Polished up and ready to distribute, maybe
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README.md
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README.md
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@ -1,6 +1,52 @@
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# WebStat
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# Homelab Portal
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This is a simple service to provide `/proc/stat` on demand.
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Some JavaScript parses it and graphs it.
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This repository provide some simple scaffolding to build a landing page for your homelab.
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You can link to all your stuff,
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including pretty icons,
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and your apps will show up under the same top URL,
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like they all work together somehow.
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Essentially, this is a browser version of something like top or btop.
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There are lots of other things like this around.
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Probably the shiniest is called "Heimdall".
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I made this one because I didn't want to run yet another database
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or a PHP server
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when I am perfectly happy editing a JSON file
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and having my browser do all the work.
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# portal.json
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You define all your services in `/web/portal.json`.
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It works like this:
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```json
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[
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{
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"name": "My Thing",
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"href": "https://myhost.example.org/path/to/my/thing/",
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"icon": "https://myhost.example.org/path/to/my/thing/icons.png"
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},
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{
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"name": "Another thing",
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"href": "https://example.net/",
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"target": "_blank"
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},
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{
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"name": "Stat",
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"href": "/stat.html",
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"app": "stat"
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}
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]
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```
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Some notes:
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* `"target": "_blank"` will cause clicks to open in a new tab
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* `"app": "stat"` makes the icon be the built-in CPU stats pie chart
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# Other uses for this
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Since the portal stuff is all static files,
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you could just not use any of that,
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and instead use this as a service to provide CPU stats.
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Just open `/stats.html` instead of `/`.
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Or write your own ECMAScript code that imports `stat.mjs`.
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@ -5,8 +5,8 @@
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<link rel="icon" href="deergrove.png">
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<link rel="stylesheet" href="index.css">
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<script src="index.mjs" type="module"></script>
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<link rel="stylesheet" href="portal.css">
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<script src="portal.mjs" type="module"></script>
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</head>
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<body>
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<nav>
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@ -1,66 +1,18 @@
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[
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{
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"title": "Movies",
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"href": "https://deergrove.woozle.org/radarr/",
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"icon": "/radarr/Content/Images/logo.svg"
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"title": "Woozle",
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"href": "https://woozle.org/"
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},
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{
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"title": "Episodes",
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"href": "https://deergrove.woozle.org/sonarr/",
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"icon": "/sonarr/Content/Images/logo.svg"
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},
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"title": "Forgejo",
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"href": "https://forgejo.org/",
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"target": "_blank",
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"icon": "https://forgejo.org/favicon.svg"
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}
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{
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"title": "Music",
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"href": "https://deergrove.woozle.org/lidarr/",
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"icon": "/lidarr/Content/Images/logo.svg"
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},
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{
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"title": "Books",
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"href": "https://deergrove.woozle.org/readarr/",
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"icon": "/readarr/Content/Images/logo.svg"
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},
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{
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"title": "Media Sucker",
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"href": "https://deergrove.woozle.org/sucker/",
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"icon": "/sucker/cd-dvd.svg"
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},
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{
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"title": "Searcher",
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"href": "https://deergrove.woozle.org/prowlarr/",
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"icon": "/prowlarr/Content/Images/logo.png"
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},
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{
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"title": "Usenet",
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"href": "https://deergrove.woozle.org/nzbget/",
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"icon": "/nzbget/img/favicon-256x256.png"
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},
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{
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"title": "BitTorrent",
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"href": "https://deergrove.woozle.org/transmission/web/",
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"icon": "/transmission/web/images/webclip-icon.png"
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},
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{
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"title": "3D Printer",
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"href": "https://deergrove.woozle.org/octoprint/",
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"icon": "/octoprint/static/img/logo.png"
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},
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{
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"title": "Git",
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"href": "https://git.woozle.org/",
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"icon": "https://git.woozle.org/assets/img/logo.svg",
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"target": "_blank"
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},
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{
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"title": "Storage",
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"href": "https://drive.woozle.org/",
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"icon": "https://drive.woozle.org/storage/public/icons/cloud-folder.png",
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"target": "_blank"
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},
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{
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"title": "Genealogy",
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"href": "https://ancestry.woozle.org/",
