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plugin/metadata: metadata is just label=value (#1914)

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This revert 17d807f0 and re-adds the metadata plugin as a plugin that
just sets a label to a value function.

Add package documentation on how to use the metadata package. Make it
clear that any caching is up to the Func implemented.

There are now - no in tree users. We could add the request metadata by
default under names that copy request.Request, i.e

request/ip - remote IP
request/port - remote port

Variables.go has been deleted.

Signed-off-by: Miek Gieben <miek@miek.nl>
This commit is contained in:
Miek Gieben
2018-07-01 20:01:17 +01:00
committed by GitHub
parent 0b326e2686
commit 99800a687c
16 changed files with 229 additions and 371 deletions
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11
plugin/rewrite/name.go
View File

@@ -1,7 +1,6 @@
package rewrite
import (
"context"
"fmt"
"regexp"
"strconv"
@@ -58,7 +57,7 @@ const (
// Rewrite rewrites the current request based upon exact match of the name
// in the question section of the request
func (rule *nameRule) Rewrite(ctx context.Context, w dns.ResponseWriter, r *dns.Msg) Result {
func (rule *nameRule) Rewrite(w dns.ResponseWriter, r *dns.Msg) Result {
if rule.From == r.Question[0].Name {
r.Question[0].Name = rule.To
return RewriteDone
@@ -67,7 +66,7 @@ func (rule *nameRule) Rewrite(ctx context.Context, w dns.ResponseWriter, r *dns.
}
// Rewrite rewrites the current request when the name begins with the matching string
func (rule *prefixNameRule) Rewrite(ctx context.Context, w dns.ResponseWriter, r *dns.Msg) Result {
func (rule *prefixNameRule) Rewrite(w dns.ResponseWriter, r *dns.Msg) Result {
if strings.HasPrefix(r.Question[0].Name, rule.Prefix) {
r.Question[0].Name = rule.Replacement + strings.TrimLeft(r.Question[0].Name, rule.Prefix)
return RewriteDone
@@ -76,7 +75,7 @@ func (rule *prefixNameRule) Rewrite(ctx context.Context, w dns.ResponseWriter, r
}
// Rewrite rewrites the current request when the name ends with the matching string
func (rule *suffixNameRule) Rewrite(ctx context.Context, w dns.ResponseWriter, r *dns.Msg) Result {
func (rule *suffixNameRule) Rewrite(w dns.ResponseWriter, r *dns.Msg) Result {
if strings.HasSuffix(r.Question[0].Name, rule.Suffix) {
r.Question[0].Name = strings.TrimRight(r.Question[0].Name, rule.Suffix) + rule.Replacement
return RewriteDone
@@ -86,7 +85,7 @@ func (rule *suffixNameRule) Rewrite(ctx context.Context, w dns.ResponseWriter, r
// Rewrite rewrites the current request based upon partial match of the
// name in the question section of the request
func (rule *substringNameRule) Rewrite(ctx context.Context, w dns.ResponseWriter, r *dns.Msg) Result {
func (rule *substringNameRule) Rewrite(w dns.ResponseWriter, r *dns.Msg) Result {
if strings.Contains(r.Question[0].Name, rule.Substring) {
r.Question[0].Name = strings.Replace(r.Question[0].Name, rule.Substring, rule.Replacement, -1)
return RewriteDone
@@ -96,7 +95,7 @@ func (rule *substringNameRule) Rewrite(ctx context.Context, w dns.ResponseWriter
// Rewrite rewrites the current request when the name in the question
// section of the request matches a regular expression
func (rule *regexNameRule) Rewrite(ctx context.Context, w dns.ResponseWriter, r *dns.Msg) Result {
func (rule *regexNameRule) Rewrite(w dns.ResponseWriter, r *dns.Msg) Result {
regexGroups := rule.Pattern.FindStringSubmatch(r.Question[0].Name)
if len(regexGroups) == 0 {
return RewriteIgnored