id, activity in activities.items():
# maybe replace stored last activity id
parsed = util.parse_tag_uri(id)
if parsed:
id = parsed[1]
silo_activity_ids.add(id)
try:
# try numeric comparison first
greater = int(id) > int(last_activity_id)
except (TypeError, ValueError):
greater = id > last_activity_id
if greater:
last_activity_id = id
if last_activity_id and last_activity_id != source.last_activity_id:
source.updates['last_activity_id'] = last_activity_id
# trim cache to just the returned activity ids, so that it doesn't grow
# without bound. (WARNING: depends on get_activities_response()'s cache key
# format, e.g. 'PREFIX ACTIVITY_ID'!)
source.updates['last_activities_cache_json'] = json.dumps({
k: v
for k, v in cache.items() if k.split()[-1] in silo_activity_ids
})
# Cache to make sure we only fetch the author's h-feed(s) the
# first time we see it
fetched_hfeeds = set()
# narrow down to just public activities
public = {}
private = {}
for id, activity in activities.items():
(public if source.is_activity_public(activity) else
private)[id] = activity
logging.info('Found %d public activities: %s', len(public),
public.keys())
logging.info('Found %d private activities: %s', len(private),
private.keys())
last_public_post = (source.last_public_post or util.EPOCH).isoformat()
public_published = util.trim_nulls(
[a.get('published') for a in public.values()])
if public_published:
max_published = max(public_published)
if max_published > last_public_post:
last_public_post = max_published
source.updates['last_public_post'] = \
util.as_utc(util.parse_iso8601(max_published))
source.updates['recent_private_posts'] = \
len([a for a in private.values()
if a.get('published', util.EPOCH_ISO) > last_public_post])
#
# Step 2: extract responses, store their activities in response['activities']
#
# WARNING: this creates circular references in link posts found by search
# queries in step 1, since they are their own activity. We use
# prune_activity() and prune_response() in step 4 to remove these before
# serializing to JSON.
#
for id, activity in public.items():
obj = activity.get('object') or activity
# handle user mentions
user_id = source.user_tag_id()
if obj.get('author', {}).get('id') != user_id:
for tag in obj.get('tags', []):
urls = tag.get('urls')
if tag.get('objectType') == 'person' and tag.get(
'id') == user_id and urls:
activity['originals'], activity['mentions'] = \
original_post_discovery.discover(
source, activity, fetch_hfeed=True,
include_redirect_sources=False,
already_fetched_hfeeds=fetched_hfeeds)
activity['mentions'].update(
u.get('value') for u in urls)
responses[id] = activity
break
# handle quote mentions
for att in obj.get('attachments', []):
if (att.get('objectType') in ('note', 'article') and att.get(
'author', {}).get('id') == source.user_tag_id()):
# now that we've confirmed that one exists, OPD will dig
# into the actual attachments
if 'originals' not in activity or 'mentions' not in activity:
activity['originals'], activity['mentions'] = \
original_post_discovery.discover(
source, activity, fetch_hfeed=True,
include_redirect_sources=False,
already_fetched_hfeeds=fetched_hfeeds)
responses[id] = activity
break
# extract replies, likes, reactions, reposts, and rsvps
replies = obj.get('replies', {}).get('items', [])
tags = obj.get('tags', [])
likes = [t for t in tags if Response.get_type(t) == 'like']
reactions = [t for t in tags if Response.get_type(t) == 'react']
reposts = [t for t in tags if Response.get_type(t) == 'repost']
rsvps = Source.get_rsvps_from_event(obj)
# coalesce responses. drop any without ids
for resp in replies + likes + reactions + reposts + rsvps:
id = resp.get('id')
if not id:
logging.error('Skipping response without id: %s',
json.dumps(resp, indent=2))
continue
resp.setdefault('activities', []).append(activity)
