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Merge pull request #1 from killerprojecte/main

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fix: decode RFC 2047 encoded words in mail sender display name
This commit is contained in:
LanQin_
2026-06-19 23:35:18 +08:00
committed by GitHub
parent adbf3e886a b147be3753
commit a592926d60
6 changed files with 170 additions and 27 deletions
Download Patch File Download Diff File Expand all files Collapse all files
apps/api/go.mod
+1
View File
@@ -20,6 +20,7 @@ require (
github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // indirect
golang.org/x/net v0.26.0 // indirect
golang.org/x/sys v0.23.0 // indirect
golang.org/x/text v0.38.0 // indirect
modernc.org/gc/v3 v3.0.0-20240107210532-573471604cb6 // indirect
modernc.org/libc v1.55.3 // indirect
modernc.org/mathutil v1.6.0 // indirect
apps/api/go.sum
+4
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@@ -26,13 +26,17 @@ golang.org/x/crypto v0.26.0 h1:RrRspgV4mU+YwB4FYnuBoKsUapNIL5cohGAmSH3azsw=
golang.org/x/crypto v0.26.0/go.mod h1:GY7jblb9wI+FOo5y8/S2oY4zWP07AkOJ4+jxCqdqn54=
golang.org/x/mod v0.16.0 h1:QX4fJ0Rr5cPQCF7O9lh9Se4pmwfwskqZfq5moyldzic=
golang.org/x/mod v0.16.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
golang.org/x/mod v0.36.0 h1:JJjpVx6myfUsUdAzZuOSTTmRE0PfZeNWzzvKrP7amb4=
golang.org/x/net v0.26.0 h1:soB7SVo0PWrY4vPW/+ay0jKDNScG2X9wFeYlXIvJsOQ=
golang.org/x/net v0.26.0/go.mod h1:5YKkiSynbBIh3p6iOc/vibscux0x38BZDkn8sCUPxHE=
golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.23.0 h1:YfKFowiIMvtgl1UERQoTPPToxltDeZfbj4H7dVUCwmM=
golang.org/x/sys v0.23.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
golang.org/x/text v0.38.0 h1:sXmwo9DwP3OK9EZ7PqAdaooSGozfl/3a6/xJcbzPRhE=
golang.org/x/text v0.38.0/go.mod h1:YXZt3QhHUKYT53r2lLKFIVi6Ao1jdzrTR/KQ09qyxF4=
golang.org/x/tools v0.19.0 h1:tfGCXNR1OsFG+sVdLAitlpjAvD/I6dHDKnYrpEZUHkw=
golang.org/x/tools v0.19.0/go.mod h1:qoJWxmGSIBmAeriMx19ogtrEPrGtDbPK634QFIcLAhc=
golang.org/x/tools v0.45.0 h1:18qN3FAooORvApf5XjCXgsuayZOEtXf6JK18I3+ONa8=
modernc.org/cc/v4 v4.21.4 h1:3Be/Rdo1fpr8GrQ7IVw9OHtplU4gWbb+wNgeoBMmGLQ=
modernc.org/cc/v4 v4.21.4/go.mod h1:HM7VJTZbUCR3rV8EYBi9wxnJ0ZBRiGE5OeGXNA0IsLQ=
modernc.org/ccgo/v4 v4.19.2 h1:lwQZgvboKD0jBwdaeVCTouxhxAyN6iawF3STraAal8Y=
apps/api/internal/app/maildir_sync.go
+93 -16
View File
@@ -15,8 +15,12 @@ import (
"net/textproto"
"os"
"path/filepath"
"regexp"
"strings"
"time"
"golang.org/x/text/encoding"
"golang.org/x/text/encoding/ianaindex"
)
type maildirMailbox struct {
@@ -350,8 +354,7 @@ func (a *App) parseMaildirMessage(raw []byte, fallbackTo string) (storedMessage,
if err != nil {
return storedMessage{}, nil, err
}
decoder := new(mime.WordDecoder)
subject, _ := decoder.DecodeHeader(m.Header.Get("Subject"))
subject := decodeMIMEHeader(m.Header.Get("Subject"))
if strings.TrimSpace(subject) == "" {
subject = "(no subject)"
}
@@ -460,23 +463,14 @@ func transferReader(encoding string, r io.Reader) io.Reader {
}
func partFilename(header textproto.MIMEHeader) string {
decoder := new(mime.WordDecoder)
if _, params, err := mime.ParseMediaType(header.Get("Content-Disposition")); err == nil {
if name := strings.TrimSpace(params["filename"]); name != "" {
decoded, _ := decoder.DecodeHeader(name)
if decoded != "" {
name = decoded
}
return filepath.Base(name)
