From 3502480384bd7d9f4e4eb1a3b92e8df08f4e487c Mon Sep 17 00:00:00 2001
From: Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
Date: Sun, 1 Jul 2018 18:46:33 +0200
Subject: Switch from @asyncio.coroutine to async def everywhere.

---
 slixmpp/clientxmpp.py                           |  5 ++---
 slixmpp/features/feature_bind/bind.py           |  5 ++---
 slixmpp/features/feature_session/session.py     |  5 ++---
 slixmpp/plugins/xep_0047/stream.py              | 15 +++++--------
 slixmpp/plugins/xep_0065/proxy.py               | 29 +++++++++++--------------
 slixmpp/plugins/xep_0065/socks5.py              |  4 ++--
 slixmpp/plugins/xep_0115/caps.py                | 10 ++++-----
 slixmpp/plugins/xep_0153/vcard_avatar.py        |  5 ++---
 slixmpp/plugins/xep_0198/stream_management.py   |  7 +++---
 slixmpp/plugins/xep_0199/ping.py                | 10 ++++-----
 slixmpp/xmlstream/handler/coroutine_callback.py |  5 ++---
 slixmpp/xmlstream/handler/waiter.py             |  5 ++---
 slixmpp/xmlstream/resolver.py                   | 26 ++++++++++------------
 slixmpp/xmlstream/xmlstream.py                  | 29 ++++++++++---------------
 14 files changed, 67 insertions(+), 93 deletions(-)

diff --git a/slixmpp/clientxmpp.py b/slixmpp/clientxmpp.py
index 891a9fb6..1bbf5216 100644
--- a/slixmpp/clientxmpp.py
+++ b/slixmpp/clientxmpp.py
@@ -265,8 +265,7 @@ class ClientXMPP(BaseXMPP):
         self.bindfail = False
         self.features = set()
 
-    @asyncio.coroutine
-    def _handle_stream_features(self, features):
+    async def _handle_stream_features(self, features):
         """Process the received stream features.
 
         :param features: The features stanza.
@@ -275,7 +274,7 @@ class ClientXMPP(BaseXMPP):
             if name in features['features']:
                 handler, restart = self._stream_feature_handlers[name]
                 if asyncio.iscoroutinefunction(handler):
-                    result = yield from handler(features)
+                    result = await handler(features)
                 else:
                     result = handler(features)
                 if result and restart:
diff --git a/slixmpp/features/feature_bind/bind.py b/slixmpp/features/feature_bind/bind.py
index e837ee0a..bd2a3b99 100644
--- a/slixmpp/features/feature_bind/bind.py
+++ b/slixmpp/features/feature_bind/bind.py
@@ -35,8 +35,7 @@ class FeatureBind(BasePlugin):
         register_stanza_plugin(Iq, stanza.Bind)
         register_stanza_plugin(StreamFeatures, stanza.Bind)
 
-    @asyncio.coroutine
-    def _handle_bind_resource(self, features):
+    async def _handle_bind_resource(self, features):
         """
         Handle requesting a specific resource.
 
@@ -51,7 +50,7 @@ class FeatureBind(BasePlugin):
         if self.xmpp.requested_jid.resource:
             iq['bind']['resource'] = self.xmpp.requested_jid.resource
 
-        yield from iq.send(callback=self._on_bind_response)
+        await iq.send(callback=self._on_bind_response)
 
     def _on_bind_response(self, response):
         self.xmpp.boundjid = JID(response['bind']['jid'])
diff --git a/slixmpp/features/feature_session/session.py b/slixmpp/features/feature_session/session.py
index e0e69e87..643c34ef 100644
--- a/slixmpp/features/feature_session/session.py
+++ b/slixmpp/features/feature_session/session.py
@@ -35,8 +35,7 @@ class FeatureSession(BasePlugin):
         register_stanza_plugin(Iq, stanza.Session)
         register_stanza_plugin(StreamFeatures, stanza.Session)
 
-    @asyncio.coroutine
-    def _handle_start_session(self, features):
+    async def _handle_start_session(self, features):
         """
         Handle the start of the session.
 
