120 lines
		
	
	
		
			3.9 KiB
		
	
	
	
		
			Python
		
	
	
			
		
		
	
	
			120 lines
		
	
	
		
			3.9 KiB
		
	
	
	
		
			Python
		
	
	
# Copyright 2018 New Vector 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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import logging
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from typing import TYPE_CHECKING, Optional
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from twisted.web.resource import Resource
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from twisted.web.server import Request
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from synapse.http.server import set_cors_headers
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from synapse.http.site import SynapseRequest
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from synapse.types import JsonDict
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from synapse.util import json_encoder
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from synapse.util.stringutils import parse_server_name
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if TYPE_CHECKING:
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    from synapse.server import HomeServer
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logger = logging.getLogger(__name__)
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class WellKnownBuilder:
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    def __init__(self, hs: "HomeServer"):
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        self._config = hs.config
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    def get_well_known(self) -> Optional[JsonDict]:
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        if not self._config.server.serve_client_wellknown:
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            return None
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        result = {"m.homeserver": {"base_url": self._config.server.public_baseurl}}
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        if self._config.registration.default_identity_server:
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            result["m.identity_server"] = {
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                "base_url": self._config.registration.default_identity_server
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            }
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        if self._config.server.extra_well_known_client_content:
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            for (
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                key,
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                value,
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            ) in self._config.server.extra_well_known_client_content.items():
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                if key not in result:
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                    result[key] = value
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        return result
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class ClientWellKnownResource(Resource):
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    """A Twisted web resource which renders the .well-known/matrix/client file"""
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    isLeaf = 1
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    def __init__(self, hs: "HomeServer"):
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        Resource.__init__(self)
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        self._well_known_builder = WellKnownBuilder(hs)
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    def render_GET(self, request: SynapseRequest) -> bytes:
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        set_cors_headers(request)
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        r = self._well_known_builder.get_well_known()
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        if not r:
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            request.setResponseCode(404)
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            request.setHeader(b"Content-Type", b"text/plain")
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            return b".well-known not available"
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        logger.debug("returning: %s", r)
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        request.setHeader(b"Content-Type", b"application/json")
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        return json_encoder.encode(r).encode("utf-8")
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class ServerWellKnownResource(Resource):
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    """Resource for .well-known/matrix/server, redirecting to port 443"""
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    isLeaf = 1
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    def __init__(self, hs: "HomeServer"):
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        super().__init__()
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        self._serve_server_wellknown = hs.config.server.serve_server_wellknown
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        host, port = parse_server_name(hs.config.server.server_name)
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        # If we've got this far, then https://<server_name>/ must route to us, so
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        # we just redirect the traffic to port 443 instead of 8448.
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        if port is None:
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            port = 443
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        self._response = json_encoder.encode({"m.server": f"{host}:{port}"}).encode(
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            "utf-8"
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        )
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    def render_GET(self, request: Request) -> bytes:
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        if not self._serve_server_wellknown:
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            request.setResponseCode(404)
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            request.setHeader(b"Content-Type", b"text/plain")
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            return b"404. Is anything ever truly *well* known?\n"
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        request.setHeader(b"Content-Type", b"application/json")
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        return self._response
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def well_known_resource(hs: "HomeServer") -> Resource:
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    """Returns a Twisted web resource which handles '.well-known' requests"""
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    res = Resource()
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    matrix_resource = Resource()
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    res.putChild(b"matrix", matrix_resource)
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    matrix_resource.putChild(b"server", ServerWellKnownResource(hs))
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    matrix_resource.putChild(b"client", ClientWellKnownResource(hs))
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    return res
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