return filepath.Base(decodeMIMEHeader(name))
}
}
if _, params, err := mime.ParseMediaType(header.Get("Content-Type")); err == nil {
if name := strings.TrimSpace(params["name"]); name != "" {
decoded, _ := decoder.DecodeHeader(name)
if decoded != "" {
name = decoded
}
return filepath.Base(name)
return filepath.Base(decodeMIMEHeader(name))
}
}
return ""
@@ -485,17 +479,100 @@ func partFilename(header textproto.MIMEHeader) string {
func firstAddressParts(value string) (string, string) {
items, err := netmail.ParseAddressList(value)
if err != nil || len(items) == 0 {
return strings.TrimSpace(value), ""
// ParseAddressList failed — attempt RFC 2047 decode on the raw header,
// then retry parsing. This handles non-standard From headers where
// encoded words (e.g. =?UTF-8?B?…?=) cause the initial parse to fail.
decoded := decodeMIMEHeader(value)
items, err = netmail.ParseAddressList(decoded)
if err != nil || len(items) == 0 {
// Still unparseable: return the decoded value and try to extract
// a display name from the decoded string.
email, name := splitNameAndEmail(decoded)
return normalizeEmail(email), strings.TrimSpace(name)
}
}
item := items[0]
return normalizeEmail(item.Address), strings.TrimSpace(item.Name)
// Decode item.Name individually so that non-UTF-8 charsets (e.g. GBK,
// Shift_JIS) are handled by our CharsetReader, while the address list
// structure is parsed from the raw header (avoiding commas/semicolons
// inside decoded display names breaking the parser).
return normalizeEmail(item.Address), strings.TrimSpace(decodeMIMEHeader(item.Name))
}
// decodeMIMEHeader decodes all RFC 2047 encoded words (=?charset?encoding?data?=)
// in the given header value. Falls back to the original value on any error.
// Supports non-UTF-8 charsets (e.g. GBK, GB2312, Shift_JIS) via x/text.
// Per RFC 2047 §6.2, linear whitespace between adjacent encoded words is
// stripped before decoding.
func decodeMIMEHeader(value string) string {
if !strings.Contains(value, "=?") {
return value
}
// RFC 2047 §6.2: ignore whitespace between adjacent encoded words.
collapsed := adjacentEncodedWordSpaceRe.ReplaceAllString(value, "$1$2")
decoder := &mime.WordDecoder{
CharsetReader: charsetReader,
}
decoded, err := decoder.DecodeHeader(collapsed)
if err != nil {
return value
}
return decoded
}
// adjacentEncodedWordSpaceRe matches whitespace between two adjacent RFC 2047
// encoded words. Per RFC 2047 §6.2, this whitespace must be ignored when
// displaying the header.
var adjacentEncodedWordSpaceRe = regexp.MustCompile(`(\?=)\s+(=\?)`)
// charsetReader converts a non-UTF-8 charset stream into UTF-8 using x/text encodings.
func charsetReader(charset string, input io.Reader) (io.Reader, error) {
charset = strings.ToLower(strings.TrimSpace(charset))
if charset == "utf-8" || charset == "us-ascii" {
return input, nil
}
enc, err := ianaindex.IANA.Encoding(charset)
if err != nil {
return nil, fmt.Errorf("unsupported charset %q: %w", charset, err)
}
if enc == nil || enc == encoding.Nop || enc == encoding.Replacement {
return nil, fmt.Errorf("unsupported charset %q", charset)
}
return enc.NewDecoder().Reader(input), nil
}
// splitNameAndEmail attempts to extract a display name and email address from
// a string like "Display Name <user@example.com>" or plain "user@example.com".
