From 56e02e14279c4940bde768c1d8223ba2f010395d Mon Sep 17 00:00:00 2001
From: Mihai Galos <mihaigalos@gmail.com>
Date: Thu, 4 Nov 2021 17:32:33 +0100
Subject: [PATCH] Add resume functionality

---
 src/ftp.rs | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/ftp.rs b/src/ftp.rs
index 38526189..1845629e 100644
--- a/src/ftp.rs
+++ b/src/ftp.rs
@@ -435,6 +435,13 @@ impl FtpStream {
         self.read_response(status::CLOSING).map(|_| ())
     }
 
+    /// Sets the byte from which the transfer is to be restarted.
+    pub fn restart_from(&mut self, offset: u64) -> crate::Result<()> {
+        let rest_command = format!("REST {}\r\n", offset.to_string());
+        self.write_str(&rest_command)?;
+        self.read_response(status::REQUEST_FILE_PENDING).map(|_| ())
+    }
+
     /// Retrieves the file name specified from the server.
     /// This method is a more complicated way to retrieve a file.
     /// The reader returned should be dropped.