Epson TM-T20II-i ePOS-Print XML Users Manual - Page 53

Checking the Printer Status, Programming Guide XML Print Service

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Chapter 3 Programming Guide (XML Print Service) Checking the Printer Status To check the printer status without printing, send empty print data. Refer to the following program. //Set the end point address var url = 'http://192.168.192.168/cgi-bin/epos/service.cgi?devid=local_printer &timeout=10000'; //Create an empty print document to check the printer status var soap = ''; //Create an XMLHttpRequest object var xhr = new XMLHttpRequest(); // xhr.open('POST', url, true); // xhr.setRequestHeader('Content-Type', 'text/xml; charset=utf-8'); xhr.setRequestHeader('If-Modified-Since', 'Thu, 01 Jan 1970 00:00:00 GMT'); xhr.setRequestHeader('SOAPAction', '""'); //Set a response reception callback function for checking xhr.onreadystatechange = function () { if (xhr.readyState == 4){ if (xhr.status == 200){ var res = xhr.responseXML; var success = res.getElementsByTagName('response')[0].getAttribute('success'); if (!/^(1|true)$/.test(success)) { alert('Success'); } 3 } } }; //Send empty print data xhr.send(soap); 53

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53
Chapter 3
Programming Guide (XML Print Service)
3
Checking the Printer Status
To check the printer status without printing, send empty print data.
Refer to the following program.
//Set the end point address
&timeout=10000';
//Create an empty print document to check the printer status
var soap = '<?xml version="1.0" encoding="UTF-8"?><s:Envelope xmlns:s="http://
schemas.xmlsoap.org/soap/envelope/" ><s:Body><epos-print xmlns="http://
www.epson-pos.com/schemas/2011/03/epos-print"/></s:Body></s:Envelope>';
//Create an XMLHttpRequest object
var xhr = new XMLHttpRequest();
//<Open an XMLHttpRequest object>
xhr.open('POST', url, true);
//<Header settings>
xhr.setRequestHeader('Content-Type', 'text/xml; charset=utf-8');
xhr.setRequestHeader('If-Modified-Since', 'Thu, 01 Jan 1970 00:00:00 GMT');
xhr.setRequestHeader('SOAPAction', '""');
//Set a response reception callback function for checking
xhr.onreadystatechange = function () {
if (xhr.readyState == 4){
if (xhr.status == 200){
var res = xhr.responseXML;
var success = res.getElementsByTagName('response')[0].getAttribute('success');
if (!/^(1|true)$/.test(success)) {
alert('Success');
}
}
}
};
//Send empty print data
xhr.send(soap);