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145
4N.html
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<!DOCTYPE html>
<html>
<head>
<title>Qlogic Device User</title>
</head>
<body>
<div class="container">
<div id="messagesList">
</div>
<div>
<div>BCR Data:</div>
<div>
<textarea style="background-color: white" disabled=disabled id="BC-data" rows="5" cols="85"></textarea>
</div>
</div>
<div>&nbsp;</div>
<div>
<div>OCR Data:</div>
<div>
<textarea style="background-color: white" disabled=disabled id="OC-data" rows="3" cols="85"></textarea>
</div>
</div>
<div>&nbsp;</div>
<div>
<div>Boarding Pass Data:</div>
<div>
<textarea id="BP-data" rows="14" cols="85"></textarea>
</div>
<div>
<input id="BP-send" type="button" value="Send" />
</div>
</div>
<div>&nbsp;</div>
<div>
<div>Bag Tag Data:</div>
<div>
<textarea id="BT-data" rows="12" cols="85"></textarea>
</div>
<div>
<input id="BT-send" type="button" value="Send" />
</div>
</div>
</div>
<!--Script references. -->
<script src="Scripts/jquery-3.7.1.min.js"></script>
<!-- Library required for SignalR Framework client -->
<script src="Scripts/jquery.signalR-2.4.3.min.js"></script>
<!-- Library required for SignalR Core client -->
<script src="Scripts/signalr.min.js"></script>
<!-- Wrapper that automatically implements the SignalR client that is compatible with the server -->
<script src="Scripts/qlogic-signal.js"></script>
<script type="text/javascript">
//
// QSS API callback class used to handle connection events (not required)
//
class QssApiCallback {
framework_starting() {
console.log('QSS Framework API: starting');
}
framework_received(data) {
console.log('QSS Framework API: received.');
}
framework_connectionSlow() {
console.warn('QSS Framework API: connectionSlow');
}
framework_reconnecting() {
console.warn('QSS Framework API: reconnecting');
}
framework_reconnected() {
console.log('QSS Framework API: reconnected');
}
framework_stateChanged(change) {
let oldStateStr = SIGNALR_CONNECTION_STATE_LABEL[change.oldState];
let newStateStr = SIGNALR_CONNECTION_STATE_LABEL[change.newState];
console.log('QSS Framework API: stateChanged - oldState:'
+ oldStateStr + '; newState:' + newStateStr);
}
framework_disconnected() {
console.warn('QSS Framework API: disconnected');
}
core_onreconnecting(error) {
if (error) {
console.error('QSS Core API: onreconnecting - Reconnecting after error:',
error);
} else {
console.log('QSS Core API: onreconnecting - Reconnecting');
}
}
core_onreconnected(connectionId) {
console.log('QSS Core API: onreconnected - Connection ID: ' + connectionId);
}
core_onclose(error) {
if (error) {
console.error('QSS Core API: onclose - Closed due to an error:', error);
} else {
console.log('QSS Core API: onclose - Closed gracefully.');
}
}
}
// Initialize the client wrapper so that it can be used to make server-side calls and register
// client-side listeners.
$(document).ready(async function () {
// QSS API: set up API wrapper and connect
const qssApiCallback = new QssApiCallback();
await startSignalR(qssApiCallback);
// QSS API: server-side calls
$('#BP-send').on('click', function (event) {
const data = $('#BP-data').val();
console.info(data);
QSS_API_WRAPPER.invokeServerMethod('SendPrinterData', 'BP', data);
event.preventDefault();
});
$('#BT-send').on('click', function (event) {
const data = $('#BT-data').val();
console.info(data);
QSS_API_WRAPPER.invokeServerMethod('SendPrinterData', 'BT', data);
event.preventDefault();
});
// QSS API: register client-side listeners
if (QSS_API_WRAPPER.connection !== null) {
QSS_API_WRAPPER.onClientMethod('OnReaderDataReceived', function (deviceType, data) {
if (deviceType == 'BC') {
$('#BC-data').append(data);
} else {
$('#OC-data').append(data);
}
});
}
});
</script>
</body>
</html>

8
README.md
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# signal-code-samples # signal-code-samples
## Instructions
See **4N.html** for sample code that demonstrates how to include the required libraries and use the client wrapper provided in **qlogic-signal.js**.
* JavaScript includes:
* JQuery
* JQuery SignalR (for Framework API)
* Microsoft's SignalR (for Core API)
* qlogic-signal.js (wraps Framework and Core clients)

20
internal_notes.md
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# Internal Notes
## Created hard links to share files between projects
```
PS C:\Users\brian\source\repos\qlogic\signal-code-samples> New-Item -Itemtype HardLink -Path qlogic-signal.js -Target C:\Users\brian\source\repos\qlogic\signal-lib-dotnetframework\samples\DeviceUserWebApp\Scripts\qlogic-signal.js
Directory: C:\Users\brian\source\repos\qlogic\signal-code-samples
Mode LastWriteTime Length Name
---- ------------- ------ ----
-a--- 3/30/2026 8:29 PM 5244 qlogic-signal.js
PS C:\Users\brian\source\repos\qlogic\signal-code-samples> New-Item -Itemtype HardLink -Path 4N.html -Target C:\Users\brian\source\repos\qlogic\signal-lib-dotnetframework\samples\DeviceUserWebApp\4N.html
Directory: C:\Users\brian\source\repos\qlogic\signal-code-samples
Mode LastWriteTime Length Name
---- ------------- ------ ----
-a--- 3/30/2026 8:31 PM 11172 4N.html
```