@@ -51,7 +50,7 @@ class FeatureSession(BasePlugin):
         iq = self.xmpp.Iq()
         iq['type'] = 'set'
         iq.enable('session')
-        yield from iq.send(callback=self._on_start_session_response)
+        await iq.send(callback=self._on_start_session_response)
 
     def _on_start_session_response(self, response):
         self.xmpp.features.add('session')
diff --git a/slixmpp/plugins/xep_0047/stream.py b/slixmpp/plugins/xep_0047/stream.py
index 3be894eb..b3767265 100644
--- a/slixmpp/plugins/xep_0047/stream.py
+++ b/slixmpp/plugins/xep_0047/stream.py
@@ -31,8 +31,7 @@ class IBBytestream(object):
 
         self.recv_queue = asyncio.Queue()
 
-    @asyncio.coroutine
-    def send(self, data, timeout=None):
+    async def send(self, data, timeout=None):
         if not self.stream_started or self.stream_out_closed:
             raise socket.error
         if len(data) > self.block_size:
@@ -56,22 +55,20 @@ class IBBytestream(object):
             iq['ibb_data']['sid'] = self.sid
             iq['ibb_data']['seq'] = seq
             iq['ibb_data']['data'] = data
-            yield from iq.send(timeout=timeout)
+            await iq.send(timeout=timeout)
         return len(data)
 
-    @asyncio.coroutine
-    def sendall(self, data, timeout=None):
+    async def sendall(self, data, timeout=None):
         sent_len = 0
         while sent_len < len(data):
-            sent_len += yield from self.send(data[sent_len:self.block_size], timeout=timeout)
+            sent_len += await self.send(data[sent_len:self.block_size], timeout=timeout)
 
-    @asyncio.coroutine
-    def sendfile(self, file, timeout=None):
+    async def sendfile(self, file, timeout=None):
         while True:
             data = file.read(self.block_size)
             if not data:
                 break
-            yield from self.send(data, timeout=timeout)
+            await self.send(data, timeout=timeout)
 
     def _recv_data(self, stanza):
         new_seq = stanza['ibb_data']['seq']
diff --git a/slixmpp/plugins/xep_0065/proxy.py b/slixmpp/plugins/xep_0065/proxy.py
index a4be2717..e1ca4096 100644
--- a/slixmpp/plugins/xep_0065/proxy.py
+++ b/slixmpp/plugins/xep_0065/proxy.py
@@ -55,18 +55,17 @@ class XEP_0065(BasePlugin):
         """Returns the socket associated to the SID."""
         return self._sessions.get(sid, None)
 
-    @asyncio.coroutine
-    def handshake(self, to, ifrom=None, sid=None, timeout=None):
+    async def handshake(self, to, ifrom=None, sid=None, timeout=None):
         """ Starts the handshake to establish the socks5 bytestreams
         connection.
         """
         if not self._proxies:
-            self._proxies = yield from self.discover_proxies()
+            self._proxies = await self.discover_proxies()
 
         if sid is None:
             sid = uuid4().hex
 
-        used = yield from self.request_stream(to, sid=sid, ifrom=ifrom, timeout=timeout)
+        used = await self.request_stream(to, sid=sid, ifrom=ifrom, timeout=timeout)
         proxy = used['socks']['streamhost_used']['jid']
 
         if proxy not in self._proxies:
@@ -74,16 +73,16 @@ class XEP_0065(BasePlugin):
             return
 
         try:
-            self._sessions[sid] = (yield from self._connect_proxy(
+            self._sessions[sid] = (await self._connect_proxy(
                     self._get_dest_sha1(sid, self.xmpp.boundjid, to),
                     self._proxies[proxy][0],
                     self._proxies[proxy][1]))[1]
         except socket.error:
             return None
-        addr, port = yield from self._sessions[sid].connected
+        addr, port = await self._sessions[sid].connected
 
