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44 lines
1.4 KiB
Python
44 lines
1.4 KiB
Python
#
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# This file is licensed under the Affero General Public License (AGPL) version 3.
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#
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# Copyright (C) 2023 New Vector, Ltd
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as
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# published by the Free Software Foundation, either version 3 of the
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# License, or (at your option) any later version.
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#
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# See the GNU Affero General Public License for more details:
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# <https://www.gnu.org/licenses/agpl-3.0.html>.
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#
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# Originally licensed under the Apache License, Version 2.0:
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# <http://www.apache.org/licenses/LICENSE-2.0>.
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#
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# [This file includes modifications made by New Vector Limited]
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#
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#
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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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