fixing uncaught async exceptions due to missing await

fixes uncaught exceptions in the event loop.
passing timeout and timeout_callback through.

examples/http_upload.py

@@ -34,7 +34,10 @@ class HttpUpload(slixmpp.ClientXMPP):
 
     async def start(self, event):
         log.info('Uploading file %s...', self.filename)
-        url = await self['xep_0363'].upload_file(self.filename)
+        def timeout_callback(arg):
+            raise TimeoutError("could not send message in time")
+        url = await self['xep_0363'].upload_file(
+            self.filename, timeout=10, timeout_callback=timeout_callback)
         log.info('Upload success!')
 
         log.info('Sending file to %s', self.recipient)

slixmpp/plugins/xep_0363/http_upload.py

@@ -6,7 +6,6 @@
     See the file LICENSE for copying permission.
 """
 
-import asyncio
 import logging
 import os.path
 
@@ -68,8 +67,9 @@ class XEP_0363(BasePlugin):
     def _handle_request(self, iq):
         self.xmpp.event('http_upload_request', iq)
 
-    async def find_upload_service(self, timeout=None):
-        results = await self.xmpp['xep_0030'].get_info_from_domain()
+    async def find_upload_service(self, timeout=None, timeout_callback=None):
+        results = await self.xmpp['xep_0030'].get_info_from_domain(
+            timeout=timeout, timeout_callback=timeout_callback)
 
         for info in results:
             for identity in info['disco_info']['identities']:
@@ -94,7 +94,8 @@ class XEP_0363(BasePlugin):
                           callback=None, timeout_callback=None):
         ''' Helper function which does all of the uploading process. '''
         if self.upload_service is None:
-            info_iq = await self.find_upload_service(timeout=timeout)
+            info_iq = await self.find_upload_service(
+                timeout=timeout, timeout_callback=timeout_callback)
             if info_iq is None:
                 raise UploadServiceNotFound()
             self.upload_service = info_iq['from']