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![Jorik Schellekens](/assets/img/avatar_default.png)
* Configure and initialise tracer Includes config options for the tracer and sets up JaegerClient. * Scope manager using LogContexts We piggy-back our tracer scopes by using log context. The current log context gives us the current scope. If new scope is created we create a stack of scopes in the context. * jaeger is a dependency now * Carrier inject and extraction for Twisted Headers * Trace federation requests on the way in and out. The span is created in _started_processing and closed in _finished_processing because we need a meaningful log context. * Create logcontext for new scope. Instead of having a stack of scopes in a logcontext we create a new context for a new scope if the current logcontext already has a scope. * Remove scope from logcontext if logcontext is top level * Disable tracer if not configured * typo * Remove dependence on jaeger internals * bools * Set service name * :Explicitely state that the tracer is disabled * Black is the new black * Newsfile * Code style * Use the new config setup. * Generate config. * Copyright * Rename config to opentracing * Remove user whitelisting * Empty whitelist by default * User ConfigError instead of RuntimeError * Use isinstance * Use tag constants for opentracing. * Remove debug comment and no need to explicitely record error * Two errors a "s(c)entry" * Docstrings! * Remove debugging brainslip * Homeserver Whitlisting * Better opentracing config comment * linting * Inclue worker name in service_name * Make opentracing an optional dependency * Neater config retreival * Clean up dummy tags * Instantiate tracing as object instead of global class * Inlcude opentracing as a homeserver member. * Thread opentracing to the request level * Reference opetnracing through hs * Instantiate dummy opentracin g for tests. * About to revert, just keeping the unfinished changes just in case * Revert back to global state, commit number: 9ce4a3d9067bf9889b86c360c05ac88618b85c4f * Use class level methods in tracerutils * Start and stop requests spans in a place where we have access to the authenticated entity * Seen it, isort it * Make sure to close the active span. * I'm getting black and blue from this. * Logger formatting Co-Authored-By: Erik Johnston <erik@matrix.org> * Outdated comment * Import opentracing at the top * Return a contextmanager * Start tracing client requests from the servlet * Return noop context manager if not tracing * Explicitely say that these are federation requests * Include servlet name in client requests * Use context manager * Move opentracing to logging/ * Seen it, isort it again! * Ignore twisted return exceptions on context exit * Escape the scope * Scopes should be entered to make them useful. * Nicer decorator names * Just one init, init? * Don't need to close something that isn't open * Docs make you smarter
302 lines
9.5 KiB
Python
302 lines
9.5 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2014-2016 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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import logging
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from canonicaljson import json
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from synapse.api.errors import Codes, SynapseError
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from synapse.logging.opentracing import trace_servlet
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logger = logging.getLogger(__name__)
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def parse_integer(request, name, default=None, required=False):
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"""Parse an integer parameter from the request string
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Args:
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request: the twisted HTTP request.
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name (bytes/unicode): the name of the query parameter.
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default (int|None): value to use if the parameter is absent, defaults
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to None.
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required (bool): whether to raise a 400 SynapseError if the
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parameter is absent, defaults to False.
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Returns:
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int|None: An int value or the default.
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Raises:
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SynapseError: if the parameter is absent and required, or if the
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parameter is present and not an integer.
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"""
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return parse_integer_from_args(request.args, name, default, required)
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def parse_integer_from_args(args, name, default=None, required=False):
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if not isinstance(name, bytes):
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name = name.encode("ascii")
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if name in args:
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try:
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return int(args[name][0])
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except Exception:
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message = "Query parameter %r must be an integer" % (name,)
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raise SynapseError(400, message, errcode=Codes.INVALID_PARAM)
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else:
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if required:
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message = "Missing integer query parameter %r" % (name,)
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raise SynapseError(400, message, errcode=Codes.MISSING_PARAM)
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else:
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return default
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def parse_boolean(request, name, default=None, required=False):
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"""Parse a boolean parameter from the request query string
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Args:
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request: the twisted HTTP request.
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name (bytes/unicode): the name of the query parameter.
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default (bool|None): value to use if the parameter is absent, defaults
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to None.
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required (bool): whether to raise a 400 SynapseError if the
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parameter is absent, defaults to False.
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Returns:
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bool|None: A bool value or the default.
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Raises:
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SynapseError: if the parameter is absent and required, or if the
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parameter is present and not one of "true" or "false".
