ACTIONSCRIPT 3 Developer’s Guide en

ACTIONSCRIPT 3.0 DEVELOPER’S GUIDE
Sockets
File Description
TelnetSocket.fla
or
TelnetSocket.mxml
Telnet socket application overview
Flash Player 9 and later, Adobe AIR 1.0 and later
The main TelnetSocket.mxml file is responsible for creating the user interface (UI) for the entire application.
In addition to the UI, this file also defines two methods, login() and sendCommand(), to connect the user to the
specified server.
The following code lists the ActionScript in the main application file:
import com.example.programmingas3.socket.Telnet;
private var telnetClient:Telnet;
private function connect():void
{
telnetClient = new Telnet(serverName.text, int(portNumber.text), output);
console.title = "Connecting to " + serverName.text + ":" + portNumber.text;
console.enabled = true;
}
private function sendCommand():void
{
var ba:ByteArray = new ByteArray();
ba.writeMultiByte(command.text + "\n", "UTF-8");
telnetClient.writeBytesToSocket(ba);
command.text = "";
}
The first line of code imports the Telnet class from the custom com.example.programmingas.socket package. The
second line of code declares an instance of the Telnet class, telnetClient, that is initialized later by the connect()
method. Next, the connect() method is declared and initializes the telnetClient variable declared earlier. This
method passes the user-specified telnet server name, telnet server port, and a reference to a TextArea component on
the display list, which is used to display the text responses from the socket server. The final two lines of the connect()
method set the title property for the Panel and enable the Panel component, which allows the user to send data to
the remote server. The final method in the main application file, sendCommand(), is used to send the user's commands
to the remote server as a ByteArray object.
Telnet class overview
Flash Player 9 and later, Adobe AIR 1.0 and later
The Telnet class is responsible for connecting to the remote Telnet server and sending/receiving data.
The Telnet class declares the following private variables:
The main application file consisting of the user interface for Flex (MXML) or Flash
(FLA).
TelnetSocket.as Document class providing the user interface logic (Flash only).
com/example/programmingas3/Telnet/Telnet.as Provides the Telnet client functionality for the application, such as connecting to a
remote server, and sending, receiving, and displaying data.
Last updated 6/6/2012
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