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The moose likes Programmer Certification (SCJP/OCPJP) and the fly likes upload txt files only Big Moose Saloon
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upload txt files only

priyanka jolly

Joined: Oct 31, 2006
Posts: 9
Hi I am writing a code to allow only txt files to upload.I have written a javascript to allow only .txt files to upload.But if the user gets cranky and renames an exe file to .txt file then on upload i have to prevent it as it results in uploading of junk data Can you please let me know is there a way to know the content type of the file being loaded or any other way i can prevent it. i am using commons-file upload jar
Abdul Mohsin
Ranch Hand

Joined: Apr 26, 2007
Posts: 111


just giving you an idea , just get the content and check using unicode values that they are normal charecters(a-z A-Z) or numbers (0-9) if some special charecters are there then don't allow them.

Abdul Mohsin

Regards, Abdul Mohsin
Barry Gaunt
Ranch Hand

Joined: Aug 03, 2002
Posts: 7729
Nothing to do with SCJP here. Send a PM to a moderator when you can think of the right forum for your topic. Then we will move it for you.

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subject: upload txt files only