diff options
| -rw-r--r-- | slixmpp/xmlstream/xmlstream.py | 41 |
1 files changed, 35 insertions, 6 deletions
diff --git a/slixmpp/xmlstream/xmlstream.py b/slixmpp/xmlstream/xmlstream.py index 04d16c6b..7909318d 100644 --- a/slixmpp/xmlstream/xmlstream.py +++ b/slixmpp/xmlstream/xmlstream.py @@ -21,7 +21,7 @@ import ssl import weakref import uuid -from asyncio import iscoroutinefunction +from asyncio import iscoroutinefunction, wait import xml.etree.ElementTree as ET @@ -896,6 +896,31 @@ class XMLStream(asyncio.BaseProtocol): """ return xml + async def continue_slow_send(self, task, already_used): + log.debug('rescheduled task: %s', task) + data = await task + log.debug('data for rescheduled task %s : %s', task, data) + for filter in self.__filters['out']: + if filter in already_used: + continue + if iscoroutinefunction(filter): + data = await task + else: + data = filter(data) + if data is None: + return + + if isinstance(data, ElementBase): + for filter in self.__filters['out_sync']: + data = filter(data) + if data is None: + return + str_data = tostring(data.xml, xmlns=self.default_ns, + stream=self, top_level=True) + self.send_raw(str_data) + else: + self.send_raw(data) + async def run_filters(self): """ Background loop that processes stanzas to send. @@ -905,9 +930,16 @@ class XMLStream(asyncio.BaseProtocol): try: if isinstance(data, ElementBase): if use_filters: + already_run_filters = set() for filter in self.__filters['out']: + already_run_filters.add(filter) if iscoroutinefunction(filter): - data = await filter(data) + task = asyncio.create_task(filter(data)) + completed, pending = await wait({task}, timeout=1) + if pending: + asyncio.ensure_future(self.continue_slow_send(task, already_run_filters)) + raise Exception("Slow coro, rescheduling") + data = task.result() else: data = filter(data) if data is None: @@ -916,10 +948,7 @@ class XMLStream(asyncio.BaseProtocol): if isinstance(data, ElementBase): if use_filters: for filter in self.__filters['out_sync']: - if iscoroutinefunction(filter): - data = await filter(data) - else: - data = filter(data) + data = filter(data) if data is None: raise Exception('Empty stanza') str_data = tostring(data.xml, xmlns=self.default_ns, |