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"icon": "https://ancestry.woozle.org/images/arbre_start.png",
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"target": "_blank"
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"title": "Jellyfin",
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"href": "https://jellyfin.org/",
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"icon": "https://jellyfin.org/images/icon-transparent.svg"
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},
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{
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"title": "Host Stats",
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import * as WebStat from "./stat/webstat.mjs"
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import * as Stat from "./stat.mjs"
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const Millisecond = 1
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const Second = 1000 * Millisecond
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@ -6,15 +6,21 @@ const Minute = 60 * Second
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class StatApp {
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constructor(parent) {
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this.stat = new WebStat.Stat()
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this.chart = new WebStat.PieChart(parent, this.stat)
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this.parent= parent
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this.stat = new Stat.Stat()
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this.chart = new Stat.PieChart(parent, this.stat)
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setInterval(()=>this.update(), 2 * Second)
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setTimeout(()=>this.update(), 500 * Millisecond)
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this.update()
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}
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async update() {
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this.stat.update()
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// Use non-standard checkVisibility method to avoid a pointless update
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if (this.parent.checkVisibility && !this.parent.checkVisibility()) {
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return
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}
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await this.stat.update()
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this.chart.update()
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}
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}
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<meta charset="utf-8">
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<script src="stat.mjs" type="module"></script>
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<style>
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#pie {
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html, body {
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margin: 0;
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}
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#pie canvas {
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max-width: 50px;
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position: absolute;
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}
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#area canvas {
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width: 100vw;
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height: 99vh;
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}
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</style>
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</head>
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<body>
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<div id="pie"></div>
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<div id="chart"></div>
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<body data-autostat>
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<div id="pie" class="pie chart"></div>
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<div id="area" class="area chart"></div>
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</body>
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</html>
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const τ = Math.PI * 2
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const Millisecond = 1
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const Second = 1000 * Millisecond
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/**
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* Stat keeps track of CPU usage since the last update
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*/
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class Stat {
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constructor() {
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this.Stat = {}
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this.LastStat = {}
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}
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async update() {
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let resp = await fetch("proc/stat")
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let stext = await resp.text()
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let lines = stext.split("\n")
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this.Date = new Date(resp.headers.get("Date"))
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this.LastStat = this.Stat
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this.Stat = {}
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for (let line of lines) {
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let parts = line.split(/\s+/)
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let key = parts.shift()
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let vals = parts.map(Number)
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this.Stat[key] = vals
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}
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}
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/**
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* Compute CPU use since last update
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*
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* @param {Number} n CPU to look at. Leave blank for a summary of all CPUs.
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* @returns Object with CPU usages (0.0-1.0)
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*/
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cpu(n="") {
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let key = `cpu${n}`
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let vals = this.Stat[key]
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let prev = this.LastStat[key]
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if (!vals || !prev) {
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return {}
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}
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let total = vals.reduce((a,b)=>a+b) - prev.reduce((a,b)=>a+b)
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return {
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user: (vals[0] - prev[0]) / total,
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nice: (vals[1] - prev[1]) / total,
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sys: (vals[2] - prev[2]) / total,
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idle: (vals[3] - prev[3]) / total,
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wait: (vals[4] - prev[4]) / total,
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irq: (vals[5] - prev[5]) / total,
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softirq: (vals[6] - prev[6]) / total,
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steal: (vals[7] - prev[7]) / total,
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guest: (vals[8] - prev[8]) / total,
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guestNice: (vals[9] - prev[9]) / total,
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}
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}
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}
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/**
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* Chart defines common functionality for any chart
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*/
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class Chart {
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constructor(element, stat) {
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this.stat = stat
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this.canvas = element.appendChild(document.createElement("canvas"))
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this.ctx = this.canvas.getContext("2d")
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this.colors = ["SkyBlue", "SeaGreen", "Gold", "Tomato"]
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this.labels = ["u", "n", "s", "w"]
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}
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cpu() {
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let cpu = this.stat.cpu()
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return [cpu.user, cpu.nice, cpu.sys, cpu.wait]
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}
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clear() {
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this.ctx.clearRect(0, 0, this.canvas.width, this.canvas.height)
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}
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}
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/**
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* PieChart makes a little CPU usage pie chart, with idle time transparent.
