Function sendError

packages/vite/src/plugins/vite-node.ts:585–611

(socket: net.Socket, id: number, error: any)

}

function sendError (socket: net.Socket, id: number, error: any) {
  const errorResponse = {
    id,
    type: 'error',
    error: {
      message: error.message,
      stack: error.stack,
      status: error.status,
      statusText: error.statusText,
      data: error.data,
    },
  }
  const responseJSON = JSON.stringify(errorResponse)
  const messageBuffer = Buffer.from(responseJSON, 'utf-8')
  const messageLength = messageBuffer.length

  // Pre-allocate single buffer for length + message to avoid Buffer.concat()
  const fullMessage = Buffer.alloc(4 + messageLength)
  fullMessage.writeUInt32BE(messageLength, 0)
  messageBuffer.copy(fullMessage, 4)

  socket.write(fullMessage, (err) => {
    if (err) {
      // Failed to send error response - connection likely closed
    }
  })
}

export type ViteNodeServerOptions = {
  baseURL: string