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yaskinny wants to merge 2 commits into from
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Add discord message fields #3821

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04d4582
Feat(discord):
yaskinny Apr 26, 2024
85d44df
Chore(discord):
yaskinny Apr 26, 2024
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7 changes: 5 additions & 2 deletions config/notifiers.go
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Original file line number Diff line number Diff line change
Expand Up @@ -220,8 +220,11 @@ type DiscordConfig struct {
WebhookURL *SecretURL `yaml:"webhook_url,omitempty" json:"webhook_url,omitempty"`
WebhookURLFile string `yaml:"webhook_url_file,omitempty" json:"webhook_url_file,omitempty"`

Title string `yaml:"title,omitempty" json:"title,omitempty"`
Message string `yaml:"message,omitempty" json:"message,omitempty"`
Title string `yaml:"title,omitempty" json:"title,omitempty"`
Message string `yaml:"message,omitempty" json:"message,omitempty"`
Content string `yaml:"content,omitempty" json:"content,omitempty"`
AvatarURL string `yaml:"avatar_url,omitempty" json:"avatar_url,omitempty"`
Username string `yaml:"username,omitempty" json:"username,omitempty"`
}

// UnmarshalYAML implements the yaml.Unmarshaler interface.
Expand Down
41 changes: 35 additions & 6 deletions notify/discord/discord.go
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Original file line number Diff line number Diff line change
Expand Up @@ -19,6 +19,7 @@ import (
"encoding/json"
"fmt"
"net/http"
"net/url"
"os"
"strings"

Expand All @@ -38,6 +39,8 @@ const (
maxTitleLenRunes = 256
// https://discord.com/developers/docs/resources/channel#embed-object-embed-limits - 4096 characters or runes.
maxDescriptionLenRunes = 4096

maxContentLenRunes = 2000
)

const (
Expand Down Expand Up @@ -74,8 +77,10 @@ func New(c *config.DiscordConfig, t *template.Template, l log.Logger, httpOpts .
}

type webhook struct {
Content string `json:"content"`
Embeds []webhookEmbed `json:"embeds"`
Username string `json:"username,omitempty"`
AvatarURL string `json:"avatar_url,omitempty"`
Content string `json:"content"`
Embeds []webhookEmbed `json:"embeds"`
}

type webhookEmbed struct {
Expand Down Expand Up @@ -115,6 +120,14 @@ func (n *Notifier) Notify(ctx context.Context, as ...*types.Alert) (bool, error)
level.Warn(n.logger).Log("msg", "Truncated message", "key", key, "max_runes", maxDescriptionLenRunes)
}

content, truncated := notify.TruncateInRunes(tmpl(n.conf.Content), maxContentLenRunes)
if err != nil {
return false, err
}
if truncated {
level.Warn(n.logger).Log("msg", "Truncated message", "key", key, "max_runes", maxContentLenRunes)
}

color := colorGrey
if alerts.Status() == model.AlertFiring {
color = colorRed
Expand All @@ -123,15 +136,15 @@ func (n *Notifier) Notify(ctx context.Context, as ...*types.Alert) (bool, error)
color = colorGreen
}

var url string
var whURL string
if n.conf.WebhookURL != nil {
url = n.conf.WebhookURL.String()
whURL = n.conf.WebhookURL.String()
} else {
content, err := os.ReadFile(n.conf.WebhookURLFile)
if err != nil {
return false, fmt.Errorf("read webhook_url_file: %w", err)
}
url = strings.TrimSpace(string(content))
whURL = strings.TrimSpace(string(content))
}

w := webhook{
Expand All @@ -142,12 +155,28 @@ func (n *Notifier) Notify(ctx context.Context, as ...*types.Alert) (bool, error)
}},
}

if len(content) != 0 {
w.Content = content
}

if len(n.conf.Username) != 0 {
w.Username = n.conf.Username
}

if len(n.conf.AvatarURL) != 0 {
if _, err := url.Parse(n.conf.AvatarURL); err == nil {
w.AvatarURL = n.conf.AvatarURL
} else {
level.Warn(n.logger).Log("msg", "Bad avatar url", "key", key)
}
}

var payload bytes.Buffer
if err = json.NewEncoder(&payload).Encode(w); err != nil {
return false, err
}

resp, err := notify.PostJSON(ctx, n.client, url, &payload)
resp, err := notify.PostJSON(ctx, n.client, whURL, &payload)
if err != nil {
return true, notify.RedactURL(err)
}
Expand Down