[NET-731] FTPSClient no longer supports fileTransferMode (eg DEFLATE)

• Type: Task
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: FTP
• Assignee: Unassigned
• Reporter: PJ Fanning
• Created: 03/Jun/24 13:17
• Updated: 13/Jul/24 20:23

Description

The new openDataSecureConnection method in FTPSClient does not support fileTransferMode (eg DEFLATE).

https://github.com/apache/commons-net/pull/90/files#diff-b4292a5bd3e39f502d24bce1eb934384a951a120080c870cdc68c0585a78c6e9[] 

 

The FTPSClient code used to delegate to FTPClient

_openDataConnection_

method.

https://github.com/apache/commons-net/blob/b5038eff135dff54e2ee2d09b94ec7d8937cb09b/src/main/java/org/apache/commons/net/ftp/FTPClient.java#L696

This method supports `wrapOnDeflate` while openDataSecureConnection does not.

I'm not sure if FTPS supports DEFLATE transfer mode but while implementing an Apache Pekko workaround for the NET-718, I spotted the diff.

 

Issue Links

• relates to: NET-718 "Unsupported or unrecognized SSL message" for FTPS via proxy
• relates to: NET-642 FTPSClient execPROT removes proxy settings