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b40a50aad8* Add storage.passthrough to serve artifacts without storing them With storage.passthrough enabled the proxy streams every artifact from upstream to the client and never writes it to storage or the cache database. Metadata filtering, cooldown and the denylist work as before, so the proxy can sit behind another cache (e.g. an Artifactory remote) purely as a policy layer without holding a second copy of every package. Artifacts whose digest is known up front (OCI, Swift, Helm) are verified while streaming. Their responses are sent chunked and the connection is aborted on a mismatch, so a client never receives a tampered artifact as a complete response. Passthrough is rejected together with scanning, direct_serve and mirror_api, and the mirror command refuses to run with it, since all of them depend on stored artifacts. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> * Address review: abort truncated streams, guard every cache read - serveArtifact aborts the response on any body read error, and when fewer bytes than the declared size were written, not only on a digest mismatch. A failed or short upstream body in passthrough mode no longer reaches the client as a complete 200. - Streamed upstream read failures are logged and counted as stream_failed upstream errors before the response is aborted. - checkCache reports a miss when artifact caching is off, so every cache read path, including Swift archive HEAD requests, ignores entries stored before the mode was enabled. Denylisted versions are still rejected. - Rename storage.passthrough to storage.cache_artifacts (default true, PROXY_STORAGE_CACHE_ARTIFACTS), which names what actually changes. Tests cover an OCI blob shorter than its Content-Length and an npm tarball whose chunked response ends without the final chunk, both served through the HTTP handlers, plus a Swift HEAD request against a cached archive. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> * Rename Proxy.Passthrough to StreamArtifacts Match the storage.cache_artifacts option: the field says what changes (artifacts are streamed instead of stored) and its zero value keeps the usual caching behaviour for every Proxy built without the server config, such as the mirror command and tests. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> --------- Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com> |
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