1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
|
package header
import (
"fmt"
"strings"
"github.com/coredns/caddy"
"github.com/coredns/coredns/core/dnsserver"
"github.com/coredns/coredns/plugin"
)
func init() { plugin.Register("header", setup) }
func setup(c *caddy.Controller) error {
queryRules, responseRules, err := parse(c)
if err != nil {
return plugin.Error("header", err)
}
dnsserver.GetConfig(c).AddPlugin(func(next plugin.Handler) plugin.Handler {
return Header{
QueryRules: queryRules,
ResponseRules: responseRules,
Next: next,
}
})
return nil
}
func parse(c *caddy.Controller) ([]Rule, []Rule, error) {
for c.Next() {
var queryRules []Rule
var responseRules []Rule
for c.NextBlock() {
selector := strings.ToLower(c.Val())
var action string
if selector == "set" || selector == "clear" {
log.Warningf("The selector for header rule in line %d isn't explicit defined. "+
"Assume rule applies for selector 'response'. This syntax is deprecated. "+
"In future versions of CoreDNS the selector must be explicit defined.",
c.Line())
action = selector
selector = "response"
} else if selector == "query" || selector == "response" {
if c.NextArg() {
action = c.Val()
}
} else {
return nil, nil, fmt.Errorf("setting up rule: invalid selector=%s should be query or response", selector)
}
args := c.RemainingArgs()
rules, err := newRules(action, args)
if err != nil {
return nil, nil, fmt.Errorf("setting up rule: %w", err)
}
if selector == "response" {
responseRules = append(responseRules, rules...)
} else {
queryRules = append(queryRules, rules...)
}
}
if len(queryRules) > 0 || len(responseRules) > 0 {
return queryRules, responseRules, nil
}
}
return nil, nil, c.ArgErr()
}
|
