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39 lines
1.3 KiB
Python
39 lines
1.3 KiB
Python
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# Copyright 2015-2019 Prometheus Python Client Developers
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# Copyright 2019 Matrix.org Foundation C.I.C.
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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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from prometheus_client import REGISTRY, CollectorRegistry, generate_latest
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from twisted.web.resource import Resource
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from twisted.web.server import Request
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CONTENT_TYPE_LATEST = "text/plain; version=0.0.4; charset=utf-8"
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class MetricsResource(Resource):
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"""
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Twisted ``Resource`` that serves prometheus metrics.
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"""
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isLeaf = True
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def __init__(self, registry: CollectorRegistry = REGISTRY):
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self.registry = registry
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def render_GET(self, request: Request) -> bytes:
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request.setHeader(b"Content-Type", CONTENT_TYPE_LATEST.encode("ascii"))
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response = generate_latest(self.registry)
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request.setHeader(b"Content-Length", str(len(response)))
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return response
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