         # Request that the proxy activate the session with the target.
-        yield from self.activate(proxy, sid, to, timeout=timeout)
+        await self.activate(proxy, sid, to, timeout=timeout)
         sock = self.get_socket(sid)
         self.xmpp.event('stream:%s:%s' % (sid, to), sock)
         return sock
@@ -105,8 +104,7 @@ class XEP_0065(BasePlugin):
             iq['socks'].add_streamhost(proxy, host, port)
         return iq.send(timeout=timeout, callback=callback)
 
-    @asyncio.coroutine
-    def discover_proxies(self, jid=None, ifrom=None, timeout=None):
+    async def discover_proxies(self, jid=None, ifrom=None, timeout=None):
         """Auto-discover the JIDs of SOCKS5 proxies on an XMPP server."""
         if jid is None:
             if self.xmpp.is_component:
@@ -116,7 +114,7 @@ class XEP_0065(BasePlugin):
 
         discovered = set()
 
-        disco_items = yield from self.xmpp['xep_0030'].get_items(jid, timeout=timeout)
+        disco_items = await self.xmpp['xep_0030'].get_items(jid, timeout=timeout)
         disco_items = {item[0] for item in disco_items['disco_items']['items']}
 
         disco_info_futures = {}
@@ -125,7 +123,7 @@ class XEP_0065(BasePlugin):
 
         for item in disco_items:
             try:
-                disco_info = yield from disco_info_futures[item]
+                disco_info = await disco_info_futures[item]
             except XMPPError:
                 continue
             else:
@@ -137,7 +135,7 @@ class XEP_0065(BasePlugin):
 
         for jid in discovered:
             try:
-                addr = yield from self.get_network_address(jid, ifrom=ifrom, timeout=timeout)
+                addr = await self.get_network_address(jid, ifrom=ifrom, timeout=timeout)
                 self._proxies[jid] = (addr['socks']['streamhost']['host'],
                                       addr['socks']['streamhost']['port'])
             except XMPPError:
@@ -182,9 +180,8 @@ class XEP_0065(BasePlugin):
                     streamhost['host'],
                     streamhost['port']))
 
-        @asyncio.coroutine
-        def gather(futures, iq, streamhosts):
-            proxies = yield from asyncio.gather(*futures, return_exceptions=True)
+        async def gather(futures, iq, streamhosts):
+            proxies = await asyncio.gather(*futures, return_exceptions=True)
             for streamhost, proxy in zip(streamhosts, proxies):
                 if isinstance(proxy, ValueError):
                     continue
@@ -194,7 +191,7 @@ class XEP_0065(BasePlugin):
                 proxy = proxy[1]
                 # TODO: what if the future never happens?
                 try:
-                    addr, port = yield from proxy.connected
+                    addr, port = await proxy.connected
                 except socket.error:
                     log.exception('Socket error while connecting to the proxy.')
                     continue
diff --git a/slixmpp/plugins/xep_0065/socks5.py b/slixmpp/plugins/xep_0065/socks5.py
index 54267b32..f390e313 100644
--- a/slixmpp/plugins/xep_0065/socks5.py
+++ b/slixmpp/plugins/xep_0065/socks5.py
@@ -137,8 +137,8 @@ class Socks5Protocol(asyncio.Protocol):
     def resume_writing(self):
         self.paused.set_result(None)
 
-    def write(self, data):
-        yield from self.paused
+    async def write(self, data):
+        await self.paused
         self.transport.write(data)
 
     def _send_methods(self):
diff --git a/slixmpp/plugins/xep_0115/caps.py b/slixmpp/plugins/xep_0115/caps.py
index 9b2d499e..749b74bd 100644
--- a/slixmpp/plugins/xep_0115/caps.py
+++ b/slixmpp/plugins/xep_0115/caps.py
@@ -137,8 +137,7 @@ class XEP_0115(BasePlugin):
 
         self.xmpp.event('entity_caps', p)
 
