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Temperature Service

var oService = new WebService();

var vResult = oService.send();

alert(“Service returned “ + vResult);

This object, of course, doesn’t have enough information to be used on its own. However, it can be used

to create a wrapper for any other Web service.

The Temperature Service

Once again, it’s time to take a look at the Temperature Service. To do this, the

TemperatureService

object inherits from

WebService

and defines both the

url

and

action

properties:

function TemperatureService() {

WebService.apply(this);

this.url = “http://services.xmethods.net:80/soap/servlet/rpcrouter”;

this.zipcode = “”;

}

TemperatureService.prototype = new WebService();

Remember that the SOAP action for the Temperature Service is actually an empty string, so the default

value (inherited from

WebService

) is fine. A new property, zipcode, is used to store the zip code to check.

For the

buildRequest()

method, you first determine the format for the SOAP request. This can easily

be done for any Web service by using the WSDL analyzer tool available at XMethods (

http://www

.xmethods.net/ve2/Tools.po

). These methods enable you to see the request and response formats

for any Web service with a WSDL file.

The SOAP request for the Temperature Service looks like this:

<soap:Envelope xmlns:n=”urn:xmethods-Temperature”

xmlns:soap=”http://schemas.xmlsoap.org/soap/envelope/”

xmlns:soapenc=”http://schemas.xmlsoap.org/soap/encoding/”

xmlns:xs=”http://www.w3.org/2001/XMLSchema”

xmlns:xsi=”http://www.w3.org/2001/XMLSchema-instance”>

<soap:Body soap:encodingStyle=”http://schemas.xmlsoap.org/soap/encoding/”>

<n:getTemp>

<!--

zipcode here

-->

</zipcode>

</n:getTemp>

</soap:Body>

</soap:Envelope>

A whole lot of information is contained in this simple SOAP request, but the important line (which is

highlighted) is where the zip code should be entered. The

buildRequest()

method must create this

SOAP string with the zip code inserted:

TemperatureService.prototype.buildRequest = function () {

var oBuffer = new StringBuffer();

oBuffer.append(“<soap:Envelope xmlns:n=\”urn:xmethods-Temperature\” “);

oBuffer.append(“xmlns:soap=\”http://schemas.xmlsoap.org/soap/envelope/\” “);

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Web Services

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