diff --git a/file-system-upload.go b/file-system-upload.go
index 844d092..9d207b1 100644
--- a/file-system-upload.go
+++ b/file-system-upload.go
@@ -358,24 +358,32 @@ func UploadProcessSocketThread(conn *net.Conn, fileLength int64, blockCount *int
 		var imageHash string
 		stop := false
 		errTimes := 0
-		var buffer []byte
 		blockCountLock.Lock()
 		nowBlock := *blockCount
 		*blockCount = *blockCount + 1
+		var recvSize int64 = 0
 		if (nowBlock+1)*singleImageMaxSize > int64(fileLength) {
 			if nowBlock*singleImageMaxSize > int64(fileLength) {
 				break
 			}
-			buffer = make([]byte, fileLength-nowBlock*singleImageMaxSize)
+			recvSize = fileLength - nowBlock*singleImageMaxSize
 		} else {
-			buffer = make([]byte, singleImageMaxSize)
+			recvSize = singleImageMaxSize
 		}
+		buffer := make([]byte, recvSize)
 
-		_, err = (*conn).Read(buffer)
-		if err != nil && err != io.EOF {
-			runtime.GC()
-			threadsWaitGroup.Done()
-			panic(err)
+		var totalBytes int64 = 0
+		for {
+			num, err := (*conn).Read(buffer[totalBytes:recvSize])
+			if err != nil && err != io.EOF {
+				runtime.GC()
+				threadsWaitGroup.Done()
+				panic(err)
+			}
+			totalBytes = totalBytes + int64(num)
+			if totalBytes == recvSize {
+				break
+			}
 		}
 		blockCountLock.Unlock()
 
diff --git a/file-system.go b/file-system.go
index 2288bf9..e226cd8 100644
--- a/file-system.go
+++ b/file-system.go
@@ -85,6 +85,32 @@ func GetTempPath(path string) ([][]string, error) { //获取内部path列表
 	return tempPath, nil
 }
 
+func DoesNodeExist(path string) (bool, string, error) { //查看节点是否存在 path:要查询的路径 返回值:是否存在, node类型
+	if rootNodeHash == "" {
+		return false, "", NotSetARootNodeYet()
+	}
+	if path == "/" {
+		return true, "0", nil
+	}
+
+	nodeRWLock.Lock()
+	tempPath, err := GetTempPath(GetPathFolder(path))
+	if err != nil {
+		nodeRWLock.Unlock()
+		return false, "", err
+	}
+	nodeData, err := DecodeNode(tempPath[len(tempPath)-1][1], true)
+	nodeRWLock.Unlock()
+	if err != nil {
+		return false, "", err
+	}
+
+	if fileData, ok := nodeData[GetPathFileName(path)]; ok {
+		return true, fileData[0], nil
+	}
+	return false, "", nil
+}
+
 func ListFile(path string) ([][]string, error) { //获取当前文件夹下所有东西(ls) path:要获取的路径 返回值:[[文件名,node类型], ...]
 	if rootNodeHash == "" {
 		return nil, NotSetARootNodeYet()