A response arriving during a hold was sent before it began, so a late
success no longer releases the host; only one after the hold has ended
does.
Artifact fetches check RateLimitGate.Held before calling the fetcher, so
held cache misses fail with the HeldError without counting as failures
in the host's circuit breaker.
Every handler that answers an upstream fetch error with 502 now answers
a held request with 503 and Retry-After instead.
OnHold and RecordUpstreamRateLimitHold drop the unused duration.
Since #431 the handler stores Conan archives under pkg:conan/{name} with the version as the version and the revisions and any user/channel in the filename. purl keeps conan names as they are, so package rules use the default mapping, and pkg:conan/zlib covers every version, revision and user/channel of the recipe.
The mirror can't fetch conan packages, so there's no mirror test.
Refs #306
* Conan 2 downloads recipe and package files from /v2/conans/.../revisions/{rrev}/files/{file} and .../packages/{id}/revisions/{prev}/files/{file}, but the handler only cached the invalid /v1/files and /v2/files paths, so archives were never stored. This adds the real routes and drops the old ones; manifests and conaninfo.txt stay in the metadata cache.
* Conan 2.25 can also compress archives with xz or zstd (conan_package.txz, conan_package.tzst and so on), so cache those too.
* Store Conan archives under plain name and version, like pkg:conan/zlib@1.3.1, with the revisions and any user/channel in the filename. The old name/version@user/channel with one version per revision never matched a denylist entry or what scanners look up.
* feat(storage): expose efficient seek for local files
Open file-backed artifacts with os.Open so local readers support
efficient seeking. Leave cloud storage readers unchanged.
Keep the legacy sidecar mapping test focused on fileblob's reader:
Blob.Open now reads local files directly and no longer consults the
sidecar. Continue checking sidecar cleanup and post-store reads.
* feat(handler): preserve efficient seek through integrity checks
Keep the cache result's single Reader field and preserve io.Seeker
when the underlying storage reader supports efficient seeking.
Sequential reads continue through whole-object integrity verification.
A successful seek switches subsequent reads to the source for range
responses, where full-object verification is not possible.
Test both modes and verify the source is closed once.
* feat(handler): add request-aware byte range responses
Add a request-aware artifact serving helper for bounded, open-ended,
and suffix byte ranges, including If-Range handling, 206 responses,
and 416 responses for valid unsatisfiable ranges.
Ignore malformed and multi-range requests by serving the full artifact.
Advertise byte-range support only for seekable readers, preserving HEAD,
redirect, and non-seekable behavior. Clarify that net/http recovers
ErrAbortHandler per request and keeps the server running.
* feat(handler): enable byte ranges across artifact downloads
Forward each artifact request to the shared range-aware response helper,
including cached generic release assets and OCI blobs. This lets the
handler honor ranges only when its reader supports efficient seeking,
without changing direct-storage redirect behavior.
Add warm-cache endpoint tests that assert partial response headers and
bytes without an upstream refetch. Document supported range behavior,
unsupported reader fallback, and the integrity limitation of partial reads.
Every built-in ecosystem upstream can now be set via the upstream
config block or PROXY_UPSTREAM_* env vars, with allow_private_hosts
and allow_loopback controlling access to non-public addresses.
Add a `proxy mirror` CLI command and `/api/mirror` API endpoints that
pre-populate the cache from various input sources: individual PURLs,
SBOM files (CycloneDX and SPDX), or full registry enumeration.
The mirror reuses the existing handler.Proxy.GetOrFetchArtifact()
pipeline so cached artifacts are identical to those fetched on demand.
A bounded worker pool controls download parallelism.
Metadata caching is opt-in via `cache_metadata: true` in config (or
PROXY_CACHE_METADATA=true). The mirror command always enables it. When
enabled, upstream metadata responses are stored for offline fallback
with ETag-based conditional revalidation.
New internal/mirror package with Source interface, PURLSource,
SBOMSource, RegistrySource, and async JobStore. New metadata_cache
database table for offline metadata serving.
All handler metadata and proxy requests were using http.DefaultClient directly,
bypassing any timeout or transport configuration. Added an HTTPClient field to
the Proxy struct with a 30-second default timeout, and updated every handler
to use it for upstream HTTP requests.
