108 lines
3.3 KiB
JavaScript
108 lines
3.3 KiB
JavaScript
import { createReadStream, statSync } from "node:fs";
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import { createServer } from "node:http";
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import { spawn } from "node:child_process";
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import { dirname, extname, join, normalize } from "node:path";
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import { fileURLToPath } from "node:url";
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const projectRoot = dirname(fileURLToPath(import.meta.url));
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const webRoot = join(projectRoot, "web");
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const shouldOpenBrowser = !process.argv.includes("--no-open");
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const contentTypes = {
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".css": "text/css; charset=utf-8",
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".html": "text/html; charset=utf-8",
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".ico": "image/x-icon",
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".js": "text/javascript; charset=utf-8",
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".json": "application/json; charset=utf-8",
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".pak": "application/octet-stream",
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".png": "image/png",
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".wasm": "application/wasm",
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".woff2": "font/woff2",
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};
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function localPath(url) {
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const pathname = decodeURIComponent(new URL(url, "http://127.0.0.1").pathname);
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const requested = pathname === "/" ? "/apps/ep-sample-tool/" : pathname;
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const relative = normalize(requested).replace(/^([/\\])+/, "");
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const candidate = join(webRoot, relative);
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if (!candidate.startsWith(webRoot)) return null;
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try {
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return statSync(candidate).isDirectory() ? join(candidate, "index.html") : candidate;
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} catch {
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return candidate;
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}
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}
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const server = createServer((request, response) => {
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// The upstream app reports errors to /_api/err. Keep that diagnostic local.
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if (request.url?.startsWith("/_api/err")) {
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response.writeHead(204).end();
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return;
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}
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const path = localPath(request.url ?? "/");
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if (!path) {
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response.writeHead(403).end("Forbidden");
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return;
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}
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try {
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const { size } = statSync(path);
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response.writeHead(200, {
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"Cache-Control": "no-store",
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"Content-Length": size,
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"Content-Type": contentTypes[extname(path)] ?? "application/octet-stream",
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"Cross-Origin-Opener-Policy": "same-origin",
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"X-Content-Type-Options": "nosniff",
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});
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createReadStream(path).pipe(response);
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} catch {
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response.writeHead(404, { "Content-Type": "text/plain; charset=utf-8" });
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response.end("Not found");
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}
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});
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server.listen(0, "127.0.0.1", () => {
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const address = server.address();
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if (!address || typeof address === "string") throw new Error("Could not start local server");
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const url = `http://127.0.0.1:${address.port}/apps/ep-sample-tool/`;
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if (!shouldOpenBrowser) {
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console.log(`READY ${url}`);
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return;
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}
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const candidates = [
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"/Applications/Google Chrome.app/Contents/MacOS/Google Chrome",
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"/Applications/Chromium.app/Contents/MacOS/Chromium",
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"/Applications/Microsoft Edge.app/Contents/MacOS/Microsoft Edge",
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];
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const browser = candidates.find((candidate) => {
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try {
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return statSync(candidate).isFile();
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} catch {
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return false;
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}
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});
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if (!browser) {
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console.error("Google Chrome, Chromium, or Microsoft Edge is required for Web MIDI.");
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console.error(`Open this URL in a Web MIDI browser: ${url}`);
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return;
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}
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spawn(browser, [`--app=${url}`, "--new-window"], {
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detached: true,
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stdio: "ignore",
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}).unref();
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console.log("EP sample tool is running fully locally.");
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console.log(`Local address: ${url}`);
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console.log("Keep this window open while using the tool. Press Control-C to stop.");
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});
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for (const signal of ["SIGINT", "SIGTERM"]) {
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process.on(signal, () => server.close(() => process.exit(0)));
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}
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