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
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
|
package slogslack
import (
"context"
"time"
"log/slog"
slogcommon "github.com/samber/slog-common"
"github.com/slack-go/slack"
)
type Option struct {
// log level (default: debug)
Level slog.Leveler
// slack webhook url
WebhookURL string
// slack bot token
BotToken string
// slack channel (default: webhook channel)
Channel string
// bot username (default: webhook username)
Username string
// bot emoji (default: webhook emoji)
IconEmoji string
// bot emoji (default: webhook emoji)
IconURL string
// API request timeout (default: 10s)
Timeout time.Duration
// optional: customize Slack message builder
Converter Converter
// optional: see slog.HandlerOptions
AddSource bool
ReplaceAttr func(groups []string, a slog.Attr) slog.Attr
}
func (o Option) NewSlackHandler() slog.Handler {
if o.Level == nil {
o.Level = slog.LevelDebug
}
if o.WebhookURL == "" && o.BotToken == "" {
panic("missing Slack webhook url and bot token")
}
if o.Timeout == 0 {
o.Timeout = 10 * time.Second
}
if o.Converter == nil {
o.Converter = DefaultConverter
}
return &SlackHandler{
option: o,
attrs: []slog.Attr{},
groups: []string{},
}
}
var _ slog.Handler = (*SlackHandler)(nil)
type SlackHandler struct {
option Option
attrs []slog.Attr
groups []string
}
func (h *SlackHandler) Enabled(_ context.Context, level slog.Level) bool {
return level >= h.option.Level.Level()
}
func (h *SlackHandler) Handle(ctx context.Context, record slog.Record) error {
message := h.option.Converter(h.option.AddSource, h.option.ReplaceAttr, h.attrs, h.groups, &record)
if h.option.Channel != "" {
message.Channel = h.option.Channel
}
if h.option.Username != "" {
message.Username = h.option.Username
}
if h.option.IconEmoji != "" {
message.IconEmoji = h.option.IconEmoji
}
if h.option.IconURL != "" {
message.IconURL = h.option.IconURL
}
if ts := contextThreadTimestamp(ctx); ts != "" {
message.ThreadTimestamp = ts
if contextReplyBroadcast(ctx) {
message.ReplyBroadcast = true
}
}
// non-blocking
go func() {
_ = h.postMessage(ctx, message)
}()
return nil
}
func (h *SlackHandler) WithAttrs(attrs []slog.Attr) slog.Handler {
return &SlackHandler{
option: h.option,
attrs: slogcommon.AppendAttrsToGroup(h.groups, h.attrs, attrs...),
groups: h.groups,
}
}
func (h *SlackHandler) WithGroup(name string) slog.Handler {
// https://cs.opensource.google/go/x/exp/+/46b07846:slog/handler.go;l=247
if name == "" {
return h
}
return &SlackHandler{
option: h.option,
attrs: h.attrs,
groups: append(h.groups, name),
}
}
func (h *SlackHandler) postMessage(ctx context.Context, message *slack.WebhookMessage) error {
ctx, cancel := context.WithTimeout(ctx, h.option.Timeout)
defer cancel()
if h.option.WebhookURL != "" {
return slack.PostWebhookContext(ctx, h.option.WebhookURL, message)
}
options := []slack.MsgOption{
slack.MsgOptionText(message.Text, true),
slack.MsgOptionAttachments(message.Attachments...),
slack.MsgOptionUsername(message.Username),
slack.MsgOptionIconURL(message.IconURL),
slack.MsgOptionIconEmoji(message.IconEmoji),
}
if message.ThreadTimestamp != "" {
options = append(options, slack.MsgOptionTS(message.ThreadTimestamp))
}
if message.ReplyBroadcast {
options = append(options, slack.MsgOptionBroadcast())
}
_, _, err := slack.New(h.option.BotToken).PostMessageContext(ctx, message.Channel, options...)
return err
}
|
