Epson thermal printer javascript
I'm trying to use an Epson TM-T20II (thermal printer) via a web page. I've done the necessary configuration and the printer works fine on my network using the given software. So I downloaded the JS epos print SDK, and tried to run this sample code :
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>TITLE</title>
<script type="text/javascript" src="../ePOS-Print_SDK/ePOS-Print_SDK_150729E/JavaScript/epos-print-5.0.0.js"></script>
<script type="text/javascript">
function buildMessage() {
//Create an ePOS-Print Builder object
var builder = new epson.ePOSBuilder();
//Create a print document
builder.addTextLang('en')
builder.addTextSmooth(true);
builder.addTextFont(builder.FONT_A);
builder.addTextSize(3, 3);
builder.addText('Hello,\tWorld!\n');
builder.addCut(builder.CUT_FEED);
//Acquire the print document
var request = builder.toString();
var address = 'http://192.168.1.65/cgi-bin/epos/service.cgi?devid=99&timeout=1000';
//Create an ePOS-Print object
var epos = new epson.ePOSPrint(address);
epos.onreceive = function (res) {
//When the printing is not successful, display a message
if (!res.success) {
alert('A print error occurred');
}
}
//Send the print document
epos.send(request);
}
</script>
</head>
<body>
<button onclick='buildMessage()'>Run</button>
</body>
</html>
For the devid parameter I tried 'local_printer' which is the name of the device, then I saw in the configuration panel that the printer id is 99. Still, it doesn't work, I got a 405 Method not allowed status code on the cgi request.
Any tips ? Thanks in advance.
EDIT :
So, after some research, it seems that the problem comes from a CORS request. The request is preflight for security matters, and this preflight request doesn't pass acces control cause the 'Access-Control-Allow-Origin' header is missing from the response. So how do I set this header ?
Answer
With your edit mentioning a CORS issue, perhaps you can try running Chrome with web-security disabled. That should tell chrome to ignore the failing CORS header:
chromium-browser --disable-web-security
https://www.chromium.org/developers/how-tos/run-chromium-with-flags