dsh
3a4636c2c5
根因：backendutil.FetchBodyStructure 对部分消息返回 nil（典型场景： - message/rfc822 附件为 base64 编码时库内不解码，把编码文本当嵌套 消息头解析报错（转发邮件场景，如 .mail-monitor/forward.py 转发） - multipart 缺少结束边界（截断）时 extended 解析报错） buildIMAPMessage 未处理 nil，go-imap 格式化 FETCH 响应时在 send() 协程 nil 指针解引用 panic，连接中断——Thunderbird 只取到崩溃前已 发送的几封邮件，手机客户端一直卡在"正在获取邮件"。 修复： - BodyStructure 解析失败时降级为 text/plain 单段结构，杜绝 nil - FetchBodySection 返回 nil 时跳过该 section，不再写入 nil literal - 新增集成测试 TestFetchBodyMalformedMIME 覆盖两类畸形 MIME
1076 lines
30 KiB
Go
1076 lines
30 KiB
Go
package imap_server
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import (
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"bufio"
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"bytes"
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"fmt"
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"io"
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"log"
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"net/mail"
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"strings"
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"time"
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"mail_go/config"
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"mail_go/internal/connhub"
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"mail_go/internal/db"
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"mail_go/internal/mailutil"
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"mail_go/internal/store"
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"github.com/emersion/go-imap"
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"github.com/emersion/go-imap/backend"
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"github.com/emersion/go-imap/backend/backendutil"
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asgomail "github.com/emersion/go-message/mail"
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"github.com/emersion/go-message/textproto"
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)
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// ---------- imapBackend ----------
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// imapBackend implements backend.Backend and backend.BackendUpdater.
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type imapBackend struct {
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stores *store.Stores
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banCfg config.BanConfig
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port int
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hub *connhub.Hub
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// updates 承载新邮件等后端更新，由 go-imap 服务器广播给相关客户端。
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updates chan backend.Update
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// disconnectAddr 强制断开指定远端地址的连接（管理后台断开封禁用）。
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disconnectAddr func(addr string)
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}
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// Updates 实现 backend.BackendUpdater：新邮件推送通道（广播按用户名与
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// 邮箱过滤，只送达已选中对应邮箱的客户端）。
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func (b *imapBackend) Updates() <-chan backend.Update {
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return b.updates
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}
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// buildNewMessageUpdate 为一条新投递到 mailbox 的邮件构造 IMAP 更新。
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// seq 取该邮件在邮箱中的实际序号（最新在前，通常为 1）。
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func buildNewMessageUpdate(stores *store.Stores, userEmail, mailbox string, msg *db.Message) *backend.MessageUpdate {
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if stores == nil || msg == nil || userEmail == "" || mailbox == "" {
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return nil
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}
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seq := seqOf(stores, msg.UserID, mailbox, msg.ID)
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if seq == 0 {
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seq = 1
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}
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imapMsg := imap.NewMessage(seq, []imap.FetchItem{imap.FetchUid, imap.FetchFlags, imap.FetchInternalDate, imap.FetchRFC822Size, imap.FetchEnvelope})
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imapMsg.Uid = uint32(msg.ID)
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imapMsg.Flags = flagsOf(msg.IsRead, msg.IsFlagged, false)
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imapMsg.InternalDate = msg.Date
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imapMsg.Size = uint32(len(msg.RawData))
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imapMsg.Envelope = &imap.Envelope{
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Date: msg.Date,
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Subject: msg.Subject,
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From: parseAddressList(msg.FromAddr),
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Sender: parseAddressList(msg.FromAddr),
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ReplyTo: parseAddressList(msg.FromAddr),
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To: parseAddressList(msg.ToAddr),
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Cc: parseAddressList(msg.CcAddr),
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MessageId: msg.MessageID,
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}
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return &backend.MessageUpdate{
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Update: backend.NewUpdate(userEmail, mailbox),
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Message: imapMsg,
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}
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}
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// buildFlagsUpdate 为一条消息的标志变化构造 IMAP 更新（已读/星标/删除标记）。
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// deleted 为会话内 \Deleted 标记（IMAP STORE 会话状态，不入库）。
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func buildFlagsUpdate(stores *store.Stores, userEmail, mailbox string, msg *db.Message, deleted bool) *backend.MessageUpdate {
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if stores == nil || msg == nil || userEmail == "" || mailbox == "" {
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return nil
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}
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imapMsg := imap.NewMessage(seqOf(stores, msg.UserID, mailbox, msg.ID),
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[]imap.FetchItem{imap.FetchUid, imap.FetchFlags})
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imapMsg.Uid = uint32(msg.ID)
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imapMsg.Flags = flagsOf(msg.IsRead, msg.IsFlagged, deleted)
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return &backend.MessageUpdate{
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Update: backend.NewUpdate(userEmail, mailbox),
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Message: imapMsg,
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}
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}
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// seqOf 返回消息在文件夹中的序号（1 基），未找到返回 0。
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func seqOf(stores *store.Stores, userID uint, mailbox string, msgID uint) uint32 {
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msgs, err := stores.Mails.ListAllByUserAndFolder(userID, mailbox)
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if err != nil {
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return 0
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}
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for i := range msgs {
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if msgs[i].ID == msgID {
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return uint32(i + 1)
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}
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}
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return 0
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}
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// flagsOf 按数据库状态生成 IMAP 标志列表（deleted 为会话内 \Deleted 标记）。
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func flagsOf(read, flagged, deleted bool) []string {
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flags := make([]string, 0, 3)
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if read {
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flags = append(flags, "\\Seen")
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}
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if flagged {
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flags = append(flags, "\\Flagged")
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}
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if deleted {
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flags = append(flags, "\\Deleted")
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}
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return flags
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}
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// pushUpdate 非阻塞地把一条后端更新送入推送通道（满则丢弃并记日志）。
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func pushUpdate(ch chan backend.Update, u backend.Update) {
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if ch == nil {
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return
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}
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select {
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case ch <- u:
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default:
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log.Printf("IMAP: 推送通道已满，丢弃更新")
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}
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}
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// Login authenticates a user by email and password.
