TCP Test server

This small app implements controllable TCP server for testing connection failures. Behavior is controlled by request text. Server executes actions defined in request or in command line parameter over the client socket.

Format of actions list

Request must contain action set:

ACT["set"]

set ::= "" | action[=param][,action[=param]]...

After executing all actions connection is left active. If set is empty, server just does nothing with the connection

action:

• CLOSE - close connection
• DATA=length - write length of random data
• SEND=resp - write resp string (URL-encoding is supported)
• WAIT=time - wait for time msecs
• SHUT - stop the server from listening (won't close active connections)

Any combination and order of actions is allowed.

Request could contain any other characters besides action set:

GET /ACT[SEND=HTTP/1.1 200 OK%0D%0A%0D%0A] HTTP/1.1
Host: localhost
...

or even

GET /foo HTTP/1.1
Host: localhost
X-Act: ACT[SEND=HTTP/1.1 200 OK%0D%0A%0D%0A]
...

Example

Connect to server and send following text:

ACT[SEND=Hello!%0D%0A,DATA=1000,WAIT=1000,CLOSE]

Server will respond with Hello!\r\n, 1000 bytes of random data, then wait for 1000 msecs and then close connection.

Command line arguments

>node <scriptname.js> [port] [actionset]

• -?, -h, /? - print usage and exit
• port - port number to listen. Default is 11111
• actionset - global set or actions for all clients