Initial commit

Author: johanbook

.gitignore

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+build
+node_modules

README.md

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+# domain-file-server
+
+_This software has not been tested in regards of security and should not be used
+in a production environment_
+
+**domain-file-server** is a simplistic Nodejs file server supporting multiple
+domains. It is mainly intended to run an internal network with its own DNS server.
+
+## Configuration
+
+Create an asset folder, named `build` by default. In this folder create one
+folder for each domain that should be served. These folders should contain the
+files served on the respective domains. For example:
+
+```sh
+build
+build/localhost
+build/localhost/favicon.ico
+build/localhost/index.html
+build/mybusiness.com
+build/mybusiness.com/favicon.ico
+build/mybusiness.com/index.html
+build/mybusiness.com/script.js
+build/mybusiness.com/styles.css
+build/mycat.com
+build/mycat.com/favicon.ico
+build/mycat.com/index.html
+build/mycat.com/script.js
+```

package-lock.json

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+{
+  "name": "domain-file-server",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "devDependencies": {
+    "prettier": "^2.7.1"
+  }
+}

package.json

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+const fs = require("fs");
+const http = require("http");
+const path = require("path");
+
+const DEFAULT_INDEX_FILE = process.env.DEFAULT_INDEX_FILE || "index.html";
+const ROOT_FILE_PATH = process.env.ROOT_FILE_PATH || "build";
+
+function getFile(filePath) {
+  try {
+    const file = fs.readFileSync(filePath);
+    return file;
+  } catch {
+    console.error(`Could not find file "${filePath}"`);
+    return;
+  }
+}
+
+function getDomainFromRequest(req) {
+  const headers = req.headers;
+  const host = headers.host;
+  const domain = host.split(":")[0];
+  return domain;
+}
+
+function getFilePathFromRequest(req) {
+  return req.url.split("?")[0];
+}
+
+function createFilePath(domain, filePath) {
+  if (filePath === "/") {
+    filePath = DEFAULT_INDEX_FILE;
+  }
+  return path.join(ROOT_FILE_PATH, domain, filePath);
+}
+
+function handleRequest(req, res) {
+  const domain = getDomainFromRequest(req);
+  const filePath = getFilePathFromRequest(req);
+  console.debug("Requesting", domain, filePath);
+
+  const actualFilePath = createFilePath(domain, filePath);
+  const file = getFile(actualFilePath);
+  if (!file) {
+    res.writeHead(404);
+    res.end();
+    return;
+  }
+  res.writeHead(200);
+  res.end(file);
+}
+
+const server = http.createServer(handleRequest);
+server.listen(8080);