[Filer] post add param:saveInside (#4434)

* fix:mount deadlock

* feat: filer http upload to metadata

* feat: /etc save inside

---------

Co-authored-by: zemul <zhouzemiao@ihuman.com>

weed/server/filer_server_handlers_write_autochunk.go

@@ -1,6 +1,7 @@
 package weed_server
 
 import (
+	"bytes"
 	"context"
 	"fmt"
 	//"github.com/seaweedfs/seaweedfs/weed/s3api"
@@ -64,7 +65,6 @@ func (fs *FilerServer) autoChunk(ctx context.Context, w http.ResponseWriter, r *
 }
 
 func (fs *FilerServer) doPostAutoChunk(ctx context.Context, w http.ResponseWriter, r *http.Request, chunkSize int32, contentLength int64, so *operation.StorageOption) (filerResult *FilerPostResult, md5bytes []byte, replyerr error) {
-
 	multipartReader, multipartReaderErr := r.MultipartReader()
 	if multipartReaderErr != nil {
 		return nil, nil, multipartReaderErr
@@ -84,6 +84,15 @@ func (fs *FilerServer) doPostAutoChunk(ctx context.Context, w http.ResponseWrite
 		contentType = ""
 	}
 
+	if so.SaveInside {
+		buf := bufPool.Get().(*bytes.Buffer)
+		buf.Reset()
+		buf.ReadFrom(part1)
+		filerResult, replyerr = fs.saveMetaData(ctx, r, fileName, contentType, so, nil, nil, 0, buf.Bytes())
+		bufPool.Put(buf)
+		return
+	}
+
 	fileChunks, md5Hash, chunkOffset, err, smallContent := fs.uploadReaderToChunks(w, r, part1, chunkSize, fileName, contentType, contentLength, so)
 	if err != nil {
 		return nil, nil, err