# when we find two responses with the same id, the earlier one may have
# come from a link post or user mention, and this one is probably better
# since it probably came from the user's activity, so prefer this one.
# background: https://github.com/snarfed/bridgy/issues/533
existing = responses.get(id)
if existing:
if source.gr_source.activity_changed(resp,
existing,
log=True):
logging.warning(
'Got two different versions of same response!\n%s\n%s',
existing, resp)
resp['activities'].extend(existing.get('activities', []))
responses[id] = resp
#
# Step 3: filter out responses we've already seen
#
# seen responses (JSON objects) for each source are stored in its entity.
unchanged_responses = []
if source.seen_responses_cache_json:
for seen in json.loads(source.seen_responses_cache_json):
id = seen['id']
resp = responses.get(id)
if resp and not source.gr_source.activity_changed(
seen, resp, log=True):
unchanged_responses.append(seen)
del responses[id]
#
# Step 4: store new responses and enqueue propagate tasks
#
pruned_responses = []
for id, resp in responses.items():
resp_type = Response.get_type(resp)
activities = resp.pop('activities', [])
if not activities and resp_type == 'post':
activities = [resp]
too_long = set()
urls_to_activity = {}
for i, activity in enumerate(activities):
# we'll usually have multiple responses for the same activity, and the
# objects in resp['activities'] are shared, so cache each activity's
# discovered webmention targets inside its object.
if 'originals' not in activity or 'mentions' not in activity:
activity['originals'], activity['mentions'] = \
original_post_discovery.discover(
source, activity, fetch_hfeed=True,
include_redirect_sources=False,
already_fetched_hfeeds=fetched_hfeeds)
targets = original_post_discovery.targets_for_response(
resp,
originals=activity['originals'],
mentions=activity['mentions'])
if targets:
logging.info('%s has %d webmention target(s): %s',
activity.get('url'), len(targets),
' '.join(targets))
for t in targets:
if len(t) <= _MAX_STRING_LENGTH:
urls_to_activity[t] = i
else:
logging.warning(
'Giving up on target URL over %s chars! %s',
_MAX_STRING_LENGTH, t)
too_long.add(t[:_MAX_STRING_LENGTH - 4] + '...')
# store/update response entity. the prune_*() calls are important to
# remove circular references in link responses, which are their own
# activities. details in the step 2 comment above.
pruned_response = util.prune_response(resp)
pruned_responses.append(pruned_response)
resp_entity = Response(id=id,
source=source.key,
activities_json=[
json.dumps(
util.prune_activity(a, source))
for a in activities
],
response_json=json.dumps(pruned_response),
type=resp_type,
unsent=list(urls_to_activity.keys()),
failed=list(too_long),
original_posts=resp.get('originals', []))
if urls_to_activity and len(activities) > 1:
resp_entity.urls_to_activity = json.dumps(urls_to_activity)
resp_entity.get_or_save(source)
# update cache
if pruned_responses:
source.updates['seen_responses_cache_json'] = json.dumps(
pruned_responses + unchanged_responses)
source.updates.update({
'last_polled': source.last_poll_attempt,
'poll_status': 'ok'
})
if etag and etag != source.last_activities_etag:
source.updates['last_activities_etag'] = etag
#
# Step 5. possibly refetch updated syndication urls
#
# if the author has added syndication urls since the first time
# original_post_discovery ran, we'll miss them. this cleanup task will
# periodically check for updated urls. only kicks in if the author has
# *ever* published a rel=syndication url
if source.should_refetch():
logging.info('refetching h-feed for source %s', source.label())
relationships = original_post_discovery.refetch(source)
now = util.now_fn()
source.updates['last_hfeed_refetch'] = now
if relationships:
logging.info(
'refetch h-feed found new rel=syndication relationships: %s',
relationships)
try:
self.repropagate_old_responses(source, relationships)
except BaseException, e:
if (isinstance(e, (datastore_errors.BadRequestError,
datastore_errors.Timeout))
or util.is_connection_failure(e)):
logging.info('Timeout while repropagating responses.',
exc_info=True)
else:
raise
def get(self, type, source_short_name, string_id, *ids):
source_cls = models.sources.get(source_short_name)
if not source_cls:
self.abort(400, "Source type '%s' not found. Known sources: %s" %
(source_short_name, filter(None, models.sources.keys())))
self.source = source_cls.get_by_id(string_id)
if not self.source:
self.abort(400, 'Source %s %s not found' % (source_short_name, string_id))
elif self.source.status == 'disabled' or 'listen' not in self.source.features:
self.abort(400, 'Source %s is disabled for backfeed' % self.source.bridgy_path())
format = self.request.get('format', 'html')
if format not in ('html', 'json'):
self.abort(400, 'Invalid format %s, expected html or json' % format)
for id in ids:
if not self.VALID_ID.match(id):
self.abort(404, 'Invalid id %s' % id)
label = '%s:%s %s %s' % (source_short_name, string_id, type, ids)
cache_key = 'H ' + label
obj = memcache.get(cache_key)
if obj:
logging.info('Using cached object for %s', label)
else:
logging.info('Fetching %s', label)
try:
obj = self.get_item(*ids)
except models.DisableSource as e:
self.abort(401, "Bridgy's access to your account has expired. Please visit https://brid.gy/ to refresh it!")
