MACROMEDIA FLASH COMMUNICATION SERVER MX-SERVER-SIDE COMMUNICATION ACTIONSCRIPT DICTIONARY Spécifications télécharger pdf (Page 101)

CHAPTER 2

About Flash Communication Server

Applications

With a few lines of code, your Macromedia Flash MX application (SWF) can communicate with

another client through the Macromedia Flash Communication Server MX. Using object-oriented

programming techniques and sound programming practices, you can write simple ActionScript

code to get started right away.

This chapter explains some ideas behind Macromedia Flash Communication Server MX and

describes the types of files you’ll generate. An overview of the ActionScript objects specific to

Flash Communication Server is also described here.

About Flash Communication Server services

You should be familiar with writing the instructions for a Flash application in a FLA file and

publishing it as a SWF file. When you run the SWF file, the Flash Player processes the

instructions. If these instructions do not include any calls to a Flash Communication Server, the

player relies on all of the technology within the player itself to execute each step. As soon as you

make a Flash Communication Server call in your ActionScript, however, the player sends that

request to the server.

After you use

new NetConnection to create an instance of the NetConnection object, the first

call you make to the server is

NetConnection.connect, which tells the player to connect to an

application on the server. The Flash Communication Server requires the use of the Real-Time

Messaging Protocol (RTMP):

my_nc = new NetConnection();

my_nc.connect("rtmp://myFlashComServer/myAppName/instanceName");

Once your Flash application issues this command (and succeeds in connecting to the server), it

has become a client-server application, and the instance of your Flash application running in the

player is referred to as the client.

Common client-server workflows

After the connection is established, the services provided by the server depend, in part, on what

the client expects. Four common scenarios are described below.

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MACROMEDIA FLASH COMMUNICATION SERVER MX-SERVER-SIDE COMMUNICATION ACTIONSCRIPT DICTIONARY Spécifications Page 101