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Make the shortest proxy server.

Input/Output Specifications

Client:

  • Input: a port number (32-bit integer) (,) or (space) a url (see test cases)
  • Output: html source of the url

Server:

  • Input: port to listen to (32-bit integer)
  • Output: REC when input is received from the client, OK when finished sending the html source to the client.

Rules

  • You may make either a complete program or functions in an interpreted language.
  • Input is taken through stdin or given as a arguments.
  • Your code has to work for the given test cases only (more is optional, less is invalid).
  • The client output has to be the same as with what you get when you "view source" from a browser.
  • The server may exit after each handled request (i.e does not have to be persistent/daemon)
  • (edit) Any other input/output than what specified, is forbidden.

Test cases (client inputs)

  1. N1 https://stackoverflow.com/
  2. N2 http://en.wikipedia.org/wiki/Proxy_server
  3. N3 http://stackexchange.com/search?q=code+golf

where Ni are random integers between 1 and 2048.

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  • \$\begingroup\$ Does the server have to be reusable? Or can it be a one-shot proxy? \$\endgroup\$ Commented Mar 13, 2011 at 21:29
  • \$\begingroup\$ @Nemo: what do you mean reusable? (but I suppose the answer is "yes it can be a one-shot") \$\endgroup\$ Commented Mar 13, 2011 at 21:41
  • \$\begingroup\$ @Nemo: yes, it is ok if the server exits after a well handled request. \$\endgroup\$ Commented Mar 13, 2011 at 21:59

2 Answers 2

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ZSH - 57 + 42 characters

Server:

s=$(nc -l $1) echo REC curl -s $s|nc 127.0.0.1 $1 echo OK

Client:

echo $2|nc 127.0.0.1 $1 echo "$(nc -l $1)"

Usage:

sudo zsh server.zsh 123 sudo zsh client.zsh 123 http://stackoverflow.com/ sudo zsh client.zsh 123 http://en.wikipedia.org/wiki/Proxy_server sudo zsh client.zsh 123 "http://stackexchange.com/search?q=code+golf"
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  • \$\begingroup\$ It's been a while since I last used zsh, but can't you get rid of all the quotes (necessary for bash) when using that shell? \$\endgroup\$ Commented Mar 13, 2011 at 21:58
  • \$\begingroup\$ @idealmachine: The ones on the second line of the client I think are necessary, I was only getting the footer back from the StackExchange search. The other ones, I'm not sure about, seems to work without them though. I don't really do much scripting in zsh. \$\endgroup\$ Commented Mar 13, 2011 at 22:05
  • \$\begingroup\$ Yes, curl should be silenced (updated rules to clarify). \$\endgroup\$ Commented Mar 13, 2011 at 22:31
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Nim, 153 + 101 bytes

Server:

include httpclient proc(n=0)=(var s,c=newSocket();s.bindAddr n.Port s.listen s.accept c;echo"REC" c.send newHttpClient().getContent(c.recvLine);echo"OK")

Client:

import net proc(n=0,u=""):string=(var c=newSocket();c.connect "*",n.Port c.send u&"\n" c.recv 999999)

Usage:

let s = <server proc> s(2034) 
let c = <client proc> echo c(2034, "https://stackoverflow.com/") 
$ nim r -d:ssl server.nim & (sleep 2s; nim r client.nim)
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