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Direct-play sources sent the headers they were opened with for the whole session. LoadOptions.httpRequestAuthorization only reached native HLS, so when a host rotated its access token every later range request was refused, and the host had to reload the player at the current position to send the new Authorization header. The byte-range reader now accepts the same HTTPRequestAuthorization and asks it for the source URL before each request it builds: pump ranges, reconnects, seeks, detour blocks, size probes, the tail prefetch and the streaming GET. The answer replaces the static headers and then follows RedirectHeaderPolicy, so credentials never reach a cross-origin redirect target. A 401 asks the provider once with the headers that request carried, and a changed Authorization retries once at the same byte offset. Unchanged credentials, a second 401, or a provider that throws or exceeds its 10 s bound fail the read without running the reconnect ladder, and fail an open before anything is sent. Closing the reader cancels pending waits. The provider reaches the playback demuxer, its reopens and reloads, and the embedded-subtitle side readers. Static headers stay the default. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
…headers The direct-play authorization notes implied every progressive source follows the resolver. An audio-only source whose codec AVPlayer decodes is probed through the authorized reader, then handed to AVPlayer with the static httpHeaders, so token rotation does not reach it. Name that exception in the credential contract and the changelog. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
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Included review availability: This review used your included allowance. Your plan provides up to 1 included review per hour; 0 remain after this review. 📝 WalkthroughWalkthroughDirect-play HTTP requests now resolve authorization for source range requests and related reads. A changed ChangesDirect-Play Authorization
Priority: ➖ Normal Estimated code review effort: 4 (Complex) | ~50 minutes Change: Bug fix Sequence Diagram(s)sequenceDiagram
participant AVIOReader
participant SourceRequestAuthorizer
participant Origin
AVIOReader->>SourceRequestAuthorizer: Resolve headers for source URL
SourceRequestAuthorizer-->>AVIOReader: Return filtered headers
AVIOReader->>Origin: Send range request
Origin-->>AVIOReader: Return 401
AVIOReader->>SourceRequestAuthorizer: Resolve refreshed headers
SourceRequestAuthorizer-->>AVIOReader: Return changed Authorization
AVIOReader->>Origin: Retry the same range
Merge Risk: 🔵 Low · up to Direct-play requests now refresh credentials and retry once after a 401, and credentials are withheld from cross-origin redirects. The held-connection 401 path has no direct test and nothing was verified on a device or live server, so owners should watch those paths after merge. Security Architecture ReviewSecurity architecture risk: 🔵 Low · up to Credentials remain source-scoped, and authorization failures stop requests rather than bypassing controls. A bounded availability concern remains on supported visionOS 1: concurrent loads can occupy the worker pool needed to resolve their credentials, causing valid loads to time out. No credential-disclosure or privilege-expansion issue was established. Retained concerns
Security review detailsSecurity Blast Radius
Trust Boundaries and Controls
Resilience and Maintainability Implications
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✅ Passed checks (4 passed)
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Inline comments:
Review comments at @CHANGELOG.md:
- Line 26: Update the changelog entry about resolved credentials and
cross-origin redirects to limit its guarantee to the credential headers
recognized by RedirectHeaderPolicy; do not imply arbitrary resolver-supplied
headers are stripped.
Review comments at @docs/api.md:
- Around line 182-183: Revise the request-retry description in the API
documentation to distinguish failures by timing: state that an initial
credential resolver failure or timeout prevents dispatch, while an unchanged
credential, second 401, or refresh failure ends the read after a 401 response.
- Around line 178-180: Update RedirectHeaderPolicy to identify
resolver-designated credential headers and strip them from requests to
cross-origin targets, including pinned targets and redirect destinations.
Preserve non-credential headers and the existing same-origin and HTTP-to-HTTPS
upgrade behavior.