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func (b *imapBackend) Login(connInfo *imap.ConnInfo, username, password string) (backend.User, error) {
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clientIP := store.ClientIPFromAddr(connInfo.RemoteAddr)
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now := time.Now()
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// 已封禁 IP 一律拒绝认证（防协议层暴力破解）
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if banned, _ := b.stores.Bans.IsBanned(clientIP); banned {
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b.recordLogin(clientIP, username, false, "IP已被封禁", "认证被拒绝（IP 已封禁）", 0, now)
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return nil, backend.ErrInvalidCredentials
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}
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user, err := b.stores.Users.Authenticate(username, password)
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if err != nil {
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// 认证失败计数，达到阈值按档位封禁（与 Web 登录共用 ban_entries）
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b.stores.RecordAuthFailure(clientIP, b.banCfg.MaxFailAttempts, b.banCfg.BanDurationMin, "邮件协议认证失败次数过多")
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b.recordLogin(clientIP, username, false, "用户名或密码错误", "LOGIN 失败", 0, now)
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return nil, fmt.Errorf("invalid credentials: %w", err)
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}
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email := user.Username + "@"
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domain, err := b.stores.Domains.GetByID(user.DomainID)
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if err == nil {
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email = user.Username + "@" + domain.Name
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}
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logID := b.recordLogin(clientIP, username, true, "", "LOGIN 成功", 0, now)
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// 连接追踪：注册到当前连接中心，Logout 时注销；
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// 注册强制断开回调（按远端地址匹配，断开时由 go-imap 走正常收尾）。
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conn := b.hub.Register("imap", clientIP, b.port, connInfo.TLS != nil)
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if conn != nil {
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conn.SetUser(email)
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remoteAddr := ""
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if connInfo.RemoteAddr != nil {
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remoteAddr = connInfo.RemoteAddr.String()
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}
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if b.disconnectAddr != nil && remoteAddr != "" {
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addr := remoteAddr
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conn.SetDisconnect(func() { b.disconnectAddr(addr) })
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}
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}
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return &imapUser{
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stores: b.stores,
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id: user.ID,
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email: email,
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logID: logID,
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clientIP: clientIP,
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startedAt: now,
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conn: conn,
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updates: b.updates,
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}, nil
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}
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// recordLogin 写入一条 IMAP 登录日志，返回新记录的 ID（失败时为 0）。
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func (b *imapBackend) recordLogin(ip, username string, success bool, failReason, detail string, durationMs int64, at time.Time) uint {
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entry := &db.ProtocolLog{
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Protocol: db.ProtocolIMAP,
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Port: b.port,
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ClientIP: ip,
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Username: username,
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Success: success,
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FailReason: failReason,
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Detail: detail,
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DurationMs: durationMs,
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CreatedAt: at,
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}
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if err := b.stores.ProtocolLogs.Create(entry); err != nil {
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log.Printf("IMAP: 写入协议日志失败: %v", err)
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return 0
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}
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return entry.ID
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}
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// ---------- imapUser ----------
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// imapUser implements backend.User.
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type imapUser struct {
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stores *store.Stores
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id uint
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email string
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logID uint
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clientIP string
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startedAt time.Time
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conn *connhub.Conn
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// updates 所在 backend 的推送通道（STORE/EXPUNGE 等实时同步用）。
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updates chan backend.Update
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}
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// Username returns the user's email address.
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func (u *imapUser) Username() string {
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return u.email
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}
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// ListMailboxes returns the standard mailbox list.
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func (u *imapUser) ListMailboxes(subscribed bool) ([]backend.Mailbox, error) {
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folders := []struct {
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name string
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delimiter string
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attributes []string
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}{
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{"INBOX", "/", nil},
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{"Sent", "/", []string{"\\Sent"}},
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{"Drafts", "/", []string{"\\Drafts"}},
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{"Trash", "/", []string{"\\Trash"}},
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}
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mailboxes := make([]backend.Mailbox, 0, len(folders))
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for _, f := range folders {
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mailboxes = append(mailboxes, &imapMailbox{
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stores: u.stores,
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user: u,
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name: f.name,
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delimiter: f.delimiter,
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attributes: f.attributes,
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})
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}
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return mailboxes, nil
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}
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// GetMailbox returns a mailbox by name.
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func (u *imapUser) GetMailbox(name string) (backend.Mailbox, error) {
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normalized, ok := canonicalMailboxName(name)
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if !ok {
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return nil, backend.ErrNoSuchMailbox
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}
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|
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return &imapMailbox{
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stores: u.stores,
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user: u,
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name: normalized,
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delimiter: "/",
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}, nil
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}
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func canonicalMailboxName(name string) (string, bool) {
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switch strings.ToUpper(strings.TrimSpace(name)) {
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case "INBOX":
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return "INBOX", true
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case "SENT":
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return "Sent", true
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case "DRAFTS":
|
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return "Drafts", true
|
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case "TRASH":
|
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return "Trash", true
|
||
default:
|
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return "", false
|
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}
|
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}
|
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|
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// CreateMailbox creates a new mailbox (not supported in this version).