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*/
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class PieChart extends Chart{
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/**
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*
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* @param {Element} element
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* @param {Stat} stat
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*/
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constructor(element, stat) {
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super(element, stat)
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this.r = 250
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this.θ = 0
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this.canvas.width = this.r*2
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this.canvas.height = this.r*2
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}
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async update() {
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let values = this.cpu()
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let θ = -τ/4
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this.clear()
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this.ctx.save()
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this.ctx.translate(this.r, this.r)
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this.ctx.font = `bold ${this.r/3}px sans-serif`
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for (let i in values) {
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let angle = values[i] * τ
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this.ctx.fillStyle = this.colors[i]
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this.ctx.beginPath()
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this.ctx.arc(0, 0, this.r, θ, θ + angle, false)
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this.ctx.lineTo(0, 0)
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this.ctx.fill()
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if (angle > τ/12) {
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let mid = θ + angle/2
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this.ctx.save()
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this.ctx.rotate(mid)
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this.ctx.translate(this.r*0.7, 0)
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this.ctx.rotate(-mid)
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this.ctx.fillStyle = "black"
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this.ctx.textBaseline = "middle"
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this.ctx.textAlign = "center"
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this.ctx.fillText(this.labels[i], 0, 0)
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this.ctx.restore()
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}
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θ += angle
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}
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this.ctx.restore()
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}
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}
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/**
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* Area chart makes a packed, stacked bar chart of historical CPU usage.
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*/
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class AreaChart extends Chart {
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/**
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*
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* @param {Element} element
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* @param {Stat} stat
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* @param {Number} historyLen How many historical values to keep
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*/
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constructor(element, stat, historyLen=300) {
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super(element, stat)
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this.historyLen = historyLen
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this.history = Array(this.historyLen) // Make it fill in from the right
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this.canvas.width = 600
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this.canvas.height = 500
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// Cartesian coordinates
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this.ctx.translate(0, this.canvas.height)
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this.ctx.scale(1, -1)
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}
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async update() {
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let xStep = this.canvas.width / this.historyLen
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let yStep = this.canvas.height / 1
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this.history.push(this.cpu())
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while (this.history.length > this.historyLen) {
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this.history.shift()
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}
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this.clear()
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for (let y = 0; y < this.canvas.height; y += 0.25*this.canvas.height) {
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this.ctx.strokeStyle = "silver"
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this.ctx.beginPath()
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this.ctx.moveTo(0, y)
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this.ctx.lineTo(this.canvas.width, y)
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this.ctx.stroke()
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}
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for (let i in this.history) {
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let h = this.history[i]
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if (!h) {
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continue
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}
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let x = i * xStep
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let y = 0
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for (let j in h) {
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let val = h[j]
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this.ctx.beginPath()
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this.ctx.fillStyle = this.colors[j]
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this.ctx.rect(x, y, xStep, yStep * val)
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this.ctx.fill()
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y += yStep * val
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}
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}
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}
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}
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/**
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* AutoStat automatically sets up any pie and area charts in the document.
