pyproc/examples/serverDev.html at main · eddmpython/pyproc · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Server Dev - pyproc</title>
  <link rel="icon" href="../assets/logo.svg">
  <meta name="theme-color" content="#0a0f1c">
  <link rel="stylesheet" href="demo.css">
  <script type="module" src="siteChrome.js"></script>
</head>
<body>
  <div class="wrap">
    <header class="site">
      <a class="logo" href="../"><img class="logoMark" src="../assets/logo.svg" width="22" height="22" alt=""> <span><span class="py">py</span>proc</span></a>
      <nav>
        <a href="agentSandbox.html">Agent</a>
        <a href="machine.html">Machine</a>
        <a href="serverDev.html" class="on">Server</a>
        <a href="speedLab.html">Speed</a>
        <a href="terminal.html">Terminal</a>
        <a href="processOs.html">Process OS</a>
        <a href="basic.html">Basics</a>
      </nav>
      <sns-links></sns-links>
    </header>

    <h1>A Python web server, inside the browser</h1>
    <p class="lead">FastAPI, SQLite, an editable <code>app.py</code>, and a real URL all run inside this tab.
    The preview below is served by Python through a Service Worker virtual origin, with zero TCP sockets.</p>

    <div class="panel">
      <div class="status" id="st">Booting CPython and building the project...</div>
      <div class="row" style="margin:.6rem 0 .2rem">
        <span class="badge ok">FastAPI in the kernel</span>
        <span class="badge info">SQLite on /home/web</span>
        <span class="badge">fetch("./pyproc/...") is Python</span>
      </div>
      <div class="kv" id="stats" style="display:none">
        <div class="k">boot</div><div id="bootMs"></div>
        <div class="k">install</div><div id="installMs"></div>
        <div class="k">route</div><div id="routeMs"></div>
        <div class="k">dev loop</div><div id="devMs"></div>
      </div>
    </div>

    <div class="panel">
      <p class="dim" style="margin:0 0 .5rem">This is the live project file in <code>/home/web/server/app.py</code>. Edit it by pressing the button: the running app reloads without leaving the browser.</p>
      <div class="row">
        <button id="add">POST todo</button>
        <button id="edit" class="ghost">Edit app.py -> v2</button>
        <button id="reload" class="ghost">Reload preview</button>
      </div>
      <div class="term" id="out"></div>
    </div>

    <div class="panel">
      <p class="dim" style="margin:0 0 .5rem">Preview iframe. Its URL is served by the Python ASGI app, not by the static file server.</p>
      <iframe id="preview" title="pyproc server preview" style="width:100%;height:14rem;border:1px solid var(--border);border-radius:10px;background:white"></iframe>
    </div>

    <footer class="site">Chromium/Edge. Source: <a href="https://github.com/eddmpython/pyproc">github.com/eddmpython/pyproc</a> · <a href="https://www.npmjs.com/package/pyproc">npm install pyproc</a></footer>
  </div>

  <script type="module">
    import { boot } from "../index.js";

    const st = document.getElementById("st"), out = document.getElementById("out"), preview = document.getElementById("preview");
    const el = (id) => document.getElementById(id);
    const params = new URLSearchParams(location.search);
    const gateMode = params.has("gate");
    const INDEX = params.get("indexURL") ? new URL(params.get("indexURL"), location.href).href : undefined;
    const ASGI_PREFIX = new URL("pyproc/", location.href).pathname;
    const API = "./pyproc";
    const log = (m) => { out.textContent += m + "\n"; out.scrollTop = out.scrollHeight; };
    const gateReport = (ok) => {
      if (!gateMode) return;
      fetch("/gateReport", {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({ ok: !!ok, checks: [{ name: document.title, pass: !!ok, info: (st.textContent + " | " + out.textContent).slice(-220) }] }),
      }).catch(() => {});
    };

