Using awk printf to urldecode text

awk printf urldecode busybox
Johan picture Johan · Sep 16, 2010 · Viewed 7.7k times · Source

I'm using awk to urldecode some text.

If I code the string into the printf statement like printf "%s", "\x3D" it correctly outputs =. The same if I have the whole escaped string as a variable.

However, if I only have the 3D, how can I append the \x so printf will print the = and not \x3D?

I'm using busybox awk 1.4.2 and the ash shell.

Answer

zwol picture zwol · Sep 16, 2010

I don't know how you do this in awk, but it's trivial in perl:

echo "http://example.com/?q=foo%3Dbar" | 
    perl -pe 's/\+/ /g; s/%([0-9a-f]{2})/chr(hex($1))/eig'

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