You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
41 lines
1.6 KiB
Python
41 lines
1.6 KiB
Python
from typing import Callable
|
|
from urllib.parse import parse_qs
|
|
|
|
from .exposition import _bake_output
|
|
from .registry import CollectorRegistry, REGISTRY
|
|
|
|
|
|
def make_asgi_app(registry: CollectorRegistry = REGISTRY, disable_compression: bool = False) -> Callable:
|
|
"""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'').decode("utf8"))
|
|
accept_header = ",".join([
|
|
value.decode("utf8") for (name, value) in scope.get('headers')
|
|
if name.decode("utf8").lower() == 'accept'
|
|
])
|
|
accept_encoding_header = ",".join([
|
|
value.decode("utf8") for (name, value) in scope.get('headers')
|
|
if name.decode("utf8").lower() == 'accept-encoding'
|
|
])
|
|
# Bake output
|
|
status, headers, output = _bake_output(registry, accept_header, accept_encoding_header, params, disable_compression)
|
|
formatted_headers = []
|
|
for header in headers:
|
|
formatted_headers.append(tuple(x.encode('utf8') for x in header))
|
|
# Return output
|
|
payload = await receive()
|
|
if payload.get("type") == "http.request":
|
|
await send(
|
|
{
|
|
"type": "http.response.start",
|
|
"status": int(status.split(' ')[0]),
|
|
"headers": formatted_headers,
|
|
}
|
|
)
|
|
await send({"type": "http.response.body", "body": output})
|
|
|
|
return prometheus_app
|