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func (u *imapUser) CreateMailbox(name string) error {
|
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return fmt.Errorf("mailbox creation not supported")
|
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}
|
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|
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// DeleteMailbox deletes a mailbox (not supported in this version).
|
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func (u *imapUser) DeleteMailbox(name string) error {
|
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return fmt.Errorf("mailbox deletion not supported")
|
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}
|
||
|
||
// RenameMailbox renames a mailbox (not supported in this version).
|
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func (u *imapUser) RenameMailbox(existingName, newName string) error {
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return fmt.Errorf("mailbox rename not supported")
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}
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// Logout is called when the user session ends.
|
||
func (u *imapUser) Logout() error {
|
||
// 回填会话时长，登录记录在 Login 时已写入
|
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if u.logID == 0 {
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return nil
|
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}
|
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durationMs := time.Since(u.startedAt).Milliseconds()
|
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if err := u.stores.ProtocolLogs.UpdateDuration(u.logID, durationMs); err != nil {
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log.Printf("IMAP: 更新协议日志失败: %v", err)
|
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}
|
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u.conn.Close()
|
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return nil
|
||
}
|
||
|
||
// ---------- imapMailbox ----------
|
||
|
||
// imapMailbox implements backend.Mailbox.
|
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type imapMailbox struct {
|
||
stores *store.Stores
|
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user *imapUser
|
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name string
|
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delimiter string
|
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attributes []string
|
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// deleted tracks messages marked as \Deleted in this session
|
||
deleted map[uint]bool
|
||
}
|
||
|
||
// Name returns the mailbox name.
|
||
func (m *imapMailbox) Name() string {
|
||
return m.name
|
||
}
|
||
|
||
// Info returns mailbox metadata.
|
||
func (m *imapMailbox) Info() (*imap.MailboxInfo, error) {
|
||
attrs := m.attributes
|
||
if attrs == nil {
|
||
attrs = []string{}
|
||
}
|
||
return &imap.MailboxInfo{
|
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Name: m.name,
|
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Delimiter: m.delimiter,
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Attributes: attrs,
|
||
}, nil
|
||
}
|
||
|
||
// Status returns mailbox status information.
|
||
func (m *imapMailbox) Status(items []imap.StatusItem) (*imap.MailboxStatus, error) {
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||
status := imap.NewMailboxStatus(m.name, items)
|
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status.Flags = []string{"\\Answered", "\\Flagged", "\\Deleted", "\\Seen", "\\Draft"}
|
||
status.PermanentFlags = []string{"\\Answered", "\\Flagged", "\\Deleted", "\\Seen", "\\Draft", "\\*"}
|
||
|
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messages, err := m.stores.Mails.ListAllByUserAndFolder(m.user.id, m.name)
|
||
if err != nil {
|
||
return nil, err
|
||
}
|
||
|
||
status.Messages = uint32(len(messages))
|
||
|
||
var unseenCount uint32
|
||
for _, msg := range messages {
|
||
if !msg.IsRead {
|
||
unseenCount++
|
||
}
|
||
}
|
||
status.Unseen = unseenCount
|
||
status.Recent = 0
|
||
maxID, err := m.stores.Mails.MaxIDByUserAndFolder(m.user.id, m.name)
|
||
if err != nil {
|
||
return nil, err
|
||
}
|
||
status.UidNext = uint32(maxID + 1)
|
||
status.UidValidity = 1
|
||
|
||
return status, nil
|
||
}
|
||
|
||
// SetSubscribed sets the subscribed status (no-op for now).
|
||
func (m *imapMailbox) SetSubscribed(subscribed bool) error {
|
||
return nil
|
||
}
|
||
|
||
// Check is a no-op checkpoint.
|
||
func (m *imapMailbox) Check() error {
|
||
return nil
|
||
}
|
||
|
||
// ListMessages returns messages matching the sequence set and fetch items.
|
||
func (m *imapMailbox) ListMessages(uid bool, seqset *imap.SeqSet, items []imap.FetchItem, ch chan<- *imap.Message) error {
|
||
defer close(ch)
|
||
|
||
// Fetch all messages in this mailbox
|
||
dbMessages, err := m.stores.Mails.ListAllByUserAndFolder(m.user.id, m.name)
|
||
if err != nil {
|
||
return err
|
||
}
|
||
|
||
if len(dbMessages) == 0 {
|
||
return nil
|
||
}
|
||
|
||
// Build a mapping of sequence number (1-based) to db.Message
|
||
type seqEntry struct {
|
||
seqNum uint32
|
||
msg *db.Message
|
||
}
|
||
entries := make([]seqEntry, len(dbMessages))
|
||
for i := range dbMessages {
|
||
entries[i] = seqEntry{
|
||
seqNum: uint32(i + 1),
|
||
msg: &dbMessages[i],
|
||
}
|
||
}
|
||
|
||
for _, entry := range entries {
|
||
var match bool
|
||
if uid {
|
||
match = seqset.Contains(uint32(entry.msg.ID))
|
||
} else {
|
||
match = seqset.Contains(entry.seqNum)
|
||
}
|
||
if !match {
|
||
continue
|
||
}
|
||
|
||
imapMsg, err := m.buildIMAPMessage(entry.msg, entry.seqNum, items)
|
||
if err != nil {
|
||
log.Printf("IMAP: error building message %d: %v", entry.msg.ID, err)
|
||
continue
|
||
}
|
||
ch <- imapMsg
|
||
}
|
||
|
||
return nil
|
||
}
|
||
|
||
// buildIMAPMessage constructs an imap.Message from a db.Message with the requested items.
