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// Copyright 2024 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package sender
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import (
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"fmt"
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"hash/fnv"
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"net/mail"
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"strings"
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"time"
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"code.gitea.io/gitea/modules/base"
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"code.gitea.io/gitea/modules/log"
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"code.gitea.io/gitea/modules/setting"
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"github.com/jaytaylor/html2text"
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gomail "github.com/wneessen/go-mail"
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)
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// Message mail body and log info
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type Message struct {
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Info string // Message information for log purpose.
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FromAddress string
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FromDisplayName string
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To string // Use only one recipient to prevent leaking of addresses
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ReplyTo string
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Subject string
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Date time.Time
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Body string
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Headers map[string][]string
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}
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// ToMessage converts a Message to gomail.Message
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func (m *Message) ToMessage() *gomail.Msg {
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msg := gomail.NewMsg()
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addr := mail.Address{Name: m.FromDisplayName, Address: m.FromAddress}
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_ = msg.SetAddrHeader("From", addr.String())
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_ = msg.SetAddrHeader("To", m.To)
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if m.ReplyTo != "" {
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msg.SetGenHeader("Reply-To", m.ReplyTo)
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}
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for header := range m.Headers {
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msg.SetGenHeader(gomail.Header(header), m.Headers[header]...)
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}
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if setting.MailService.SubjectPrefix != "" {
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msg.SetGenHeader("Subject", setting.MailService.SubjectPrefix+" "+m.Subject)
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} else {
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msg.SetGenHeader("Subject", m.Subject)
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}
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msg.SetDateWithValue(m.Date)
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msg.SetGenHeader("X-Auto-Response-Suppress", "All")
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plainBody, err := html2text.FromString(m.Body)
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if err != nil || setting.MailService.SendAsPlainText {
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if strings.Contains(base.TruncateString(m.Body, 100), "<html>") {
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log.Warn("Mail contains HTML but configured to send as plain text.")
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}
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msg.SetBodyString("text/plain", plainBody)
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} else {
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msg.SetBodyString("text/plain", plainBody)
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msg.AddAlternativeString("text/html", m.Body)
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}
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if len(msg.GetGenHeader("Message-ID")) == 0 {
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msg.SetGenHeader("Message-ID", m.generateAutoMessageID())
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}
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for k, v := range setting.MailService.OverrideHeader {
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if len(msg.GetGenHeader(gomail.Header(k))) != 0 {
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log.Debug("Mailer override header '%s' as per config", k)
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}
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msg.SetGenHeader(gomail.Header(k), v...)
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}
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return msg
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}
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// SetHeader adds additional headers to a message
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func (m *Message) SetHeader(field string, value ...string) {
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m.Headers[field] = value
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}
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func (m *Message) generateAutoMessageID() string {
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dateMs := m.Date.UnixNano() / 1e6
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h := fnv.New64()
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if len(m.To) > 0 {
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_, _ = h.Write([]byte(m.To))
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}
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_, _ = h.Write([]byte(m.Subject))
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_, _ = h.Write([]byte(m.Body))
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return fmt.Sprintf("<autogen-%d-%016x@%s>", dateMs, h.Sum64(), setting.Domain)
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}
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// NewMessageFrom creates new mail message object with custom From header.
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func NewMessageFrom(to, fromDisplayName, fromAddress, subject, body string) *Message {
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log.Trace("NewMessageFrom (body):\n%s", body)
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return &Message{
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FromAddress: fromAddress,
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FromDisplayName: fromDisplayName,
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To: to,
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Subject: subject,
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Date: time.Now(),
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Body: body,
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Headers: map[string][]string{},
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}
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}
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// NewMessage creates new mail message object with default From header.
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func NewMessage(to, subject, body string) *Message {
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return NewMessageFrom(to, setting.MailService.FromName, setting.MailService.FromEmail, subject, body)
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}
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