except Exception as e:
# pass through all API HTTP errors if we can identify them
code, body = util.interpret_http_exception(e)
if not code and util.is_connection_failure(e):
code = 503
body = str(e)
if code:
self.response.status_int = int(code)
self.response.headers['Content-Type'] = 'text/plain'
self.response.write('%s error:\n%s' % (self.source.GR_CLASS.NAME, body))
return
else:
raise
memcache.set(cache_key, obj, time=CACHE_TIME)
if not obj:
self.abort(404, label)
# use https for profile pictures so we don't cause SSL mixed mode errors
# when serving over https.
author = obj.get('author', {})
image = author.get('image', {})
url = image.get('url')
if url:
image['url'] = util.update_scheme(url, self)
mf2_json = microformats2.object_to_json(obj, synthesize_content=False)
# try to include the author's silo profile url
author = first_props(mf2_json.get('properties', {})).get('author', {})
author_uid = first_props(author.get('properties', {})).get('uid', '')
if author_uid:
parsed = util.parse_tag_uri(author_uid)
if parsed:
silo_url = self.source.gr_source.user_url(parsed[1])
urls = author.get('properties', {}).setdefault('url', [])
if silo_url not in microformats2.get_string_urls(urls):
urls.append(silo_url)
# write the response!
self.response.headers['Access-Control-Allow-Origin'] = '*'
if format == 'html':
self.response.headers['Content-Type'] = 'text/html; charset=utf-8'
self.response.out.write(TEMPLATE.substitute({
'url': obj.get('url', ''),
'body': microformats2.json_to_html(mf2_json),
'title': self.get_title(obj),
}))
elif format == 'json':
self.response.headers['Content-Type'] = 'application/json; charset=utf-8'
self.response.out.write(json.dumps(mf2_json, indent=2))
def poll(self, source):
"""Actually runs the poll.
Stores property names and values to update in source.updates.
"""
if source.last_activities_etag or source.last_activity_id:
logging.debug('Using ETag %s, last activity id %s',
source.last_activities_etag, source.last_activity_id)
#
# Step 1: fetch activities:
# * posts by the user
# * search all posts for the user's domain URLs to find links
#
cache = util.CacheDict()
if source.last_activities_cache_json:
cache.update(json.loads(source.last_activities_cache_json))
try:
# search for links first so that the user's activities and responses
# override them if they overlap
links = source.search_for_links()
# this user's own activities (and user mentions)
resp = source.get_activities_response(
fetch_replies=True,
fetch_likes=True,
fetch_shares=True,
fetch_mentions=True,
count=50,
etag=source.last_activities_etag,
min_id=source.last_activity_id,
cache=cache)
etag = resp.get('etag') # used later
user_activities = resp.get('items', [])
# these map ids to AS objects
responses = {a['id']: a for a in links}
activities = {a['id']: a for a in links + user_activities}
except Exception, e:
code, body = util.interpret_http_exception(e)
if code == '401':
msg = 'Unauthorized error: %s' % e
logging.warning(msg, exc_info=True)
source.updates['poll_status'] = 'ok'
raise models.DisableSource(msg)
elif code in util.HTTP_RATE_LIMIT_CODES:
logging.warning(
'Rate limited. Marking as error and finishing. %s', e)
source.updates.update({
'poll_status': 'error',
'rate_limited': True
})
return
elif (code
and int(code) / 100 == 5) or util.is_connection_failure(e):
logging.error(
'API call failed. Marking as error and finishing. %s: %s\n%s',
code, body, e)
self.abort(ERROR_HTTP_RETURN_CODE)
else:
raise
def post(self, *path_args):
logging.debug('Params: %s', self.request.params)
key = self.request.params['source_key']
source = ndb.Key(urlsafe=key).get()
if not source or source.status == 'disabled' or 'listen' not in source.features:
logging.error('Source not found or disabled. Dropping task.')
return
logging.info('Source: %s %s, %s', source.label(), source.key.string_id(),
source.bridgy_url(self))
last_polled = self.request.params['last_polled']
if last_polled != source.last_polled.strftime(util.POLL_TASK_DATETIME_FORMAT):
logging.warning('duplicate poll task! deferring to the other task.')
