Epson TM-T20II-i ePOS-Print XML Users Manual - Page 51

Reception of Print Result, A print error occurred

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Chapter 3 Programming Guide (XML Print Service) Reception of Print Result Set a callback function using the response root element (p. 63) to receive print results. The following information is obtained: ❏ Print result ❏ Error code ❏ Printer status ❏ Printer's battery status The printer status can be obtained when communication with the printer is possible. Refer to the following program. For the details about how to program a callback function in detail, refer to Error handling (p.52). TITLE function sendDocument() { //Create a print document var request = ''; request += ''; 3 request += ''; request += 'Hello, World! '; request += ''; request += ''; //Create a SOAP envelop var soap = '' +  ' ' + request + ''; //Create an XMLHttpRequest object var xhr = new XMLHttpRequest(); //Set the end point address var url = 'http://192.168.192.168/cgi-bin/epos/ service.cgi?devid=local_printer&timeout=10000'; //Open an XMLHttpRequest object 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 callback function xhr.onreadystatechange = function () { if (xhr.readyState == 4) { if (xhr.status == 200) { //Obtain the response root element var res = xhr.responseXML; var success = res.getElementsByTagName('response')[0].getAttribute('success'); //When the printing is not successful, display a message if (!/^(1|true)$/.test(success)) { alert('A print error occurred'); } } } // Send print document xhr.send(soap); } Callback function for print result reception 51

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51
Chapter 3
Programming Guide (XML Print Service)
3
Reception of Print Result
Set a callback function using the response root element (
p. 63
) to receive print results.
The following information is obtained:
❏
Print result
❏
Error code
❏
Printer status
❏
Printer's battery status
Refer to the following program. For the details about how to program a callback function in detail, refer to
Error handling (p.52)
.
The printer status can be obtained when communication with the printer is possible.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>TITLE</title>
<script type="text/javascript">
function sendDocument() {
//Create a print document
request += '<text lang="en" smooth="true"/>';
request += '<text font="font_a"/>';
request += '<text width="3" height="3">Hello, World!&#10;</text>';
request += '<cut type="feed"/>';
request += '</epos-print>';
//Create a SOAP envelop
var soap = '<?xml version="1.0" encoding="utf-8"?>' +
<s:Body>' + request + '</s:Body></s:Envelope>';
//Create an XMLHttpRequest object
var xhr = new XMLHttpRequest();
//Set the end point address
service.cgi?devid=local_printer&timeout=10000';
//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 callback function
xhr.onreadystatechange = function () {
if (xhr.readyState == 4) {
if (xhr.status == 200) {
//Obtain the response root element
var res = xhr.responseXML
;
var success = res.getElementsByTagName('response')[0].getAttribute('success');
//When the printing is not successful, display a message
if (!/^(1|true)$/.test(success)) {
alert(
'A print error occurred'
);
}
}
}
// Send print document
xhr.send(soap);
}
</script>
</head>
<body>
</body>
</html>
Callback function for print
result reception