kalkulyator-kaloriy/server.js

83 lines
2.9 KiB
JavaScript

const http = require("http");
const fs = require("fs");
const path = require("path");
const PORT = process.env.PORT || 3000;
const DATA = path.join(__dirname, "data.json");
function readData() {
try { return JSON.parse(fs.readFileSync(DATA, "utf8")); } catch (_) { return { profile: null, entries: [] }; }
}
function writeData(data) {
fs.writeFileSync(DATA, JSON.stringify(data, null, 2));
}
function body(req) {
return new Promise((resolve) => {
let s = "";
req.on("data", (c) => (s += c));
req.on("end", () => { try { resolve(JSON.parse(s || "{}")); } catch (_) { resolve({}); } });
});
}
http.createServer(async (req, res) => {
res.setHeader("Access-Control-Allow-Origin", "*");
res.setHeader("Access-Control-Allow-Methods", "GET, POST, DELETE, OPTIONS");
res.setHeader("Access-Control-Allow-Headers", "Content-Type");
if (req.method === "OPTIONS") {
res.writeHead(200);
return res.end();
}
const url = req.url.split("?")[0];
// API: профиль
if (req.method === "GET" && url === "/api/profile") {
const data = readData();
res.writeHead(200, { "Content-Type": "application/json" });
return res.end(JSON.stringify(data.profile));
}
if (req.method === "POST" && url === "/api/profile") {
const profile = await body(req);
const data = readData();
data.profile = { ...profile, updatedAt: new Date().toISOString() };
writeData(data);
res.writeHead(200, { "Content-Type": "application/json" });
return res.end(JSON.stringify({ ok: true }));
}
// API: записи дневника
if (req.method === "GET" && url === "/api/entries") {
const data = readData();
res.writeHead(200, { "Content-Type": "application/json" });
return res.end(JSON.stringify(data.entries));
}
if (req.method === "POST" && url === "/api/entries") {
const entry = await body(req);
const data = readData();
data.entries.push({ id: Date.now(), ...entry });
writeData(data);
res.writeHead(200, { "Content-Type": "application/json" });
return res.end(JSON.stringify({ ok: true }));
}
if (req.method === "DELETE" && url === "/api/entries") {
const { id } = await body(req);
const data = readData();
data.entries = data.entries.filter(e => e.id !== id);
writeData(data);
res.writeHead(200, { "Content-Type": "application/json" });
return res.end(JSON.stringify({ ok: true }));
}
// Статика
let file = url === "/" ? "/index.html" : url;
const full = path.join(__dirname, file);
if (full.startsWith(__dirname) && fs.existsSync(full) && fs.statSync(full).isFile()) {
const ext = path.extname(full);
const type = ext === ".css" ? "text/css" : ext === ".js" ? "application/javascript" : "text/html";
res.writeHead(200, { "Content-Type": type + "; charset=utf-8" });
return res.end(fs.readFileSync(full));
}
res.writeHead(404); res.end("Not found");
}).listen(PORT, () => console.log("Сервер на порту " + PORT));