return
logging.info('Last poll: %s', self._last_poll_url(source))
# mark this source as polling
source.updates = {
'poll_status': 'polling',
'last_poll_attempt': util.now_fn(),
'rate_limited': False,
}
source = models.Source.put_updates(source)
source.updates = {}
try:
self.poll(source)
except Exception as e:
source.updates['poll_status'] = 'error'
code, body = util.interpret_http_exception(e)
if code in source.DISABLE_HTTP_CODES or isinstance(e, models.DisableSource):
# the user deauthorized the bridgy app, so disable this source.
# let the task complete successfully so that it's not retried.
logging.warning('Disabling source due to: %s' % e, exc_info=True)
source.updates.update({
'status': 'disabled',
'poll_status': 'ok',
})
body = '%s\nLast poll: %s' % (source.bridgy_url(self),
self._last_poll_url(source))
elif code in source.RATE_LIMIT_HTTP_CODES:
logging.info('Rate limited. Marking as error and finishing. %s', e)
source.updates['rate_limited'] = True
elif ((code and int(code) // 100 == 5) or
code in source.TRANSIENT_ERROR_HTTP_CODES or
util.is_connection_failure(e)):
logging.error('API call failed. Marking as error and finishing. %s: %s\n%s',
code, body, e)
self.abort(util.ERROR_HTTP_RETURN_CODE)
else:
raise
finally:
source = models.Source.put_updates(source)
# add new poll task. randomize task ETA to within +/- 20% to try to spread
# out tasks and prevent thundering herds.
task_countdown = source.poll_period().total_seconds() * random.uniform(.8, 1.2)
util.add_poll_task(source, countdown=task_countdown)
# feeble attempt to avoid hitting the instance memory limit
source = None
gc.collect()
def post(self, source_short_name):
logging.info('Params: %self', self.request.params.items())
# strip fragments from source and target url
self.source_url = urlparse.urldefrag(util.get_required_param(self, 'source'))[0]
self.target_url = urlparse.urldefrag(util.get_required_param(self, 'target'))[0]
# follow target url through any redirects, strip utm_* query params
resp = util.follow_redirects(self.target_url)
redirected_target_urls = [r.url for r in resp.history]
self.target_url = util.clean_url(resp.url)
# parse and validate target URL
domain = util.domain_from_link(self.target_url)
if not domain:
return self.error('Could not parse target URL %s' % self.target_url)
# look up source by domain
source_cls = models.sources[source_short_name]
domain = domain.lower()
self.source = (source_cls.query()
.filter(source_cls.domains == domain)
.filter(source_cls.features == 'webmention')
.filter(source_cls.status == 'enabled')
.get())
if not self.source:
# check for a rel-canonical link. Blogger uses these when it serves a post
# from multiple domains, e.g country TLDs like epeus.blogspot.co.uk vs
# epeus.blogspot.com.
# https://github.com/snarfed/bridgy/issues/805
mf2 = self.fetch_mf2(self.target_url, require_mf2=False)
if not mf2:
# fetch_mf2() already wrote the error response
return
domains = util.dedupe_urls(
util.domain_from_link(url)
for url in mf2[1].get('rels', {}).get('canonical', []))
if domains:
self.source = (source_cls.query()
.filter(source_cls.domains.IN(domains))
.filter(source_cls.features == 'webmention')
.filter(source_cls.status == 'enabled')
.get())
if not self.source:
return self.error(
'Could not find %s account for %s. Is it registered with Bridgy?' %
(source_cls.GR_CLASS.NAME, domain))
# check that the target URL path is supported
target_path = urlparse.urlparse(self.target_url).path
if target_path in ('', '/'):
return self.error('Home page webmentions are not currently supported.',
status=202)
for pattern in self.source.PATH_BLACKLIST:
if pattern.match(target_path):
return self.error('%s webmentions are not supported for URL path: %s' %
(self.source.GR_CLASS.NAME, target_path), status=202)
# create BlogWebmention entity
id = '%s %s' % (self.source_url, self.target_url)
self.entity = BlogWebmention.get_or_insert(
id, source=self.source.key, redirected_target_urls=redirected_target_urls)
if self.entity.status == 'complete':
# TODO: response message saying update isn't supported
self.response.write(self.entity.published)
return
logging.debug("BlogWebmention entity: '%s'", self.entity.key.urlsafe())