|
||
func (m *imapMailbox) buildIMAPMessage(dbMsg *db.Message, seqNum uint32, items []imap.FetchItem) (*imap.Message, error) {
|
||
imapMsg := imap.NewMessage(seqNum, items)
|
||
imapMsg.Uid = uint32(dbMsg.ID)
|
||
imapMsg.Flags = m.getMessageFlags(dbMsg)
|
||
imapMsg.InternalDate = dbMsg.Date
|
||
|
||
rawMsg := messageRawData(dbMsg)
|
||
imapMsg.Size = uint32(len(rawMsg))
|
||
|
||
for _, item := range items {
|
||
switch item {
|
||
case imap.FetchUid, imap.FetchFlags, imap.FetchInternalDate, imap.FetchRFC822Size:
|
||
continue
|
||
case imap.FetchEnvelope:
|
||
hdr, _, err := headerAndBody(rawMsg)
|
||
if err == nil {
|
||
imapMsg.Envelope, _ = backendutil.FetchEnvelope(hdr)
|
||
}
|
||
if imapMsg.Envelope == nil {
|
||
imapMsg.Envelope = m.buildEnvelope(dbMsg)
|
||
}
|
||
case imap.FetchBody, imap.FetchBodyStructure:
|
||
hdr, body, err := headerAndBody(rawMsg)
|
||
if err == nil {
|
||
imapMsg.BodyStructure, _ = backendutil.FetchBodyStructure(hdr, body, item == imap.FetchBodyStructure)
|
||
}
|
||
// 防御：FetchBodyStructure 对部分合法/畸形 MIME 会失败并返回
|
||
// nil（典型：message/rfc822 附件为 base64 编码时库内不解码
|
||
// 直接按嵌套消息解析头；或 multipart 边界截断）。BodyStructure
|
||
// 为 nil 时 go-imap 格式化 FETCH 响应会在 send() 协程 panic
|
||
// （nil 指针解引用），连接中断导致客户端只收到部分邮件甚至
|
||
// 一直卡在同步。解析失败时降级为 text/plain 单段结构。
|
||
if imapMsg.BodyStructure == nil {
|
||
imapMsg.BodyStructure = fallbackBodyStructure(rawMsg)
|
||
}
|
||
default:
|
||
section, err := imap.ParseBodySectionName(item)
|
||
if err != nil {
|
||
continue
|
||
}
|
||
hdr, body, err := headerAndBody(rawMsg)
|
||
if err != nil {
|
||
return nil, err
|
||
}
|
||
literal, _ := backendutil.FetchBodySection(hdr, body, section)
|
||
if literal != nil {
|
||
imapMsg.Body[section] = literal
|
||
}
|
||
}
|
||
}
|
||
|
||
return imapMsg, nil
|
||
}
|
||
|
||
// fallbackBodyStructure 构造一个 text/plain 单段 BodyStructure，用于
|
||
// MIME 解析失败的消息（保证 FETCH BODY/BODYSTRUCTURE 不因 nil 崩溃）。
|
||
func fallbackBodyStructure(raw []byte) *imap.BodyStructure {
|
||
size := uint32(len(raw))
|
||
lines := uint32(bytes.Count(raw, []byte{'\n'}))
|
||
if len(raw) > 0 && raw[len(raw)-1] != '\n' {
|
||
lines++
|
||
}
|
||
return &imap.BodyStructure{
|
||
MIMEType: "text",
|
||
MIMESubType: "plain",
|
||
Params: map[string]string{"charset": "utf-8"},
|
||
Encoding: "8bit",
|
||
Size: size,
|
||
Lines: lines,
|
||
}
|
||
}
|
||
|
||
func messageRawData(msg *db.Message) []byte {
|
||
if msg.RawData != "" {
|
||
return []byte(msg.RawData)
|
||
}
|
||
return buildRawMessage(msg)
|
||
}
|
||
|
||
func headerAndBody(raw []byte) (textproto.Header, io.Reader, error) {
|
||
body := bufio.NewReader(bytes.NewReader(raw))
|
||
hdr, err := textproto.ReadHeader(body)
|
||
return hdr, body, err
|
||
}
|
||
|
||
// getMessageFlags returns IMAP flags for a database message.
|
||
func (m *imapMailbox) getMessageFlags(dbMsg *db.Message) []string {
|
||
flags := make([]string, 0)
|
||
if dbMsg.IsRead {
|
||
flags = append(flags, "\\Seen")
|
||
}
|
||
if dbMsg.IsFlagged {
|
||
flags = append(flags, "\\Flagged")
|
||
}
|
||
if m.deleted != nil && m.deleted[dbMsg.ID] {
|
||
flags = append(flags, "\\Deleted")
|
||
}
|
||
return flags
|
||
}
|
||
|
||
// buildEnvelope constructs an imap.Envelope from a db.Message.
|
||
func (m *imapMailbox) buildEnvelope(dbMsg *db.Message) *imap.Envelope {
|
||
env := &imap.Envelope{
|
||
Date: dbMsg.Date,
|
||
Subject: dbMsg.Subject,
|
||
From: parseAddressList(dbMsg.FromAddr),
|
||
Sender: parseAddressList(dbMsg.FromAddr),
|
||
ReplyTo: parseAddressList(dbMsg.FromAddr),
|
||
To: parseAddressList(dbMsg.ToAddr),
|
||
Cc: parseAddressList(dbMsg.CcAddr),
|
||
MessageId: dbMsg.MessageID,
|
||
}
|
||
return env
|
||
}
|
||
|
||
// SearchMessages returns sequence numbers or UIDs of messages matching the criteria.
