cl-ftp

* Overview

CL-FTP is a library which provides FTP client functionality to a Common Lisp
program.  CL-FTP uses the USOCKET package for network sockets and the
SPLIT-SEQUENCE package for some parsing needs.

* Examples

#+begin_src lisp
  (with-ftp-connection (conn :hostname "foo")
    (retrieve-file conn "bar" "baz"))
#+end_src

Further examples should be included with your copy of this software.  See
simple-client.lisp for a simple FTP client written with CL-FTP.

* #'RETRIEVE-FILE / #'STORE-FILE hang or don't work

 * Short answer :: Use passive FTP.

 * Long answer :: FTP is something of a weird protocol, and this tends to trip
   people up—FTP opens up two connections, one for commands, and one for data
   (file transfers).  The data channel can be opened in two different ways: in
   "active" mode (the default), the client tells the server "hey, connect to me
   on port X", and then the server actually opens the connection to the client;
   in "passive" mode, the client connects to the server.

   As you might imagine, active mode does not play well with NAT or firewalls,
   and this is usually the problem when commands work, but files fail to
   download. Most likely, including =:passive-ftp-p t= in your
   =WITH-FTP-CONNECTION= or =(make-instance 'ftp-connection)= form will get you
   going.

* License

This software, and documentation, is copyright various authors.  Redistribution
and modification is permitted under a MIT-style license.  See the LICENSE file
for more details.


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