Module.arguments.push('-mnull', '-snull', '-vsdl:relative_mode'); Module['websocket'] = { url: function(host, port, proto) { /* openttd.org hosts a WebSocket proxy for the content service. */ if (host == "content.openttd.org" && port == 3978 && proto == "tcp") { return "wss://content.openttd.org/"; } /* Everything else just tries to make a default WebSocket connection. * If you run your own server you can setup your own WebSocket proxy in * front of it and let people connect to your server via the proxy. You * are best to add another "if" statement as above for this. */ return null; } }; Module.preRun.push(function() { personal_dir = '/home/web_user/.openttd'; content_download_dir = personal_dir + '/content_download' /* Because of the "-c" above, all user-data is stored in /user_data. */ FS.mkdir(personal_dir); FS.mount(IDBFS, {}, personal_dir); Module.addRunDependency('syncfs'); FS.syncfs(true, function (err) { /* FS.mkdir() tends to fail if parent folders do not exist. */ if (!FS.analyzePath(content_download_dir).exists) { FS.mkdir(content_download_dir); } if (!FS.analyzePath(content_download_dir + '/baseset').exists) { FS.mkdir(content_download_dir + '/baseset'); } /* Check if the OpenGFX baseset is already downloaded. */ if (!FS.analyzePath(content_download_dir + '/baseset/opengfx-0.6.0.tar').exists) { window.openttd_downloaded_opengfx = true; FS.createPreloadedFile(content_download_dir + '/baseset', 'opengfx-0.6.0.tar', 'https://installer.cdn.openttd.org/emscripten/opengfx-0.6.0.tar', true, true); } else { /* Fake dependency increase, so the counter is stable. */ Module.addRunDependency('opengfx'); Module.removeRunDependency('opengfx'); } Module.removeRunDependency('syncfs'); }); window.openttd_syncfs_shown_warning = false; window.openttd_syncfs = function() { /* Copy the virtual FS to the persistent storage. */ FS.syncfs(false, function (err) { }); /* On first time, warn the user about the volatile behaviour of * persistent storage. */ if (!window.openttd_syncfs_shown_warning) { window.openttd_syncfs_shown_warning = true; Module.onWarningFs(); } } window.openttd_exit = function() { Module.onExit(); } window.openttd_abort = function() { Module.onAbort(); } window.openttd_server_list = function() { add_server = Module.cwrap("em_openttd_add_server", null, ["string", "number"]); /* Add servers that support WebSocket here. Example: * add_server("localhost", 3979); */ } /* https://github.com/emscripten-core/emscripten/pull/12995 implements this * properly. Till that time, we use a polyfill. */ SOCKFS.websocket_sock_ops.createPeer_ = SOCKFS.websocket_sock_ops.createPeer; SOCKFS.websocket_sock_ops.createPeer = function(sock, addr, port) { let func = Module['websocket']['url']; Module['websocket']['url'] = func(addr, port, (sock.type == 2) ? 'udp' : 'tcp'); let ret = SOCKFS.websocket_sock_ops.createPeer_(sock, addr, port); Module['websocket']['url'] = func; return ret; } }); Module.postRun.push(function() { /* Check if we downloaded OpenGFX; if so, sync the virtual FS back to the * IDBFS so OpenGFX is stored persistent. */ if (window['openttd_downloaded_opengfx']) { FS.syncfs(false, function (err) { }); } });