MACROMEDIA FLEX-GETTING STARTED WITH FLEX Uživatelský manuál stáhnout pdf (Strana 84)

Remote objects

Flex

applications can also make use of Flash’s remoting

capabilities by using remote objects. To make this happen

the server code needs to support AMF requests. This is a

proprietary binary format. Thankfully, there are libraries

in each of the major languages to support AMF.

Directly through sockets

When all else fails you can use TCP/IP sockets directly and

support whatever binary or ASCII protocol you choose.

I’ll be showing only two examples in this chapter, but it’s im-

portant that you know just how many ways Flash and Flex can

communicate on the web.

Figure 5-1 shows how all of this fits together.

The HTML page loaded by the browser contains a reference to

the Flash SWF file that contains the Flex application. That Flex

application is loaded and run. It then makes requests directly

to the server using a variety of transport protocols.

In the remainder of this chapter, I’ll cover the POST/GET and

HTTP service methods of accessing the server. I’ll start with an

example of using the POST/GET method.

Figure 5-1. Flex-based network access

68 | Chapter 5: Working with the Server

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MACROMEDIA FLEX-GETTING STARTED WITH FLEX Uživatelský manuál Strana 84