The following example demonstrates a very simple usage of sending parameters from Flex to a server-side script (written in ColdFusion) and then displaying the server response in our Flex application. The server-side script is a simple echo/”Hello world” type script, but it accepts URL or FORM variables, so you can send using the GET or POST HTTP-method.
It’s a pretty basic/crude example, but maybe it helps somebody out there.
Full code after the jump.
<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2007/08/16/using-httpservice-tag-to-sendreceive-variables-to-a-server-side-script/ -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
layout="vertical"
creationComplete="httpService.send(myObj);">
<!-- Parameters to send to remote script. -->
<mx:Object id="myObj" name="peterd" />
<mx:HTTPService id="httpService"
url="http://www.flash-mx.com/mm/greeting.cfm"
method="POST"
resultFormat="flashvars" />
<mx:Label text="{httpService.lastResult.welcomeMessage}" />
</mx:Application>
View source is enabled in the following example.
By popular request, here is the ColdFusion source code as well.
http://www.flash-mx.com/mm/greeting.cfm
<cfsilent>
<cfsetting enablecfoutputonly="Yes">
<cfif IsDefined("URL.name")><cfset Form.Name = URL.name /></cfif>
<cfif NOT IsDefined("Form.name") OR Len(Trim(Form.Name)) EQ 0>
<cfset Form.Name = "[Mysterious Stranger]" />
</cfif>
</cfsilent><cfcontent reset="true" /><cfoutput>welcomeMessage=#UrlEncodedFormat("Welcome, "&Form.name)#</cfoutput>
<cfsetting enablecfoutputonly="No">
{ 9 comments… read them below or add one }
hi! nice to see this app
How do I have to different buttons, instead of putting this code (ie., click=”xmlRPC.send();” ). I want to call 2 different functions. One will pass hidden textinput field value as “1″ or “2″. This will tell CFMX to one of the 2 given CFC. httpservice calls a cfm page which cfinvokes one of the 2 cfc’s. httpservice use “POST” method.
Hi! Do you have the .cfm file? Is it possible if i take a look? Because i’m having problem how to write it.
Mas,
I updated the entry above, hope that helps.
Peter
Hello Peter,
Do you feel this would be a good way to send variables triggered by Cue Points in a flash video. I want to set a coupel cue points in a flash video and when they are triggered send a message that eventually chages out content in a HTML document.
IE Content specific information…similiar to what you expect from CC but rich media.
So a flash or Flex player is playing laong, hits a Cue Point which triggers my object and passes it a URL string. As above it sends it via MyObj to a MySQL database in my case. Then a JS object is listening for the object and populates a given content area with a SWF, JPG, Text or whatever that is in the data row…
Am I on the right track? I have been trying to run this down for a week…spent all last night reading up on External Class…
This has been a trying experience to fully understand how HTTPService and the supporting RPC (remote procedure call) classes operate. For those of you still having trouble, here is a solution I got working in Flex 3 returning simple XML after sending a login form using the POST method. It’s server side language independent.
<?xml version="1.0" encoding="utf-8"?> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute"> <mx:Script> <![CDATA[ import mx.rpc.events.ResultEvent; import mx.rpc.events.FaultEvent; private function loginResult(event:ResultEvent):void{ // HTTP Service Succeeded trace("Success " + event.type); } private function loginFault(event:FaultEvent):void{ // HTTP Service Failed trace(event.type); trace(event.fault); } ]]> </mx:Script> <!-- resultFormat="e4x" was a huge step forward for me In this example my server receives the POST form variables email and password and validates the user to return the user_id and email_address . The output from the server page that was POSTed to returns the following exactly as it is here: <results> <user_id><![CDATA[ 1 ]]></user_id> <email_address><![CDATA[ dylan.valade@pinelakedesign.com ]]></email_address> </results> --> <mx:HTTPService resultFormat="e4x" method="POST" fault="loginFault(event)" result="loginResult(event)" url="https://www.yourdomain.com/login/" id="loginService" > <mx:request> <email>{email.text}</email> <password>{password.text}</password> </mx:request> </mx:HTTPService> <mx:VBox> <mx:TextInput id="email" text="dylan.valade@pinelakedesign.com" /> <mx:TextInput id="password" text="secret" /> <mx:Button click="loginService.send();" label="Login" /> <mx:Text id="resultText" text="Result From Server: {loginService.lastResult.email_address}" > </mx:Text> </mx:VBox> </mx:Application>Dylan-
Thanks for example.
Few ways in which variable can be passed to flex –mainly foccused for http request variables
http://blog.flexexamples.com/2007/08/16/using-httpservice-tag-to-sendreceive-variables-to-a-server-side-script/
Peter/Dylan-
Thanks for example.
Few ways in which variable can be passed to flex –mainly foccused for http request variables
http://yasob.blogspot.com/2009/05/accessing-http-request-parameter-in.html
I need to say this: THANKS!!!… I’ve been trying so hard to find out how to get a single result from an xml text recieved by a servlet, on flex, and I finally found your example and IT WORKS!!! I’m so excited that I really want to thank you… BIG help!!