ServerSocket (Socket function)

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Get a reference to the server socket (Socket class)

This shared method obtains a reference to a Socket object for the server socket (socket number 1 in the $Sock_xxx API, as described in "Client versus Server Socket programming". It returns a reference to a Socket object instance, which can then be used with instance method calls to access the server socket. ServerSocket has no equivalent $function.

ServerSocket syntax

%socket = [%(Socket):]ServerSocket

Syntax terms

%socket A declared socket object or a reference to a Socket object.
%(Socket) The class name in parentheses denotes a virtual constructor method. See "Usage notes" below, for more information about invoking a Socket constructor.

Usage notes

  • ServerSocket is a virtual constructor and as such can be called with no method object, with an explicit class name, or with an object variable, even if that object is Null:

    %sock = ServerSocket %sock = %(Socket):ServerSocket %sock = %sock:ServerSocket

  • After ServerSocket returns, the socket is no longer accessible by its socket number (1). To access the socket by its number again, use GetSocketNumber.
  • ServerSocket can be used to obtain a Socket object reference for a socket already created by $Sock_Conn, or it can operate in an entirely object-oriented application.


In the following code fragment, a server socket receives data and replies to its client.

Begin %r Float %sepx Float %data is String len 255 %servsock is Object Socket %servsock = %(Socket):ServerSocket %r = %servsock:Set('PRSTOK', 'AMBIG|0D0A|0D|0A|07') %r = %servsock:Set('LINEND', '07') %r = %servsock:ReceiveAndParse(%data) If %r le 0 Then ... If %data eq 'Hello' Then ... %r = %servsock:SendWithLineEnd('OK') ...