engine.io capture

####
T 172.31.22.82:46389 -> 172.31.17.27:3000 [AP]
GET /engine.io/?EIO=2&transport=polling HTTP/1.1.
User-Agent: node-XMLHttpRequest.
Accept: */*.
Host: 172.31.17.27:3000.
Connection: close.
.

##
T 172.31.17.27:3000 -> 172.31.22.82:46389 [AP]
HTTP/1.1 200 OK.
Content-Type: text/plain; charset=UTF-8.
Content-Length: 115.
Access-Control-Allow-Origin: *.
Set-Cookie: io=cddLlKPaUW9YENqZAAAF.
Date: Thu, 30 Jan 2014 19:08:09 GMT.
Connection: close.
.
111:0{"sid":"cddLlKPaUW9YENqZAAAF","upgrades":["websocket","flashsocket"],"pingInterval":25000,"pingTimeout":60000}
###########
T 172.31.22.82:46390 -> 172.31.17.27:3000 [AP]
GET /engine.io/?EIO=2&transport=websocket&sid=cddLlKPaUW9YENqZAAAF HTTP/1.1.
Connection: Upgrade.
Upgrade: websocket.
Host: 172.31.17.27:3000.
Origin: 172.31.17.27:3000.
Sec-WebSocket-Version: 13.
Sec-WebSocket-Key: MTMtMTM5MTEwODg4OTc4Ng==.
.

##
T 172.31.22.82:46391 -> 172.31.17.27:3000 [AP]
GET /engine.io/?EIO=2&transport=polling&sid=cddLlKPaUW9YENqZAAAF HTTP/1.1.
User-Agent: node-XMLHttpRequest.
Accept: */*.
Host: 172.31.17.27:3000.
Connection: close.
.

##
T 172.31.17.27:3000 -> 172.31.22.82:46390 [AP]
HTTP/1.1 101 Switching Protocols.
Upgrade: websocket.
Connection: Upgrade.
Sec-WebSocket-Accept: 4aoicj7rsiFIua8geVVT8GiNY0w=.
.

##
T 172.31.22.82:46390 -> 172.31.17.27:3000 [AP]
............
#
T 172.31.17.27:3000 -> 172.31.22.82:46390 [AP]
..3probe
##
T 172.31.17.27:3000 -> 172.31.22.82:46391 [AP]
HTTP/1.1 200 OK.
Content-Type: text/plain; charset=UTF-8.
Content-Length: 3.
Access-Control-Allow-Origin: *.
Set-Cookie: io=cddLlKPaUW9YENqZAAAF.
Date: Thu, 30 Jan 2014 19:08:09 GMT.
Connection: close.