// 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
}
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
}