Laszlo – Simple Web Service

This post shows a simple example of a Laszlo web service. It uses the xfire web service created in this post. The user enters a symbol and clicks Get Quote, laszlo makes a call to the webservice to retrieve a quote for the symbol. The laszlo documentation describes the use of soap in laszlo applications.

This is a screenshot of the laszlo page:

<canvas debug="true">

<soap name="stockquote"
  wsdl="http://localhost:8080/xfire-stockquote/services/StockQuote?wsdl">

<!-- Method to make a document for SOAP message requests -->
<method name="makegetQuoteDoc" args="symbol">
	Debug.write('Entering makegetQuoteDoc function');
<![CDATA[
    var s =  '<getStockQuote xmlns="http://localhost:8080/xfire-stockquote/services/stockQuote" ><security>'+symbol+'</security></getStockQuote>';

Debug.write(s);
    return s;
]]>
</method>

<handler name="onload">
    // make buttons visible once SOAP object is loaded
		canvas.buttons.setAttribute('visible', true);
		Debug.write('StockQuote soap service loaded');
    Debug.write('StockQuote WSDL at ' + this.wsdl);
    Debug.write('proxy:');
    Debug.inspect(this.proxy);
</handler>

<handler name="onerror" args="error">
    Debug.write('error:', error);
</handler>

<handler name="ontimeout" args="error">
    Debug.write('timeout:', error);
</handler>

<remotecall funcname="getStockQuote" >
  <param value="${ canvas.stockquote.makegetQuoteDoc(symbol.text) }" />
  <method event="ondata" args="value">
		    Debug.write("Got data!");
		    result.setText(value);
  </method>
</remotecall>

</soap>

<view name="buttons" x="10" y="10" visible="false" layout="spacing: 10" >
<text><b>Stock Quote Service</b></text>
<view layout="axis: x" ><text y="3">Symbol:</text><edittext id="symbol" text="IBM"/></view>
<view layout="axis: x" ><text>Result:</text><text id="result"/></view>

<button text="Get Quote" onclick="canvas.stockquote.getStockQuote.invoke()" />

</view>

</canvas>