func splitNameAndEmail(value string) (string, string) {
value = strings.TrimSpace(value)
if value == "" {
return "", ""
}
// Try "Name <email>" pattern
if idx := strings.LastIndex(value, "<"); idx >= 0 {
email := strings.TrimSpace(strings.Trim(value[idx+1:], "> "))
name := strings.TrimSpace(strings.Trim(value[:idx], `" `))
if strings.Contains(email, "@") {
return email, name
}
}
// Plain email or unknown format
if strings.Contains(value, "@") {
return value, ""
}
return value, ""
}
func addressList(value string) []string {
items, err := netmail.ParseAddressList(value)
if err != nil {
if err != nil || len(items) == 0 {
// ParseAddressList failed — attempt RFC 2047 decode, then retry.
decoded := decodeMIMEHeader(value)
items, err = netmail.ParseAddressList(decoded)
if err != nil || len(items) == 0 {
return nil
}
}
out := make([]string, 0, len(items))
for _, item := range items {
out = append(out, normalizeEmail(item.Address))
apps/web/src/lib/utils.ts
+59
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@@ -25,3 +25,62 @@ export function formatBytes(bytes: number) {
while (size >= 1024 && idx < units.length - 1) { size /= 1024; idx++ }
return `${size.toFixed(idx === 0 ? 0 : 1)} ${units[idx]}`
}
/**
* Normalize charset aliases to canonical names supported by the browser's TextDecoder.
* Only contains aliases that differ from their canonical name — standard names like
* "gb18030", "big5", "euc-kr" are passed through directly to TextDecoder.
*/
function normalizeCharset(charset: string): string {
const c = charset.toLowerCase().trim()
const aliases: Record<string, string> = {
"gb2312": "gbk",
"x-gbk": "gbk",
"euc-cn": "gbk",
"hz-gb-2312": "gbk",
"shift-jis": "shift_jis",
"sjis": "shift_jis",
"windows-31j": "shift_jis",
"ks_c_5601-1987": "euc-kr",
"ksc5601": "euc-kr",
"windows-949": "euc-kr",
"iso-8859-1": "windows-1252",
}
const mapped = aliases[c]
if (mapped) return mapped
// cpXXX / cpXXX windows code pages: cp936→windows-936, cp943→windows-943, etc.
if (/^cp\d+$/.test(c)) return "windows-" + c.slice(2)
return c
}
/**
* Decode RFC 2047 encoded words in mail headers (e.g. =?UTF-8?B?5byA5ZSu?=).
* Handles Base64 (B) and Quoted-Printable (Q) encoding.
* Supports non-UTF-8 charsets (e.g. GBK, GB2312, Shift_JIS) via charset alias normalization.
* Per RFC 2047 §6.2, linear whitespace between adjacent encoded words is stripped.
* Returns the original string unchanged if no encoded words are found or on error.
*/
export function decodeMimeHeader(value: string): string {
if (!value || !value.includes("=?")) return value
// RFC 2047 §6.2: ignore whitespace between adjacent encoded words.