-    @asyncio.coroutine
-    def _process_caps(self, pres):
+    async def _process_caps(self, pres):
         if not pres['caps']['hash']:
             log.debug("Received unsupported legacy caps: %s, %s, %s",
                     pres['caps']['node'],
@@ -169,7 +168,7 @@ class XEP_0115(BasePlugin):
         log.debug("New caps verification string: %s", ver)
         try:
             node = '%s#%s' % (pres['caps']['node'], ver)
-            caps = yield from self.xmpp['xep_0030'].get_info(pres['from'], node,
+            caps = await self.xmpp['xep_0030'].get_info(pres['from'], node,
                                                              coroutine=True)
 
             if isinstance(caps, Iq):
@@ -285,10 +284,9 @@ class XEP_0115(BasePlugin):
         binary = hash(S.encode('utf8')).digest()
         return base64.b64encode(binary).decode('utf-8')
 
-    @asyncio.coroutine
-    def update_caps(self, jid=None, node=None, preserve=False):
+    async def update_caps(self, jid=None, node=None, preserve=False):
         try:
-            info = yield from self.xmpp['xep_0030'].get_info(jid, node, local=True)
+            info = await self.xmpp['xep_0030'].get_info(jid, node, local=True)
             if isinstance(info, Iq):
                 info = info['disco_info']
             ver = self.generate_verstring(info, self.hash)
diff --git a/slixmpp/plugins/xep_0153/vcard_avatar.py b/slixmpp/plugins/xep_0153/vcard_avatar.py
index bbbbd2ad..6430e8d6 100644
--- a/slixmpp/plugins/xep_0153/vcard_avatar.py
+++ b/slixmpp/plugins/xep_0153/vcard_avatar.py
@@ -98,10 +98,9 @@ class XEP_0153(BasePlugin):
         first_future.add_done_callback(propagate_timeout_exception)
         return future
 
-    @asyncio.coroutine
-    def _start(self, event):
+    async def _start(self, event):
         try:
-            vcard = yield from self.xmpp['xep_0054'].get_vcard(self.xmpp.boundjid.bare)
+            vcard = await self.xmpp['xep_0054'].get_vcard(self.xmpp.boundjid.bare)
             data = vcard['vcard_temp']['PHOTO']['BINVAL']
             if not data:
                 new_hash = ''
diff --git a/slixmpp/plugins/xep_0198/stream_management.py b/slixmpp/plugins/xep_0198/stream_management.py
index fbc9e023..759e82e1 100644
--- a/slixmpp/plugins/xep_0198/stream_management.py
+++ b/slixmpp/plugins/xep_0198/stream_management.py
@@ -174,8 +174,7 @@ class XEP_0198(BasePlugin):
         req = stanza.RequestAck(self.xmpp)
         self.xmpp.send_raw(str(req))
 
-    @asyncio.coroutine
-    def _handle_sm_feature(self, features):
+    async def _handle_sm_feature(self, features):
         """
         Enable or resume stream management.
 
@@ -203,7 +202,7 @@ class XEP_0198(BasePlugin):
                             MatchXPath(stanza.Enabled.tag_name()),
                             MatchXPath(stanza.Failed.tag_name())]))
                 self.xmpp.register_handler(waiter)
-                result = yield from waiter.wait()
+                result = await waiter.wait()
         elif self.sm_id and self.allow_resume and 'bind' not in self.xmpp.features:
             self.enabled = True
             resume = stanza.Resume(self.xmpp)
@@ -219,7 +218,7 @@ class XEP_0198(BasePlugin):
                         MatchXPath(stanza.Resumed.tag_name()),
                         MatchXPath(stanza.Failed.tag_name())]))
             self.xmpp.register_handler(waiter)
-            result = yield from waiter.wait()
+            result = await waiter.wait()
             if result is not None and result.name == 'resumed':
                 return True
         return False
diff --git a/slixmpp/plugins/xep_0199/ping.py b/slixmpp/plugins/xep_0199/ping.py
index 2ca71f7d..1153389b 100644
--- a/slixmpp/plugins/xep_0199/ping.py
+++ b/slixmpp/plugins/xep_0199/ping.py
@@ -104,11 +104,10 @@ class XEP_0199(BasePlugin):
     def disable_keepalive(self, event=None):
         self.xmpp.cancel_schedule('Ping keepalive')
 
