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- from urllib.parse import parse_qs
- from .exposition import _bake_output
- from .registry import REGISTRY
- def make_asgi_app(registry=REGISTRY):
- """Create a ASGI app which serves the metrics from a registry."""
- async def prometheus_app(scope, receive, send):
- assert scope.get("type") == "http"
- # Prepare parameters
- params = parse_qs(scope.get('query_string', b''))
- accept_header = "Accept: " + ",".join([
- value.decode("utf8") for (name, value) in scope.get('headers')
- if name.decode("utf8") == 'accept'
- ])
- # Bake output
- status, header, output = _bake_output(registry, accept_header, params)
- # Return output
- payload = await receive()
- if payload.get("type") == "http.request":
- await send(
- {
- "type": "http.response.start",
- "status": int(status.split(' ')[0]),
- "headers": [
- tuple(x.encode('utf8') for x in header)
- ]
- }
- )
- await send({"type": "http.response.body", "body": output})
- return prometheus_app
|
