Enhancement to support FTP connection with NAT scenario

Feature or enhancement

Proposal:

Some of new FTP servers are responding with 229 Entering Extended passive mode response when PASV command is sent.. Because of this sendcmd('PASV') is sending error though it's a accepted response. Tested with filezilla manually where it's accepting the same. So we need to make changes in ftplib to accept & parse Extended mode with 'PASV' command. Please help to review and merge.

Has this already been discussed elsewhere?

This is a minor feature, which does not need previous discussion elsewhere

Links to previous discussion of this feature:

No response

Linked PRs

• gh-127477
• gh-150236

Python の ftplib による sendcmd('PASV') の処理から始め、gh-127477 と gh-150236 の関連する作業を確認してください。FTP NAT シナリオ向けに受け入れられた 229 応答が解析され、既存の PASV の動作を壊さないことが完了の条件です。