fix(handles): fixed an issue where markdown files were automatically parsed into html when using the proxy

Author: stephen-zeng

server/handles/down.go

@@ -1,11 +1,9 @@
 package handles
 
 import (
-	"bytes"
 	"fmt"
 	"io"
 	stdpath "path"
-	"strconv"
 	"strings"
 
 	"github.com/alist-org/alist/v3/internal/conf"
@@ -17,9 +15,7 @@ import (
 	"github.com/alist-org/alist/v3/pkg/utils"
 	"github.com/alist-org/alist/v3/server/common"
 	"github.com/gin-gonic/gin"
-	"github.com/microcosm-cc/bluemonday"
 	log "github.com/sirupsen/logrus"
-	"github.com/yuin/goldmark"
 )
 
 func Down(c *gin.Context) {
@@ -130,34 +126,9 @@ func localProxy(c *gin.Context, link *model.Link, file model.Obj, proxyRange boo
 	}
 	Writer := &common.WrittenResponseWriter{ResponseWriter: c.Writer}
 
-	//优先处理md文件
-	if utils.Ext(file.GetName()) == "md" && setting.GetBool(conf.FilterReadMeScripts) {
-		buf := bytes.NewBuffer(make([]byte, 0, file.GetSize()))
-		w := &common.InterceptResponseWriter{ResponseWriter: Writer, Writer: buf}
-		err = common.Proxy(w, c.Request, link, file)
-		if err == nil && buf.Len() > 0 {
-			if c.Writer.Status() < 200 || c.Writer.Status() > 300 {
-				c.Writer.Write(buf.Bytes())
-				return
-			}
-
-			var html bytes.Buffer
-			if err = goldmark.Convert(buf.Bytes(), &html); err != nil {
-				err = fmt.Errorf("markdown conversion failed: %w", err)
-			} else {
-				buf.Reset()
-				err = bluemonday.UGCPolicy().SanitizeReaderToWriter(&html, buf)
-				if err == nil {
-					Writer.Header().Set("Content-Length", strconv.FormatInt(int64(buf.Len()), 10))
-					Writer.Header().Set("Content-Type", "text/html; charset=utf-8")
-					_, err = utils.CopyWithBuffer(Writer, buf)
-				}
-			}
-		}
-	} else {
-		err = common.Proxy(Writer, c.Request, link, file)
-	}
-	if err == nil {
+	// 删除了优先处理md文件的部分，这会导致下载出的markdown文件是被解析过的
+	// Removed the part that prioritizes md files, which causes the downloaded markdown file parsed to HTML.
+	if err = common.Proxy(Writer, c.Request, link, file); err == nil {
 		return
 	}
 	if Writer.IsWritten() {