add: stand configs
This commit is contained in:
“Naeel”
@@ -0,0 +1,204 @@
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const http = require("http");
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const { URL } = require("url");
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const { Pool } = require("pg");
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// Конфигурация Postgres, DATABASE_URL имеет приоритет.
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function buildPgConfig() {
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if (process.env.DATABASE_URL) {
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return {
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connectionString: process.env.DATABASE_URL,
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ssl: process.env.PGSSLMODE === "require" ? { rejectUnauthorized: false } : undefined,
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};
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}
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return {
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host: process.env.PGHOST,
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port: Number(process.env.PGPORT || "5432"),
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user: process.env.PGUSER,
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password: process.env.PGPASSWORD,
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database: process.env.PGDATABASE || "postgres",
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ssl: process.env.PGSSLMODE === "require" ? { rejectUnauthorized: false } : undefined,
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};
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}
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// Общий пул подключений.
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const pool = new Pool(buildPgConfig());
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// Таблица для демо создается автоматически.
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async function ensureTable() {
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await pool.query(
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"CREATE TABLE IF NOT EXISTS nubes_test_table (id SERIAL PRIMARY KEY, test_data TEXT, created_at TIMESTAMP DEFAULT NOW())"
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);
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}
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// Простой парсер application/x-www-form-urlencoded.
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function parseForm(body) {
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return body
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.split("&")
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.map((pair) => pair.split("="))
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.reduce((acc, [key, value]) => {
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acc[decodeURIComponent(key)] = decodeURIComponent((value || "").replace(/\+/g, " "));
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return acc;
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}, {});
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}
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// Рендер HTML-страницы с CRUD-формами.
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function renderPage(rows, error) {
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const errorHtml = error ? `<p style="color:red">${error}</p>` : "";
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const rowsHtml = rows
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.map(
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(row) => `
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<tr>
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<td>${row.id}</td>
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<td>
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<form method="POST" action="/update">
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<input type="hidden" name="id" value="${row.id}">
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<input type="text" name="txt_content" value="${row.test_data}">
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<button type="submit">save</button>
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</form>
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</td>
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<td>
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<form method="POST" action="/delete" onsubmit="return confirm('Delete?')">
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<input type="hidden" name="id" value="${row.id}">
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<button type="submit">delete</button>
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</form>
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</td>
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</tr>`
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)
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.join("");
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return `<!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>NodeJS + Postgres Demo</title>
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<link rel="icon" href="https://nubes.ru/themes/custom/nubes/images/nubes-ico.svg" type="image/svg+xml">
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<style>
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:root { --nubes-blue: #005BFF; --nubes-dark: #1A1A1A; --nubes-grey: #F8F9FA; --nubes-border: #E5E7EB; }
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body { font-family: 'Segoe UI', Tahoma, sans-serif; margin: 0; padding: 0; background: var(--nubes-grey); color: var(--nubes-dark); }
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.header-bg { position: sticky; top: 0; z-index: 1000; background: #fff; border-bottom: 1px solid var(--nubes-border); padding: 15px 0; box-shadow: 0 2px 10px rgba(0,0,0,0.05); }
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.container { max-width: 1000px; margin: auto; padding: 0 20px; }
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.header-content { display: flex; align-items: center; justify-content: space-between; }
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.logo { height: 40px; }
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.main-content { padding: 40px 0; }
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.card { background: #fff; padding: 32px; border-radius: 16px; box-shadow: 0 4px 20px rgba(0,0,0,0.04); }
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.btn { display: inline-flex; align-items: center; justify-content: center; cursor: pointer; padding: 12px 24px; border: none; border-radius: 8px; font-weight: 600; font-size: 14px; }
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.btn-primary { background: var(--nubes-blue); color: #fff; }
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.btn-action { padding: 12px; background: #fff; border: 1px solid var(--nubes-border); border-radius: 8px; font-size: 18px; line-height: 1; cursor: pointer; min-width: 44px; }
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.btn-action:hover { background: var(--nubes-grey); border-color: var(--nubes-blue); }
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.input-group { display: flex; gap: 12px; margin-bottom: 32px; }
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input[type="text"] { flex-grow: 1; width: 100%; padding: 12px 16px; border: 1px solid var(--nubes-border); border-radius: 8px; font-size: 14px; }
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table { width: 100%; border-collapse: collapse; }
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th { text-align: left; padding: 16px; font-size: 12px; text-transform: uppercase; color: #6B7280; border-bottom: 1px solid var(--nubes-border); }
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td { padding: 16px; border-bottom: 1px solid var(--nubes-border); }
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tbody tr:nth-child(even) { background-color: #FAFBFC; }
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tbody tr:hover { background-color: #F3F4F6; }