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.github/workflows/ci.ymlCHANGELOG.mdCONTRIBUTING.mdSources/AetherEngine/AetherEngine+Loading.swiftSources/AetherEngine/AetherEngine+Subtitles.swiftSources/AetherEngine/AetherEngine.swiftSources/AetherEngine/Demuxer/AVIOReader.swiftSources/AetherEngine/Demuxer/Demuxer.swiftSources/AetherEngine/Network/HLSOriginRelay.swiftSources/AetherEngine/Network/HTTPRequestAuthorization.swiftSources/AetherEngine/PlayerState.swiftSources/AetherEngine/Video/HLSVideoEngine+LiveReopen.swiftSources/AetherEngine/Video/HLSVideoEngine.swiftTests/AetherEngineTests/Issue255BodyReserveTests.swiftTests/AetherEngineTests/RefreshableDirectPlayAuthorizationTests.swiftdocs/api.md
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Every demuxer open runs inside a Task.detached, so with a direct-play resolver the open parks a cooperative-pool thread on an NSCondition while it waits for the resolver. The resolver itself ran in a Task.detached on that same pool. Opens that occupied every pool thread left their resolvers nowhere to start, so each failed at its 10 s bound as authorizationUnavailable. Before this branch the opens also blocked pool threads, but only on URLSession I/O, which completes on its own delegate queue and needs nothing from the pool. HTTPAuthorizationWait now starts the resolver with a task executor preference for a process-wide ResolverExecutor backed by a serial dispatch queue. A serial queue draws its thread from the overcommit root, so it starts while the pool is parked, and default actors the resolver awaits run there too. visionOS 1 keeps the previous detached task. The HLS relay shares the wait and gets the same isolation. The new test parks twice the pool's width of callers on one resolver that awaits an actor. Before the fix 22 of 32 timed out, and the parked pool starved the sibling tests in the suite. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
detourFetchBlock caught a provider refusal or timeout in its generic catch and returned .failed. serveFromDetour turned that into .miss, so readPersistent fell back to a seek reconnect that asked the provider a second time: a second wait of up to 10 s after an explicit refusal. A 401 on a detour block also became .miss, so the rejected headers never reached the provider and the reconnect sent another request with whatever it answered next. A detour fetch now follows the pump's contract. A provider that refuses or does not answer latches the refusal and fails the read without sending anything. A 401 drops an expired pin as before, then asks the provider with the rejected headers and retries the block once when the Authorization value changes; an unchanged credential or a second 401 latches the 401 and fails the read. The pump and the detour share one helper for that failure. Tests seek more than 8 MiB forward on a 16 MiB source with a 1 MiB window, then read behind it, for a refusal (one provider call, no request), a refreshed 401 (two block requests, stale then fresh), and an unchanged 401 (one block request, read fails). All three failed before this change. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
The byte-range reader asks HTTPRequestAuthorization about the source URL only, then ran its answer through the static-header redirect policy. That policy strips six named credential headers and replays the rest, so a custom credential from the resolver (X-Api-Key, Silo's X-Profile-Id/X-Profile-Token) reached a cross-origin redirect target and every request built against a target pinned from one. The held source connection follows its redirects inline and replayed its whole header set to the next hop, static Authorization included. RedirectHeaderPolicy.Headers now carries two sets per request chain: what a trusted hop gets and what an untrusted one gets. Static headers keep their old split (everything vs. all but the named credentials). A resolver answer is credential-scoped as a whole: a cross-origin hop or pinned target gets the non-credential static headers instead, which is what it would get without a resolver. The reader scopes the set to the request's target, its URLSession delegates and the held connection apply it per hop, and a redirect scrubs every credential-scoped header URLSession carried over. Same-origin requests and the http-to-https upgrade keep the full answer, and readers without a resolver send the same headers as before. The HLS relay is unchanged: it asks the resolver about every hop, so the resolver decides each destination's scope there. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
The direct-play paragraph listed unchanged credentials, a second 401 and a resolver failure together and said they "fail an open before anything is sent". Only the resolver failure happens before a request: the 401 cases end the read after the origin answered, and fail an open with that status rather than as authorizationUnavailable. The paragraph now lists the two groups apart, with what a load reports for each (.sourceOpenFailed for authorizationUnavailable, .sourceRefused with underlyingCode 401 after a 401), and the CHANGELOG entry draws the same line. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
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…ase-gate Bring in the review fixes from #12: resolvers run off the cooperative pool, backward detour reads latch authorization refusals, resolver headers stay off cross-origin targets, and the failure docs separate pre-send from post-401 failures. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
206f8e6 made a backward detour read latch an authorization refusal, but nothing read the latch on the way back in. A failed read leaves the cursor where it was, so the demuxer's retry took the backward branch to the detour fetch again: the provider was asked a second time, and after a 401 the block was requested again, with no generation delivery in between. The pump path did not have this gap, because its retry reaches recoverAuthorization, which returns the latch at once. detourFetchBlock now returns the latched refusal before it takes an origin slot, asks the provider or builds a request. A resident detour block is still served from memory. latchedAuthorizationRefusal() also replaces the open's inline read of the same latch. The refusal and unchanged-credential detour tests now read the same backward offset twice. Before this change the second read asked the provider again, and after a 401 sent a second block request. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
The detour tests re-anchored the pump at 12 MiB with a 1 MiB window and let it run. Under the parallel authorization group the pump's backpressure refill (bytes=14417920-) sometimes landed while a test was measuring: it showed up as an extra request, and its delivery lifted the detour's latched refusal, as a delivery is meant to, so the repeat read legitimately asked the provider again. The detour tests failed under group load and passed alone. A backward read takes the detour only while the pump is connected, so the anchored range now declares its full length, sends 64 KiB and goes silent. The pump stays connected and delivers nothing while the test measures. 12 of 12 authorization-group runs pass, and removing the latch check from detourFetchBlock still fails both latch tests. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
…ion group resolverRunsWhileThePoolIsParked parks twice the cooperative pool's width to prove the resolver no longer needs that pool. It ran in the authorization group, which exists to keep the relay suites' short deadlines away from blocking work. Even a pool parked for milliseconds delays those suites' async work. With the test, the group failed in 3 of 68 runs; without it, in 1 of 40, the same rate as the base branch. The test moves into its own suite, AuthorizationResolverExecutorTests, which runs in the main group. Its only bound is the authorizer's 5 s timeout, which main-group load cannot reach once the resolver is off the pool. It needs no CI step of its own, so ci.yml and CONTRIBUTING.md are unchanged. It is the same test: callers parked on twice the pool width, with a resolver that awaits an actor. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
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…ase-gate Bring in the second round of #12 review fixes: detour reads honour a latched authorization refusal, the detour tests no longer race the pump, and the pool-parking resolver test runs in the main test group. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
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Summary
Direct-play sources sent the headers they were opened with for the whole session.
