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| #!/bin/bash | |
| # WebSocket shell, start & browse to http://<Host>:6655/ | |
| # Requires bash 4.x, openssl. | |
| # Author: [email protected] (which isn't me, apk) | |
| coproc d { nc -l -p 6656 -q 0; } | |
| nc -l -p 6655 -q 1 > /dev/null <<-ENDOFPAGE | |
| HTTP/1.1 200 OK | |
| <html><head><script language="javascript"> | |
| var url = location.hostname + ':' + (parseInt(location.port) + 1); | |
| var ws = new WebSocket('ws://' + url + '/test'); | |
| ws.onmessage = function(msg) { | |
| document.f.out.value += msg.data + '\n'; | |
| document.f.out.scrollTop = document.f.out.scrollHeight; | |
| } | |
| ws.onclose = function() { alert('Connection closed.'); } | |
| function send() { | |
| ws.send('' + document.f.in.value); | |
| document.f.in.value=''; | |
| } | |
| </script></head><body><form name="f"><textarea name="out" cols="100"rows="40"></textarea> | |
| <input value="" type="text" size="120" id="in" onkeypress="if(event.keyCode==13){send();return false;}" /> | |
| </form></body></html> | |
| ENDOFPAGE | |
| until read line; line=`tr -d '\r\n'<<<$line`; test -z "$line"; do | |
| test "${line:0:18}" = "Sec-WebSocket-Key:" && key=${line:19} | |
| test "${line:0:22}" = "Sec-WebSocket-Version:" && ver=$line | |
| done <&${d[0]} | |
| rkey=`echo -n ${key}258EAFA5-E914-47DA-95CA-C5AB0DC85B11|openssl dgst -sha1 -binary|base64` | |
| echo -ne "HTTP/1.1 101 Switching Protocols\r\n" >&${d[1]} | |
| echo -ne "Upgrade: websocket\r\nConnection: Upgrade\r\n" >&${d[1]} | |
| echo -ne "Sec-WebSocket-Accept: $rkey\r\n$ver\r\n\r\n" >&${d[1]} | |
| doasync() { | |
| bash -c "$1" | while read line; do | |
| while [ "${#line}" -gt 0 ]; do | |
| l2=${line:0:80} | |
| len=`echo -n "$l2" | wc -c | tr -d ' '` | |
| echo -ne "\x81\x`printf '%02x' $len`$l2" | |
| line=${line:80} | |
| done | |
| done & | |
| } | |
| while true; do | |
| reclen=$((`od -j 1 -N 1 -t dI -A n <&${d[0]}` - 128)) | |
| for i in `seq 0 3`; do | |
| mk[$i]=`od -N 1 -t dI -A n <&${d[0]}` | |
| done | |
| msg="" | |
| for i in `seq 0 $(($reclen - 1))`; do | |
| bt=`od -N 1 -t dI -A n <&${d[0]}` | |
| bt=$(($bt ^ ${mk[$(($i % 4))]})) | |
| msg="$msg$(echo -e "\x`printf '%02x' $bt`")" | |
| done | |
| test "$msg" = "exit" && break | |
| doasync "$msg" >&${d[1]} | |
| done | |
| echo >&${d[1]}- |
simply the most amazing bash script that a saw in 12 years !!!
tried it and it worked perfectly! congrats!!
I just linked your page from our blog article http://blog.pointsoftware.ch/index.php/websocket-versus-comet-real-time-web-applications-2/
who is the author "rootshell" ?
cheers
francois scheurer
Awesome!
Have no luck with archlinux
Error message:
websock.sh: line 49: ${d[0]}: ambiguous redirect
websock.sh: line 58: ${d[1]}: ambiguous redirect
websock.sh: line 47: ${d[0]}: ambiguous redirect
I should mention that a) I don't get notification for comments here, and b) that wasn't my code. A colleague passed to to me; I only have the email address of the (apparent) original author.
And linux and macos are very different in their understanding of nc.
Ditto re: error. I am using CentOS v6.
simply the most amazing bash script that a saw in 12 years !!!
+1 !
Say "thank you for the masterpiece" to the original author
The coproc d { nc -l -p 6656 -q 0; } line yields this error with respect to nc
nc: invalid option -- 'q'
I'm using nc version 1.84-22.7. and bash, version 4.1.2(1)-release.
Which version of nc are you using?