Precaution not to open the same file

diff --git a/main.go b/main.go
index b5bd5f5069e49a0a58fed218635c418213efad05..23a3accbe2046619267e52bebb7c6d653e8b5934 100644 (file)
--- a/main.go
+++ b/main.go
@@ -134,7 +134,7 @@ func upload(w http.ResponseWriter, r *http.Request) {
        tai64n.FromTime(t, ts)
        tai := ts.Encode()[1:]
        fnOrig := p.FileName()
-       fd, err := os.OpenFile(tai+".part", os.O_WRONLY|os.O_CREATE, 0666)
+       fd, err := os.OpenFile(tai+".part", os.O_WRONLY|os.O_CREATE|os.O_EXCL, 0666)
        if err != nil {
                log.Println(r.RemoteAddr, tai, fnOrig, err)
                return