func errorsParse(c *caddy.Controller) (*ErrorHandler, error) {
// Very important that we make a pointer because the startup
// function that opens the log file must have access to the
// same instance of the handler, not a copy.
handler := &ErrorHandler{ErrorPages: make(map[int]string)}
cfg := httpserver.GetConfig(c)
optionalBlock := func() (bool, error) {
var hadBlock bool
for c.NextBlock() {
hadBlock = true
what := c.Val()
if !c.NextArg() {
return hadBlock, c.ArgErr()
}
where := c.Val()
if what == "log" {
if where == "visible" {
handler.Debug = true
} else {
handler.LogFile = where
if c.NextArg() {
if c.Val() == "{" {
c.IncrNest()
logRoller, err := httpserver.ParseRoller(c)
if err != nil {
return hadBlock, err
}
handler.LogRoller = logRoller
}
}
}
} else {
// Error page; ensure it exists
where = filepath.Join(cfg.Root, where)
f, err := os.Open(where)
if err != nil {
log.Printf("[WARNING] Unable to open error page '%s': %v", where, err)
}
f.Close()
if what == "*" {
if handler.GenericErrorPage != "" {
return hadBlock, c.Errf("Duplicate status code entry: %s", what)
}
handler.GenericErrorPage = where
} else {
whatInt, err := strconv.Atoi(what)
if err != nil {
return hadBlock, c.Err("Expecting a numeric status code or '*', got '" + what + "'")
}
if _, exists := handler.ErrorPages[whatInt]; exists {
return hadBlock, c.Errf("Duplicate status code entry: %s", what)
}
handler.ErrorPages[whatInt] = where
}
}
}
return hadBlock, nil
}
for c.Next() {
// weird hack to avoid having the handler values overwritten.
if c.Val() == "}" {
continue
}
// Configuration may be in a block
hadBlock, err := optionalBlock()
if err != nil {
return handler, err
}
// Otherwise, the only argument would be an error log file name or 'visible'
if !hadBlock {
if c.NextArg() {
if c.Val() == "visible" {
handler.Debug = true
} else {
handler.LogFile = c.Val()
}
}
}
}
return handler, nil
}