feat: working mvp of a good enough server for express and socket io

.gitignore

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LICENSE

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+MIT License
+
+Copyright (c) 2023 Sepehr Laal
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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+# fakettp
+
+fake browser side http server via service workers with node api compatibility.
+
+# usage
+
+## bundlers
+
+you can alias `http` to `fakettp` in your bundler config to use it as a drop in
+replacement for node's http module. Example webpack config:
+
+```sh
+npm install fakettp --save-dev
+```
+
+```js
+module.exports = {
+  resolve: {
+    alias: {
+      http: "fakettp",
+    },
+    // or
+    fallback: {
+      http: require.resolve("fakettp"),
+    }
+  },
+};
+```
+
+## browsers
+
+this is a library primarily intended for use in bundlers like webpack.
+example use case would be running an express app or socket io app locally.
+
+a single global variable `FAKETTP` is exposed which partially implements socket,
+net.stream, and net.server, and net.http interfaces from node.
+
+it currently implements enough to run most express and socket io apps untouched.
+socket io needs to be tuned in client side to use polling and not web sockets.
+
+`http.createServer` is the main entry point (or rather `FAKETTP.createServer`).
+fakettp is built into a UMD module, so it can be used in bundlers or browsers.
+
+# example
+
+![demo](./ext/demo.png)
+
+You can create a server and listen like so:
+
+```js
+FAKETTP.createServer().on("request", (req, res) => {
+  req.on('data', (chunk) => {
+    console.log(`Received ${chunk.length} bytes of data in request body.`);
+    console.log(`Request chunk: ${chunk.toString()}`);
+  });
+  req.on('end', () => {
+    console.log('No more data in request body.');
+  });
+  res.writeHead(200, { 'Content-Type': 'text/plain' });
+  res.end('{"yo":"nice"}');
+}).listen();
+```
+
+![listen](./ext/listen.png)
+
+After that all requests will be intercepted and handled by the service worker.
+Only requests to the same origin will be intercepted (excluding worker itself).
+The HTML page loading the worker is also excluded from interception.
+
+You can for example send a request to the server like so:
+
+```js
+async function postData(data = {}, url = "test.html") {
+  const response = await fetch(url, {
+    method: "POST",
+    headers: {
+      "Content-Type": "application/json",
+    },
+    body: JSON.stringify(data),
+  });
+  return response.json();
+}
+
+postData({ answer: "browser" }).then((data) => {
+  console.log(data);
+});
+```
+
+![response](./ext/response.png)
+
+# development
+
+- Run `npm run build` to build the project.
+- Run `npm run serve` to start webpack dev server.
+- Run `npm run watch` to watch for changes and rebuild.
+- Run `npx http-serve --cors dist` to run production build.
+
+in dev modes, verbose logging is enabled. in production, it is disabled.