electric-sql/electric @electric-sql/client@1.3.1

on GitHub

Patch Changes

• f6e7c75: Fix infinite 409 loop when proxy returns stale cached response with expired shape handle.

  Root cause: When a 409 response arrives, the client marks the old handle as expired and fetches with a new handle. If a proxy ignores the expired_handle cache buster parameter and returns a stale cached response containing the old handle, the client would accept it and enter an infinite 409 loop.

  The fix:

  • In #onInitialResponse: Don't accept a shape handle from the response if it matches the expired handle in the expired shapes cache
  • In getNextChunkUrl (prefetch): Don't prefetch the next chunk if the response handle equals the expired_handle from the request URL
  • Added console warnings when this situation is detected to help developers debug proxy misconfigurations

  This provides defense-in-depth against misconfigured proxies that don't include all query parameters in their cache keys.