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plugin/metadata: add metadata plugin (#1894)

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* plugin/metadata: add metadata plugin

* plugin/metadata: Add MD struct, refactor code, fix doc

* plugin/metadata: simplify metadata key

* plugin/metadata: improve setup_test

* Support of metadata by rewrite plugin. Move calculated variables to metadata.

* Move variables from metadata to pkg, add UTs, READMEs change, metadata small fixes

* Add client port validation to variables_test

* plugin/metadata: improve README

* plugin/metadata: rename methods

* plugin/metadata: Update Metadataer interface, update doc, cosmetic code changes

* plugin/metadata: move colllisions check to OnStartup(). Fix default variables metadataer.

* plugin/metadata: Fix comment for method setValue

* plugin/metadata: change variables order to fix linter warning

* plugin/metadata: rename Metadataer to Provider
This commit is contained in:
Eugen Kleiner
2018-06-29 12:44:16 +03:00
committed by Miek Gieben
parent dae506b563
commit 17d807f05f
19 changed files with 655 additions and 130 deletions
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4
plugin/rewrite/rewrite.go
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@@ -42,7 +42,7 @@ type Rewrite struct {
func (rw Rewrite) ServeDNS(ctx context.Context, w dns.ResponseWriter, r *dns.Msg) (int, error) {
wr := NewResponseReverter(w, r)
for _, rule := range rw.Rules {
switch result := rule.Rewrite(w, r); result {
switch result := rule.Rewrite(ctx, w, r); result {
case RewriteDone:
respRule := rule.GetResponseRule()
if respRule.Active == true {
@@ -76,7 +76,7 @@ func (rw Rewrite) Name() string { return "rewrite" }
// Rule describes a rewrite rule.
type Rule interface {
// Rewrite rewrites the current request.
Rewrite(dns.ResponseWriter, *dns.Msg) Result
Rewrite(context.Context, dns.ResponseWriter, *dns.Msg) Result
// Mode returns the processing mode stop or continue.
Mode() string
// GetResponseRule returns the rule to rewrite response with, if any.