services/mtg-online-drafter
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mtg-online-drafter/docs/development/devlog/2025-12-17-152700_fix_socket_payload_limit.md

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Fix Socket.IO Payload Limit

Issue

The user reported a 413 (Payload Too Large) error when creating a draft room with a full box of 36 packs. This was caused by the default maxHttpBufferSize limit (1MB) in Socket.IO, which is insufficient for the large JSON payload generated by 540 cards (36 packs * 15 cards) with full metadata.

Resolution

  • Modified src/server/index.ts to increase maxHttpBufferSize to 300MB (3e8 bytes).
  • This explicitly sets the limit in the Server initialization options.

Verification

  • tsx watch should automatically restart the server.
  • The new limit allows for massive payloads, covering the requirement for 36+ packs (requested >250MB).