Race WhatsApp chat sockets like the web client - #44
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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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Limit details: You’ve used the included review currently available. Your 65 included PR review attempts over the past 7 days set your current allowance at 1 review per hour. 📝 WalkthroughWalkthroughThe client can race multiple WebSocket endpoints, close losing sockets with an explicit reason, and disable the post-connect passive IQ. The socket package adds race handling and tests for winner selection, cleanup, cancellation, and failure cases. ChangesWebSocket connection controls
Estimated code review effort: 4 (Complex) | ~45 minutes Merge Risk: ⚪ Minimal · up to This adds opt-in endpoint racing, explicit loser close reasons, and optional passive-IQ suppression while retaining the existing default connection behavior. No concrete merge-blocking risk remains in the available evidence. Sequence Diagram(s)sequenceDiagram
participant Client
participant ConnectRace
participant FrameSocket
Client->>ConnectRace: Connect to configured endpoints
ConnectRace->>FrameSocket: Start concurrent WebSocket dials
FrameSocket-->>ConnectRace: Return successful connection
ConnectRace->>FrameSocket: Cancel outstanding dials
ConnectRace->>FrameSocket: Close later winners with loser reason
ConnectRace-->>Client: Return first connected socket
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✅ Passed checks (4 passed)
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Actionable comments posted: 2
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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
delivers both values to the server.
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client.goconnectionevents.gosocket/framesocket.gosocket/race.gosocket/race_test.go
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Actionable comments posted: 1
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Inline comments:
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
corresponding dial completion state proves it was still pending; do not treat
every canceledDial record as sufficient.
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socket/race.gosocket/race_test.go
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Inline comments:
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
shutdown path while preserving cancellation for active racers.
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client.goconnectionevents.gosocket/framesocket.gosocket/race.gosocket/race_test.go
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Review fixes appliedResolved the three active socket-race findings in
Files modified:
Commit: Validation passed: full tests with and without the race detector, |
1 participant
WhatsApp Web opens both chat websocket endpoints concurrently and closes an opened loser with status 1000 and reason
loser socket. This adds an opt-inSocketConfig.RaceURLspath that keeps the first successful connection, cancels outstanding dials, and sends the matching close frame to an already-open loser. The existing single-socket behavior remains the default.The change also lets callers suppress the post-connect passive IQ when their login payload already declares
passive: false. Racer contexts now own only each HTTP upgrade and are released when that attempt completes. Opened sockets remain bound to the caller context, so canceling pending dials cannot tear down an upgraded loser before its close frame is sent.Validation:
go test -race ./...go test ./...go vet ./...go test -race ./socket -run '^TestConnectRaceLeavesOneSocket$' -count=50git diff --checkNeed help on this PR? Tag
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