|
||
func (m *imapMailbox) SearchMessages(uid bool, criteria *imap.SearchCriteria) ([]uint32, error) {
|
||
dbMessages, err := m.stores.Mails.ListAllByUserAndFolder(m.user.id, m.name)
|
||
if err != nil {
|
||
return nil, err
|
||
}
|
||
|
||
var results []uint32
|
||
for i, dbMsg := range dbMessages {
|
||
if m.matchesCriteria(&dbMsg, criteria) {
|
||
if uid {
|
||
results = append(results, uint32(dbMsg.ID))
|
||
} else {
|
||
results = append(results, uint32(i+1))
|
||
}
|
||
}
|
||
}
|
||
|
||
return results, nil
|
||
}
|
||
|
||
// matchesCriteria checks if a message matches the given search criteria.
|
||
func (m *imapMailbox) matchesCriteria(msg *db.Message, criteria *imap.SearchCriteria) bool {
|
||
// Check WithFlags (messages must have all these flags)
|
||
for _, flag := range criteria.WithFlags {
|
||
switch flag {
|
||
case "\\Seen":
|
||
if !msg.IsRead {
|
||
return false
|
||
}
|
||
case "\\Flagged":
|
||
if !msg.IsFlagged {
|
||
return false
|
||
}
|
||
case "\\Deleted":
|
||
if m.deleted == nil || !m.deleted[msg.ID] {
|
||
return false
|
||
}
|
||
}
|
||
}
|
||
|
||
// Check WithoutFlags (messages must NOT have any of these flags)
|
||
for _, flag := range criteria.WithoutFlags {
|
||
switch flag {
|
||
case "\\Seen":
|
||
if msg.IsRead {
|
||
return false
|
||
}
|
||
case "\\Flagged":
|
||
if msg.IsFlagged {
|
||
return false
|
||
}
|
||
case "\\Deleted":
|
||
if m.deleted != nil && m.deleted[msg.ID] {
|
||
return false
|
||
}
|
||
}
|
||
}
|
||
|
||
// Check date range
|
||
if !criteria.Since.IsZero() && msg.Date.Before(criteria.Since) {
|
||
return false
|
||
}
|
||
if !criteria.Before.IsZero() && !msg.Date.Before(criteria.Before) {
|
||
return false
|
||
}
|
||
|
||
// Check header fields
|
||
if criteria.Header != nil {
|
||
if subject := criteria.Header.Get("Subject"); subject != "" {
|
||
if !strings.Contains(strings.ToLower(msg.Subject), strings.ToLower(subject)) {
|
||
return false
|
||
}
|
||
}
|
||
if from := criteria.Header.Get("From"); from != "" {
|
||
if !strings.Contains(strings.ToLower(msg.FromAddr), strings.ToLower(from)) {
|
||
return false
|
||
}
|
||
}
|
||
if to := criteria.Header.Get("To"); to != "" {
|
||
if !strings.Contains(strings.ToLower(msg.ToAddr), strings.ToLower(to)) {
|
||
return false
|
||
}
|
||
}
|
||
}
|
||
|
||
// Check body text
|
||
for _, text := range criteria.Body {
|
||
bodyText := strings.ToLower(msg.TextBody + " " + msg.HtmlBody)
|
||
if !strings.Contains(bodyText, strings.ToLower(text)) {
|
||
return false
|
||
}
|
||
}
|
||
|
||
// Check generic text (searches headers + body)
|
||
for _, text := range criteria.Text {
|
||
allText := strings.ToLower(msg.Subject + " " + msg.FromAddr + " " + msg.ToAddr + " " + msg.TextBody + " " + msg.HtmlBody)
|
||
if !strings.Contains(allText, strings.ToLower(text)) {
|
||
return false
|
||
}
|
||
}
|
||
|
||
// Check NOT criteria
|
||
for _, notCrit := range criteria.Not {
|
||
if m.matchesCriteria(msg, notCrit) {
|
||
return false
|
||
}
|
||
}
|
||
|
||
// Check OR criteria (at least one must match)
|
||
for _, orPair := range criteria.Or {
|
||
if !m.matchesCriteria(msg, orPair[0]) && !m.matchesCriteria(msg, orPair[1]) {
|
||
return false
|
||
}
|
||
}
|
||
|
||
return true
|
||
}
|
||
|
||
// CreateMessage appends a new message to the mailbox (IMAP APPEND command).