LoadOptions.httpRequestAuthorizationonly reached native HLS, so after a host rotated its access token every later range request was refused, and the host had to reload the player at the current position to send the newAuthorizationheader. This PR lets the byte-range reader use the same resolver HLS already uses.Part of Silo-Server/silo-apple#611, which passes the resolver for direct play and drops the reload for those loads.
What changed
AVIOReaderasks theHTTPRequestAuthorizationresolver for the source URL before every request it builds:The answer replaces the static headers and then goes through
RedirectHeaderPolicy, so credentials never reach a cross-origin redirect target. Static headers stay the default when no resolver is set.A 401 asks the resolver once, passing the headers that request carried. A changed
Authorizationretries once at the same byte offset.These fail the read without running the reconnect ladder:
HTTPAuthorizationWait, the same limit as the HLS relay)At open, any of these fails the load as the new
AVIOReaderError.authorizationUnavailablebefore anything is sent. Closing the reader cancels pending waits, so the demux thread never blocks without a limit.The resolver reaches the playback demuxer, its reopens and reloads, live reopen, and the embedded-subtitle side readers. Remote disc images, one-shot probes, scrub thumbnails and live HLS ingest keep static headers.
Exception: an audio-only source whose codec AVPlayer decodes is probed through the authorized reader, then handed to AVPlayer with the static
httpHeaders, so token rotation does not reach it. The second commit documents this indocs/api.mdand the changelog.Review fixes, in later commits on this branch:
bf515f59). An open waiting for the resolver parks a cooperative-pool thread. Before this fix, opens filling the pool left the resolver nowhere to run.206f8e66,2df23a6a).93ba05d8). Cross-origin redirect targets, pinned targets and held-connection redirect hops get only the non-credential static headers. This also fixes an older leak onmain, where the held-connection transport replayed every header,Authorizationincluded, to the next hop.CHANGELOG.md, theLoadOptionsdoc comment,docs/api.md, and the separate authorization test group inci.ymlandCONTRIBUTING.md.Not included:
If-Range/ETag validation. The engine re-resolves redirects during a session, and different CDN edges can report different ETags for the same file, so rejecting on a mismatch could stop healthy playback.Test plan
Device / OS: macOS 27 (
swift build, the twoswift testcommands from CONTRIBUTING.md). Not run on an Apple TV or iPhone, and not against a live Silo server.Source media: none. A local scripted origin serves byte ranges and records the
Authorizationheader on each request.Result at
39587bc6:swift testpasses in both CONTRIBUTING.md groups. The main group runs 3,392 Swift Testing tests and 636 XCTest tests (1 skipped), includingresolverRunsWhileThePoolIsParked, which is kept out of the authorization group so parking the pool cannot slow the deadline-sensitive relay suites. The authorization group runs 65 tests. In 40 runs it failed once, in an older relay test, matching the base branch's rate. NewRefreshableDirectPlayAuthorizationTests:With the 401 recovery disabled, the retry and timeout tests fail.
Known gap: the held-connection path (
heldSourceConnection) is not exercised directly by a 401 test.Evidence: https://evidence.siloserver.org/r/aetherengine/direct-play-range-auth/
Checklist
CHANGELOG.mdupdatedfeat(...),fix(...),chore(...))AVIOReaderError.authorizationUnavailable;LoadOptions.httpRequestAuthorizationnow also covers direct play)AI disclosure
claude-opus-5-5🤖 Generated with Claude Code
Note
Add refreshable per-request authorization for direct-play HTTP reads
SourceRequestAuthorizerin HTTPRequestAuthorization.swift that resolves provider headers per byte-range request with a configurable timeout (default 10s), scoped to the source URL.AVIOReaderobtains authorization before each range request, retries once at the same offset with refreshed credentials after a 401 (only when theAuthorizationvalue changes), and latches refusal so reads stop rather than reconnect. Provider refusal or timeout fails the open with a new typedAVIOReaderError.authorizationUnavailable.RedirectHeaderPolicy.Headers(in RedirectHeaderPolicy.swift) strips them on untrusted cross-origin redirect targets, andHeldSourceConnectionreplays headers scoped to the original URL.LoadOptions.httpRequestAuthorizationnow flows through software, audio, native HLS, reloads, reopens, and subtitle side readers in AetherEngine+Loading.swift and AetherEngine+Subtitles.swift. Remote disc images and live ingest keep static headers.ResolverExecutorqueue, so they should suspend rather than block.RefreshableDirectPlayAuthorizationTestsin RefreshableDirectPlayAuthorizationTests.swift.Macroscope summarized 39587bc.