-    @asyncio.coroutine
-    def _keepalive(self, event=None):
+    async def _keepalive(self, event=None):
         log.debug("Keepalive ping...")
         try:
-            rtt = yield from self.ping(self.xmpp.boundjid.host, timeout=self.timeout)
+            rtt = await self.ping(self.xmpp.boundjid.host, timeout=self.timeout)
         except IqTimeout:
             log.debug("Did not receive ping back in time." + \
                       "Requesting Reconnect.")
@@ -145,8 +144,7 @@ class XEP_0199(BasePlugin):
         return iq.send(timeout=timeout, callback=callback,
                        timeout_callback=timeout_callback)
 
-    @asyncio.coroutine
-    def ping(self, jid=None, ifrom=None, timeout=None):
+    async def ping(self, jid=None, ifrom=None, timeout=None):
         """Send a ping request and calculate RTT.
         This is a coroutine.
 
@@ -174,7 +172,7 @@ class XEP_0199(BasePlugin):
 
         log.debug('Pinging %s' % jid)
         try:
-            yield from self.send_ping(jid, ifrom=ifrom, timeout=timeout)
+            await self.send_ping(jid, ifrom=ifrom, timeout=timeout)
         except IqError as e:
             if own_host:
                 rtt = time.time() - start
diff --git a/slixmpp/xmlstream/handler/coroutine_callback.py b/slixmpp/xmlstream/handler/coroutine_callback.py
index 1ca4ab0a..0708a6e4 100644
--- a/slixmpp/xmlstream/handler/coroutine_callback.py
+++ b/slixmpp/xmlstream/handler/coroutine_callback.py
@@ -45,10 +45,9 @@ class CoroutineCallback(BaseHandler):
         if not asyncio.iscoroutinefunction(pointer):
             raise ValueError("Given function is not a coroutine")
 
-        @asyncio.coroutine
-        def pointer_wrapper(stanza, *args, **kwargs):
+        async def pointer_wrapper(stanza, *args, **kwargs):
             try:
-                yield from pointer(stanza, *args, **kwargs)
+                await pointer(stanza, *args, **kwargs)
             except Exception as e:
                 stanza.exception(e)
 
diff --git a/slixmpp/xmlstream/handler/waiter.py b/slixmpp/xmlstream/handler/waiter.py
index 8a4d74ea..b82fa5ca 100644
--- a/slixmpp/xmlstream/handler/waiter.py
+++ b/slixmpp/xmlstream/handler/waiter.py
@@ -50,8 +50,7 @@ class Waiter(BaseHandler):
         """Do not process this handler during the main event loop."""
         pass
 
-    @asyncio.coroutine
-    def wait(self, timeout=None):
+    async def wait(self, timeout=None):
         """Block an event handler while waiting for a stanza to arrive.
 
         Be aware that this will impact performance if called from a
@@ -70,7 +69,7 @@ class Waiter(BaseHandler):
 
         stanza = None
         try:
-            stanza = yield from self._payload.get()
+            stanza = await self._payload.get()
         except TimeoutError:
             log.warning("Timed out waiting for %s", self.name)
         self.stream().remove_handler(self.name)
diff --git a/slixmpp/xmlstream/resolver.py b/slixmpp/xmlstream/resolver.py
index 23f7f039..3c3c9dda 100644
--- a/slixmpp/xmlstream/resolver.py
+++ b/slixmpp/xmlstream/resolver.py
@@ -45,8 +45,7 @@ def default_resolver(loop):
     return None
 
 
-@asyncio.coroutine
-def resolve(host, port=None, service=None, proto='tcp',
+async def resolve(host, port=None, service=None, proto='tcp',
             resolver=None, use_ipv6=True, use_aiodns=True, loop=None):
     """Peform DNS resolution for a given hostname.
 