|
||
func (m *imapMailbox) CreateMessage(flags []string, date time.Time, body imap.Literal) error {
|
||
// Read the message literal
|
||
data, err := io.ReadAll(body)
|
||
if err != nil {
|
||
return fmt.Errorf("failed to read message body: %w", err)
|
||
}
|
||
|
||
// Parse as MIME message
|
||
mr, err := asgomail.CreateReader(bytes.NewReader(data))
|
||
if err != nil {
|
||
return fmt.Errorf("failed to parse MIME message: %w", err)
|
||
}
|
||
|
||
header := mr.Header
|
||
fromAddr := mailutil.FormatAddressList(&header, "From")
|
||
toAddr := mailutil.FormatAddressList(&header, "To")
|
||
ccAddr := mailutil.FormatAddressList(&header, "Cc")
|
||
subject, _ := header.Subject()
|
||
messageID, _ := header.MessageID()
|
||
msgDate, _ := header.Date()
|
||
if msgDate.IsZero() {
|
||
msgDate = date
|
||
}
|
||
if msgDate.IsZero() {
|
||
msgDate = time.Now()
|
||
}
|
||
|
||
var textBody, htmlBody string
|
||
for {
|
||
p, err := mr.NextPart()
|
||
if err == io.EOF {
|
||
break
|
||
}
|
||
if err != nil {
|
||
break
|
||
}
|
||
|
||
switch h := p.Header.(type) {
|
||
case *asgomail.InlineHeader:
|
||
contentType, params, _ := h.ContentType()
|
||
buf, _ := io.ReadAll(p.Body)
|
||
// 检测并转换字符集
|
||
charset := ""
|
||
if cs, ok := params["charset"]; ok {
|
||
charset = cs
|
||
}
|
||
decoded := mailutil.DecodeCharset(buf, charset)
|
||
if strings.HasPrefix(contentType, "text/plain") {
|
||
textBody = decoded
|
||
} else if strings.HasPrefix(contentType, "text/html") {
|
||
htmlBody = decoded
|
||
}
|
||
case *asgomail.AttachmentHeader:
|
||
// Attachments from APPEND are not saved in this simple implementation
|
||
}
|
||
}
|
||
|
||
if textBody == "" && htmlBody == "" {
|
||
textBody = string(data)
|
||
}
|
||
|
||
// Determine initial flag state
|
||
isRead := false
|
||
isFlagged := false
|
||
for _, flag := range flags {
|
||
switch flag {
|
||
case "\\Seen":
|
||
isRead = true
|
||
case "\\Flagged":
|
||
isFlagged = true
|
||
}
|
||
}
|
||
|
||
msg := &db.Message{
|
||
UserID: m.user.id,
|
||
MessageID: messageID,
|
||
Folder: m.name,
|
||
FromAddr: fromAddr,
|
||
ToAddr: toAddr,
|
||
CcAddr: ccAddr,
|
||
Subject: subject,
|
||
TextBody: textBody,
|
||
HtmlBody: htmlBody,
|
||
RawData: string(data),
|
||
IsRead: isRead,
|
||
IsFlagged: isFlagged,
|
||
Date: msgDate,
|
||
}
|
||
|
||
if err := m.stores.Mails.Create(msg); err != nil {
|
||
return fmt.Errorf("failed to create message: %w", err)
|
||
}
|
||
|
||
// 新邮件（IMAP APPEND）→ 推送给同用户其他已选中该邮箱的客户端
|
||
pushUpdate(m.user.updates, buildNewMessageUpdate(m.stores, m.user.email, m.name, msg))
|
||
|
||
return nil
|
||
}
|
||
|
||
// UpdateMessagesFlags modifies flags on messages.
|
||
func (m *imapMailbox) UpdateMessagesFlags(uid bool, seqset *imap.SeqSet, op imap.FlagsOp, flags []string) error {
|
||
if m.deleted == nil {
|
||
m.deleted = make(map[uint]bool)
|
||
}
|
||
|
||
dbMessages, err := m.stores.Mails.ListAllByUserAndFolder(m.user.id, m.name)
|
||
if err != nil {
|
||
return err
|
||
}
|
||
|
||
// 记录首个持久化错误：SQLite 忙/锁等瞬时失败必须让客户端感知
|
||
// （返回 NO 触发重试），否则已读/星标会静默丢失。
|
||
var firstErr error
|
||
|
||
for i, dbMsg := range dbMessages {
|
||
var match bool
|
||
if uid {
|
||
match = seqset.Contains(uint32(dbMsg.ID))
|
||
} else {
|
||
match = seqset.Contains(uint32(i + 1))
|
||
}
|
||
if !match {
|
||
continue
|
||
}
|
||
|
||
flagSet := make(map[string]bool, len(flags))
|
||
for _, flag := range flags {
|
||
flagSet[flag] = true
|
||
}
|
||
|
||
applyFlag := func(flag string, enabled bool) {
|
||
switch flag {
|
||
case "\\Seen":
|
||
if err := m.stores.Mails.MarkReadState(dbMsg.ID, enabled); err != nil && firstErr == nil {
|
||
log.Printf("IMAP: mark read state for msg %d failed: %v", dbMsg.ID, err)
|
||
firstErr = err
|
||
}
|
||
case "\\Flagged":
|
||
if err := m.stores.Mails.MarkFlagged(dbMsg.ID, enabled); err != nil && firstErr == nil {
|
||
log.Printf("IMAP: mark flagged for msg %d failed: %v", dbMsg.ID, err)
|
||
firstErr = err
|
||
}
|
||
case "\\Deleted":
|
||
if enabled {
|
||
m.deleted[dbMsg.ID] = true
|
||
} else {
|
||
delete(m.deleted, dbMsg.ID)
|
||
}
|
||
}
|
||
}
|
||
|
||
switch op {
|
||
case imap.SetFlags:
|
||
applyFlag("\\Seen", flagSet["\\Seen"])
|
||
applyFlag("\\Flagged", flagSet["\\Flagged"])
|
||
applyFlag("\\Deleted", flagSet["\\Deleted"])
|
||
case imap.AddFlags:
|
||
for flag := range flagSet {
|
||
applyFlag(flag, true)
|
||
}
|
||
case imap.RemoveFlags:
|
||
for flag := range flagSet {
|
||
applyFlag(flag, false)
|
||
}
|
||
}
|
||
|
||
// 标志变化（已读/星标/删除）→ 推送给同用户其他客户端
|
||
// （重新读库取最新状态，\Deleted 取会话内状态）
|
||
fresh, err := m.stores.Mails.GetByID(dbMsg.ID)
|
||
if err != nil {
|
||
continue
|
||
}
|
||
deleted := m.deleted != nil && m.deleted[dbMsg.ID]
|
||
pushUpdate(m.user.updates, buildFlagsUpdate(m.stores, m.user.email, m.name, fresh, deleted))
|
||
}
|
||
|
||
return firstErr
|
||
}
|
||
|
||
// CopyMessages copies messages to another mailbox.
