proper sample server

packages/sampler/README.md

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+# @strudel/sampler
+
+This package allows you to serve your samples on disk to the strudel REPL. 
+
+```sh
+cd ~/your/samples/ 
+npx @strudel/sampler
+```
+
+This will run a server on `http://localhost:5432`. 
+You can now load the samples via:
+
+```js
+samples('http://localhost:5432')
+```

packages/sampler/package.json

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+{
+  "name": "@strudel/sampler",
+  "version": "0.0.5",
+  "description": "",
+  "keywords": [
+    "tidalcycles",
+    "strudel",
+    "pattern",
+    "livecoding",
+    "algorave"
+  ],
+  "author": "Felix Roos <flix91@gmail.com>",
+  "license": "AGPL-3.0-or-later",
+  "bin": "./sample-server.mjs",
+  "type": "module",
+  "dependencies": {
+    "cowsay": "^1.6.0"
+  }
+}

packages/sampler/sample-server.mjs

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+#!/usr/bin/env node
+
+import cowsay from 'cowsay';
+import { createReadStream } from 'fs';
+import { readdir } from 'fs/promises';
+import http from 'http';
+import { join } from 'path';
+
+console.log(
+  cowsay.say({
+    text: 'welcome to @strudel/sampler',
+    e: 'oO',
+    T: 'U ',
+  }),
+);
+
+async function getFilesInDirectory(directory) {
+  let files = [];
+  const dirents = await readdir(directory, { withFileTypes: true });
+  for (const dirent of dirents) {
+    const fullPath = join(directory, dirent.name);
+    if (dirent.isDirectory()) {
+      const subFiles = await getFilesInDirectory(fullPath);
+      files = files.concat(subFiles);
+    } else {
+      files.push(fullPath);
+    }
+  }
+  return files;
+}
+
+async function getBanks(directory) {
+  // const directory = resolve(__dirname, '.');
+  let files = await getFilesInDirectory(directory);
+  let banks = {};
+  files = files
+    .filter((f) => ['wav', 'mp3', 'ogg'].includes(f.split('.').slice(-1)[0].toLowerCase()))
+    .map((url) => {
+      const [bank] = url.split('/').slice(-2);
+      banks[bank] = banks[bank] || [];
+      url = url.replace(directory, '');
+      banks[bank].push(url);
+      return url;
+    });
+  banks._base = `http:localhost:5432`;
+  return { banks, files };
+}
+
+const server = http.createServer(async (req, res) => {
+  res.setHeader('Access-Control-Allow-Origin', '*');
+  const directory = process.cwd();
+  const { banks, files } = await getBanks(directory);
+  if (req.url === '/') {
+    res.setHeader('Content-Type', 'application/json');
+    return res.end(JSON.stringify(banks));
+  }
+  if (!files.includes(req.url)) {
+    res.statusCode = 404;
+    res.end('File not found');
+    return;
+  }
+  const filePath = join(directory, req.url);
+  const readStream = createReadStream(filePath);
+  readStream.on('error', (err) => {
+    res.statusCode = 500;
+    res.end('Internal server error');
+    console.error(err);
+  });
+  readStream.pipe(res);
+});
+
+const port = 5432;
+server.listen(port, () => {
+  console.log(`@strudel/sampler is running on http://localhost:${port}`);
+});