Streaming command output

To stream command output as it is being executed, pass the onStdout, onStderr callbacks to the commands.run() method in JavaScript or the on_stdout, on_stderr callbacks to the commands.run() method in Python.

The SDK asks the sandbox for a keepalive ping every 50 seconds on every stream, so a stream normally stays open for more than an hour even while nothing is written. No single connection is guaranteed that long, so build your client to reconnect. See Stream connections.

import { Sandbox } from 'e2b'

const sandbox = await Sandbox.create()

const result = await sandbox.commands.run('echo hello; sleep 1; echo world', {
  onStdout: (data) => {
    console.log(data)
  },
  onStderr: (data) => {
    console.log(data)
  },
})
console.log(result)

from e2b import Sandbox

sandbox = Sandbox.create()

result = sandbox.commands.run('echo hello; sleep 1; echo world', on_stdout=lambda data: print(data), on_stderr=lambda data: print(data))
print(result)