URL encode?

Is there a way to encode a text as a URL?
So from bar "foo" then "foo% 20bar" are.

The offers httpd's just not the way back, but.
Is there another tool that could help me?

Matze

Edit:
My current solution is:
I have a file "/ tmp / flash / urlencode.sed created" with the following contents: Code:

  s / /% 20 / g
 s /: /% 3A / g
 s / (/% 28 / g
 s /) /% 29 / g
 s /, /% 2C / g
 s / ü /% C3% BC / g
 s / ä /% C3% A4 / g
 s / ö /% C3% B6 / g
 s / ß /% C3% 9F / g
 s /, /% 3B / g
 s / ~ /% 7e / g
 s /! /% 21 / g
 s / "/% 22 / g
 s / # /% 23 / g
 s /  $ /% 24 / g
 s /  & /% 26 / g
 s / @ /% 40 / g
 s /  [/% 5b / g
 s /   /% 5c / g
 s / ] /% 5d / g
 s / _ /% 5f / g
 s / `/% 60 / g
 s / (/% 7b / g
 s / | /% 7c / g
 s /) /% 7d / g 

the ecoding, into the variable "text" standing, message calling on because I do then Code:

  text = $ (echo "$ text" | sed-f / var / tmp / flash / urlencode.sed) 

Which I then trailed to the URL example Code:

  wget "http://bsp.tdl/listener.php?msg = $ text" 

But maybe someone else knows another solution?

---

More compact the Andreas Bühmann makes the call monitor. Excerpt from url.sh:

Code:

  urlencode () (
 _urlencode '%  1' "$ @"
 )
 _urlencode () (
 local replacement = $ 1; shift
 local txt = $ *
 case $ txt
 * [! 0-9A-z-Z_a !*.-]*);;
 *) Txt echo-n "$"; return;;
 esac
 echo-e $ (echo-n "$ txt" |
 hexdump-v-e '/ 1! "% 02x"' |
 sed '
 s / ' (2 [1ade]  | 3 [0-9]  | 4 [1-9a-f]  | 5 [0-9AF]  | 6 [1-9a-f]  | 7 [0 -9a] ) /   x  1 / g
 s / ' ([[: xdigit:]]  (2 )  )/'"$ replacement "' / g
 ')
 ) 

Short Test this:
Code:

  # URL encoding
 $ Urlencode "bad girls have to wash the feet too!"
 B%% 20M% f6se e4dchen% 20m% fcssen 20auch%% 20the% 20F% fc 20waschen% dfe%!

 # Crosscheck
 $ Httpd-d $ (urlencode "bad girls have to wash the feet!")
 Bad girls need to wash the feet!