|
||
func (m *imapMailbox) CopyMessages(uid bool, seqset *imap.SeqSet, dest string) error {
|
||
dest, ok := canonicalMailboxName(dest)
|
||
if !ok {
|
||
return backend.ErrNoSuchMailbox
|
||
}
|
||
|
||
dbMessages, err := m.stores.Mails.ListAllByUserAndFolder(m.user.id, m.name)
|
||
if err != nil {
|
||
return err
|
||
}
|
||
|
||
for i, dbMsg := range dbMessages {
|
||
var match bool
|
||
if uid {
|
||
match = seqset.Contains(uint32(dbMsg.ID))
|
||
} else {
|
||
match = seqset.Contains(uint32(i + 1))
|
||
}
|
||
if !match {
|
||
continue
|
||
}
|
||
|
||
// Create a copy in the destination mailbox
|
||
copyMsg := &db.Message{
|
||
UserID: m.user.id,
|
||
MessageID: dbMsg.MessageID,
|
||
Folder: dest,
|
||
FromAddr: dbMsg.FromAddr,
|
||
ToAddr: dbMsg.ToAddr,
|
||
CcAddr: dbMsg.CcAddr,
|
||
Subject: dbMsg.Subject,
|
||
TextBody: dbMsg.TextBody,
|
||
HtmlBody: dbMsg.HtmlBody,
|
||
RawData: dbMsg.RawData,
|
||
IsRead: dbMsg.IsRead,
|
||
IsFlagged: dbMsg.IsFlagged,
|
||
Date: dbMsg.Date,
|
||
}
|
||
if err := m.stores.Mails.Create(copyMsg); err != nil {
|
||
log.Printf("IMAP: failed to copy message %d to %s: %v", dbMsg.ID, dest, err)
|
||
continue
|
||
}
|
||
// 目标邮箱新增 → 推送给同用户其他客户端
|
||
pushUpdate(m.user.updates, buildNewMessageUpdate(m.stores, m.user.email, dest, copyMsg))
|
||
}
|
||
|
||
return nil
|
||
}
|
||
|
||
// MoveMessages moves messages to another mailbox.
|
||
func (m *imapMailbox) MoveMessages(uid bool, seqset *imap.SeqSet, dest string) error {
|
||
dest, ok := canonicalMailboxName(dest)
|
||
if !ok {
|
||
return backend.ErrNoSuchMailbox
|
||
}
|
||
|
||
dbMessages, err := m.stores.Mails.ListAllByUserAndFolder(m.user.id, m.name)
|
||
if err != nil {
|
||
return err
|
||
}
|
||
|
||
for i, dbMsg := range dbMessages {
|
||
var match bool
|
||
if uid {
|
||
match = seqset.Contains(uint32(dbMsg.ID))
|
||
} else {
|
||
match = seqset.Contains(uint32(i + 1))
|
||
}
|
||
if !match {
|
||
continue
|
||
}
|
||
if err := m.stores.Mails.MoveToFolder(dbMsg.ID, dest); err != nil {
|
||
log.Printf("IMAP: failed to move message %d to %s: %v", dbMsg.ID, dest, err)
|
||
continue
|
||
}
|
||
// 目标邮箱新增（移动后消息在 dest）→ 推送给同用户其他客户端
|
||
if moved, err := m.stores.Mails.GetByID(dbMsg.ID); err == nil {
|
||
pushUpdate(m.user.updates, buildNewMessageUpdate(m.stores, m.user.email, dest, moved))
|
||
}
|
||
}
|
||
return nil
|
||
}
|
||
|
||
// Expunge permanently removes messages marked as \Deleted.
|
||
func (m *imapMailbox) Expunge() error {
|
||
if m.deleted == nil {
|
||
return nil
|
||
}
|
||
|
||
// 删除前计算各消息的序号（Expunge 响应序号为删除前状态下的序号）
|
||
var seqs []uint32
|
||
for msgID := range m.deleted {
|
||
if seq := seqOf(m.stores, m.user.id, m.name, msgID); seq > 0 {
|
||
seqs = append(seqs, seq)
|
||
}
|
||
}
|
||
|
||
for msgID := range m.deleted {
|
||
if err := m.stores.Mails.Delete(msgID); err != nil {
|
||
log.Printf("IMAP: failed to expunge message %d: %v", msgID, err)
|
||
}
|
||
}
|
||
m.deleted = make(map[uint]bool)
|
||
|
||
// 删除 → 推送给同用户其他客户端（每条序号一个 ExpungeUpdate）
|
||
for _, seq := range seqs {
|
||
pushUpdate(m.user.updates, &backend.ExpungeUpdate{
|
||
Update: backend.NewUpdate(m.user.email, m.name),
|
||
SeqNum: seq,
|
||
})
|
||
}
|
||
return nil
|
||
}
|
||
|
||
// ---------- Helper functions ----------
|
||
|
||
// parseAddressList parses a comma-separated address string into imap.Address slice.
