Less syscalls to open files on the receiving end

src/main.go

@@ -30,7 +30,7 @@ import (
 )
 
 var (
-	VERSION string = "v2.3.0"
+	VERSION string = "v2.3.1"
 
 	versionInformation string = fmt.Sprintf("ftu %s\nfile transferring utility\n\nCopyright (C) 2021,2022  Kasyanov Nikolay Alexeevich (Unbewohnte (me@unbewohnte.xyz))\nThis program comes with ABSOLUTELY NO WARRANTY.\nThis is free software, and you are welcome to redistribute it under certain conditions; type \"ftu -l\" for details.\n", VERSION)
 

src/node/node.go

@@ -774,11 +774,12 @@ func (node *Node) receive() {
 					// accepted
 
 					// append provided bytes to the file
-
+					if acceptedFile.Handler == nil {
 						err = acceptedFile.Open()
 						if err != nil {
 							panic(err)
 						}
+					}
 
 					fileBytes := fileBytesBuffer.Bytes()
 
@@ -788,11 +789,6 @@ func (node *Node) receive() {
 					}
 					acceptedFile.SentBytes += uint64(wrote)
 					node.transferInfo.Receiving.ReceivedBytes += uint64(wrote)
-
-					err = acceptedFile.Close()
-					if err != nil {
-						panic(err)
-					}
 				}
 			}
 
@@ -819,10 +815,12 @@ func (node *Node) receive() {
 						fmt.Printf("\n[File] fully received \"%s\" -- %d bytes", acceptedFile.Name, acceptedFile.Size)
 					}
 
+					if acceptedFile.Handler == nil {
 						err = acceptedFile.Open()
 						if err != nil {
 							panic(err)
 						}
+					}
 
 					// remove this file from the pool
 					node.transferInfo.Receiving.AcceptedFiles = append(node.transferInfo.Receiving.AcceptedFiles[:index], node.transferInfo.Receiving.AcceptedFiles[index+1:]...)