Signed-off-by: rohit singh <145866377+Rohit-Singh-01@users.noreply.github.com>

…heus#1213)

choose_encoder compared the version parameter of the Accept header as a
tuple of mixed ints and strings, so a version such as 1.0.0-rc.1, a
quoted "1.0.0" or latest raised TypeError and the scrape answered 500.
Treat such a version as unsupported, which falls through to the next
media range and finally to text/plain version 0.0.4.

Signed-off-by: Christopher Krah <github@christopher-krah.com>

* Avoid parent lock for existing metric labelsets

Signed-off-by: skulitom <artemskulimovskiy@gmail.com>

* Comment the lock-free label lookup

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: skulitom <artemskulimovskiy@gmail.com>

---------

Signed-off-by: skulitom <artemskulimovskiy@gmail.com>
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

Honor q=0 when clients explicitly reject gzip encoding.
Add WSGI regression cases for gzip quality parameters.

Signed-off-by: mhatipog <metin.hatipogullari@gmail.com>

…us#1219)

Signed-off-by: nischita44 <nischitasadananda@gmail.com>

…rometheus#1204)

In the OpenMetrics exposition, the # HELP/# TYPE/# UNIT lines escape the
metric name with escape_metric_name() (which treats ':' as a valid metric
name character), but the sample line escaped it with the label-name rune
set, turning ':' into '_'. A metric such as 'sglang:token_usage' was then
emitted as 'sglang:token_usage' in the metadata lines but 'sglang_token_usage'
in the sample line, producing output that strict OpenMetrics parsers reject
as an orphaned metadata set plus an untyped metric.

Use escape_metric_name() for the sample name too, so the same helper drives
HELP, TYPE, UNIT and the sample line for every escaping scheme.

Fixes prometheus#1177

Signed-off-by: Md. Amdadul Bari Imad <amdadulbari@gmail.com>

…s#1205)

django_q and similar callers invoke this even when PROMETHEUS_MULTIPROC_DIR is missing. Return instead of passing None into os.path.join.

Signed-off-by: Hashim1999164 <64767361+Hashim1999164@users.noreply.github.com>

…eus#1218)

* Allow make_asgi_app to be added as a Starlette/FastAPI route

make_asgi_app() returned a plain function. Starlette (and therefore
FastAPI) treats a plain function passed to add_route() as a
request -> response endpoint rather than an ASGI app, so
app.add_route("/metrics", make_asgi_app()) failed with a TypeError.
The only working option was app.mount("/metrics", ...), which is a
path prefix: metrics are served at /metrics/ and requests for /metrics
get a 307 redirect.

Return a callable ASGI application object instead. Starlette passes
non-function callables through to Route as raw ASGI apps, so
add_route("/metrics", make_asgi_app()) now serves /metrics directly.
The returned object is called with the same (scope, receive, send)
signature, so mounting it or using it as a standalone ASGI app keeps
working.

Update the FastAPI docs to use add_route and explain the mount
behaviour.

Fixes prometheus#1016

Signed-off-by: Bhaskar Gurram <gurrambhaskar.ai@gmail.com>

* docs: note that add_route needs a release newer than 0.26.0

Signed-off-by: Bhaskar Gurram <gurrambhaskar.ai@gmail.com>

* tox: install starlette in the py3.9 and pypy3.9 envs

Runs the Starlette add_route and mount tests in CI instead of skipping
them, alongside the other optional framework dependencies.

Signed-off-by: Bhaskar Gurram <gurrambhaskar.ai@gmail.com>

---------

Signed-off-by: Bhaskar Gurram <gurrambhaskar.ai@gmail.com>

)

* Reject duplicate label names before metric registration

Signed-off-by: fhgffy <102001626+fhgffy@users.noreply.github.com>

* Improve duplicate label name diagnostics

Remove date prefixes and include each duplicated label name in the validation error. Cover multiple duplicates, repeated names and Unicode labels.

Signed-off-by: fhgffy <102001626+fhgffy@users.noreply.github.com>

---------

Signed-off-by: fhgffy <102001626+fhgffy@users.noreply.github.com>