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Fix 'NoneType' object has no attribute 'writeHeaders'

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Avoid throwing a (harmless) exception when we try to write an error response to
an http request where the client has disconnected.

This comes up as a CRITICAL error in the logs which tends to mislead people
into thinking there's an actual problem
This commit is contained in:
Richard van der Hoff 2018-01-16 17:58:16 +00:00
parent febdca4b37
commit 936482d507
1 changed files with 9 additions and 9 deletions
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18
synapse/http/server.py
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@ -316,15 +316,6 @@ class JsonResource(HttpServer, resource.Resource):
def _send_response(self, request, code, response_json_object, def _send_response(self, request, code, response_json_object,
response_code_message=None): response_code_message=None):
# could alternatively use request.notifyFinish() and flip a flag when
# the Deferred fires, but since the flag is RIGHT THERE it seems like
# a waste.
if request._disconnected:
logger.warn(
"Not sending response to request %s, already disconnected.",
request)
return
outgoing_responses_counter.inc(request.method, str(code)) outgoing_responses_counter.inc(request.method, str(code))
# TODO: Only enable CORS for the requests that need it. # TODO: Only enable CORS for the requests that need it.
@ -400,6 +391,15 @@ class RootRedirect(resource.Resource):
def respond_with_json(request, code, json_object, send_cors=False, def respond_with_json(request, code, json_object, send_cors=False,
response_code_message=None, pretty_print=False, response_code_message=None, pretty_print=False,
version_string="", canonical_json=True): version_string="", canonical_json=True):
# could alternatively use request.notifyFinish() and flip a flag when
# the Deferred fires, but since the flag is RIGHT THERE it seems like
# a waste.
if request._disconnected:
logger.warn(
"Not sending response to request %s, already disconnected.",
request)
return
if pretty_print: if pretty_print:
json_bytes = encode_pretty_printed_json(json_object) + "\n" json_bytes = encode_pretty_printed_json(json_object) + "\n"
else: else: