Linux vs. Windows file upload names

Posted on 2002-03-25
Medium Priority
Last Modified: 2013-12-25
Greetings experts,

Not sure of the best place to ask this question, but here we go. I have a simple CGI form that allows the user to upload a file, with the basic <input type="file" ... >.

It works fine, I'm able to get the file on my Linux Apache server, no problem.

But here's the problem: If the client was running on a Linux box, the filename arrives in my CGI script as just the base file name:

"/hello/new/world" arrives as just "world". This is fine because that's all I want, the basename.

BUT, if the client was running on a Windows box it arrives as the fully qualified pathname:


This would be OK if I could easily split the path to get the basename, which I could using "\".  The problem is that "\n" is interpreted as a newline character on the receiving end in my CGI script, which is written in Python.

Certainly, regardless of the CGI language, someone has crossed this bridge before?!

Any thoughts would be appreciated.

- Nelson
Question by:nchenkin
  • 3
  • 2
  • 2
LVL 16

Accepted Solution

maneshr earned 1000 total points
ID: 6894546

".. which I could using "\".  The  problem is that "\n" is interpreted as a newline character on the receiving end in my CGI script, which  is written in Python...."

From a CGI point of view here is an alternative that you might want to consider.

use / as the directory delimiter.

So in the case of a Windows based client, let say you get C:\hello\new\world you replace all \'s with /'s and then process them.

Using this approach i can see 2 advantages.

1) Regardless of which OS the client is using, you are standardizing on the / as the delimiter.
This will make your code work with any client OS
2) You dont run into the \n problem as the search-n-replace has replaced \ with/

Hope that helps.

Author Comment

ID: 6895022

Thanks for the comment. The reason I didn't do this is because I *thought* that the "\n" had already been escaped and arrived at my CGI as a newline. I think this was in error. After your comment I checked it and it looks like  the "\" is still there intact.

Let me do some more checks and then I'll give you the points.

- NC
LVL 16

Expert Comment

ID: 6895374

".. After your comment I checked  it and it looks like  the "\" is still there intact...."

Aha!! Good catch!!!

"..Let me do some more checks..."

Hopefully you will have a working solution with you soon.
Get your problem seen by more experts

Be seen. Boost your question’s priority for more expert views and faster solutions


Expert Comment

ID: 6896049

here's what i'm thinking:

get rid of a new line if it exists with a chomp.
then split on a slash which needs to be escaped.

this i think should do the trick..

<input type="file" ... >.

chomp $file;
my @array = split(/\\/,$file);

foreach (@array)
     print "array:\t$_\n";

Expert Comment

ID: 6896060

also i'm quite sure this module will be of help to you:

regards Peewee

 use File::Basename;
           ($name,$path,$suffix) = fileparse($fullname,@suffixlist)
           $basename = basename($fullname,@suffixlist);
           $dirname = dirname($fullname);
           ($name,$path,$suffix) = fileparse("lib/File/Basename.pm","\.pm");
           $basename = basename("lib/File/Basename.pm",".pm");
           $dirname = dirname("lib/File/Basename.pm");

Author Comment

ID: 6896705
Thanks maneshr,

Things are working now. This actually was what I initially was going to do and didn't really need to ask the question! Your comment made me go back and verify that my first impressions (due to some Python string operations I attempted) were incorrect. So, I am now simply converting all the '\' to '/'.

Thanks for your info as well.

LVL 16

Expert Comment

ID: 6897102

"..Thanks maneshr,..."

You're welcome.

"..Things are working now..."

Glad to know you got the solution you were looking for.

Featured Post

Train for your Pen Testing Engineer Certification

Enroll today in this bundle of courses to gain experience in the logistics of pen testing, Linux fundamentals, vulnerability assessments, detecting live systems, and more! This series, valued at $3,000, is free for Premium members, Team Accounts, and Qualified Experts.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

Batch, VBS, and scripts in general are incredibly useful for repetitive tasks.  Some tasks can take a while to complete and it can be annoying to check back only to discover that your script finished 5 minutes ago.  Some scripts may complete nearly …
In a question here at Experts Exchange, a member was looking for "a little app that would allow sound to be turned OFF and ON by simply clicking on an icon in the system tray". This article shows how to achieve that, as well as providing the same OF…
The viewer will learn the basics of jQuery, including how to invoke it on a web page. Reference your jQuery libraries: (CODE) Include your new external js/jQuery file: (CODE) Write your first lines of code to setup your site for jQuery.: (CODE)
In a recent question (https://www.experts-exchange.com/questions/29004105/Run-AutoHotkey-script-directly-from-Notepad.html) here at Experts Exchange, a member asked how to run an AutoHotkey script (.AHK) directly from Notepad++ (aka NPP). This video…

623 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question