    const scriptClose = "</scr" + "ipt>";
    function appSource(version) {
      const page = [
        "<!doctype html><html><body data-version='" + version + "' style='font:15px system-ui;margin:1.2rem;color:#111'>",
        "<h1>pyproc FastAPI " + version + "</h1>",
        "<p>This page came from Python running in the browser tab.</p>",
        "<button id='add'>add from served page</button>",
        "<ul id='list'></ul>",
        "<script>",
        "async function refresh(){",
        "  const rows = await (await fetch('./api/todos')).json();",
        "  document.getElementById('list').innerHTML = rows.map((x) => '<li>' + x.text + '</li>').join('');",
        "  parent.postMessage({ pyprocServerDev: { version: document.body.dataset.version, count: rows.length, items: rows.map((x) => x.text) } }, location.origin);",
        "}",
        "document.getElementById('add').onclick = async () => { await fetch('./api/todos', { method: 'POST', body: JSON.stringify({ text: 'from served page' }) }); refresh(); };",
        "refresh();",
        scriptClose,
        "</body></html>",
      ].join("");
      return [
        "from fastapi import FastAPI, Request",
        "from fastapi.responses import HTMLResponse",
        "import os, sqlite3",
        "",
        `version = ${JSON.stringify(version)}`,
        `page = ${JSON.stringify(page)}`,
        "dbPath = '/home/web/server/data.db'",
        "app = FastAPI()",
        "",
        "def getConn():",
        "    os.makedirs('/home/web/server', exist_ok=True)",
        "    conn = sqlite3.connect(dbPath)",
        "    conn.execute('CREATE TABLE IF NOT EXISTS todos (id INTEGER PRIMARY KEY, text TEXT)')",
        "    return conn",
        "",
        "def listTodos():",
        "    conn = getConn()",
        "    rows = [{'id': r[0], 'text': r[1]} for r in conn.execute('SELECT id, text FROM todos ORDER BY id')]",
        "    conn.close()",
        "    return rows",
        "",
        "@app.get('/', response_class=HTMLResponse)",
        "async def home():",
        "    return page",
        "",
        "@app.get('/api/version')",
        "async def getVersion():",
        "    return {'version': version}",
        "",
        "@app.get('/api/todos')",
        "async def getTodos():",
        "    return listTodos()",
        "",
        "@app.post('/api/todos')",
        "async def postTodo(req: Request):",
        "    body = await req.json()",
        "    conn = getConn()",
        "    conn.execute('INSERT INTO todos (text) VALUES (?)', (body['text'],))",
        "    conn.commit()",
        "    conn.close()",
        "    return {'ok': True, 'count': len(listTodos())}",
      ].join("\n");
    }

    async function clearDirectory(dir) {
      for await (const [name, handle] of dir.entries()) {
        await dir.removeEntry(name, { recursive: handle.kind === "directory" });
      }
    }

    let machine, asgi, home;

    async function writeApp(version) {
      machine.runtime.setGlobal("appSrc", appSource(version));
      machine.run("import os\nos.makedirs('/home/web/server', exist_ok=True)\nopen('/home/web/server/app.py', 'w').write(appSrc)");
      await home.sync();
    }

    async function importApp(reload = false) {
      machine.run(reload
        ? "import importlib, app as appModule\nappModule = importlib.reload(appModule)\napp = appModule.app"
        : "import sys\nsys.path.insert(0, '/home/web/server')\nimport app as appModule\napp = appModule.app");
    }

    // 가상 오리진의 페이지측 배선. serverDevSw.js(번들 pyprocSw.js 자산의 ?asgi= 계약)가
    // 가로챈 "/pyproc/..." fetch를 pyprocAsgi 메시지로 위임하면, 이 문서가 공개 asgi.serve
    // 계약으로 응답한다. hello(pyprocKernelHello)로 자신을 커널 클라이언트로 등록해야
    // 서빙된 iframe이 낸 fetch도 이 커널로 라우팅된다(SW 재시작 = 등록 증발이라 재전송).
    function bindKernelOrigin() {
      navigator.serviceWorker.addEventListener("message", async (e) => {
        const req = e.data && e.data.pyprocAsgi;
        if (!req) return;
        try {
          const r = await asgi.serve(req.method, req.path, req.body, req.query, req.headers);
          e.ports[0].postMessage({ status: r.status, headers: r.headers, body: r.bodyBytes });
        } catch (err) {
          e.ports[0].postMessage({ error: String(err).slice(-300) });
        }
      });
      const hello = () => {
        if (navigator.serviceWorker.controller) navigator.serviceWorker.controller.postMessage({ pyprocKernelHello: true });
      };
      hello();
      navigator.serviceWorker.addEventListener("controllerchange", hello);
    }

