Re: Sending and receiving files to remote server through cocoa
Re: Sending and receiving files to remote server through cocoa
- Subject: Re: Sending and receiving files to remote server through cocoa
- From: Chris Hanson <email@hidden>
- Date: Sat, 7 Feb 2004 19:48:40 -0600
On Feb 7, 2004, at 4:22 AM, Ramakrishna Kondapalli wrote:
I am writing a cocoa - ObjC app in which I have to send and receive
files to remote server. The remote server (Also MAC machine) is
locally
mounted on my machine (through Finder -> Go -> connect to Server). How
do this? Does NSURL will help?
In this day and age, I *strongly* recommend *against* building new
client-server systems using network filesystems. Such client-server
systems are typically very fragile, far more so than purely
network-based client-server systems, because file semantics and network
messaging semantics are not identical in practice (no matter what
theory might say).
One particular issue is that many filesystems -- both local and network
-- don't actually support the ability to notify one process when
another closes a file. For example, any system that implements "hot
folders" is fragile there because it need to implement some sort of
heuristic to tell when the second process is done writing the file.
These heuristics can very often be defeated through casual use, leaving
the user mystified.
Another issue is that not all network filesystem protocols are the
same. Things that work perfectly fine with a mounted AFP volume may
not work with the same volume mounted via SMB or NFS, for example. And
then there are distributed filesystems like AFS...
In this day and age, exchanging XML-formatted messages via HTTP is the
way to implement distributed systems. You can easily develop your own
custom protocol or use either XML-RPC or SOAP and get your code done a
lot faster and a lot more robustly.
-- Chris
--
Chris Hanson <email@hidden>
bDistributed.com, Inc.
Outsourcing Vendor Evaluation
Custom Mac OS X Development
Cocoa Developer Training
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