Build a simple proxy

Question

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 N_i are random integers between 1 and 2048.

• Nemo157: Does the server have to be reusable? Or can it be a one-shot proxy?
• Eelvex: @Nemo: what do you mean reusable? (but I suppose the answer is "yes it can be a one-shot")
• Eelvex: @Nemo: yes, it is ok if the server exits after a well handled request.

Answer 1

ZSH - 57 + 42 characters

Server:

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

Client:

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

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"

• PleaseStand: 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?
• Nemo157: @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.
• Eelvex: Yes, curl should be silenced (updated rules to clarify).

Answer 2

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)