|
||
func parseAddressList(addrStr string) []*imap.Address {
|
||
if addrStr == "" {
|
||
return nil
|
||
}
|
||
|
||
addresses, err := mail.ParseAddressList(addrStr)
|
||
if err != nil {
|
||
// Fallback: treat the whole string as a single address
|
||
return []*imap.Address{{
|
||
MailboxName: addrStr,
|
||
HostName: "",
|
||
}}
|
||
}
|
||
|
||
result := make([]*imap.Address, 0, len(addresses))
|
||
for _, addr := range addresses {
|
||
parts := strings.SplitN(addr.Address, "@", 2)
|
||
mailbox := parts[0]
|
||
host := ""
|
||
if len(parts) > 1 {
|
||
host = parts[1]
|
||
}
|
||
result = append(result, &imap.Address{
|
||
PersonalName: addr.Name,
|
||
MailboxName: mailbox,
|
||
HostName: host,
|
||
})
|
||
}
|
||
return result
|
||
}
|
||
|
||
// buildRawMessage reconstructs a raw RFC822 message from a db.Message.
|
||
// If RawData is available, it uses the original raw data directly.
|
||
func buildRawMessage(msg *db.Message) []byte {
|
||
// 优先使用原始邮件数据
|
||
if msg.RawData != "" {
|
||
return []byte(msg.RawData)
|
||
}
|
||
|
||
// 降级：从字段重建
|
||
var buf bytes.Buffer
|
||
|
||
// Write headers
|
||
buf.WriteString(fmt.Sprintf("From: %s\r\n", msg.FromAddr))
|
||
buf.WriteString(fmt.Sprintf("To: %s\r\n", msg.ToAddr))
|
||
if msg.CcAddr != "" {
|
||
buf.WriteString(fmt.Sprintf("Cc: %s\r\n", msg.CcAddr))
|
||
}
|
||
buf.WriteString(fmt.Sprintf("Subject: %s\r\n", msg.Subject))
|
||
buf.WriteString(fmt.Sprintf("Date: %s\r\n", msg.Date.Format(time.RFC1123Z)))
|
||
if msg.MessageID != "" {
|
||
buf.WriteString(fmt.Sprintf("Message-ID: %s\r\n", msg.MessageID))
|
||
}
|
||
buf.WriteString("MIME-Version: 1.0\r\n")
|
||
|
||
// Write body
|
||
if msg.HtmlBody != "" && msg.TextBody != "" {
|
||
boundary := fmt.Sprintf("mailgo_%d", msg.ID)
|
||
buf.WriteString(fmt.Sprintf("Content-Type: multipart/alternative; boundary=\"%s\"\r\n", boundary))
|
||
buf.WriteString("\r\n")
|
||
buf.WriteString(fmt.Sprintf("--%s\r\n", boundary))
|
||
buf.WriteString("Content-Type: text/plain; charset=utf-8\r\n\r\n")
|
||
buf.WriteString(msg.TextBody)
|
||
buf.WriteString("\r\n")
|
||
buf.WriteString(fmt.Sprintf("--%s\r\n", boundary))
|
||
buf.WriteString("Content-Type: text/html; charset=utf-8\r\n\r\n")
|
||
buf.WriteString(msg.HtmlBody)
|
||
buf.WriteString("\r\n")
|
||
buf.WriteString(fmt.Sprintf("--%s--\r\n", boundary))
|
||
} else if msg.TextBody != "" {
|
||
buf.WriteString("Content-Type: text/plain; charset=utf-8\r\n\r\n")
|
||
buf.WriteString(msg.TextBody)
|
||
} else if msg.HtmlBody != "" {
|
||
buf.WriteString("Content-Type: text/html; charset=utf-8\r\n\r\n")
|
||
buf.WriteString(msg.HtmlBody)
|
||
} else {
|
||
buf.WriteString("Content-Type: text/plain; charset=utf-8\r\n\r\n")
|
||
}
|
||
|
||
return buf.Bytes()
|
||
}
|
||
|
||
// buildRawHeader reconstructs just the header portion of a raw RFC822 message.
|
||
func buildRawHeader(msg *db.Message) []byte {
|
||
var buf bytes.Buffer
|
||
buf.WriteString(fmt.Sprintf("From: %s\r\n", msg.FromAddr))
|
||
buf.WriteString(fmt.Sprintf("To: %s\r\n", msg.ToAddr))
|
||
if msg.CcAddr != "" {
|
||
buf.WriteString(fmt.Sprintf("Cc: %s\r\n", msg.CcAddr))
|
||
}
|
||
buf.WriteString(fmt.Sprintf("Subject: %s\r\n", msg.Subject))
|
||
buf.WriteString(fmt.Sprintf("Date: %s\r\n", msg.Date.Format(time.RFC1123Z)))
|
||
if msg.MessageID != "" {
|
||
buf.WriteString(fmt.Sprintf("Message-ID: %s\r\n", msg.MessageID))
|
||
}
|
||
buf.WriteString("MIME-Version: 1.0\r\n")
|
||
if msg.HtmlBody != "" && msg.TextBody != "" {
|
||
boundary := fmt.Sprintf("mailgo_%d", msg.ID)
|
||
buf.WriteString(fmt.Sprintf("Content-Type: multipart/alternative; boundary=\"%s\"\r\n", boundary))
|
||
} else if msg.TextBody != "" {
|
||
buf.WriteString("Content-Type: text/plain; charset=utf-8\r\n")
|
||
} else if msg.HtmlBody != "" {
|
||
buf.WriteString("Content-Type: text/html; charset=utf-8\r\n")
|
||
}
|
||
return buf.Bytes()
|
||
}
|