# fetch source page
resp = self.fetch_mf2(self.source_url)
if not resp:
return
self.fetched, data = resp
item = self.find_mention_item(data.get('items', []))
if not item:
return self.error('Could not find target URL %s in source page %s' %
(self.target_url, self.fetched.url),
data=data, log_exception=False)
# default author to target domain
author_name = domain
author_url = 'http://%s/' % domain
# extract author name and URL from h-card, if any
props = item['properties']
author = first_value(props, 'author')
if author:
if isinstance(author, basestring):
author_name = author
else:
author_props = author.get('properties', {})
author_name = first_value(author_props, 'name')
author_url = first_value(author_props, 'url')
# if present, u-url overrides source url
u_url = first_value(props, 'url')
if u_url:
self.entity.u_url = u_url
# generate content
content = props['content'][0] # find_mention_item() guaranteed this is here
text = (content.get('html') or content.get('value')).strip()
source_url = self.entity.source_url()
text += ' <br /> <a href="%s">via %s</a>' % (
source_url, util.domain_from_link(source_url))
# write comment
try:
self.entity.published = self.source.create_comment(
self.target_url, author_name, author_url, text)
except Exception as e:
code, body = util.interpret_http_exception(e)
msg = 'Error: %s %s; %s' % (code, e, body)
if code == '401':
logging.warning('Disabling source due to: %s' % e, exc_info=True)
self.source.status = 'disabled'
self.source.put()
return self.error(msg, status=code, mail=self.source.is_beta_user())
elif code == '404':
# post is gone
return self.error(msg, status=code, mail=False)
elif util.is_connection_failure(e) or (code and int(code) // 100 == 5):
return self.error(msg, status=util.ERROR_HTTP_RETURN_CODE, mail=False)
elif code or body:
return self.error(msg, status=code, mail=True)
else:
raise
# write results to datastore
self.entity.status = 'complete'
self.entity.put()
self.response.write(json.dumps(self.entity.published))
def poll(self, source):
"""Actually runs the poll.
Stores property names and values to update in source.updates.
"""
if source.last_activities_etag or source.last_activity_id:
logging.debug('Using ETag %s, last activity id %s',
source.last_activities_etag, source.last_activity_id)
#
# Step 1: fetch activities:
# * posts by the user
# * search all posts for the user's domain URLs to find links
#
cache = util.CacheDict()
if source.last_activities_cache_json:
cache.update(json.loads(source.last_activities_cache_json))
# search for links first so that the user's activities and responses
# override them if they overlap
links = source.search_for_links()
# this user's own activities (and user mentions)
resp = source.get_activities_response(
fetch_replies=True, fetch_likes=True, fetch_shares=True,
fetch_mentions=True, count=50, etag=source.last_activities_etag,
min_id=source.last_activity_id, cache=cache)
etag = resp.get('etag') # used later
user_activities = resp.get('items', [])
# these map ids to AS objects
responses = {a['id']: a for a in links}
activities = {a['id']: a for a in links + user_activities}
# extract silo activity ids, update last_activity_id
silo_activity_ids = set()
last_activity_id = source.last_activity_id
for id, activity in activities.items():
# maybe replace stored last activity id
parsed = util.parse_tag_uri(id)
if parsed:
id = parsed[1]
silo_activity_ids.add(id)
try:
# try numeric comparison first
greater = int(id) > int(last_activity_id)
except (TypeError, ValueError):
greater = id > last_activity_id
if greater:
last_activity_id = id
if last_activity_id and last_activity_id != source.last_activity_id:
source.updates['last_activity_id'] = last_activity_id
# trim cache to just the returned activity ids, so that it doesn't grow
# without bound. (WARNING: depends on get_activities_response()'s cache key
# format, e.g. 'PREFIX ACTIVITY_ID'!)
source.updates['last_activities_cache_json'] = json.dumps(
{k: v for k, v in cache.items() if k.split()[-1] in silo_activity_ids})
self.backfeed(source, responses, activities=activities)
source.updates.update({'last_polled': source.last_poll_attempt,
'poll_status': 'ok'})
if etag and etag != source.last_activities_etag:
