diff options
| -rw-r--r-- | synapse/http/server.py | 114 | ||||
| -rw-r--r-- | synapse/metrics/__init__.py | 16 |
2 files changed, 96 insertions, 34 deletions
diff --git a/synapse/http/server.py b/synapse/http/server.py index 165c684d0d..4b567215c8 100644 --- a/synapse/http/server.py +++ b/synapse/http/server.py @@ -1,5 +1,6 @@ # -*- coding: utf-8 -*- # Copyright 2014-2016 OpenMarket Ltd +# Copyright 2018 New Vector Ltd # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. @@ -59,6 +60,11 @@ response_count = metrics.register_counter( ) ) +requests_counter = metrics.register_counter( + "requests_received", + labels=["method", "servlet", ], +) + outgoing_responses_counter = metrics.register_counter( "responses", labels=["method", "code"], @@ -145,7 +151,8 @@ def wrap_request_handler(request_handler, include_metrics=False): # at the servlet name. For most requests that name will be # JsonResource (or a subclass), and JsonResource._async_render # will update it once it picks a servlet. - request_metrics.start(self.clock, name=self.__class__.__name__) + servlet_name = self.__class__.__name__ + request_metrics.start(self.clock, name=servlet_name) request_context.request = request_id with request.processing(): @@ -154,6 +161,7 @@ def wrap_request_handler(request_handler, include_metrics=False): if include_metrics: yield request_handler(self, request, request_metrics) else: + requests_counter.inc(request.method, servlet_name) yield request_handler(self, request) except CodeMessageException as e: code = e.code @@ -229,7 +237,7 @@ class JsonResource(HttpServer, resource.Resource): """ This implements the HttpServer interface and provides JSON support for Resources. - Register callbacks via register_path() + Register callbacks via register_paths() Callbacks can return a tuple of status code and a dict in which case the the dict will automatically be sent to the client as a JSON object. @@ -276,49 +284,59 @@ class JsonResource(HttpServer, resource.Resource): This checks if anyone has registered a callback for that method and path. """ - if request.method == "OPTIONS": - self._send_response(request, 200, {}) - return + callback, group_dict = self._get_handler_for_request(request) - # Loop through all the registered callbacks to check if the method - # and path regex match - for path_entry in self.path_regexs.get(request.method, []): - m = path_entry.pattern.match(request.path) - if not m: - continue + servlet_instance = getattr(callback, "__self__", None) + if servlet_instance is not None: + servlet_classname = servlet_instance.__class__.__name__ + else: + servlet_classname = "%r" % callback - # We found a match! First update the metrics object to indicate - # which servlet is handling the request. + request_metrics.name = servlet_classname + requests_counter.inc(request.method, servlet_classname) - callback = path_entry.callback + # Now trigger the callback. If it returns a response, we send it + # here. If it throws an exception, that is handled by the wrapper + # installed by @request_handler. - servlet_instance = getattr(callback, "__self__", None) - if servlet_instance is not None: - servlet_classname = servlet_instance.__class__.__name__ - else: - servlet_classname = "%r" % callback + kwargs = intern_dict({ + name: urllib.unquote(value).decode("UTF-8") if value else value + for name, value in group_dict.items() + }) - request_metrics.name = servlet_classname + callback_return = yield callback(request, **kwargs) + if callback_return is not None: + code, response = callback_return + self._send_response(request, code, response) - # Now trigger the callback. If it returns a response, we send it - # here. If it throws an exception, that is handled by the wrapper - # installed by @request_handler. + def _get_handler_for_request(self, request): + """Finds a callback method to handle the given request - kwargs = intern_dict({ - name: urllib.unquote(value).decode("UTF-8") if value else value - for name, value in m.groupdict().items() - }) + Args: + request (twisted.web.http.Request): + + Returns: + Tuple[Callable, dict[str, str]]: callback method, and the dict + mapping keys to path components as specified in the handler's + path match regexp. - callback_return = yield callback(request, **kwargs) - if callback_return is not None: - code, response = callback_return - self._send_response(request, code, response) + The callback will normally be a method registered via + register_paths, so will return (possibly via Deferred) either + None, or a tuple of (http code, response body). + """ + if request.method == "OPTIONS": + return _options_handler, {} - return + # Loop through all the registered callbacks to check if the method + # and path regex match + for path_entry in self.path_regexs.get(request.method, []): + m = path_entry.pattern.match(request.path) + if m: + # We found a match! + return path_entry.callback, m.groupdict() # Huh. No one wanted to handle that? Fiiiiiine. Send 400. - request_metrics.name = self.__class__.__name__ + ".UnrecognizedRequest" - raise UnrecognizedRequestError() + return _unrecognised_request_handler, {} def _send_response(self, request, code, response_json_object, response_code_message=None): @@ -335,6 +353,34 @@ class JsonResource(HttpServer, resource.Resource): ) +def _options_handler(request): + """Request handler for OPTIONS requests + + This is a request handler suitable for return from + _get_handler_for_request. It returns a 200 and an empty body. + + Args: + request (twisted.web.http.Request): + + Returns: + Tuple[int, dict]: http code, response body. + """ + return 200, {} + + +def _unrecognised_request_handler(request): + """Request handler for unrecognised requests + + This is a request handler suitable for return from + _get_handler_for_request. It actually just raises an + UnrecognizedRequestError. + + Args: + request (twisted.web.http.Request): + """ + raise UnrecognizedRequestError() + + class RequestMetrics(object): def start(self, clock, name): self.start = clock.time_msec() diff --git a/synapse/metrics/__init__.py b/synapse/metrics/__init__.py index e0cfb7d08f..50d99d7a5c 100644 --- a/synapse/metrics/__init__.py +++ b/synapse/metrics/__init__.py @@ -57,15 +57,31 @@ class Metrics(object): return metric def register_counter(self, *args, **kwargs): + """ + Returns: + CounterMetric + """ return self._register(CounterMetric, *args, **kwargs) def register_callback(self, *args, **kwargs): + """ + Returns: + CallbackMetric + """ return self._register(CallbackMetric, *args, **kwargs) def register_distribution(self, *args, **kwargs): + """ + Returns: + DistributionMetric + """ return self._register(DistributionMetric, *args, **kwargs) def register_cache(self, *args, **kwargs): + """ + Returns: + CacheMetric + """ return self._register(CacheMetric, *args, **kwargs) |