web-3Dviever-glb/server.js

Repository

web-3Dviever-glb

Original path

web-3Dviever-glb/server.js

Role

SOURCE

Size

2798 bytes

Lines

63

SHA-256

555c4a893d51756dd844ec7e356d5acdcffec26766973ba39b13f1cd2b5ca8f6

Displayed range

1–63

import express from "express";
import path from "path";
import fs from "fs";
import { fileURLToPath } from "url";

const app = express();
const PORT = Number(process.env.PORT || 7600);
const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);
const indexPath = path.join(__dirname, "index.html");
const manifestPath = path.join(__dirname, "models.json");
const inputDirectory = path.join(__dirname, "input");
const SUPPORTED_EXTENSIONS = new Set([".ply", ".glb", ".gltf"]);

function extensionPriority(fileName) {
  const extension = path.extname(fileName).toLowerCase();
  if (extension === ".glb") return 0;
  if (extension === ".gltf") return 1;
  if (extension === ".ply") return 2;
  return 9;
}

function compareModels(left, right) {
  const leftBase = path.basename(left, path.extname(left));
  const rightBase = path.basename(right, path.extname(right));
  const baseComparison = leftBase.localeCompare(rightBase, "pl", { numeric: true, sensitivity: "base" });
  return baseComparison !== 0 ? baseComparison : extensionPriority(left) - extensionPriority(right);
}

function readModels() {
  fs.mkdirSync(inputDirectory, { recursive: true });
  return fs.readdirSync(inputDirectory, { withFileTypes: true })
    .filter((entry) => entry.isFile())
    .map((entry) => entry.name)
    .filter((name) => SUPPORTED_EXTENSIONS.has(path.extname(name).toLowerCase()))
    .sort(compareModels);
}

app.disable("x-powered-by");
app.get("/api/models", (_req, res) => { res.setHeader("Cache-Control", "no-store"); res.json(readModels()); });
app.get("/models.json", (_req, res) => {
  res.setHeader("Cache-Control", "no-store");
  return fs.existsSync(manifestPath) ? res.sendFile(manifestPath) : res.json(readModels());
});
app.use("/input", express.static(inputDirectory, {
  etag: false, maxAge: 0, acceptRanges: true,
  setHeaders: (res, filePath) => {
    const extension = path.extname(filePath).toLowerCase();
    if (extension === ".glb") res.setHeader("Content-Type", "model/gltf-binary");
    else if (extension === ".gltf") res.setHeader("Content-Type", "model/gltf+json");
    else if (extension === ".ply") res.setHeader("Content-Type", "application/octet-stream");
    res.setHeader("Cache-Control", "no-store");
  }
}));
app.get(["/", "/index.html"], (_req, res) => { res.setHeader("Cache-Control", "no-store"); res.sendFile(indexPath); });
app.get("/favicon.ico", (_req, res) => res.status(204).end());
app.listen(PORT, () => {
  console.log(`Scaniverse GLB Web Viewer: http://localhost:${PORT}`);
  for (const model of readModels()) {
    const stats = fs.statSync(path.join(inputDirectory, model));
    console.log(`- ${model} (${(stats.size / 1024 / 1024).toFixed(1)} MB)`);
  }
});