    async function registerVirtualOrigin() {
      const reg = await navigator.serviceWorker.register(`serverDevSw.js?asgi=${encodeURIComponent(ASGI_PREFIX)}&asgiTimeout=30000`);
      await navigator.serviceWorker.ready;
      if (!navigator.serviceWorker.controller) {
        await new Promise((res) => navigator.serviceWorker.addEventListener("controllerchange", res, { once: true }));
      }
      bindKernelOrigin();
      return reg;
    }

    function waitServedFrame(timeoutMs = 15000) {
      return new Promise((resolve) => {
        const timer = setTimeout(() => resolve(null), timeoutMs);
        const onMsg = (e) => {
          if (e.origin !== location.origin || !e.data?.pyprocServerDev) return;
          clearTimeout(timer);
          removeEventListener("message", onMsg);
          resolve(e.data.pyprocServerDev);
        };
        addEventListener("message", onMsg);
      });
    }

    async function reloadPreview() {
      const seen = waitServedFrame();
      preview.src = `${API}/?t=${Date.now()}`;
      return seen;
    }

    async function addTodo(text) {
      const r = await fetch(`${API}/api/todos`, { method: "POST", body: JSON.stringify({ text }) });
      return r.json();
    }

    async function start() {
      const root = await navigator.storage.getDirectory();
      const homeDir = await root.getDirectoryHandle(gateMode ? "pyprocServerDevGateHome" : "pyprocServerDevHome", { create: true });
      if (gateMode) await clearDirectory(homeDir);
      let t = performance.now();
      machine = await boot({ indexURL: INDEX });
      home = await machine.runtime.mountHome(homeDir);
      const bootMs = Math.round(performance.now() - t);
      el("bootMs").textContent = `${bootMs}ms`;
      log(`boot: ${bootMs}ms`);

      t = performance.now();
      await machine.runtime.install("fastapi");
      const installMs = Math.round(performance.now() - t);
      el("installMs").textContent = `${installMs}ms`;
      log(`fastapi install: ${installMs}ms`);

      await writeApp("v1");
      await importApp(false);
      asgi = machine.runtime.enableAsgiServer();
      await asgi.install();
      await registerVirtualOrigin();

      t = performance.now();
      const version = await (await fetch(`${API}/api/version`)).json();
      const routeMs = Math.round(performance.now() - t);
      el("routeMs").textContent = `${routeMs}ms`;
      document.getElementById("stats").style.display = "grid";
      st.textContent = `Server live at ${API}/ (version ${version.version}).`;
      log(`GET ${API}/api/version -> ${JSON.stringify(version)} in ${routeMs}ms`);
      return version.version === "v1";
    }

    async function editToV2() {
      const t = performance.now();
      await writeApp("v2");
      await importApp(true);
      const version = await (await fetch(`${API}/api/version`)).json();
      const devMs = Math.round(performance.now() - t);
      el("devMs").textContent = `${devMs}ms`;
      log(`edited app.py -> ${version.version} in ${devMs}ms`);
      return version.version === "v2";
    }

    try {
      const okStart = await start();
      document.getElementById("add").onclick = async () => {
        const r = await addTodo(`todo ${Date.now()}`);
        log(`POST todo -> ${JSON.stringify(r)}`);
        await reloadPreview();
      };
      document.getElementById("edit").onclick = async () => {
        await editToV2();
        await reloadPreview();
      };
      document.getElementById("reload").onclick = reloadPreview;

      await addTodo("ship browser server");
      const rows = await (await fetch(`${API}/api/todos`)).json();
      const frame1 = await reloadPreview();
      if (gateMode) {
        const okEdit = await editToV2();
        const frame2 = await reloadPreview();
        const ok = okStart && rows.length >= 1 && frame1?.count >= 1 && okEdit && frame2?.version === "v2";
        gateReport(ok);
      }
    } catch (e) {
      st.textContent = "Failed";
      log("Error: " + String(e).slice(-260));
      gateReport(false);
    }
  </script>
</body>
</html>