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OpenHands/openhands/server/session/README.md
Engel Nyst a03ad1079c
Rename oh_action to oh_user_action for clarity (#7368) 
Co-authored-by: openhands <openhands@all-hands.dev>
2025-03-21 22:23:15 +00:00

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Session Management

Socket.io is used as the underlying protocol for client server communication. This allows the event handlers in the code to be somewhat separate from the connection management - so brief connection interruptions are recoverable.

There are 3 main server side event handlers:

  • connect - Invoked when a new connection to the server is established. (This may be via http or WebSocket)
  • oh_user_action - Invoked when a connected client sends an event (such as a prompt for the Agent) - this is distinct from the oh_event sent from the server to the client.
  • disconnect - Invoked when a connected client disconnects from the server.

Disconnect

The (manager)[manager.py] manages connections and sessions. Each session may have zero or more connections associated with it. When a session no longer has any connections associated with it, after a set amount of time (determined by config.sandbox.close_delay), the session and runtime are passivated (So will need to be rehydrated to continue.)