fix(webdav): set mime by ext if it's empty

internal/aria2/monitor.go

@@ -2,7 +2,6 @@ package aria2
 
 import (
 	"fmt"
-	"mime"
 	"os"
 	"path"
 	"strconv"
@@ -13,6 +12,7 @@ import (
 	"github.com/alist-org/alist/v3/internal/model"
 	"github.com/alist-org/alist/v3/internal/op"
 	"github.com/alist-org/alist/v3/pkg/task"
+	"github.com/alist-org/alist/v3/pkg/utils"
 	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 )
@@ -147,10 +147,7 @@ func (m *Monitor) Complete() error {
 			Func: func(tsk *task.Task[uint64]) error {
 				defer wg.Done()
 				size, _ := strconv.ParseInt(file.Length, 10, 64)
-				mimetype := mime.TypeByExtension(path.Ext(file.Path))
-				if mimetype == "" {
-					mimetype = "application/octet-stream"
-				}
+				mimetype := utils.GetMimeType(file.Path)
 				f, err := os.Open(file.Path)
 				if err != nil {
 					return errors.Wrapf(err, "failed to open file %s", file.Path)

internal/fs/util.go

@@ -3,7 +3,6 @@ package fs
 import (
 	"fmt"
 	"io"
-	"mime"
 	"net/http"
 	"os"
 	stdpath "path"
@@ -38,7 +37,7 @@ var httpClient = &http.Client{}
 
 func getFileStreamFromLink(file model.Obj, link *model.Link) (model.FileStreamer, error) {
 	var rc io.ReadCloser
-	mimetype := mime.TypeByExtension(stdpath.Ext(file.GetName()))
+	mimetype := utils.GetMimeType(file.GetName())
 	if link.Data != nil {
 		rc = link.Data
 	} else if link.FilePath != nil {

pkg/utils/file.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"io"
 	"io/ioutil"
+	"mime"
 	"os"
 	"path"
 	"path/filepath"
@@ -136,3 +137,12 @@ func GetFileType(filename string) int {
 	}
 	return conf.UNKNOWN
 }
+
+func GetMimeType(name string) string {
+	ext := path.Ext(name)
+	m := mime.TypeByExtension(ext)
+	if m != "" {
+		return m
+	}
+	return "application/octet-stream"
+}

server/webdav/webdav.go

@@ -300,6 +300,9 @@ func (h *Handler) handlePut(w http.ResponseWriter, r *http.Request) (status int,
 		ReadCloser: r.Body,
 		Mimetype:   r.Header.Get("Content-Type"),
 	}
+	if stream.Mimetype == "" {
+		stream.Mimetype = utils.GetMimeType(reqPath)
+	}
 	err = fs.PutDirectly(ctx, path.Dir(reqPath), stream)
 
 	// TODO(rost): Returning 405 Method Not Allowed might not be appropriate.