MACROMEDIA FLASH REMOTING MX-USING FLASH REMOTING FOR FLASH MX 2004 ACTIONSCRIPT 2.0 Spezifikationen PDF herunterladen (Seite 33)

This is the Title of the Book, eMatter Edition

Hello World

If you see only a blank screen, view the page’s source in your browser (using View ➝

Source in Internet Explorer, for example). If you receive an error, correct any errors

identified by the error message and try again. Like any URL, the web service URL

may be cached depending on the browser settings, so you should reload/refresh the

page to make sure the browser isn’t using the cached version. This web service can

also be seen at the author’s site at:

http://www.flash-remoting.com/oreilly/com/helloworld.cfc?wsdl

Switch to Flash and change the

myServicePath variable to point to the web service’s

WSDL file. If you are using the CFC to create the web service, the path will be:

var myServicePath = "http://yourservername/com/oreilly/frdg/HelloWorld.cfc?wsdl";

Test your movie, and you should see the output from the sayHello( ) method of the

web service. Although our web service is on the same server as the Flash Remoting

gateway, Flash Remoting is simply acting as a gateway when accessing an XML-

based (SOAP-compliant) web service. The web service can be on any computer

accessible via the network or the Internet.

When working with Flash Remoting and web services, you are not limited to ASP.NET,

ColdFusion, PHP, and J2EE. Web services can be implemented in:

• Python or Perl

• C or C++

• Any other language that has a SOAP library implementation

More information on web services can be found at:

http://www.xml.com/webservices

Overview

The Hello World example, while simple, illustrates the power of using Flash Remot-

ing. The core client-side ActionScript code is the same, regardless of the language or

server model that the remote service is written in. At most, only the path to the Flash

Remoting gateway or remote service is different.

Furthermore, none of the server-side code is Flash-specific. This means that you can

create libraries of functions that work from the server-side languages, for use with-

out Flash, which can also be called directly from Flash. In many cases, you will be

able to integrate a Flash front end with existing server-side code and libraries with lit-

tle or no changes on the server. (Details and exceptions are covered throughout the

rest of the book.)

Isolation between server-side and client-side code allows for a clean division of labor.

Server-side developers need not worry about what is calling their code; if there is a

well-defined API on the server, Flash developers can seamlessly hook into the server-

side code. Similarly, the Flash developer need not worry about the details of the

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MACROMEDIA FLASH REMOTING MX-USING FLASH REMOTING FOR FLASH MX 2004 ACTIONSCRIPT 2.0 Spezifikationen Seite 33