/
events.go
103 lines (80 loc) · 2.4 KB
/
events.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
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
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
package main
import (
"encoding/json"
"fmt"
"net/http"
"strings"
"github.com/lxc/lxd/lxd/events"
"github.com/lxc/lxd/lxd/response"
"github.com/lxc/lxd/shared/api"
"github.com/lxc/lxd/shared/ws"
)
var eventsCmd = APIEndpoint{
Path: "events",
Get: APIEndpointAction{Handler: eventsGet},
Post: APIEndpointAction{Handler: eventsPost},
}
type eventsServe struct {
req *http.Request
d *Daemon
}
func (r *eventsServe) Render(w http.ResponseWriter) error {
return eventsSocket(r.d, r.req, w)
}
func (r *eventsServe) String() string {
return "event handler"
}
func eventsSocket(d *Daemon, r *http.Request, w http.ResponseWriter) error {
typeStr := r.FormValue("type")
if typeStr == "" {
// We add 'config' here to allow listeners on /dev/lxd/sock to receive config changes.
typeStr = "logging,operation,lifecycle,config"
}
var listenerConnection events.EventListenerConnection
// If the client has not requested a websocket connection then fallback to long polling event stream mode.
if r.Header.Get("Upgrade") == "websocket" {
// Upgrade the connection to websocket
conn, err := ws.Upgrader.Upgrade(w, r, nil)
if err != nil {
return err
}
defer func() { _ = conn.Close() }() // Ensure listener below ends when this function ends.
listenerConnection = events.NewWebsocketListenerConnection(conn)
} else {
h, ok := w.(http.Hijacker)
if !ok {
return fmt.Errorf("Missing implemented http.Hijacker interface")
}
conn, _, err := h.Hijack()
if err != nil {
return err
}
defer func() { _ = conn.Close() }() // Ensure listener below ends when this function ends.
listenerConnection, err = events.NewStreamListenerConnection(conn)
if err != nil {
return err
}
}
// As we don't know which project we are in, subscribe to events from all projects.
listener, err := d.events.AddListener("", true, listenerConnection, strings.Split(typeStr, ","), nil, nil, nil)
if err != nil {
return err
}
listener.Wait(r.Context())
return nil
}
func eventsGet(d *Daemon, r *http.Request) response.Response {
return &eventsServe{req: r, d: d}
}
func eventsPost(d *Daemon, r *http.Request) response.Response {
var event api.Event
err := json.NewDecoder(r.Body).Decode(&event)
if err != nil {
return response.InternalError(err)
}
err = d.events.Send("", event.Type, event.Metadata)
if err != nil {
return response.InternalError(err)
}
return response.SyncResponse(true, nil)
}