MACROMEDIA FLEX-GETTING STARTED WITH FLEX Manuale Utente Scaricare il pdf (Pagina 83)

CHAPTER 5

Working with the Server

Most Flex applications

are going to work with a web server in

some shape or form. Thankfully, Flex makes this very easy to

do by providing a rich set of web service tools. In this chapter,

I’ll present two methods of accessing the server from a Flex

application, and the server code that is required to support

them.

You can access the server in a Flex application in five different

ways:

POST or GET

You can use a Flex application just as you would an HTML

form. Flex can bundle up the elements in a form and post

them to your web server application just as the browser

would. Your application won’t even know the difference.

Using HTTP services directly

In a manner similar to Ajax, you can make an HTTP re-

quest of the server, even supplying POST content, and re-

ceive the response asynchronously. That response can be

whatever flavor of data you want: text, XML, YAML,

JSON, whatever you like. For JSON data the as3corelib

library (http://code.google.com/p/as3corelib/) provides an

excellent JSON interpreter.

SOAP

Flex can access SOAP services directly using a set of Flex

classes designed specifically for that purpose.

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MACROMEDIA FLEX-GETTING STARTED WITH FLEX Manuale Utente Pagina 83