From 6bb3e72df331ef45a69fe7f76ed4b7e7babe021a Mon Sep 17 00:00:00 2001
From: Adam Hovorka <adamhovorka@gmail.com>
Date: Wed, 17 Jul 2019 12:35:46 -0600
Subject: Initial commit

---
 lib/router.js | 40 +++++++++++++++++++++++++++++++
 lib/static.js | 75 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 115 insertions(+)
 create mode 100644 lib/router.js
 create mode 100644 lib/static.js

(limited to 'lib')

diff --git a/lib/router.js b/lib/router.js
new file mode 100644
index 0000000..deb2a8c
--- /dev/null
+++ b/lib/router.js
@@ -0,0 +1,40 @@
+"use strict" // https://github.com/mixu/minimal
+
+const url = require("url");
+const degroup = path => Object.assign(path, path.groups);
+
+class Router {
+  constructor() {
+    this.routes = [];
+  }
+
+  route(req, res) {
+    const pathname = url.parse(req.url).pathname;
+    return this.routes.some(route => {
+      const isMatch = route.method === req.method && route.re.test(pathname);
+      if (isMatch) route.cb(req, res, degroup(route.re.exec(pathname)));
+      return isMatch;
+    });
+  }
+
+  gather(cb, max) { // Handle POST data
+    return (req, res, match) => {
+      let data = "";
+      req.on("data", chunk => {
+        if ((data += chunk).length > (max||1e6)) // ~1MB
+          req.connection.destroy();
+      }).on("end", () => cb(req, res, match, data));
+    };
+  }
+
+  gpost(re, cb, max) { // Laziness
+    this.post(re, this.gather(cb, max));
+  }
+}
+
+["get", "post", "put", "delete"].forEach(method =>
+  Router.prototype[method] = function(re, cb) {
+    this.routes.push({method: method.toUpperCase(), cb,
+      re: (re instanceof RegExp)? re : new RegExp(`^${re}$`)})});
+
+module.exports = Router;
diff --git a/lib/static.js b/lib/static.js
new file mode 100644
index 0000000..2be10bc
--- /dev/null
+++ b/lib/static.js
@@ -0,0 +1,75 @@
+"use strict"
+
+const Path = require("path");
+const url = require("url");
+const fs = require("fs");
+
+const mimeTypes = {
+  ".html": "text/html",
+  ".css":  "text/css",
+  ".js":   "text/javascript",
+  ".json": "application/json",
+  ".wasm": "application/wasm",
+  ".pdf":  "application/pdf",
+  ".txt":  "text/plain",
+  ".md":   "text/markdown",
+
+  ".png":  "image/png",
+  ".jpg":  "image/jpg",
+  ".svg":  "image/svg+xml",
+  ".gif":  "image/gif",
+  ".ico":  "image/x-icon",
+
+  ".wav":  "audio/wav",
+  ".mp3":  "audio/mpeg",
+  ".mp4":  "video/mp4",
+
+  ".eot":  "application/vnd.ms-fontobject",
+  ".ttf":  "application/font-ttf",
+  ".woff": "application/font-woff",
+};
+
+module.exports = class Static {
+  constructor(root) {
+    this.root = `${root||"."}`;
+    this.e404 = fs.readFileSync(`${this.root}/404.html`);
+    this.e500 = fs.readFileSync(`${this.root}/500.html`);
+  }
+
+  route(req, res) {
+    if (req.method !== "GET") {
+      res.writeHead(405, {"Content-Type": "text/plain"});
+      res.end("405 Method Not Allowed");
+      return;
+    }
+
+    const pathname = url.parse(req.url).pathname;
+    const sane = Path.normalize(pathname).replace(/^(\.\.\/)+/, "");
+    let path = `${this.root}${sane}`; //Path.join(__dirname, sane);
+
+    fs.stat(path, (err, stats) => {
+      if (err) { if (["EACCES", "ENOENT", "EPERM"].includes(err.code)) {
+        res.writeHead(404, {"Content-Type": "text/html"});
+        return res.end(this.e404);
+      } else { console.log(err);
+        res.writeHead(500, {"Content-Type": "text/html"});
+        return res.end(this.e500);
+      }}
+
+      if (stats.isDirectory()) path += "/index.html";
+      const ext = `${Path.extname(path)}`.toLowerCase();
+      const stream = fs.createReadStream(path);
+
+      stream.on("error", e => { console.log(e);
+        res.writeHead(500, {"Content-Type": "text/html"});
+        //res.end(`<pre>Error getting the file: ${e}</pre>`);
+        res.end(this.e500);
+      });
+
+      res.setHeader("Content-Type", mimeTypes[ext]||"application/octet-stream");
+      // TODO Caching?
+
+      stream.pipe(res);
+    });
+  }
+};
-- 
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