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
104
105
106
107
108
109
|
// SPDX-License-Identifier: GPL-3.0-or-later
package supervisord
import (
"context"
"errors"
"fmt"
"net"
"net/http"
"net/url"
"strings"
"github.com/mattn/go-xmlrpc"
)
type supervisorRPCClient struct {
client *xmlrpc.Client
}
func newSupervisorRPCClient(serverURL *url.URL, httpClient *http.Client) (supervisorClient, error) {
switch serverURL.Scheme {
case "http", "https":
c := xmlrpc.NewClient(serverURL.String())
c.HttpClient = httpClient
return &supervisorRPCClient{client: c}, nil
case "unix":
c := xmlrpc.NewClient("http://unix/RPC2")
t, ok := httpClient.Transport.(*http.Transport)
if !ok {
return nil, errors.New("unexpected HTTP client transport")
}
t.DialContext = func(ctx context.Context, _, _ string) (net.Conn, error) {
d := net.Dialer{Timeout: httpClient.Timeout}
return d.DialContext(ctx, "unix", serverURL.Path)
}
c.HttpClient = httpClient
return &supervisorRPCClient{client: c}, nil
default:
return nil, fmt.Errorf("unexpected URL scheme: %s", serverURL)
}
}
// http://supervisord.org/api.html#process-control
type processStatus struct {
name string // name of the process.
group string // name of the process’ group.
start int // UNIX timestamp of when the process was started.
stop int // UNIX timestamp of when the process last ended, or 0 if the process has never been stopped.
now int // UNIX timestamp of the current time, which can be used to calculate process up-time.
state int // state code.
stateName string // string description of state.
exitStatus int // exit status (errorlevel) of process, or 0 if the process is still running.
}
func (c *supervisorRPCClient) getAllProcessInfo() ([]processStatus, error) {
const fn = "supervisor.getAllProcessInfo"
resp, err := c.client.Call(fn)
if err != nil {
return nil, fmt.Errorf("error on '%s' function call: %v", fn, err)
}
return parseGetAllProcessInfo(resp)
}
func (c *supervisorRPCClient) closeIdleConnections() {
c.client.HttpClient.CloseIdleConnections()
}
func parseGetAllProcessInfo(resp interface{}) ([]processStatus, error) {
arr, ok := resp.(xmlrpc.Array)
if !ok {
return nil, fmt.Errorf("unexpected response type, want=xmlrpc.Array, got=%T", resp)
}
var info []processStatus
for _, item := range arr {
s, ok := item.(xmlrpc.Struct)
if !ok {
continue
}
var p processStatus
for k, v := range s {
switch strings.ToLower(k) {
case "name":
p.name, _ = v.(string)
case "group":
p.group, _ = v.(string)
case "start":
p.start, _ = v.(int)
case "stop":
p.stop, _ = v.(int)
case "now":
p.now, _ = v.(int)
case "state":
p.state, _ = v.(int)
case "statename":
p.stateName, _ = v.(string)
case "exitstatus":
p.exitStatus, _ = v.(int)
}
}
if p.name != "" && p.group != "" && p.stateName != "" {
info = append(info, p)
}
}
return info, nil
}
|
