兼容有些邮箱客户端没有按照RFC2045规定分割Base64 编码的输出

Author: huangshaokun

encode.go

@@ -5,12 +5,12 @@ import (
 	"encoding/base64"
 	"io"
 	"mime"
-	"mime/quotedprintable"
 	"net/textproto"
 	"sort"
 	"strings"
 	"time"
 
+	"github.com/huangshaokun/mimequotedprintable"
 	"github.com/jhillyerd/enmime/v2/internal/coding"
 	"github.com/jhillyerd/enmime/v2/internal/stringutil"
 )
@@ -243,7 +243,7 @@ func (p *Part) encodeContent(b *bufio.Writer, cte transferEncoding) (err error)
 			text = text[lineLen:]
 		}
 	case teQuoted:
-		qp := quotedprintable.NewWriter(b)
+		qp := mimequotedprintable.NewWriter(b)
 		if _, err = qp.Write(p.Content); err != nil {
 			return err
 		}

go.mod

@@ -6,6 +6,7 @@ require (
 	github.com/cention-sany/utf7 v0.0.0-20170124080048-26cad61bd60a
 	github.com/go-test/deep v1.1.1
 	github.com/gogs/chardet v0.0.0-20211120154057-b7413eaefb8f
+	github.com/huangshaokun/mimequotedprintable v0.0.0-20230626102010-a5b2166f9691
 	github.com/jaytaylor/html2text v0.0.0-20230321000545-74c2419ad056
 	github.com/pkg/errors v0.9.1
 	github.com/stretchr/testify v1.9.0

go.sum

@@ -6,6 +6,8 @@ github.com/go-test/deep v1.1.1 h1:0r/53hagsehfO4bzD2Pgr/+RgHqhmf+k1Bpse2cTu1U=
 github.com/go-test/deep v1.1.1/go.mod h1:5C2ZWiW0ErCdrYzpqxLbTX7MG14M9iiw8DgHncVwcsE=
 github.com/gogs/chardet v0.0.0-20211120154057-b7413eaefb8f h1:3BSP1Tbs2djlpprl7wCLuiqMaUh5SJkkzI2gDs+FgLs=
 github.com/gogs/chardet v0.0.0-20211120154057-b7413eaefb8f/go.mod h1:Pcatq5tYkCW2Q6yrR2VRHlbHpZ/R4/7qyL1TCF7vl14=
+github.com/huangshaokun/mimequotedprintable v0.0.0-20230626102010-a5b2166f9691 h1:cMH8l7waIU0+24EihDQBtCfpwdHsvYNaNgOOg2iyAPE=
+github.com/huangshaokun/mimequotedprintable v0.0.0-20230626102010-a5b2166f9691/go.mod h1:gDBKZcuLIpRM4uX1/Dv2jLAF+9Fqf5zy0Rg2XzPh+Iw=
 github.com/jaytaylor/html2text v0.0.0-20230321000545-74c2419ad056 h1:iCHtR9CQyktQ5+f3dMVZfwD2KWJUgm7M0gdL9NGr8KA=
 github.com/jaytaylor/html2text v0.0.0-20230321000545-74c2419ad056/go.mod h1:CVKlgaMiht+LXvHG173ujK6JUhZXKb2u/BQtjPDIvyk=
 github.com/mattn/go-runewidth v0.0.9/go.mod h1:H031xJmbD/WCDINGzjvQ9THkh0rPKHF+m2gUSrubnMI=

part.go

@@ -6,13 +6,13 @@ import (
 	"encoding/base64"
 	"io"
 	"math/rand"
-	"mime/quotedprintable"
 	"net/textproto"
 	"strconv"
 	"strings"
 	"time"
 
 	"github.com/gogs/chardet"
+	"github.com/huangshaokun/mimequotedprintable"
 	"github.com/jhillyerd/enmime/v2/internal/coding"
 	inttp "github.com/jhillyerd/enmime/v2/internal/textproto"
 	"github.com/jhillyerd/enmime/v2/mediatype"
@@ -290,7 +290,7 @@ func (p *Part) decodeContent(r io.Reader, readPartErrorPolicy ReadPartErrorPolic
 	switch strings.ToLower(encoding) {
 	case cteQuotedPrintable:
 		contentReader = coding.NewQPCleaner(contentReader)
-		contentReader = quotedprintable.NewReader(contentReader)
+		contentReader = mimequotedprintable.NewReader(contentReader)
 	case cteBase64:
 		b64cleaner = coding.NewBase64Cleaner(contentReader)
 		contentReader = base64.NewDecoder(base64.RawStdEncoding, b64cleaner)