feat(upload): detect and specify mime type for files uploaded to S3 and OSS (fix#1681)

pkg/filesystem/driver/s3/handler.go

@@ -326,9 +326,10 @@ func (handler *Driver) Token(ctx context.Context, ttl int64, uploadSession *seri
 	// 创建分片上传
 	expires := time.Now().Add(time.Duration(ttl) * time.Second)
 	res, err := handler.svc.CreateMultipartUpload(&s3.CreateMultipartUploadInput{
-		Bucket:  &handler.Policy.BucketName,
-		Key:     &fileInfo.SavePath,
-		Expires: &expires,
+		Bucket:      &handler.Policy.BucketName,
+		Key:         &fileInfo.SavePath,
+		Expires:     &expires,
+		ContentType: aws.String(fileInfo.DetectMimeType()),
 	})
 	if err != nil {
 		return nil, fmt.Errorf("failed to create multipart upload: %w", err)

pkg/filesystem/fsctx/stream.go

@@ -2,6 +2,7 @@ package fsctx
 
 import (
 	"errors"
+	"github.com/HFO4/aliyun-oss-go-sdk/oss"
 	"io"
 	"time"
 )
@@ -17,7 +18,7 @@ const (
 
 type UploadTaskInfo struct {
 	Size            uint64
-	MIMEType        string
+	MimeType        string
 	FileName        string
 	VirtualPath     string
 	Mode            WriteMode
@@ -30,6 +31,15 @@ type UploadTaskInfo struct {
 	Src             string
 }
 
+// Get mimetype of uploaded file, if it's not defined, detect it from file name
+func (u *UploadTaskInfo) DetectMimeType() string {
+	if u.MimeType != "" {
+		return u.MimeType
+	}
+
+	return oss.TypeByExtension(u.FileName)
+}
+
 // FileHeader 上传来的文件数据处理器
 type FileHeader interface {
 	io.Reader
@@ -51,7 +61,7 @@ type FileStream struct {
 	Size            uint64
 	VirtualPath     string
 	Name            string
-	MIMEType        string
+	MimeType        string
 	SavePath        string
 	UploadSessionID *string
 	AppendStart     uint64
@@ -90,7 +100,7 @@ func (file *FileStream) Seekable() bool {
 func (file *FileStream) Info() *UploadTaskInfo {
 	return &UploadTaskInfo{
 		Size:            file.Size,
-		MIMEType:        file.MIMEType,
+		MimeType:        file.MimeType,
 		FileName:        file.Name,
 		VirtualPath:     file.VirtualPath,
 		Mode:            file.Mode,

pkg/webdav/webdav.go

@@ -345,7 +345,7 @@ func (h *Handler) handlePut(w http.ResponseWriter, r *http.Request, fs *filesyst
 	fileName := path.Base(reqPath)
 	filePath := path.Dir(reqPath)
 	fileData := fsctx.FileStream{
-		MIMEType:    r.Header.Get("Content-Type"),
+		MimeType:    r.Header.Get("Content-Type"),
 		File:        r.Body,
 		Size:        fileSize,
 		Name:        fileName,