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|
package errors
import (
"regexp"
"time"
"github.com/coredns/caddy"
"github.com/coredns/coredns/core/dnsserver"
"github.com/coredns/coredns/plugin"
)
func init() { plugin.Register("errors", setup) }
func setup(c *caddy.Controller) error {
handler, err := errorsParse(c)
if err != nil {
return plugin.Error("errors", err)
}
c.OnShutdown(func() error {
handler.stop()
return nil
})
dnsserver.GetConfig(c).AddPlugin(func(next plugin.Handler) plugin.Handler {
handler.Next = next
return handler
})
return nil
}
func errorsParse(c *caddy.Controller) (*errorHandler, error) {
handler := newErrorHandler()
i := 0
for c.Next() {
if i > 0 {
return nil, plugin.ErrOnce
}
i++
args := c.RemainingArgs()
switch len(args) {
case 0:
case 1:
if args[0] != "stdout" {
return nil, c.Errf("invalid log file: %s", args[0])
}
default:
return nil, c.ArgErr()
}
for c.NextBlock() {
switch c.Val() {
case "stacktrace":
dnsserver.GetConfig(c).Stacktrace = true
case "consolidate":
pattern, err := parseConsolidate(c)
if err != nil {
return nil, err
}
handler.patterns = append(handler.patterns, pattern)
default:
return handler, c.SyntaxErr("Unknown field " + c.Val())
}
}
}
return handler, nil
}
func parseConsolidate(c *caddy.Controller) (*pattern, error) {
args := c.RemainingArgs()
if len(args) < 2 || len(args) > 3 {
return nil, c.ArgErr()
}
p, err := time.ParseDuration(args[0])
if err != nil {
return nil, c.Err(err.Error())
}
re, err := regexp.Compile(args[1])
if err != nil {
return nil, c.Err(err.Error())
}
lc, err := parseLogLevel(c, args)
if err != nil {
return nil, err
}
return &pattern{period: p, pattern: re, logCallback: lc}, nil
}
func parseLogLevel(c *caddy.Controller, args []string) (func(format string, v ...interface{}), error) {
if len(args) != 3 {
return log.Errorf, nil
}
switch args[2] {
case "warning":
return log.Warningf, nil
case "error":
return log.Errorf, nil
case "info":
return log.Infof, nil
case "debug":
return log.Debugf, nil
default:
return nil, c.Errf("unknown log level argument in consolidate: %s", args[2])
}
}
|
