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