Example #1
0
// registerCallback registers a callback function to execute by
// using c to parse the line. It appends the callback function
// to the list of callback functions passed in by reference.
func registerCallback(c *Controller, list *[]func() error) error {
	for c.Next() {
		args := c.RemainingArgs()
		if len(args) == 0 {
			return c.ArgErr()
		}

		nonblock := false
		if len(args) > 1 && args[len(args)-1] == "&" {
			// Run command in background; non-blocking
			nonblock = true
			args = args[:len(args)-1]
		}

		command, args, err := middleware.SplitCommandAndArgs(strings.Join(args, " "))
		if err != nil {
			return c.Err(err.Error())
		}

		fn := func() error {
			cmd := exec.Command(command, args...)
			cmd.Stdin = os.Stdin
			cmd.Stdout = os.Stdout
			cmd.Stderr = os.Stderr

			if nonblock {
				return cmd.Start()
			} else {
				return cmd.Run()
			}
		}

		*list = append(*list, fn)
	}

	return nil
}
Example #2
0
func webSocketParse(c *Controller) ([]websockets.Config, error) {
	var websocks []websockets.Config
	var respawn bool

	optionalBlock := func() (hadBlock bool, err error) {
		for c.NextBlock() {
			hadBlock = true
			if c.Val() == "respawn" {
				respawn = true
			} else {
				return true, c.Err("Expected websocket configuration parameter in block")
			}
		}
		return
	}

	for c.Next() {
		var val, path, command string

		// Path or command; not sure which yet
		if !c.NextArg() {
			return nil, c.ArgErr()
		}
		val = c.Val()

		// Extra configuration may be in a block
		hadBlock, err := optionalBlock()
		if err != nil {
			return nil, err
		}

		if !hadBlock {
			// The next argument on this line will be the command or an open curly brace
			if c.NextArg() {
				path = val
				command = c.Val()
			} else {
				path = "/"
				command = val
			}

			// Okay, check again for optional block
			hadBlock, err = optionalBlock()
			if err != nil {
				return nil, err
			}
		}

		// Split command into the actual command and its arguments
		cmd, args, err := middleware.SplitCommandAndArgs(command)
		if err != nil {
			return nil, err
		}

		websocks = append(websocks, websockets.Config{
			Path:      path,
			Command:   cmd,
			Arguments: args,
			Respawn:   respawn, // TODO: This isn't used currently
		})
	}

	return websocks, nil

}