forked from st3v/go-plugins
/
uuid.go
43 lines (34 loc) · 831 Bytes
/
uuid.go
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
// Package uuid is a micro plugin for adding a trace header
package uuid
import (
"net/http"
"github.com/micro/cli"
"github.com/micro/micro/plugin"
"github.com/pborman/uuid"
)
type uuidPlugin struct{}
func (u *uuidPlugin) Flags() []cli.Flag {
return nil
}
func (u *uuidPlugin) Commands() []cli.Command {
return nil
}
func (u *uuidPlugin) Handler() plugin.Handler {
return func(h http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
if td := r.Header.Get("X-Micro-Trace-Id"); len(td) == 0 {
r.Header.Set("X-Micro-Trace-Id", uuid.NewUUID().String())
}
h.ServeHTTP(w, r)
})
}
}
func (u *uuidPlugin) Init(ctx *cli.Context) error {
return nil
}
func (u *uuidPlugin) String() string {
return "uuid"
}
func New() plugin.Plugin {
return new(uuidPlugin)
}