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Javascript and control characters

Posted on 2004-08-05
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Last Modified: 2008-03-06
Heya Experts,

(Linux, Apache, Javascript)

I have a form which is being created dynamically. It has couple of fields with 1-10 in size. The form collects the data, verifies it and sends the data (form.field.value)  to a cgi program. The cgi (C) program gets the data through its arguments.

cgi.exe  -f1 data1 -f2 data2 ...

The issue occurs when the data contains control/special characters. I suppose Javascript (or Browser) handles that. For example;
If I enter ampersand (!) character in the first field, it gets

cgi.exe -f1 "\041" ... (octal value)

Can anyone please give me some pointers about how to print the ascii value of it, instead of octals? Again, it is a dynamic form/field there is no special replacement at users end. They may enter anything they want.

Cheers,
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Question by:malatya
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7 Comments
 
LVL 36

Expert Comment

by:Zyloch
ID: 11727372
Hi

Since it's probably the browser, at the cgi end, can't you use oct to change the octal number to a decimal. Then, use chr to figure it's character out.

Regards,
Zyloch
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Author Comment

by:malatya
ID: 11729276
Zyloch, thanks for the comment. Unfortunately, it is not easy to convert the octals to ascii at cgi end. Not impossible but the argument might be composed of octals and asciis together. You need to differenciate the charcter whether it is octal/hex or ascii then do something accordingly.
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LVL 36

Expert Comment

by:Zyloch
ID: 11729589
You might try this at the perl end:

s/\\(d+){3}/chr(oct($+))/gi

Regards,
${Zyloch}
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Author Comment

by:malatya
ID: 12071066
Actually, I found a solution. Before the scripts pass the arguments to cgi it echoes with -e option and works perfectly.

(bash) echo -e <the argument> > cgi

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LVL 36

Expert Comment

by:Zyloch
ID: 12071082
Ah, that's good, then you should post in Community Support to close and refund this question. Glad you figured it out :)
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Accepted Solution

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Lunchy earned 0 total points
ID: 12080092
Closed, 100 points refunded.
Lunchy
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