167
qlogic-signal.js
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"use strict";
// Convert querystring name/value pairs into dictionary.
const QUERY_STRING = (function (a) {
if (a == '') return {};
const b = {};
for (let i = 0; i < a.length; ++i) {
const p = a[i].split('=', 2);
if (p.length == 1)
b[p[0]] = '';
else
b[p[0]] = decodeURIComponent(p[1].replace(/\+/g, ' '));
}
return b;
})(window.location.search.substr(1).split('&'));
function onReaderDataReceived(deviceType, data) {
console.log(data + '\n' + hexView(data));
}
// Name of group that the client will join on connection
const QSS_GROUP_NAME = 'DeviceUsers';
const SIGNALR_CONNECTION_STATE_LABEL = {
0: 'Connecting',
1: 'Connected',
2: 'Reconnecting',
4: 'Disconnected'
};
// A unified wrapper to handle both Framework and Core SignalR APIs.
const QSS_API_WRAPPER = {
connection: null,
type: null, // 'framework' or 'core'
deviceHubProxy: null, // only populated in 'framework'
// Map a server-side call
invokeServerMethod: function (methodName, ...args) {
if (this.type === 'framework') {
// Framework API call
return this.deviceHubProxy.invoke(methodName, ...args);
} else {
// Core API call
return this.connection.invoke(methodName, ...args);
}
},
// Map a client-side listener
onClientMethod: function (methodName, callback) {
if (this.type === 'framework') {
// Framework client-side listener
this.deviceHubProxy.on(methodName, callback);
} else {
// Core client-side listener
this.connection.on(methodName, callback);
}
}
};
function isNullEmptyOrWhitespace(value) {
if (value == null) {
return true;
}
if (typeof value === 'string') {
return value.trim().length === 0;
}
return false;
}
async function startSignalR(callback) {
if (!('qssUrl' in QUERY_STRING) || isNullEmptyOrWhitespace(QUERY_STRING['qssUrl'])) {
console.warn('Missing "qssUrl" in query string');
return;
}
console.log('Attempting SignalR ASP.NET Framework connection...');
//
// ASP.NET Framework
//
QSS_API_WRAPPER.connection = $.hubConnection(QUERY_STRING['qssUrl'], { useDefaultPath: false });
QSS_API_WRAPPER.deviceHubProxy = QSS_API_WRAPPER.connection.createHubProxy('deviceHub');
// Redirect Framework events to event handlers provided in callback class
QSS_API_WRAPPER.connection.starting(function () {
callback.framework_starting();
});
QSS_API_WRAPPER.connection.received(function (data) {
callback.framework_received(data);
});
QSS_API_WRAPPER.connection.connectionSlow(function () {
callback.framework_connectionSlow();
});
QSS_API_WRAPPER.connection.reconnecting(function () {
callback.framework_reconnecting();
});
QSS_API_WRAPPER.connection.reconnected(function () {
callback.framework_reconnected();
});
QSS_API_WRAPPER.connection.stateChanged(function (change) {
callback.framework_stateChanged(change);
});
QSS_API_WRAPPER.connection.disconnected(function () {
callback.framework_disconnected();
});
try {
await new Promise((resolve, reject) => {
QSS_API_WRAPPER.connection.start()
.done(() => {
console.log("Connected to ASP.NET Framework SignalR!");
QSS_API_WRAPPER.deviceHubProxy.invoke('JoinGroup', QSS_GROUP_NAME)
.done(function () {
console.log('Joined group: ' + QSS_GROUP_NAME);
})
.fail(function (error) {
console.error('Invocation of JoinGroup failed. Error:', error);
});
resolve();
})
.fail((err) => {
reject(err);
});
});
QSS_API_WRAPPER.type = 'framework';
} catch (frameworkErr) {
console.warn("Framework connection failed. Trying ASP.NET Core...", frameworkErr);
//
// ASP.NET Core
//
QSS_API_WRAPPER.connection = new signalR.HubConnectionBuilder()
.withUrl(QUERY_STRING['qssUrl'])
.withAutomaticReconnect() // Required to perform automatic reconnects
.build();
// Redirect Core events to event handlers provided in callback class
QSS_API_WRAPPER.connection.onreconnecting(function (error) {
console.log('onreconnecting');
callback.core_onreconnecting(error);
});
QSS_API_WRAPPER.connection.onreconnected(function (connectionId) {
console.log('onreconnected');
callback.core_onreconnected(connectionId);
});
QSS_API_WRAPPER.connection.onclose(function (error) {
console.log('onclose');
callback.core_onclose(error);
});
try {
await QSS_API_WRAPPER.connection.start();
console.log("Connected to ASP.NET Core SignalR!");
QSS_API_WRAPPER.type = 'core';
} catch (coreErr) {
console.error("Both SignalR connection attempts failed.", coreErr);
QSS_API_WRAPPER.type = null;
}
}
}