35 lines
1.2 KiB
Python
35 lines
1.2 KiB
Python
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
|