all-smi/examples/sse_client.html at main · lablup/all-smi · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>all-smi — Server-Sent Events demo</title>
<!--
  Minimal SSE client for the `/events` endpoint shipped in all-smi 0.21+
  (issue #193). Opens an EventSource against http://localhost:9090/events,
  renders each incoming snapshot as a compact table, and logs lag /
  reconnect transitions to the bottom panel.

  Usage:

      all-smi api --port 9090 &
      xdg-open examples/sse_client.html   # or just open in your browser

  The page is self-contained — no build step, no CDN — so it can also be
  saved next to a mock recording and opened from `file://` for quick
  diagnosis.
-->
<style>
  :root {
    --bg: #0f1115;
    --panel: #1a1f27;
    --text: #d5dfe8;
    --muted: #8796a5;
    --accent: #7cc9ff;
    --ok: #8adf8e;
    --warn: #ffd27a;
    --err: #ff7a7a;
  }
  * { box-sizing: border-box; }
  body {
    margin: 0;
    padding: 16px;
    font-family: "Inter", "Segoe UI", Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
  }
  h1 {
    margin: 0 0 8px 0;
    font-size: 20px;
  }
  .meta {
    color: var(--muted);
    margin-bottom: 16px;
    font-size: 13px;
  }
  .meta .dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--muted);
    margin-right: 6px;
    vertical-align: middle;
  }
  .meta.ok .dot   { background: var(--ok); }
  .meta.warn .dot { background: var(--warn); }
  .meta.err .dot  { background: var(--err); }
  #controls {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    align-items: center;
    margin-bottom: 12px;
  }
  #controls input,
  #controls button {
    padding: 6px 10px;
    font-size: 13px;
    background: var(--panel);
    color: var(--text);
    border: 1px solid #2d3643;
    border-radius: 4px;
  }
  #controls button { cursor: pointer; }
  #controls button.primary { background: var(--accent); color: var(--bg); border-color: var(--accent); }
  table {
    width: 100%;
    border-collapse: collapse;
    background: var(--panel);
    border-radius: 6px;
    overflow: hidden;
    margin-bottom: 16px;
  }
  th, td {
    padding: 8px 12px;
    border-bottom: 1px solid #2d3643;
    text-align: left;
    font-size: 13px;
  }
  th {
    background: #202734;
    font-weight: 600;
    color: var(--accent);
  }
  .num {
    font-variant-numeric: tabular-nums;
    text-align: right;
  }
  #log {
    background: var(--panel);
    border-radius: 6px;
    padding: 8px 12px;
    font-family: "JetBrains Mono", "Menlo", monospace;
    font-size: 12px;
    max-height: 220px;
    overflow-y: auto;
  }
  #log .line.lag   { color: var(--warn); }
  #log .line.err   { color: var(--err); }
  #log .line.open  { color: var(--ok); }
</style>
</head>
<body>

<h1>all-smi — live metrics stream</h1>

<div id="controls">
  <label>
    URL
    <input id="url" type="text" value="http://localhost:9090/events" size="36">
  </label>
  <label>
    include
    <input id="include" type="text" value="gpu,cpu,memory,chassis" size="30">
  </label>
  <button id="connect" class="primary">Connect</button>
  <button id="disconnect">Disconnect</button>
</div>

<div id="status" class="meta"><span class="dot"></span><span id="statusText">Idle.</span></div>

<h2 style="font-size:15px;margin:12px 0 6px 0;">GPUs</h2>
<table id="gpuTable">
  <thead>
    <tr>
      <th>#</th>
      <th>Name</th>
      <th class="num">Util %</th>
      <th class="num">Mem used / total</th>
      <th class="num">Temp °C</th>
      <th class="num">Power W</th>
    </tr>
  </thead>
  <tbody></tbody>
</table>

<h2 style="font-size:15px;margin:12px 0 6px 0;">Log</h2>
<div id="log"></div>

<script>
  const statusEl   = document.getElementById("status");
  const statusText = document.getElementById("statusText");
  const logEl      = document.getElementById("log");
  const gpuBody    = document.querySelector("#gpuTable tbody");
  const urlEl      = document.getElementById("url");
  const includeEl  = document.getElementById("include");
  const connectBtn = document.getElementById("connect");
  const disconnBtn = document.getElementById("disconnect");

  let source = null;

  function setStatus(kind, text) {
    statusEl.className = "meta " + kind;
    statusText.textContent = text;
  }
  function log(kind, msg) {
    const line = document.createElement("div");
    line.className = "line " + kind;
    const ts = new Date().toLocaleTimeString();
    line.textContent = `[${ts}] ${msg}`;
    logEl.appendChild(line);
    logEl.scrollTop = logEl.scrollHeight;
  }
  function fmtBytes(n) {
    if (!Number.isFinite(n)) return "—";
    const units = ["B","KB","MB","GB","TB"];
    let i = 0;
    while (n >= 1024 && i < units.length - 1) { n /= 1024; i++; }
    return `${n.toFixed(1)} ${units[i]}`;
  }

  function addCell(row, text, cls) {
    // Build every cell with textContent so snapshot fields cannot inject
    // HTML into the demo page. Protects operators who point this client
    // at a host whose reader returns crafted GPU names (hostile mock,
    // compromised upstream, or a renamed device via driver tooling).
    const td = document.createElement("td");
    if (cls) td.className = cls;
    td.textContent = text;
    row.appendChild(td);
  }

  function renderGpus(gpus) {
    gpuBody.innerHTML = "";
    if (!Array.isArray(gpus)) return;
    gpus.forEach((g, idx) => {
      const tr = document.createElement("tr");
      const used  = g.used_memory  ?? g.memory?.used  ?? NaN;
      const total = g.total_memory ?? g.memory?.total ?? NaN;
      addCell(tr, String(idx), "num");
      addCell(tr, g.name ?? "—");
      addCell(tr, String(g.utilization ?? "—"), "num");
      addCell(tr, `${fmtBytes(used)} / ${fmtBytes(total)}`, "num");
      addCell(tr, String(g.temperature ?? "—"), "num");
      addCell(tr, String(g.power_consumption ?? "—"), "num");
      gpuBody.appendChild(tr);
    });
  }

  function connect() {
    if (source) source.close();
    const base = urlEl.value.trim();
    const include = includeEl.value.trim();
    const url = include ? `${base}?include=${encodeURIComponent(include)}` : base;
    setStatus("warn", `Connecting to ${url}…`);
    source = new EventSource(url);
    source.onopen = () => {
      setStatus("ok", `Connected to ${url}`);
      log("open", `open: ${url}`);
    };
    source.onerror = (e) => {
      setStatus("err", "Connection error (browser may retry).");
      log("err", `error: readyState=${source.readyState}`);
    };
    source.addEventListener("snapshot", (ev) => {
      try {
        const snap = JSON.parse(ev.data);
        renderGpus(snap.gpus);
        setStatus("ok", `Last frame: ${snap.timestamp} (host=${snap.hostname})`);
      } catch (e) {
        log("err", `parse failure: ${e}`);
      }
    });
    source.addEventListener("lag", (ev) => {
      try {
        const payload = JSON.parse(ev.data);
        log("lag", `lag: dropped ${payload.dropped} frame(s)`);
      } catch {
        log("lag", `lag: ${ev.data}`);
      }
    });
  }

  function disconnect() {
    if (source) {
      source.close();
      source = null;
      setStatus("muted", "Disconnected.");
      log("open", "closed by user");
    }
  }

  connectBtn.addEventListener("click", connect);
  disconnBtn.addEventListener("click", disconnect);
</script>

</body>
</html>