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Factor wrap_request_handler_with_logging out of wrap_request_handler
... so that it can be used on non-JSON endpoints
This commit is contained in:
Richard van der Hoff
parent
9589a1925e
commit
09f570b935
1 changed files with 65 additions and 53 deletions
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@ -50,9 +50,10 @@ def request_handler():
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return wrap_request_handler
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def wrap_request_handler(request_handler):
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"""Wraps a request handler method with the necessary logging and exception
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handling.
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def wrap_request_handler(h):
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"""Wraps a request handler method with exception handling.
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Also adds logging as per wrap_request_handler_with_logging.
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The handler method must have a signature of "handle_foo(self, request)",
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where "self" must have "version_string" and "clock" attributes (and
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@ -62,12 +63,63 @@ def wrap_request_handler(request_handler):
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a response has been sent. If the deferred fails with a SynapseError we use
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it to send a JSON response with the appropriate HTTP reponse code. If the
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deferred fails with any other type of error we send a 500 reponse.
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"""
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@defer.inlineCallbacks
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def wrapped_request_handler(self, request):
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try:
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yield h(self, request)
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except CodeMessageException as e:
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code = e.code
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if isinstance(e, SynapseError):
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logger.info(
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"%s SynapseError: %s - %s", request, code, e.msg
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)
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else:
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logger.exception(e)
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respond_with_json(
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request, code, cs_exception(e), send_cors=True,
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pretty_print=_request_user_agent_is_curl(request),
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version_string=self.version_string,
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)
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except Exception:
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# failure.Failure() fishes the original Failure out
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# of our stack, and thus gives us a sensible stack
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# trace.
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f = failure.Failure()
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logger.error(
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"Failed handle request via %r: %r: %s",
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h,
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request,
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f.getTraceback().rstrip(),
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)
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respond_with_json(
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request,
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500,
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{
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"error": "Internal server error",
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"errcode": Codes.UNKNOWN,
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},
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send_cors=True,
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pretty_print=_request_user_agent_is_curl(request),
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version_string=self.version_string,
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)
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return wrap_request_handler_with_logging(wrapped_request_handler)
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def wrap_request_handler_with_logging(h):
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"""Wraps a request handler to provide logging and metrics
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The handler method must have a signature of "handle_foo(self, request)",
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where "self" must have a "clock" attribute (and "request" must be a
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SynapseRequest).
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As well as calling `request.processing` (which will log the response and
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duration for this request), the wrapped request handler will insert the
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request id into the logging context.
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"""
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@defer.inlineCallbacks
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def wrapped_request_handler(self, request):
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"""
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@ -86,56 +138,16 @@ def wrap_request_handler(request_handler):
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# will update it once it picks a servlet.
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servlet_name = self.__class__.__name__
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with request.processing(servlet_name):
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try:
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with PreserveLoggingContext(request_context):
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d = request_handler(self, request)
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# record the arrival of the request *after*
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# dispatching to the handler, so that the handler
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# can update the servlet name in the request
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# metrics
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requests_counter.inc(request.method,
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request.request_metrics.name)
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yield d
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except CodeMessageException as e:
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code = e.code
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if isinstance(e, SynapseError):
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logger.info(
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"%s SynapseError: %s - %s", request, code, e.msg
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)
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else:
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logger.exception(e)
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respond_with_json(
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request, code, cs_exception(e), send_cors=True,
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pretty_print=_request_user_agent_is_curl(request),
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version_string=self.version_string,
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)
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except Exception:
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# failure.Failure() fishes the original Failure out
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# of our stack, and thus gives us a sensible stack
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# trace.
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f = failure.Failure()
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logger.error(
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"Failed handle request %s.%s on %r: %r: %s",
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request_handler.__module__,
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request_handler.__name__,
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self,
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request,
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f.getTraceback().rstrip(),
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)
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respond_with_json(
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request,
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500,
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{
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"error": "Internal server error",
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"errcode": Codes.UNKNOWN,
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},
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send_cors=True,
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pretty_print=_request_user_agent_is_curl(request),
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version_string=self.version_string,
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)
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with PreserveLoggingContext(request_context):
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d = h(self, request)
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# record the arrival of the request *after*
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# dispatching to the handler, so that the handler
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# can update the servlet name in the request
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# metrics
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requests_counter.inc(request.method,
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request.request_metrics.name)
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yield d
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return wrapped_request_handler
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