Donn Cave wrote: > In article <[EMAIL PROTECTED]>, > Steve Holden <[EMAIL PROTECTED]> wrote: > > >>The PSH flag indicates that the data stream must be flushed right >>through to the other end. This is essential for interactive protocols >>such as FTP: without it the server has no way to know that the client >>has sent a complete command, and vice versa. > > > So you would expect to see this done explicitly in the source > for an FTP client or server implementation -- something that > sets this PSH flag or else the protocol won't work? Or am > I misunderstanding what you mean? > > I don't see that specific string anywhere in a the particular > FTP implementation whose source happened to be handy, basically > a Berkeley 4.4 variant as I think most are on UNIX. Somewhere > around here I have a pass-through FTP client/server application > that adds GSSAPI-Kerberos5 authentication to the protocol traffic, > and I don't remember needing to do any such thing there. > > I'd have to look harder at the details, but as I recall it, > like any sane application the protocol is defined in terms of > data, so you know if you have a complete command by looking at > what you have. > Nope, I wouldn't look any harder. You and I both know you won't find them. "The client" in this case was the client's transport layer, not the client application - I should have said "sender", since I referred to the system at the other end as the "receiver".
regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC/Ltd http://www.holdenweb.com Love me, love my blog http://holdenweb.blogspot.com Recent Ramblings http://del.icio.us/steve.holden -- http://mail.python.org/mailman/listinfo/python-list
