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Merge branch 'main' of github.com:binwiederhier/ntfy
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2 changed files with 60 additions and 3 deletions
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@ -190,9 +190,10 @@ format. Keepalive messages are sent as empty lines.
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## WebSockets
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## WebSockets
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You may also subscribe to topics via [WebSockets](https://en.wikipedia.org/wiki/WebSocket), which is also widely
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You may also subscribe to topics via [WebSockets](https://en.wikipedia.org/wiki/WebSocket), which is also widely
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supported in many languages. Most notably, WebSockets are natively supported in JavaScript. On the command line,
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supported in many languages. Most notably, WebSockets are natively supported in JavaScript. You may also want to
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I recommend [websocat](https://github.com/vi/websocat), a fantastic tool similar to `socat` or `curl`, but specifically
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check out the [full example on GitHub](https://github.com/binwiederhier/ntfy/tree/main/examples/web-example-websocket).
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for WebSockets.
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On the command line, I recommend [websocat](https://github.com/vi/websocat), a fantastic tool similar to `socat`
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or `curl`, but specifically for WebSockets.
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The WebSockets endpoint is available at `<topic>/ws` and returns messages as JSON objects similar to the
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The WebSockets endpoint is available at `<topic>/ws` and returns messages as JSON objects similar to the
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[JSON stream endpoint](#subscribe-as-json-stream).
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[JSON stream endpoint](#subscribe-as-json-stream).
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56
examples/web-example-websocket/example-ws.html
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examples/web-example-websocket/example-ws.html
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<title>ntfy.sh: WebSocket Example</title>
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<meta name="robots" content="noindex, nofollow" />
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<style>
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body { font-size: 1.2em; line-height: 130%; }
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#events { font-family: monospace; }
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</style>
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</head>
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<body>
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<h1>ntfy.sh: WebSocket Example</h1>
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<p>
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This is an example showing how to use <a href="https://ntfy.sh">ntfy.sh</a> with
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<a href="https://developer.mozilla.org/en-US/docs/Web/API/WebSocket">WebSocket</a>.<br/>
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This example doesn't need a server. You can just save the HTML page and run it from anywhere.
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</p>
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<button id="publishButton">Send test notification</button>
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<p><b>Log:</b></p>
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<div id="events"></div>
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<script type="text/javascript">
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const publishURL = `https://ntfy.sh/example`;
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const subscribeURL = `wss://ntfy.sh/example/ws`;
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const events = document.getElementById('events');
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const websocket = new WebSocket(subscribeURL);
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// Publish button
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document.getElementById("publishButton").onclick = () => {
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fetch(publishURL, {
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method: 'POST', // works with PUT as well, though that sends an OPTIONS request too!
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body: `It is ${new Date().toString()}. This is a test.`
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})
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};
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// Incoming events
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websocket.onopen = () => {
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let event = document.createElement('div');
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event.innerHTML = `WebSocket connected to ${subscribeURL}`;
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events.appendChild(event);
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};
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websocket.onerror = (e) => {
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let event = document.createElement('div');
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event.innerHTML = `WebSocket error: Failed to connect to ${subscribeURL}`;
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events.appendChild(event);
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};
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websocket.onmessage = (e) => {
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let event = document.createElement('div');
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event.innerHTML = e.data;
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events.appendChild(event);
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};
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</script>
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</body>
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</html>
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