How to use qz-tray - 7 common examples
To help you get started, we’ve selected a few qz-tray examples, based on popular ways it is used in public projects.
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qzind / tray / assets / signing / sign-message.ts View on Github 
import { Component } from '@angular/core';
import * as qz from 'qz-tray';
import { sha256 } from 'js-sha256';
import { KJUR, KEYUTIL, stob64, hextorstr } from 'jsrsasign';
qz.security.setCertificatePromise((resolve, reject) => {
fetch("assets/digital-certificate.txt", {cache: 'no-store', headers: {'Content-Type': 'text/plain'}})
.then(data => resolve(data.text()));
});
/*
* Client-side using jsrsasign
*/
qz.security.setSignatureAlgorithm("SHA512"); // Since 2.1
qz.security.setSignaturePromise(hash => {
return (resolve, reject) => {
fetch("assets/private-key.pem", {cache: 'no-store', headers: {'Content-Type': 'text/plain'}})
.then(wrapped => wrapped.text())
.then(data => {
var pk = KEYUTIL.getKey(data);
var sig = new KJUR.crypto.Signature({"alg": "SHA512withRSA"}); // Use "SHA1withRSA" for QZ Tray 2.0 and older
sig.init(pk);
sig.updateString(hash);
var hex = sig.sign();
console.log("DEBUG: \n\n" + stob64(hextorstr(hex)));
resolve(stob64(hextorstr(hex)));
})
.catch(err => console.error(err));
};
});// # functions. #
// # #
// # Organizations that do not protect against un- #
// # authorized signing will be black-listed to prevent #
// # software piracy. #
// # #
// # -QZ Industries, LLC #
// # #
// #########################################################
import { Component } from '@angular/core';
import * as qz from 'qz-tray';
import { sha256 } from 'js-sha256';
import { KJUR, KEYUTIL, stob64, hextorstr } from 'jsrsasign';
qz.security.setCertificatePromise((resolve, reject) => {
fetch("assets/digital-certificate.txt", {cache: 'no-store', headers: {'Content-Type': 'text/plain'}})
.then(data => resolve(data.text()));
});
/*
* Client-side using jsrsasign
*/
qz.security.setSignatureAlgorithm("SHA512"); // Since 2.1
qz.security.setSignaturePromise(hash => {
return (resolve, reject) => {
fetch("assets/private-key.pem", {cache: 'no-store', headers: {'Content-Type': 'text/plain'}})
.then(wrapped => wrapped.text())
.then(data => {
var pk = KEYUTIL.getKey(data);
var sig = new KJUR.crypto.Signature({"alg": "SHA512withRSA"}); // Use "SHA1withRSA" for QZ Tray 2.0 and older
sig.init(pk);/*
* Preferred, from a secure controller
*
qz.security.setSignaturePromise(hash => {
return (resolve, reject) => {
fetch("/path/to/controller?request=" + hash, {cache: 'no-store', headers: {'Content-Type': 'text/plain'}})
.then(wrapped => wrapped.text())
.then(data => resolve(data))
.catch(err => console.error(err));
});
};
});
*/
qz.api.setSha256Type(data => sha256(data));
qz.api.setPromiseType(resolver => new Promise(resolver));
qz.websocket.connect()
.then(qz.printers.getDefault)
.then(printer => console.log("The default printer is: " + printer))
.then(qz.websocket.disconnect)
.catch(err => console.error(err));
@Component({
selector: 'app-root',
templateUrl: './app.component.html',
styleUrls: ['./app.component.css']
})
export class AppComponent {
title = 'QZ Tray AngularJS Signing';
}/*
* Preferred, from a secure controller
*
qz.security.setSignaturePromise(hash => {
return (resolve, reject) => {
fetch("/path/to/controller?request=" + hash, {cache: 'no-store', headers: {'Content-Type': 'text/plain'}})
.then(wrapped => wrapped.text())
.then(data => resolve(data))
.catch(err => console.error(err));
});
};
});
*/
qz.api.setSha256Type(data => sha256(data));
qz.api.setPromiseType(resolver => new Promise(resolver));
qz.websocket.connect()
.then(qz.printers.getDefault)
.then(printer => console.log("The default printer is: " + printer))
.then(qz.websocket.disconnect)
.catch(err => console.error(err));
@Component({
selector: 'app-root',
templateUrl: './app.component.html',
styleUrls: ['./app.component.css']
})
export class AppComponent {
title = 'QZ Tray AngularJS Signing';
}*
qz.security.setSignaturePromise(hash => {
return (resolve, reject) => {
fetch("/path/to/controller?request=" + hash, {cache: 'no-store', headers: {'Content-Type': 'text/plain'}})
.then(wrapped => wrapped.text())
.then(data => resolve(data))
.catch(err => console.error(err));
});
};
});
*/
qz.api.setSha256Type(data => sha256(data));
qz.api.setPromiseType(resolver => new Promise(resolver));
qz.websocket.connect()
.then(qz.printers.getDefault)
.then(printer => console.log("The default printer is: " + printer))
.then(qz.websocket.disconnect)
.catch(err => console.error(err));
@Component({
selector: 'app-root',
templateUrl: './app.component.html',
styleUrls: ['./app.component.css']
})
export class AppComponent {
title = 'QZ Tray AngularJS Signing';
}fetch("/path/to/controller?request=" + hash, {cache: 'no-store', headers: {'Content-Type': 'text/plain'}})
.then(wrapped => wrapped.text())
.then(data => resolve(data))
.catch(err => console.error(err));
});
};
});
*/
qz.api.setSha256Type(data => sha256(data));
qz.api.setPromiseType(resolver => new Promise(resolver));
qz.websocket.connect()
.then(qz.printers.getDefault)
.then(printer => console.log("The default printer is: " + printer))
.then(qz.websocket.disconnect)
.catch(err => console.error(err));
@Component({
selector: 'app-root',
templateUrl: './app.component.html',
styleUrls: ['./app.component.css']
})
export class AppComponent {
title = 'QZ Tray AngularJS Signing';
}qz.security.setSignaturePromise(hash => {
return (resolve, reject) => {
fetch("/path/to/controller?request=" + hash, {cache: 'no-store', headers: {'Content-Type': 'text/plain'}})
.then(wrapped => wrapped.text())
.then(data => resolve(data))
.catch(err => console.error(err));
});
};
});
*/
qz.api.setSha256Type(data => sha256(data));
qz.api.setPromiseType(resolver => new Promise(resolver));
qz.websocket.connect()
.then(qz.printers.getDefault)
.then(printer => console.log("The default printer is: " + printer))
.then(qz.websocket.disconnect)
.catch(err => console.error(err));
@Component({
selector: 'app-root',
templateUrl: './app.component.html',
styleUrls: ['./app.component.css']
})
export class AppComponent {
title = 'QZ Tray AngularJS Signing';
}qz-tray
Connects a web client to the QZ Tray software. Enables printing and device communication from javascript.