const collapsed = value.replace(/(\?=)\s+(=\?)/g, "$1$2")
return collapsed.replace(/=\?([^?]+)\?([bBqQ])\?([^?]*)\?=/g, (_match, charset, encoding, encoded) => {
try {
const lowerEncoding = String(encoding).toLowerCase()
let decoded: string
if (lowerEncoding === "b") {
const sanitized = encoded.replace(/\s+/g, "")
const padded = sanitized + "=".repeat((4 - (sanitized.length % 4)) % 4)
decoded = atob(padded)
} else {
decoded = encoded.replace(/_/g, " ").replace(/=([0-9a-fA-F]{2})/g, (_m: string, hex: string) => String.fromCharCode(parseInt(hex, 16)))
}
const bytes = new Uint8Array(Array.from(decoded, (ch) => ch.charCodeAt(0)))
const normalized = normalizeCharset(charset) || "utf-8"
const decoder = new TextDecoder(normalized)
return decoder.decode(bytes)
} catch {
return _match
}
})
}
apps/web/src/pages/admin.tsx
+6 -5
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@@ -4,7 +4,7 @@ import { useSearchParams } from "react-router-dom"
import { useInfiniteQuery, useMutation, useQuery, useQueryClient } from "@tanstack/react-query"
import { ArrowRight, CheckCircle2, Circle, Copy, Globe2, Mailbox, MoreHorizontal, Plus, RefreshCcw, Search, ShieldCheck, Trash2, Users } from "lucide-react"
import { api, AdminUser, Alias, DNSRecord, Domain, Mailbox as MailboxType, MailMessage, MailTemplate, SystemSettings } from "@/lib/api"
import { cn, formatBytes, formatDate } from "@/lib/utils"
import { cn, decodeMimeHeader, formatBytes, formatDate } from "@/lib/utils"
import { Button } from "@/components/ui/button"
import { Input } from "@/components/ui/input"
import { Label } from "@/components/ui/label"
@@ -811,9 +811,9 @@ function escapeHtml(value: string) {
}
function adminSenderDisplayName(message: MailMessage) {
const fromName = message.fromName?.trim()
const fromName = decodeMimeHeader(message.fromName?.trim() || "")
if (fromName) return fromName
const text = message.from.trim()
const text = decodeMimeHeader(message.from.trim())
const namedAddress = text.match(/^"?([^"<]+?)"?\s*<[^>]+>$/)
const name = namedAddress?.[1]?.trim()
if (name) return name
@@ -822,8 +822,9 @@ function adminSenderDisplayName(message: MailMessage) {
}
function adminSenderTitle(message: MailMessage) {
const name = message.fromName?.trim()
return name ? `${name} <${message.from}>` : message.from
const name = decodeMimeHeader(message.fromName?.trim() || "")
const from = decodeMimeHeader(message.from)
return name ? `${name} <${from}>` : from
}
function Stat({ icon, label, value }: { icon: React.ReactNode; label: string; value: React.ReactNode }) {
apps/web/src/pages/mail.tsx
+6 -5
View File
@@ -14,7 +14,7 @@ import { useNavigate } from "react-router-dom"
import type { ImperativePanelHandle } from "react-resizable-panels"
import { AlignCenter, AlignLeft, AlignRight, Archive, ArrowLeft, Bold, Calendar, Check, ChevronDown, ChevronsUpDown, Clock3, Code2, Copy, Ellipsis, Eraser, Eye, FileText, Forward, Highlighter, Image, Inbox, IndentDecrease, IndentIncrease, Italic, Link, List, ListOrdered, Mail, MailCheck, Moon, PanelLeftClose, PanelLeftOpen, Paperclip, PencilLine, Plus, Quote, Redo2, RefreshCcw, Reply, Search, Send, Settings, Signature, SlidersHorizontal, Smile, Star, Strikethrough, Sun, Tag, Trash2, Type, Underline, Undo2, X } from "lucide-react"
import { api, Mailbox, MailFolder, MailLabel, MailMessage, SendPayload, DraftPayload, ScheduledSend } from "@/lib/api"
import { cn, formatBytes, formatDate, formatDateTime } from "@/lib/utils"
import { cn, decodeMimeHeader, formatBytes, formatDate, formatDateTime } from "@/lib/utils"
import { applyTheme, getInitialTheme } from "@/lib/theme"
import { useDisplayMode } from "@/lib/display-mode"
import { Button } from "@/components/ui/button"
@@ -1306,13 +1306,13 @@ function accountInitial(name: string, email?: string) {
}
function senderDisplayName(message: MailMessage) {
const fromName = message.fromName?.trim()
const fromName = decodeMimeHeader(message.fromName?.trim() || "")
if (fromName) return fromName
return displayNameFromAddress(message.from)
}
function displayNameFromAddress(value: string) {
const text = value.trim()
const text = decodeMimeHeader(value.trim())
const namedAddress = text.match(/^"?([^"<]+?)"?\s*<[^>]+>$/)
const name = namedAddress?.[1]?.trim()
if (name) return name
@@ -1322,8 +1322,9 @@ function displayNameFromAddress(value: string) {
}
function senderTitle(message: MailMessage) {
const name = message.fromName?.trim()
return name ? `${name} <${message.from}>` : message.from
const name = decodeMimeHeader(message.fromName?.trim() || "")
const from = decodeMimeHeader(message.from)
return name ? `${name} <${from}>` : from
}
function MessageRow({