mirror of
https://github.com/coredns/coredns.git
synced 2025-10-31 10:13:14 -04:00
99800a687c
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>
62 lines
1.2 KiB
Go
62 lines
1.2 KiB
Go
package metadata
|
|
|
|
import (
|
|
"github.com/coredns/coredns/core/dnsserver"
|
|
"github.com/coredns/coredns/plugin"
|
|
|
|
"github.com/mholt/caddy"
|
|
)
|
|
|
|
func init() {
|
|
caddy.RegisterPlugin("metadata", caddy.Plugin{
|
|
ServerType: "dns",
|
|
Action: setup,
|
|
})
|
|
}
|
|
|
|
func setup(c *caddy.Controller) error {
|
|
m, err := metadataParse(c)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
dnsserver.GetConfig(c).AddPlugin(func(next plugin.Handler) plugin.Handler {
|
|
m.Next = next
|
|
return m
|
|
})
|
|
|
|
c.OnStartup(func() error {
|
|
plugins := dnsserver.GetConfig(c).Handlers()
|
|
for _, p := range plugins {
|
|
if met, ok := p.(Provider); ok {
|
|
m.Providers = append(m.Providers, met)
|
|
}
|
|
}
|
|
return nil
|
|
})
|
|
|
|
return nil
|
|
}
|
|
|
|
func metadataParse(c *caddy.Controller) (*Metadata, error) {
|
|
m := &Metadata{}
|
|
c.Next()
|
|
zones := c.RemainingArgs()
|
|
|
|
if len(zones) != 0 {
|
|
m.Zones = zones
|
|
for i := 0; i < len(m.Zones); i++ {
|
|
m.Zones[i] = plugin.Host(m.Zones[i]).Normalize()
|
|
}
|
|
} else {
|
|
m.Zones = make([]string, len(c.ServerBlockKeys))
|
|
for i := 0; i < len(c.ServerBlockKeys); i++ {
|
|
m.Zones[i] = plugin.Host(c.ServerBlockKeys[i]).Normalize()
|
|
}
|
|
}
|
|
|
|
if c.NextBlock() || c.Next() {
|
|
return nil, plugin.Error("metadata", c.ArgErr())
|
|
}
|
|
return m, nil
|
|
}
|