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*
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* You can enable this automatically by providing <body dataset-autostat>
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*/
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class AutoStat {
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constructor() {
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this.stat = new Stat()
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this.charts = []
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for (let e of document.querySelectorAll(".pie.chart")) {
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this.charts.push(new PieChart(e, this.stat))
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}
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for (let e of document.querySelectorAll(".area.chart")) {
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this.charts.push(new AreaChart(e, this.stat))
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}
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setInterval(()=>this.update(), 2 * Second)
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this.update()
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setTimeout(()=>this.update(), 500 * Millisecond)
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}
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async update() {
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await this.stat.update()
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for (let c of this.charts) {
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c.update()
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}
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}
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}
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function init() {
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if (document.body.dataset.autostat != undefined) {
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new AutoStat()
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}
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}
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if (document.readyState === "loading") {
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document.addEventListener("DOMContentLoaded", init)
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} else {
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init()
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}
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export {
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Stat,
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PieChart,
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AreaChart,
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AutoStat,
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}
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@ -1,32 +0,0 @@
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import * as WebStat from "./webstat.mjs"
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const Millisecond = 1
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||||
const Second = 1000 * Millisecond
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const Minute = 60 * Second
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||||
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||||
class App {
|
||||
constructor() {
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||||
this.stat = new WebStat.Stat()
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this.areaChart = new WebStat.AreaChart(document.querySelector("#chart"), this.stat)
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||||
this.pieChart = new WebStat.PieChart(document.querySelector("#pie"), this.stat)
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||||
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||||
setInterval(()=>this.update(), 2 * Second)
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||||
}
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||||
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||||
async update() {
|
||||
this.stat.update()
|
||||
this.areaChart.update()
|
||||
this.pieChart.update()
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
function init() {
|
||||
new App()
|
||||
}
|
||||
|
||||
if (document.readyState === "loading") {
|
||||
document.addEventListener("DOMContentLoaded", init)
|
||||
} else {
|
||||
init()
|
||||
}
|
||||
|
|
@ -1,168 +0,0 @@
|
|||
const τ = Math.PI * 2
