WAR Runner Live

WAR Runner turns your Android phone into a small Java web server. It embeds Jetty 12 with Servlet 6.1 and runs real web applications packaged as WAR files. The apps are reachable from a browser on the phone itself and from any device on the same Wi-Fi or LAN. 🌐 WEB SERVER • Pick a demo from the list. It is downloaded on first use from the online catalog and verified with a SHA-256 checksum. No WAR files ship inside the app. • Serve over plain HTTP on port 8080 or HTTPS on port 8443 with a self-signed certificate. • The screen lists the addresses to open on other devices and lets you copy them. • The server keeps running in the background with a notification. Stop it from the app or from the notification. • Downloaded demos stay on the device and work offline afterwards. 🛠️ WEB ADMIN • Password protected and served over HTTPS only on port 9443. • Download catalog demos, upload your own Android-converted WAR files, and start, stop or delete them from a browser on another device. • Sessions expire after 30 minutes of inactivity, and repeated failed logins lock the login for a while. • All three ports can be changed in Settings while the server is stopped. INCLUDED DEMOS • Hello World Servlet: a minimal servlet returning plain text. • Vaadin Button Demo: a Vaadin Flow view whose click listener runs in Java on the phone. • Official Vaadin Demo: dashboard, component gallery, products, users and settings. • Vaadin Bookstore Demo: inventory editing with login (admin / admin or user / user). • Vaadin Address Book Demo: contacts kept in an in-memory H2 database. 🎯 OPEN SOURCE The build scripts for the demo WAR files, the demo sources and a guide for converting a regular WAR into an Android-compatible one are published at GitHub. GOOD TO KNOW • Requires Android 15 or newer. • Only one web application runs at a time. • The server binds to all network interfaces but only advertises Wi-Fi and Ethernet addresses. • This is an Android experiment: a demonstration of what a modern phone can run, not a hardened production server. Use it on networks you trust. • Every feature is free. Optional one-time purchases let you support the project.