@@ -127,7 +126,7 @@ def resolve(host, port=None, service=None, proto='tcp',
     if not service:
         hosts = [(host, port)]
     else:
-        hosts = yield from get_SRV(host, port, service, proto,
+        hosts = await get_SRV(host, port, service, proto,
                                    resolver=resolver,
                                    use_aiodns=use_aiodns)
         if not hosts:
@@ -141,19 +140,18 @@ def resolve(host, port=None, service=None, proto='tcp',
             results.append((host, '127.0.0.1', port))
 
         if use_ipv6:
-            aaaa = yield from get_AAAA(host, resolver=resolver,
+            aaaa = await get_AAAA(host, resolver=resolver,
                                        use_aiodns=use_aiodns, loop=loop)
             for address in aaaa:
                 results.append((host, address, port))
 
-        a = yield from get_A(host, resolver=resolver,
+        a = await get_A(host, resolver=resolver,
                              use_aiodns=use_aiodns, loop=loop)
         for address in a:
             results.append((host, address, port))
 
     return results
 
-@asyncio.coroutine
 def get_A(host, resolver=None, use_aiodns=True, loop=None):
     """Lookup DNS A records for a given host.
 
@@ -178,7 +176,7 @@ def get_A(host, resolver=None, use_aiodns=True, loop=None):
     # getaddrinfo() method.
     if resolver is None or not use_aiodns:
         try:
-            recs = yield from loop.getaddrinfo(host, None,
+            recs = await loop.getaddrinfo(host, None,
                                                family=socket.AF_INET,
                                                type=socket.SOCK_STREAM)
             return [rec[4][0] for rec in recs]
@@ -189,15 +187,14 @@ def get_A(host, resolver=None, use_aiodns=True, loop=None):
     # Using aiodns:
     future = resolver.query(host, 'A')
     try:
-        recs = yield from future
+        recs = await future
     except Exception as e:
         log.debug('DNS: Exception while querying for %s A records: %s', host, e)
         recs = []
     return [rec.host for rec in recs]
 
 
-@asyncio.coroutine
-def get_AAAA(host, resolver=None, use_aiodns=True, loop=None):
+async def get_AAAA(host, resolver=None, use_aiodns=True, loop=None):
     """Lookup DNS AAAA records for a given host.
 
     If ``resolver`` is not provided, or is ``None``, then resolution will
@@ -224,7 +221,7 @@ def get_AAAA(host, resolver=None, use_aiodns=True, loop=None):
             log.debug("DNS: Unable to query %s for AAAA records: IPv6 is not supported", host)
             return []
         try:
-            recs = yield from loop.getaddrinfo(host, None,
+            recs = await loop.getaddrinfo(host, None,
                                                family=socket.AF_INET6,
                                                type=socket.SOCK_STREAM)
             return [rec[4][0] for rec in recs]
@@ -236,14 +233,13 @@ def get_AAAA(host, resolver=None, use_aiodns=True, loop=None):
     # Using aiodns:
     future = resolver.query(host, 'AAAA')
     try:
-        recs = yield from future
+        recs = await future
     except Exception as e:
         log.debug('DNS: Exception while querying for %s AAAA records: %s', host, e)
         recs = []
     return [rec.host for rec in recs]
 
-@asyncio.coroutine
-def get_SRV(host, port, service, proto='tcp', resolver=None, use_aiodns=True):
+async def get_SRV(host, port, service, proto='tcp', resolver=None, use_aiodns=True):
     """Perform SRV record resolution for a given host.
 
