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util/eventbus: add a debug HTTP handler for the bus

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Updates #15160

Signed-off-by: David Anderson <dave@tailscale.com>
This commit is contained in:
David Anderson
2025-03-07 08:18:33 -08:00
committed by Dave Anderson
parent 640b2fa3ae
commit d83024a63f
10 changed files with 541 additions and 3 deletions
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97
util/eventbus/assets/main.html Normal file
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<!DOCTYPE html>
<html>
<head>
<script src="bus/htmx.min.js"></script>
<script src="bus/htmx-websocket.min.js"></script>
<link rel="stylesheet" href="bus/style.css">
</head>
<body hx-ext="ws">
<h1>Event bus</h1>
<section>
<h2>General</h2>
{{with $.PublishQueue}}
{{len .}} pending
{{end}}
<button hx-post="bus/monitor" hx-swap="outerHTML">Monitor all events</button>
</section>
<section>
<h2>Clients</h2>
<table>
<thead>
<tr>
<th>Name</th>
<th>Publishing</th>
<th>Subscribing</th>
<th>Pending</th>
</tr>
</thead>
{{range .Clients}}
<tr id="{{.Name}}">
<td>{{.Name}}</td>
<td class="list">
<ul>
{{range .Publish}}
<li><a href="#{{.}}">{{.}}</a></li>
{{end}}
</ul>
</td>
<td class="list">
<ul>
{{range .Subscribe}}
<li><a href="#{{.}}">{{.}}</a></li>
{{end}}
</ul>
</td>
<td>
{{len ($.SubscribeQueue .Client)}}
</td>
</tr>
{{end}}
</table>
</section>
<section>
<h2>Types</h2>
{{range .Types}}
<section id="{{.}}">
<h3>{{.Name}}</h3>
<h4>Definition</h4>
<code>{{prettyPrintStruct .}}</code>
<h4>Published by:</h4>
{{if len (.Publish)}}
<ul>
{{range .Publish}}
<li><a href="#{{.Name}}">{{.Name}}</a></li>
{{end}}
</ul>
{{else}}
<ul>
<li>No publishers.</li>
</ul>
{{end}}
<h4>Received by:</h4>
{{if len (.Subscribe)}}
<ul>
{{range .Subscribe}}
<li><a href="#{{.Name}}">{{.Name}}</a></li>
{{end}}
</ul>
{{else}}
<ul>
<li>No subscribers.</li>
</ul>
{{end}}
</section>
{{end}}
</section>
</body>
</html>