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"""
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return parse_boolean_from_args(request.args, name, default, required)
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def parse_boolean_from_args(args, name, default=None, required=False):
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if not isinstance(name, bytes):
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name = name.encode("ascii")
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if name in args:
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try:
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return {b"true": True, b"false": False}[args[name][0]]
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except Exception:
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message = (
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"Boolean query parameter %r must be one of" " ['true', 'false']"
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) % (name,)
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raise SynapseError(400, message)
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else:
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if required:
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message = "Missing boolean query parameter %r" % (name,)
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raise SynapseError(400, message, errcode=Codes.MISSING_PARAM)
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else:
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return default
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def parse_string(
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request,
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name,
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default=None,
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required=False,
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allowed_values=None,
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param_type="string",
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encoding="ascii",
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):
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"""
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Parse a string parameter from the request query string.
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If encoding is not None, the content of the query param will be
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decoded to Unicode using the encoding, otherwise it will be encoded
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Args:
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request: the twisted HTTP request.
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name (bytes|unicode): the name of the query parameter.
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default (bytes|unicode|None): value to use if the parameter is absent,
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defaults to None. Must be bytes if encoding is None.
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required (bool): whether to raise a 400 SynapseError if the
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parameter is absent, defaults to False.
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allowed_values (list[bytes|unicode]): List of allowed values for the
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string, or None if any value is allowed, defaults to None. Must be
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the same type as name, if given.
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encoding (str|None): The encoding to decode the string content with.
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Returns:
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bytes/unicode|None: A string value or the default. Unicode if encoding
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was given, bytes otherwise.
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Raises:
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SynapseError if the parameter is absent and required, or if the
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parameter is present, must be one of a list of allowed values and
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is not one of those allowed values.
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"""
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return parse_string_from_args(
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request.args, name, default, required, allowed_values, param_type, encoding
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)
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def parse_string_from_args(
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args,
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name,
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default=None,
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required=False,
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allowed_values=None,
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param_type="string",
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encoding="ascii",
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):
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if not isinstance(name, bytes):
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name = name.encode("ascii")
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if name in args:
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value = args[name][0]
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if encoding:
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value = value.decode(encoding)
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if allowed_values is not None and value not in allowed_values:
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message = "Query parameter %r must be one of [%s]" % (
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name,
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", ".join(repr(v) for v in allowed_values),
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)
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raise SynapseError(400, message)
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else:
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return value
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else:
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if required:
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message = "Missing %s query parameter %r" % (param_type, name)
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raise SynapseError(400, message, errcode=Codes.MISSING_PARAM)
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else:
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if encoding and isinstance(default, bytes):
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return default.decode(encoding)
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return default
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def parse_json_value_from_request(request, allow_empty_body=False):
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"""Parse a JSON value from the body of a twisted HTTP request.
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Args:
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request: the twisted HTTP request.
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allow_empty_body (bool): if True, an empty body will be accepted and
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turned into None
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Returns:
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The JSON value.
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Raises:
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SynapseError if the request body couldn't be decoded as JSON.
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"""
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try:
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content_bytes = request.content.read()
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except Exception:
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raise SynapseError(400, "Error reading JSON content.")
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if not content_bytes and allow_empty_body:
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return None
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# Decode to Unicode so that simplejson will return Unicode strings on
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# Python 2
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try:
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content_unicode = content_bytes.decode("utf8")
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except UnicodeDecodeError:
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logger.warn("Unable to decode UTF-8")
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raise SynapseError(400, "Content not JSON.", errcode=Codes.NOT_JSON)
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try:
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content = json.loads(content_unicode)
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except Exception as e:
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logger.warn("Unable to parse JSON: %s", e)
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raise SynapseError(400, "Content not JSON.", errcode=Codes.NOT_JSON)
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return content
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def parse_json_object_from_request(request, allow_empty_body=False):
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"""Parse a JSON object from the body of a twisted HTTP request.
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Args:
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request: the twisted HTTP request.
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allow_empty_body (bool): if True, an empty body will be accepted and
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turned into an empty dict.
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Raises:
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SynapseError if the request body couldn't be decoded as JSON or
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if it wasn't a JSON object.
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"""
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content = parse_json_value_from_request(request, allow_empty_body=allow_empty_body)
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if allow_empty_body and content is None:
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return {}
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if type(content) != dict:
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message = "Content must be a JSON object."
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raise SynapseError(400, message, errcode=Codes.BAD_JSON)
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return content
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def assert_params_in_dict(body, required):
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absent = []
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for k in required:
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if k not in body:
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absent.append(k)
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if len(absent) > 0:
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raise SynapseError(400, "Missing params: %r" % absent, Codes.MISSING_PARAM)
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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 register(self, http_server):
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""" Register this servlet with the given HTTP server. """
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if hasattr(self, "PATTERNS"):
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patterns = self.PATTERNS
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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_paths(
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method,
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patterns,
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trace_servlet(self.__class__.__name__, method_handler),
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)
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else:
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raise NotImplementedError("RestServlet must register something.")
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