Justin D'Arcangelo justindarc

Introducing FlyWeb

For the past several months, a small team at Mozilla has been working on an experimental new Web API and an accompanying browser feature called FlyWeb.

What does it do?

In short, FlyWeb provides an API for web pages to host local web servers for exposing content and services to nearby browsers. It also adds the ability to discover and connect to nearby local web servers to the web browser itself. This feature allows users to find and connect to nearby devices with embedded web servers such as printers, thermostats and televisions as well as local web servers hosted in web pages via the FlyWeb API.

Enabling web pages to host local servers and providing the ability for the web browser to discover nearby servers opens up a whole new range of use cases for web apps. With FlyWeb, we can finally reach a level of richness in cross-device interactions previously only attainable via native apps. In addition, the built-in service discovery feature in the browser offers device makers and hob

	from django.db.models import ManyToOneRel
	from django_filters import rest_framework as filters

	def get_dynamic_filterset_filters(model_cls, prefix=None):
	"""Get dynamic dictionary containing all fields and filter expressions for the specified model class."""
	field_filters = {}

	for field in model_cls._meta.get_fields():
	if isinstance(field, ManyToOneRel):
	continue

	package com.example.trackvisibilityexample

	import android.os.Bundle
	import android.util.Log
	import androidx.activity.ComponentActivity
	import androidx.activity.compose.setContent
	import androidx.activity.enableEdgeToEdge
	import androidx.compose.foundation.layout.Box
	import androidx.compose.foundation.layout.fillMaxWidth
	import androidx.compose.foundation.layout.height

	//
	// ObservableCollectionViewCell.swift
	//
	// Created by Justin D'Arcangelo on 7/3/25.
	//

	import UIKit

	class ObservableCollectionViewCell: UICollectionViewCell {
	var isMostlyVisible: Bool {

	import UIKit

	@UIApplicationMain
	class AppDelegate: UIResponder, UIApplicationDelegate {
	var window: UIWindow?

	func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
	let secondStoryboard = UIStoryboard(name: "SecondScreen", bundle: nil)
	let secondScreenVC = secondStoryboard.instantiateInitialViewController() as! SecondScreenViewController
	secondScreenVC.loadViewIfNeeded()

	#!/usr/bin/env node

	/**
	* txt2cdefine: Encode multiline text files into C/C++ #define directives
	* https://gist.github.com/justindarc/efee6d3d09341618da5af6a58dfd7b69
	*
	* Node.js-based command-line utility for encoding HTML, JS, CSS and other
	* text files into C/C++ #define directives. Useful for embedded hardware
	* applications such as Arduino or ESP8266 where no file system is available
	* for reading external files. The resulting output can saved as a ".h"

	navigator.publishServer('HelloFlyWeb').then((srv) => {
	(window.srv = srv).onfetch = (evt) => {
	evt.respondWith(new Response('<h1>Hello FlyWeb!!!</h1>', {
	headers: { 'Content-Type': 'text/html' }
	}));
	};
	});

	// Install ESP8266 Board v2.1.0 by adding this
	// to the "Additional Board Manager URLs" in
	// "Preferences..." and then select it for
	// installation via "Boards Manager..." under
	// the "Tools" -> "Board: XXX" menu.
	// http://arduino.esp8266.com/stable/package_esp8266com_index.json
	#include <ESP8266WiFi.h>
	#include <ESP8266WebServer.h>
	#include <ESP8266mDNS.h>
	#include <WiFiUdp.h>

	var http = require('http');
	var mdns = require('mdns');

	const HTTP_PORT = 8000;

	var server = http.createServer(function(request, response) {
	response.end('Hello world!');
	});

	server.listen(HTTP_PORT);

	timestamp () {
	date -r $(echo "$1" \| cut -c "1-10")
	}