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76 lines
2.6 KiB
Python
76 lines
2.6 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2014 OpenMarket Ltd
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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""" This module contains base REST classes for constructing REST servlets. """
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from synapse.api.urls import CLIENT_PREFIX
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from synapse.rest.transactions import HttpTransactionStore
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import re
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def client_path_pattern(path_regex):
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"""Creates a regex compiled client path with the correct client path
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prefix.
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Args:
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path_regex (str): The regex string to match. This should NOT have a ^
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as this will be prefixed.
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Returns:
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SRE_Pattern
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"""
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return re.compile("^" + CLIENT_PREFIX + path_regex)
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class RestServlet(object):
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""" A Synapse REST Servlet.
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An implementing class can either provide its own custom 'register' method,
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or use the automatic pattern handling provided by the base class.
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To use this latter, the implementing class instead provides a `PATTERN`
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class attribute containing a pre-compiled regular expression. The automatic
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register method will then use this method to register any of the following
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instance methods associated with the corresponding HTTP method:
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on_GET
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on_PUT
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on_POST
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on_DELETE
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on_OPTIONS
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Automatically handles turning CodeMessageExceptions thrown by these methods
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into the appropriate HTTP response.
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"""
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def __init__(self, hs):
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self.hs = hs
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self.handlers = hs.get_handlers()
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self.event_factory = hs.get_event_factory()
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self.auth = hs.get_auth()
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self.txns = HttpTransactionStore()
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def register(self, http_server):
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""" Register this servlet with the given HTTP server. """
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if hasattr(self, "PATTERN"):
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pattern = self.PATTERN
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for method in ("GET", "PUT", "POST", "OPTIONS", "DELETE"):
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if hasattr(self, "on_%s" % (method)):
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method_handler = getattr(self, "on_%s" % (method))
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http_server.register_path(method, pattern, method_handler)
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else:
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raise NotImplementedError("RestServlet must register something.")
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