source.updates['last_activities_etag'] = etag
#
# Possibly refetch updated syndication urls.
#
# if the author has added syndication urls since the first time
# original_post_discovery ran, we'll miss them. this cleanup task will
# periodically check for updated urls. only kicks in if the author has
# *ever* published a rel=syndication url
if source.should_refetch():
logging.info('refetching h-feed for source %s', source.label())
relationships = original_post_discovery.refetch(source)
now = util.now_fn()
source.updates['last_hfeed_refetch'] = now
if relationships:
logging.info('refetch h-feed found new rel=syndication relationships: %s',
relationships)
try:
self.repropagate_old_responses(source, relationships)
except BaseException, e:
if (isinstance(e, (datastore_errors.BadRequestError,
datastore_errors.Timeout)) or
util.is_connection_failure(e)):
logging.info('Timeout while repropagating responses.', exc_info=True)
else:
raise
def dispatch_request(self, site):
logger.info(f'Params: {list(request.values.items())}')
# strip fragments from source and target url
self.source_url = urllib.parse.urldefrag(request.form['source'])[0]
self.target_url = urllib.parse.urldefrag(request.form['target'])[0]
# follow target url through any redirects, strip utm_* query params
resp = util.follow_redirects(self.target_url)
redirected_target_urls = [r.url for r in resp.history]
self.target_url = util.clean_url(resp.url)
# parse and validate target URL
domain = util.domain_from_link(self.target_url)
if not domain:
self.error(f'Could not parse target URL {self.target_url}')
# look up source by domain
source_cls = models.sources[site]
domain = domain.lower()
self.source = (source_cls.query()
.filter(source_cls.domains == domain)
.filter(source_cls.features == 'webmention')
.filter(source_cls.status == 'enabled')
.get())
if not self.source:
# check for a rel-canonical link. Blogger uses these when it serves a post
# from multiple domains, e.g country TLDs like epeus.blogspot.co.uk vs
# epeus.blogspot.com.
# https://github.com/snarfed/bridgy/issues/805
mf2 = self.fetch_mf2(self.target_url, require_mf2=False)
if not mf2:
# fetch_mf2() already wrote the error response
return
domains = util.dedupe_urls(
util.domain_from_link(url)
for url in mf2[1]['rels'].get('canonical', []))
if domains:
self.source = (source_cls.query()
.filter(source_cls.domains.IN(domains))
.filter(source_cls.features == 'webmention')
.filter(source_cls.status == 'enabled')
.get())
if not self.source:
self.error(
f'Could not find {source_cls.GR_CLASS.NAME} account for {domain}. Is it registered with Bridgy?')
# check that the target URL path is supported
target_path = urllib.parse.urlparse(self.target_url).path
if target_path in ('', '/'):
msg = 'Home page webmentions are not currently supported.'
logger.info(msg)
return {'error': msg}, 202
for pattern in self.source.PATH_BLOCKLIST:
if pattern.match(target_path):
msg = f'{self.source.GR_CLASS.NAME} webmentions are not supported for URL path: {target_path}'
logger.info(msg)
return {'error': msg}, 202
# create BlogWebmention entity
id = f'{self.source_url} {self.target_url}'
self.entity = BlogWebmention.get_or_insert(
id, source=self.source.key, redirected_target_urls=redirected_target_urls)
if self.entity.status == 'complete':
# TODO: response message saying update isn't supported
return self.entity.published
logger.debug(f'BlogWebmention entity: {self.entity.key.urlsafe().decode()}')
# fetch source page
fetched = self.fetch_mf2(self.source_url)
if not fetched:
return
resp, mf2 = fetched
item = self.find_mention_item(mf2.get('items', []))
if not item:
self.error(f'Could not find target URL {self.target_url} in source page {resp.url}', data=mf2, log_exception=False)
# default author to target domain
author_name = domain
author_url = f'http://{domain}/'
# extract author name and URL from h-card, if any
props = item['properties']
author = get_first(props, 'author')
if author:
if isinstance(author, str):
author_name = author
else:
author_props = author.get('properties', {})
author_name = get_first(author_props, 'name')
author_url = get_first(author_props, 'url')
# if present, u-url overrides source url
u_url = get_first(props, 'url')
if u_url:
self.entity.u_url = u_url
# generate content
content = props['content'][0] # find_mention_item() guaranteed this is here
text = (content.get('html') or content.get('value')).strip()
source_url = self.entity.source_url()
text += f' <br /> <a href="{source_url}">via {util.domain_from_link(source_url)}</a>'
# write comment
try:
self.entity.published = self.source.create_comment(
self.target_url, author_name, author_url, text)
except Exception as e:
code, body = util.interpret_http_exception(e)
msg = f'Error: {code}: {e}; {body}'
if code == '401':
logger.warning(f'Disabling source due to: {e}', exc_info=True)
self.source.status = 'disabled'
self.source.put()
self.error(msg, status=code, report=self.source.is_beta_user())
elif code == '404':
# post is gone
self.error(msg, status=code, report=False)
elif util.is_connection_failure(e) or (code and int(code) // 100 == 5):
self.error(msg, status=502, report=False)
elif code or body:
self.error(msg, status=code, report=True)
else:
raise
# write results to datastore
self.entity.status = 'complete'
self.entity.put()
return self.entity.published