|
||||
|
||||
function qpush(arr, val, len) {
|
||||
arr.push(val)
|
||||
if (arr.length > len) {
|
||||
arr.shift()
|
||||
}
|
||||
}
|
||||
|
||||
class Stat {
|
||||
constructor() {
|
||||
this.Stat = {}
|
||||
this.LastStat = {}
|
||||
}
|
||||
|
||||
async update() {
|
||||
let resp = await fetch("proc/stat")
|
||||
let stext = await resp.text()
|
||||
let lines = stext.split("\n")
|
||||
this.Date = new Date(resp.headers.get("Date"))
|
||||
this.LastStat = this.Stat
|
||||
this.Stat = {}
|
||||
for (let line of lines) {
|
||||
let parts = line.split(/\s+/)
|
||||
let key = parts.shift()
|
||||
let vals = parts.map(Number)
|
||||
this.Stat[key] = vals
|
||||
}
|
||||
}
|
||||
|
||||
cpu(n="") {
|
||||
let key = `cpu${n}`
|
||||
let vals = this.Stat[key]
|
||||
let prev = this.LastStat[key]
|
||||
if (!vals || !prev) {
|
||||
return {}
|
||||
}
|
||||
let total = vals.reduce((a,b)=>a+b) - prev.reduce((a,b)=>a+b)
|
||||
return {
|
||||
user: (vals[0] - prev[0]) / total,
|
||||
nice: (vals[1] - prev[1]) / total,
|
||||
sys: (vals[2] - prev[2]) / total,
|
||||
idle: (vals[3] - prev[3]) / total,
|
||||
wait: (vals[4] - prev[4]) / total,
|
||||
irq: (vals[5] - prev[5]) / total,
|
||||
softirq: (vals[6] - prev[6]) / total,
|
||||
steal: (vals[7] - prev[7]) / total,
|
||||
guest: (vals[8] - prev[8]) / total,
|
||||
guestNice: (vals[9] - prev[9]) / total,
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
class AreaChart {
|
||||
constructor(element, stat, width=60) {
|
||||
this.stat = stat
|
||||
this.width = width
|
||||
this.canvas = element.appendChild(document.createElement("canvas"))
|
||||
this.data ={
|
||||
labels: [],
|
||||
datasets: []
|
||||
}
|
||||
this.datasets = {}
|
||||
for (let label of ["user", "nice", "sys", "idle", "wait"]) {
|
||||
let d = []
|
||||
this.data.datasets.push({
|
||||
label: label,
|
||||
data: d,
|
||||
})
|
||||
this.datasets[label] = d
|
||||
}
|
||||
this.chart = new Chart(
|
||||
this.canvas,
|
||||
{
|
||||
type: "line",
|
||||
data: this.data,
|
||||
options: {
|
||||
responsive: true,
|
||||
pointStyle: false,
|
||||
scales: {
|
||||
x: {
|
||||
title: { display: false },
|
||||
ticks: { display: false },
|
||||
grid: { display: false },
|
||||
},
|
||||
y: {
|
||||
stacked: true,
|
||||
ticks: { display: false },
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
)
|
||||
}
|
||||
|
||||
async update() {
|
||||
let cpu = this.stat.cpu()
|
||||
qpush(this.data.labels, this.stat.Date, this.width)
|
||||
qpush(this.datasets.user, cpu.user, this.width)
|
||||
qpush(this.datasets.nice, cpu.nice, this.width)
|
||||
qpush(this.datasets.sys, cpu.sys, this.width)
|
||||
qpush(this.datasets.idle, cpu.idle, this.width)
|
||||
qpush(this.datasets.wait, cpu.wait, this.width)
|
||||
this.chart.update()
|
||||
}
|
||||
}
|
||||
|
||||
class PieChart {
|
||||
constructor(element, stat) {
|
||||
this.stat = stat
|
||||
this.canvas = element.appendChild(document.createElement("canvas"))
|
||||
this.ctx = this.canvas.getContext("2d")
|
||||
this.r = 250
|
||||
this.θ = 0
|
||||
this.canvas.width = this.r*2
|
||||
this.canvas.height = this.r*2
|
||||
}
|
||||
|
||||
arc(angle, color) {
|
||||
this.ctx.fillStyle = color
|
||||
this.ctx.beginPath()
|
||||
this.ctx.arc(this.r, this,r, this,r, this.θ, this.θ + angle)
|
||||
this.ctx.fill()
|
||||
}
|
||||
|
||||
async update() {
|
||||
let cpu = this.stat.cpu()
|
||||
this.ctx.clearRect(0, 0, this.canvas.width, this.canvas.height)
|
||||
|
||||
let colors = ["SkyBlue", "SeaGreen", "Gold", "Tomato"]
|
||||
let values = [cpu.user, cpu.nice, cpu.sys, cpu.wait]
|
||||
let labels = ["u", "n", "s", "w"]
|
||||
|
||||
let θ = -τ/4
|
||||
this.ctx.save()
|
||||
this.ctx.translate(this.r, this.r)
|
||||
this.ctx.font = `bold ${this.r/3}px sans-serif`
|
||||
for (let i = 0; i < colors.length; i++) {
|
||||
let angle = values[i] * τ
|
||||
|
||||
this.ctx.fillStyle = colors[i]
|
||||
this.ctx.beginPath()
|
||||
this.ctx.arc(0, 0, this.r, θ, θ + angle, false)
|
||||
this.ctx.lineTo(0, 0)
|
||||
this.ctx.fill()
|
||||
|
||||
if (angle > τ/12) {
|
||||
let mid = θ + angle/2
|
||||
this.ctx.save()
|
||||
this.ctx.rotate(mid)
|
||||
this.ctx.translate(this.r*0.7, 0)
|
||||
this.ctx.rotate(-mid)
|
||||
this.ctx.fillStyle = "black"
|
||||
this.ctx.textBaseline = "middle"
|
||||
this.ctx.textAlign = "center"
|
||||
this.ctx.fillText(labels[i], 0, 0)
|
||||
this.ctx.restore()
|
||||
}
|
||||
θ += angle
|
||||
}
|
||||
this.ctx.restore()
|
||||
}
|
||||
}
|
||||
|
||||
export {
|
||||
Stat,
|
||||
PieChart,
|
||||
}
|
||||
Loading…
Reference in New Issue