     .. note::
@@ -277,7 +273,7 @@ def get_SRV(host, port, service, proto='tcp', resolver=None, use_aiodns=True):
     try:
         future = resolver.query('_%s._%s.%s' % (service, proto, host),
                                 'SRV')
-        recs = yield from future
+        recs = await future
     except Exception as e:
         log.debug('DNS: Exception while querying for %s SRV records: %s', host, e)
         return []
diff --git a/slixmpp/xmlstream/xmlstream.py b/slixmpp/xmlstream/xmlstream.py
index 93652815..d5dce586 100644
--- a/slixmpp/xmlstream/xmlstream.py
+++ b/slixmpp/xmlstream/xmlstream.py
@@ -287,11 +287,10 @@ class XMLStream(asyncio.BaseProtocol):
         self.event("connecting")
         self._current_connection_attempt = asyncio.ensure_future(self._connect_routine())
 
-    @asyncio.coroutine
-    def _connect_routine(self):
+    async def _connect_routine(self):
         self.event_when_connected = "connected"
 
-        record = yield from self.pick_dns_answer(self.default_domain)
+        record = await self.pick_dns_answer(self.default_domain)
         if record is not None:
             host, address, dns_port = record
             port = dns_port if dns_port else self.address[1]
@@ -307,9 +306,9 @@ class XMLStream(asyncio.BaseProtocol):
         else:
             ssl_context = None
 
-        yield from asyncio.sleep(self.connect_loop_wait)
+        await asyncio.sleep(self.connect_loop_wait)
         try:
-            yield from self.loop.create_connection(lambda: self,
+            await self.loop.create_connection(lambda: self,
                                                    self.address[0],
                                                    self.address[1],
                                                    ssl=ssl_context,
@@ -540,10 +539,9 @@ class XMLStream(asyncio.BaseProtocol):
         ssl_connect_routine = self.loop.create_connection(lambda: self, ssl=ssl_context,
                                                           sock=self.socket,
                                                           server_hostname=self.default_domain)
-        @asyncio.coroutine
-        def ssl_coro():
+        async def ssl_coro():
             try:
-                transp, prot = yield from ssl_connect_routine
+                transp, prot = await ssl_connect_routine
             except ssl.SSLError as e:
                 log.debug('SSL: Unable to connect', exc_info=True)
                 log.error('CERT: Invalid certificate trust chain.')
@@ -671,8 +669,7 @@ class XMLStream(asyncio.BaseProtocol):
             idx += 1
         return False
 
-    @asyncio.coroutine
-    def get_dns_records(self, domain, port=None):
+    async def get_dns_records(self, domain, port=None):
         """Get the DNS records for a domain.
 
         :param domain: The domain in question.
@@ -684,7 +681,7 @@ class XMLStream(asyncio.BaseProtocol):
         resolver = default_resolver(loop=self.loop)
         self.configure_dns(resolver, domain=domain, port=port)
 
-        result = yield from resolve(domain, port,
+        result = await resolve(domain, port,
                                     service=self.dns_service,
                                     resolver=resolver,
                                     use_ipv6=self.use_ipv6,
@@ -692,8 +689,7 @@ class XMLStream(asyncio.BaseProtocol):
                                     loop=self.loop)
         return result
 
-    @asyncio.coroutine
-    def pick_dns_answer(self, domain, port=None):
+    async def pick_dns_answer(self, domain, port=None):
         """Pick a server and port from DNS answers.
 
         Gets DNS answers if none available.
@@ -703,7 +699,7 @@ class XMLStream(asyncio.BaseProtocol):
         :param port: If the results don't include a port, use this one.
         """
         if self.dns_answers is None:
-            dns_records = yield from self.get_dns_records(domain, port)
+            dns_records = await self.get_dns_records(domain, port)
             self.dns_answers = iter(dns_records)
 
         try:
@@ -768,10 +764,9 @@ class XMLStream(asyncio.BaseProtocol):
             # If the callback is a coroutine, schedule it instead of
             # running it directly
             if asyncio.iscoroutinefunction(handler_callback):
-                @asyncio.coroutine
-                def handler_callback_routine(cb):
+                async def handler_callback_routine(cb):
                     try:
-                        yield from cb(data)
+                        await cb(data)
                     except Exception as e:
                         if old_exception:
                             old_exception(e)
-- 
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