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…nt does WhatsApp Web opens wss://web.whatsapp.com/ws/chat and wss://web.whatsapp.com:5222/ws/chat concurrently on every connect and closes the one that loses with code 1000 and the reason "loser socket" (WAWebOpenSocket.js:10, 44-52). A client that makes exactly one attempt per connect and never closes a second socket differs from the real one by nothing more than counting. - socket.ConnectRace opens every URL concurrently, keeps the first to connect, aborts the dials still outstanding and closes an already-open loser with the client's own code and reason. - FrameSocket.CloseWithReason carries an explicit close reason; Close keeps its signature and passes an empty one. - SocketConfig.RaceURLs opts a client in; empty keeps the single-socket path. - Client.DisablePostConnectPassiveIQ stops the library sending the passive/active IQ after connect, which the real client never sends: WhatsApp Web puts passive:false in the login payload itself (WAWebGetClientPayloadForLogin.js:14-19).
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Merge Risk: 🔵 Low · up to When the opt-in endpoint racing is enabled, a connection rejected with a non-retryable status can still trigger background reconnects if another endpoint fails with a network error. This contradicts the documented behavior. The impact is limited to the new opt-in mode, and the default behavior is unchanged. A small fix is recommended before or soon after merge. Pre-merge checks |
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| Check name | Status | Explanation | Resolution |
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| Docstring Coverage |  |
Docstring coverage is 43.75% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 16 functions across 5 files. (3 skipped: … | Write docstrings for the functions missing them to satisfy the coverage threshold. |
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Check name Status Explanation Linked Issues check Check skipped because no linked issues were found for this pull request. Out of Scope Changes check Check skipped because no linked issues were found for this pull request. Title check The title clearly and concisely describes the primary change: racing WhatsApp chat socket connections to match web-client behavior. Description check The description is detailed, relevant, and documents the implementation, compatibility, validation, and scope. It does not include the repository checklist section, but the missing checklist is a mino…
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Docstring coverage is 43.75% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 16 functions across 5 files. (3 skipped: 3 unsupported.)
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Inline comments:
In `@socket/race.go`:
- Around line 98-101: Update the cancellation loop in the race connection flow
to distinguish racers still dialing from racers whose fs.Connect succeeded.
Cancel only pending dials; for every successful non-winner, preserve its
connection long enough to call CloseWithReason before cleanup. Ensure the winner
remains open and TestConnectRaceLeavesOneSocket observes the expected close code
and reason.
- Around line 128-132: Update the header-copying logic in newRacer to preserve
all values from each headers entry: clear any existing destination values, then
add every source value to fs.HTTPHeaders instead of retaining only values[0].
Add an integration test covering a header with two values and verify ConnectRace
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client.goconnectionevents.gosocket/framesocket.gosocket/race.gosocket/race_test.go
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In `@socket/race_test.go`:
- Around line 179-182: Update the race test’s loser-record validation around
explicitLoser and canceledDial so both dials are deterministically completed
before asserting cleanup. Require at least one normal-closure record with
LoserSocketCloseReason, and accept an abnormal (-1, "") record only when the
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socket/race.gosocket/race_test.go
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- socket/race.go
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In `@socket/race.go`:
- Line 74: Update ConnectRace to ensure the winning racer context is released
after the returned FrameSocket shuts down: either use a context scoped only to
dialing, or retain the winner’s CancelFunc and invoke it from the FrameSocket
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Review fixes appliedResolved the three active socket-race findings in
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- Around line 133-135: Update isRetryableConnectError to check ErrWithStatusCode
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.github/workflows/go.ymlCHANGELOG.mdREADME.mdclient.gosocket/framesocket.gosocket/race.gosocket/race_test.go
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Concurrent chat socket connections are opt-in through
SocketConfig.RaceURLs. The first successful upgrade proceeds to the Noise handshake immediately; pending upgrades are canceled and opened losers close asynchronously with status 1000 and reasonloser socket. Single-endpoint connections remain the default.Client.DisablePostConnectPassiveIQseparately suppresses the post-connect passive/active IQ for login payloads that already declare an active connection.This branch includes
mainatb0e8e85a4and preserves its handshake queue and disconnect handling. The review fixes provide the racing symbols on JS/WASM, start read pumps only for winners, release blocked frame delivery on cancellation, preserve repeated and empty header entries, and join unsuccessful endpoint errors in configured order. Initial reconnect classification gives the first matching HTTP status precedence over other racers' network errors. Dial contexts are released independently of opened socket lifetimes.Validation at
baca49525d3b3f7d7401d8b8f5c28f8ebbb0e7d6:benchmark_legacybuilds, plus the race detector.git diff --check.Tests use local WebSocket endpoints. No live WhatsApp session, browser-hosted WASM session, deployment, or release tag was exercised or created.
SocketConfig.RaceURLs,Client.DisablePostConnectPassiveIQ,socket.ConnectRaceand close-reason support. Existing single-socket defaults remain. Polymorfa HTTP handlers, schemas, authentication, webhooks and streaming contracts are unaffected.Platform consumer inspection used
polymorfacommit18289c6d416fab4e975809c786621a555dc2afbb:apps/api/go.modpins HyperMeow90f9e4ec2c88, andapps/api/internal/runner/runner.goconfigures neither new option. This PR does not update that pin or claim deployed Platform availability.