65 lines
1.7 KiB
Go
65 lines
1.7 KiB
Go
package alerts
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import (
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"bytes"
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"context"
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"encoding/json"
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"errors"
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"fmt"
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"io"
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"net/http"
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"time"
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"git.cer.sh/axodouble/quptime/internal/config"
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)
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// discordTimeout caps how long a single webhook POST is allowed to
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// take.
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const discordTimeout = 10 * time.Second
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// discordPayload is the minimum shape the Discord webhook API
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// accepts. We do not use embeds — plain text keeps the payload
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// trivial to read in operator-side logs.
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type discordPayload struct {
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Content string `json:"content"`
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}
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// sendDiscord posts msg.Subject + body to the configured webhook URL.
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// When the alert has a custom BodyTemplate, the rendered body is shipped
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// verbatim — the operator has opted out of the default subject header
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// and code-block wrapping in favour of their own formatting.
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func sendDiscord(a *config.Alert, msg Message) error {
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if a.DiscordWebhook == "" {
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return errors.New("discord webhook url not set")
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}
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var content string
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if a.BodyTemplate != "" {
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content = msg.Body
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} else {
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content = msg.Subject + "\n```\n" + msg.Body + "\n```"
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}
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raw, err := json.Marshal(discordPayload{Content: content})
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if err != nil {
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return err
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}
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ctx, cancel := context.WithTimeout(context.Background(), discordTimeout)
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defer cancel()
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req, err := http.NewRequestWithContext(ctx, http.MethodPost, a.DiscordWebhook, bytes.NewReader(raw))
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if err != nil {
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return err
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}
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req.Header.Set("Content-Type", "application/json")
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resp, err := http.DefaultClient.Do(req)
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if err != nil {
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return fmt.Errorf("discord webhook: %w", err)
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}
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defer resp.Body.Close()
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if resp.StatusCode >= 300 {
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body, _ := io.ReadAll(io.LimitReader(resp.Body, 4096))
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return fmt.Errorf("discord webhook status %d: %s", resp.StatusCode, string(body))
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}
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return nil
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}
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