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* Add ForwardEmail one-click SMTP form option. * Add bounce webhook integration. --------- Co-authored-by: Kailash Nadh <kailash@nadh.in>
87 lines
2.3 KiB
Go
87 lines
2.3 KiB
Go
package webhooks
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import (
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"crypto/hmac"
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"crypto/sha256"
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"crypto/subtle"
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"encoding/json"
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"fmt"
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"strings"
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"time"
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"github.com/knadh/listmonk/models"
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)
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type BounceDetails struct {
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Action string `json:"action"`
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Message string `json:"message"`
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Category string `json:"category"`
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Code int `json:"code"`
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Status string `json:"status"`
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Line int `json:"line"`
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}
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type forwardemailNotif struct {
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EmailID string `json:"email_id"`
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ListID string `json:"list_id"`
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ListUnsubscribe string `json:"list_unsubscribe"`
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FeedbackID string `json:"feedback_id"`
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Recipient string `json:"recipient"`
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Message string `json:"message"`
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Response string `json:"response"`
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ResponseCode int `json:"response_code"`
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TruthSource string `json:"truth_source"`
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Headers map[string]string `json:"headers"`
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Bounce BounceDetails `json:"bounce"`
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BouncedAt time.Time `json:"bounced_at"`
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}
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// Forwardemail handles webhook notifications (mainly bounce notifications).
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type Forwardemail struct {
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hmacKey []byte
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}
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func NewForwardemail(key []byte) *Forwardemail {
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return &Forwardemail{hmacKey: key}
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}
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// ProcessBounce processes Forward Email bounce notifications and returns one object.
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func (p *Forwardemail) ProcessBounce(sig, b []byte) ([]models.Bounce, error) {
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key := []byte(p.hmacKey)
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mac := hmac.New(sha256.New, key)
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mac.Write(b)
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signature := mac.Sum(nil)
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if subtle.ConstantTimeCompare(signature, []byte(sig)) != 1 {
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return nil, fmt.Errorf("invalid signature")
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}
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var n forwardemailNotif
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if err := json.Unmarshal(b, &n); err != nil {
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return nil, fmt.Errorf("error unmarshalling Forwardemail notification: %v", err)
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}
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typ := models.BounceTypeSoft
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// TODO: support `typ = models.BounceTypeComplaint` in future
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switch n.Bounce.Category {
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case "block", "recipient", "virus", "spam":
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typ = models.BounceTypeHard
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}
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campUUID := ""
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if v, ok := n.Headers["X-Listmonk-Campaign"]; ok {
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campUUID = v
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}
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return []models.Bounce{{
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Email: strings.ToLower(n.Recipient),
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CampaignUUID: campUUID,
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Type: typ,
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Source: "forwardemail",
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Meta: json.RawMessage(b),
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CreatedAt: n.BouncedAt,
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}}, nil
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}
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