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.id-cell { font-family: monospace; color: #9CA3AF; width: 60px; }
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.actions-cell { display: flex; gap: 12px; width: 130px; }
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</style>
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</head>
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<body>
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<div class="header-bg">
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<div class="container header-content">
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<img src="https://nubes.ru/themes/custom/nubes_2025/logo.svg" alt="Nubes" class="logo">
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<div style="font-size: 14px; color: var(--nubes-blue); font-weight: 600;">NodeJS + Postgres Demo</div>
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</div>
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</div>
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<div class="container main-content">
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<div class="card">
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${errorHtml}
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<form method="POST" action="/add" class="input-group" onsubmit="const btn=this.querySelector('button'); if(btn){btn.disabled=true; btn.textContent='Adding...';}">
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<input type="text" name="txt_content" placeholder="New message" required>
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<button type="submit" class="btn btn-primary">Add</button>
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</form>
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<table>
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<thead><tr><th>ID</th><th>Content</th><th>Actions</th></tr></thead>
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<tbody>
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${rowsHtml}
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</tbody>
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</table>
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</div>
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</div>
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</body>
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</html>`;
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}
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// Маршруты: /, /add, /update, /delete, /healthz.
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async function handleRequest(req, res) {
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const url = new URL(req.url, `http://${req.headers.host}`);
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if (req.method === "GET" && url.pathname === "/healthz") {
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res.writeHead(200, { "Content-Type": "text/plain" });
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res.end("ok");
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return;
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}
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if (req.method === "GET" && url.pathname === "/") {
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try {
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await ensureTable();
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const { rows } = await pool.query(
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"SELECT id, test_data FROM nubes_test_table ORDER BY id DESC LIMIT 20"
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);
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res.writeHead(200, { "Content-Type": "text/html; charset=utf-8" });
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res.end(renderPage(rows));
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} catch (err) {
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res.writeHead(500, { "Content-Type": "text/html; charset=utf-8" });
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res.end(renderPage([], err.message));
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}
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return;
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}
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if (req.method === "POST" && ["/add", "/update", "/delete"].includes(url.pathname)) {
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let body = "";
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req.on("data", (chunk) => {
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body += chunk;
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});
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req.on("end", async () => {
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const form = parseForm(body);
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try {
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await ensureTable();
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if (url.pathname === "/add") {
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const content = form.txt_content || "Node did it";
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// Защита от быстрых дублей подряд.
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const { rows: lastRows } = await pool.query(
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"SELECT test_data, created_at FROM nubes_test_table ORDER BY id DESC LIMIT 1"
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);
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const last = lastRows[0];
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const isDuplicate =
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last &&
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last.test_data === content &&
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Date.now() - new Date(last.created_at).getTime() < 3000;
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if (!isDuplicate) {
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await pool.query("INSERT INTO nubes_test_table (test_data) VALUES ($1)", [content]);
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}
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}
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if (url.pathname === "/update") {
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await pool.query("UPDATE nubes_test_table SET test_data=$1 WHERE id=$2", [
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form.txt_content || "",
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form.id,
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]);
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}
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if (url.pathname === "/delete") {
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await pool.query("DELETE FROM nubes_test_table WHERE id=$1", [form.id]);
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}
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res.writeHead(303, { Location: "/" });
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res.end();
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} catch (err) {
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res.writeHead(500, { "Content-Type": "text/html; charset=utf-8" });
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res.end(renderPage([], err.message));
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}
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});
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return;
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}
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res.writeHead(404, { "Content-Type": "text/plain" });
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res.end("Not found");
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}
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const port = process.env.PORT || 3000;
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const server = http.createServer(handleRequest);
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server.listen(port, () => {
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console.log(`Server running on port ${port}`);
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});
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