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index.html
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<!DOCTYPE html>
<head>
<title>Postgres in browser</title>
<link rel="stylesheet" href="https://unpkg.com/[email protected]/css/xterm.css" />
<link rel="stylesheet" href="./styles.css" />
<script src="https://unpkg.com/[email protected]/lib/xterm-addon-fit.js"></script>
<script src="https://unpkg.com/[email protected]/lib/xterm.js"></script>
<script src="./lib/libv86.js"></script>
<script>
window.onload = () => {
const baseOptions = {
wasm_path: "./lib/v86.wasm",
memory_size: 128 * 1024 * 1024,
filesystem: {
basefs: "filesystem/filesystem.json",
baseurl: "filesystem/",
},
screen_container: document.getElementById("screen_container"),
serial_container_xtermjs: document.getElementById("terminal"),
network_relay_url: "wss://relay.widgetry.org/",
autostart: true,
disable_keyboard: true,
disable_mouse: true,
disable_speaker: true,
acpi: true,
};
const params = new URL(document.location).searchParams;
const boot = params.get("boot") === "true";
if (boot) {
document.getElementById("screen_container").style = "display:block";
document.getElementById("terminal").style = "";
}
const bzimageUrl = "./filesystem/27d6e559.bin";
const options = {
...baseOptions,
...(boot
? {
bzimage: {
url: bzimageUrl,
},
cmdline: [
"rw",
"root=host9p rootfstype=9p rootflags=version=9p2000.L,trans=virtio,cache=loose quiet acpi=off console=ttyS0 tsc=reliable mitigations=off random.trust_cpu=on nowatchdog page_poison=on",
].join(" "),
bios: {
url: "./bios/seabios.bin",
},
vga_bios: {
url: "./bios/vgabios.bin",
},
}
: { initial_state: { url: "./state/v86state.bin.zst" } }),
};
var emulator = new V86Starter(options);
function initTerm() {
const fitAddon = new FitAddon.FitAddon();
emulator.serial_adapter.term.loadAddon(fitAddon);
fitAddon.fit();
window.addEventListener("resize", () => fitAddon.fit());
}
function sendBackgroundCommands(commands) {
const filename = `${(Math.random() + 1).toString(36).substring(7)}.sh`;
emulator.create_file(
`/inbox/${filename}`,
new TextEncoder("UTF-8").encode(commands.join("\n"))
);
}
if (!boot) {
emulator.add_listener("emulator-ready", function () {
initTerm();
setTimeout(() => {
sendBackgroundCommands(["/etc/init.d/S40network restart"]);
emulator.serial0_send(
`\\! stty rows ${emulator.serial_adapter.term.rows} cols ${emulator.serial_adapter.term.cols} && reset\n`
);
emulator.serial_adapter.term.focus();
}, 0);
});
}
var state;
document.getElementById("save_restore").onclick = async function () {
var button = this;
if (state) {
button.value = "Save state";
await emulator.restore_state(state);
state = undefined;
} else {
const new_state = await emulator.save_state();
console.log("Saved state of " + new_state.byteLength + " bytes");
button.value = "Restore state";
state = new_state;
}
button.blur();
};
document.getElementById("save_file").onclick = async function () {
const new_state = await emulator.save_state();
var a = document.createElement("a");
a.download = "v86state.bin";
a.href = window.URL.createObjectURL(new Blob([new_state]));
a.dataset.downloadurl =
"application/octet-stream:" + a.download + ":" + a.href;
a.click();
this.blur();
};
document.getElementById("restore_file").onchange = function () {
if (this.files.length) {
var filereader = new FileReader();
emulator.stop();
filereader.onload = async function (e) {
await emulator.restore_state(e.target.result);
emulator.run();
};
filereader.readAsArrayBuffer(this.files[0]);
this.value = "";
}
this.blur();
};
document.getElementById("upload_files").onchange = function (e) {
var files = e.target.files;
for (var i = 0; i < files.length; i++) {
var reader = new FileReader();
reader.onload = (function (file) {
return function (e) {
var data = new TextEncoder("UTF-8").encode(e.target.result);
emulator.create_file("/" + file.name, data);
console.log("uploaded " + file.name);
};
})(files[i]);
reader.readAsText(files[i]);
}
};
const uploadBtns = document.getElementsByClassName("upload-btn");
for (let btn of uploadBtns) {
btn.addEventListener("click", (event) => {
const input = btn.getElementsByTagName("input")[0];
input.click(event);
});
}
};
</script>
</head>
<body>
<div id="screen_container" style="display: none">
<div></div>
<canvas></canvas>
</div>
<div id="menu">
<div>
<input id="save_restore" type="button" value="Save state" />
<input id="save_file" type="button" value="Save state to file" />
</div>
<div style="display: flex">
<div class="upload-btn">
<input id="restore_file" type="file" hidden />
<p>Restore from file</p>
</div>
<div class="upload-btn">
<input id="upload_files" type="file" multiple hidden />
<p>Upload files to the emulator</p>
</div>
</div>
</div>
<div class="container">
<div class="xterminal">
<div id="terminal"></div>
</div>
</div>
</body>