fix

server.js

@@ -0,0 +1,88 @@
+const express = require("express");
+const fs = require("fs/promises");
+const path = require("path");
+const crypto = require("crypto");
+
+const app = express();
+const PORT = process.env.PORT || 5180;
+const DB_PATH = path.join(__dirname, "data", "shaders.json");
+
+app.use(express.json({ limit: "1mb" }));
+app.use(express.static(__dirname));
+
+async function ensureDb() {
+  await fs.mkdir(path.dirname(DB_PATH), { recursive: true });
+  try {
+    await fs.access(DB_PATH);
+  } catch {
+    await fs.writeFile(DB_PATH, "[]", "utf8");
+  }
+}
+
+async function readDb() {
+  await ensureDb();
+  const raw = await fs.readFile(DB_PATH, "utf8");
+  return JSON.parse(raw);
+}
+
+async function writeDb(list) {
+  await ensureDb();
+  await fs.writeFile(DB_PATH, JSON.stringify(list, null, 2), "utf8");
+}
+
+app.get("/api/shaders", async (_req, res) => {
+  try {
+    const shaders = await readDb();
+    res.json(shaders);
+  } catch {
+    res.status(500).json({ error: "读取失败" });
+  }
+});
+
+app.post("/api/shaders", async (req, res) => {
+  const { name, author = "unknown", code } = req.body || {};
+  if (!name || typeof name !== "string") {
+    return res.status(400).json({ error: "name 必填" });
+  }
+  if (!code || typeof code !== "string" || !code.includes("mainImage")) {
+    return res.status(400).json({ error: "code 必须包含 mainImage" });
+  }
+
+  try {
+    const shaders = await readDb();
+    const item = {
+      id: crypto.randomUUID(),
+      name: name.trim(),
+      author: String(author || "unknown").trim() || "unknown",
+      code,
+      views: Math.floor(3000 + Math.random() * 22000),
+      likes: Math.floor(40 + Math.random() * 700),
+      createdAt: new Date().toISOString(),
+    };
+    shaders.unshift(item);
+    await writeDb(shaders);
+    res.status(201).json(item);
+  } catch {
+    res.status(500).json({ error: "保存失败" });
+  }
+});
+
+app.delete("/api/shaders/:id", async (req, res) => {
+  try {
+    const shaders = await readDb();
+    const next = shaders.filter((it) => it.id !== req.params.id);
+    if (next.length === shaders.length) {
+      return res.status(404).json({ error: "未找到该 shader" });
+    }
+    await writeDb(next);
+    res.status(204).end();
+  } catch {
+    res.status(500).json({ error: "删除失败" });
+  }
+});
+
+ensureDb().then(() => {
+  app.listen(PORT, () => {
+    console.log(`Server running: http://localhost:${PORT}`);
+  });
+});