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SOAP response

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

oBuffer.append(“xmlns:xs=\”http://www.w3.org/2001/XMLSchema\” “);

oBuffer.append(“xmlns:xsi=\”http://www.w3.org/2001/XMLSchema-instance\”>”);

oBuffer.append(“<soap:Body soap:encodingStyle=”);

oBuffer.append(“\”http://schemas.xmlsoap.org/soap/encoding/\”>”);

oBuffer.append(“<n:getTemp><zipcode xsi:type=\”xs:string\”>”);

oBuffer.append(this.zipcode);

oBuffer.append(“</zipcode></n:getTemp></soap:Body></soap:Envelope>”);

return oBuffer.toString();

};

Because the SOAP request string is so long, this method uses the

StringBuffer()

object created earlier

in the book to build up the string. Note that the

zipcode

property is used here to insert the zip code in

question instead of passing it in as an argument. If the zip code is passed in as an argument, you must

rewrite the

send()

method to take this into account; this way, the

send()

method can be used as-is.

The

handleResponse()

method expects to receive a SOAP response string as its only argument. Once

again, this format can be determined by using the WSDL analyzer tool from XMethods:

<SOAP-ENV:Envelope

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

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

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

<SOAP-ENV:Body>

<ns1:getTempResponse

SOAP-ENV:encodingStyle=”http://schemas.xmlsoap.org/soap/encoding/”

xmlns:ns1=”urn:xmethods-Temperature”>

</ns1:getTempResponse>

</SOAP-ENV:Body>

</SOAP-ENV:Envelope>

Despite all the extra code, the only part of interest is what is contained within the

element.

The easiest way to extract that data from the string is to use a regular expression; there’s no need for

expensive DOM parsing and operations in this case (for more complicated Web services, however, that

may be an option). After the value is extracted, the

parseFloat()

function can be used to get the

floating-point value:

TemperatureService.prototype.handleResponse = function (sResponse) {

var oRE = /<return .*?>(.*)<\/return>/gi;

oRE.test(sResponse);

return parseFloat(RegExp[“$1”]);

};

The only thing left to do is modify the

send()

method to accept an argument (the zip code) because the

zipcode

property must be assigned for the method to function properly (remember, the

send()

method

calls

buildRequest()

, which uses the

zipcode

property to create the SOAP string).

To accomplish this, you first must create a pointer to the original

send()

method:

TemperatureService.prototype.webServiceSend = TemperatureService.prototype.send;

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Chapter 17

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