将代理 Web 服务与 Adob​​e AIR/BlazeDS 结合使用

Question

我正在尝试使用代理调用网络服务。我在 blazeds 端的代理配置设置如下：

<destination id="ws-catalog">
    <properties>
        <wsdl>http://feeds.adobe.com/webservices/mxna2.cfc?wsdl</wsdl>
        <soap>*</soap>
    </properties>
    <adapter ref="soap-proxy"/>
</destination>

在 Adob​​e AIR 端，我的代码是：

<?xml version="1.0" encoding="utf-8"?>
<s:WindowedApplication xmlns:fx="http://ns.adobe.com/mxml/2009" 
                       xmlns:s="library://ns.adobe.com/flex/spark" 
                       xmlns:mx="library://ns.adobe.com/flex/mx"
                       creationComplete="loadConfiguration()">
    <s:layout>
        <s:VerticalLayout/>
    </s:layout>

    <fx:Script>
        <![CDATA[
            import mx.messaging.ChannelSet;
            import mx.messaging.channels.AMFChannel;
            import mx.rpc.events.FaultEvent;
            import mx.rpc.events.ResultEvent;
            [Bindable]
            private var cs:ChannelSet;

            private function loadConfiguration():void
            {
                var amfChannel:AMFChannel = new AMFChannel("my-amf", 'http://localhost:8400/messagebroker/amf');
                cs = new ChannelSet();
                cs.addChannel(amfChannel);
            }

            protected function ws_resultHandler(event:ResultEvent):void
            {
                var obj:Object = event.result;
            }

            protected function ws_faultHandler(event:FaultEvent):void
            {
                var faultObj:Object = event.fault;
            }

            protected function button1_clickHandler(event:MouseEvent):void
            {
                ws.getOperation('getFeeds').send();
            }

        ]]>
    </fx:Script>

    <fx:Declarations>
        <s:WebService id="ws" 
                      channelSet="{cs}"
                      useProxy="true" 
                      destination="ws-catalog"
                      showBusyCursor="true"
                      result="ws_resultHandler(event)"
                      fault="ws_faultHandler(event)"
                      />
    </fx:Declarations>
    <s:Button label="CallWebService" click="button1_clickHandler(event)"/>
</s:WindowedApplication>

但是现在，每当我启动 AIR 应用程序时，都会收到以下错误：

faultCode: InvokeFailed
faultDetail: Unable to load WSDL. If currently online, please verify the URI and/or format of the WSDL (null)
faultString: [MessagingError message='Destination 'ws-catalog' either does not exist or the destination has no channels defined (and the application does not define any default channels.)']

有人可以帮助我或指出类似的解决方案吗？ 谢谢。

Answer 1

请检查下面的代码。它可以在我的机器上运行。您需要等待几秒钟，getFeeds 返回大量数据。

<?xml version="1.0" encoding="utf-8"?>

<fx:Script>
    <![CDATA[
        import mx.messaging.ChannelSet;
        import mx.messaging.channels.AMFChannel;
        import mx.rpc.events.FaultEvent;
        import mx.rpc.events.ResultEvent;
        import mx.rpc.soap.LoadEvent;
        import mx.rpc.soap.mxml.*;
        import mx.rpc.wsdl.WSDLOperation;
        [Bindable]
        private var cs:ChannelSet;
        [Bindable]
        var gateway:WebService

        private function loadConfiguration():void{
            var amfChannel:AMFChannel = new AMFChannel("my-amf", 'http://localhost:8400/samples/messagebroker/amf');
            cs = new ChannelSet();
            cs.addChannel(amfChannel);
            gateway = new WebService();
            gateway.channelSet = cs;
            gateway.destination = "ws-catalog";
            gateway.useProxy = true;
            gateway.addEventListener(ResultEvent.RESULT,ws_resultHandler);
            gateway.addEventListener(FaultEvent.FAULT,ws_faultHandler);
            gateway.loadWSDL();
        }

        protected function ws_resultHandler(event:ResultEvent):void{
            var obj:Object = event.result;
            trace("ok");
        }

        protected function ws_faultHandler(event:FaultEvent):void{
            var faultObj:Object = event.fault;
            trace("nok");
            trace(faultObj);
        }

        protected function button1_clickHandler(event:MouseEvent):void{
            gateway.getFeeds();
        }


    ]]>
</fx:Script>

<s:Button label="CallWebService" click="button1_clickHandler(event)"/>

Answer 2

在不了解所有配置的情况下很难说。您可以检查以下几个原因：

- 未能在 services.xml 中声明 proxy-config.xml 文件

- 未能在项目中包含 services.xml

- 未能为您的目标声明通道

学习如何的最佳方法使用 BlazeDS 作为代理调用 Web 服务是下载 blazeds 交钥匙安装并采取看看样品。解压存档后，您可以在 blazedsrootfolder/tomcat/webapps/samples 中找到示例文件夹。您会发现一个示例显示您正在尝试做什么。