Issue 12139: add CCC command support to FTP_TLS class to revert the SSL connection back to clear-text.
diff --git a/Lib/ftplib.py b/Lib/ftplib.py
index d15a135..eaaa6fd 100644
--- a/Lib/ftplib.py
+++ b/Lib/ftplib.py
@@ -708,6 +708,14 @@
self.file = self.sock.makefile(mode='r', encoding=self.encoding)
return resp
+ def ccc(self):
+ '''Switch back to a clear-text control connection.'''
+ if not isinstance(self.sock, ssl.SSLSocket):
+ raise ValueError("not using TLS")
+ resp = self.voidcmd('CCC')
+ self.sock = self.sock.unwrap()
+ return resp
+
def prot_p(self):
'''Set up secure data connection.'''
# PROT defines whether or not the data channel is to be protected.