mirror of
https://github.com/osnr/TabFS.git
synced 2024-05-17 21:16:35 +02:00
133 lines
2.7 KiB
JavaScript
133 lines
2.7 KiB
JavaScript
const ws = new WebSocket("ws://localhost:8888");
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const ops = {
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NONE: 0,
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GETATTR: 1,
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OPEN: 2,
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READDIR: 3,
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READ: 4
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};
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const unix = {
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EPERM: 1,
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ENOENT: 2,
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ESRCH: 3,
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EINTR: 4,
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EIO: 5,
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ENXIO: 6,
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// Unix file types
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S_IFMT: 0170000, // type of file mask
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S_IFIFO: 010000, // named pipe (fifo)
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S_IFCHR: 020000, // character special
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S_IFDIR: 040000, // directory
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S_IFBLK: 060000, // block special
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S_IFREG: 0100000, // regular
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S_IFLNK: 0120000, // symbolic link
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S_IFSOCK: 0140000, // socket
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}
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function UnixError(error) {
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this.name = "UnixError";
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this.error = error;
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}
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UnixError.prototype = Error.prototype;
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function queryTabs() {
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return new Promise((resolve, reject) => chrome.tabs.query({}, resolve));
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}
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const router = {
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"tabs": {
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"by-id": {
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async readdir() {
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const tabs = await queryTabs();
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return tabs.map(tab => String(tab.id));
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},
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"*": {
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async getattr() {
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return {
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st_mode: unix.S_IFREG | 0444,
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st_nlink: 1,
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st_size: 10 // FIXME
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};
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}
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}
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}
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}
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};
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function findRoute(path) {
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let route = router;
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for (let segment of path.split("/")) {
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if (segment === "") continue;
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route = route[segment] || route["*"];
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if (!route) throw new UnixError(unix.ENOENT);
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}
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return route;
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}
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async function getattr(path) {
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let route = findRoute(path);
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if (route.getattr) {
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return route.getattr();
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} else {
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return {
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st_mode: unix.S_IFDIR | 0755,
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st_nlink: 3
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};
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}
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}
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async function readdir(path) {
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let route = findRoute(path);
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if (route.readdir) {
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return route.readdir();
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}
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return Object.keys(route);
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}
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ws.onmessage = async function(event) {
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const req = JSON.parse(event.data);
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console.log('req', Object.entries(ops).find(([op, opcode]) => opcode === req.op)[0], req);
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let response = { op: req.op, error: unix.EIO };
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try {
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if (req.op === ops.GETATTR) {
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response = {
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op: ops.GETATTR,
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st_mode: 0,
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st_nlink: 0,
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st_size: 0,
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...(await getattr(req.path))
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};
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} else if (req.op === ops.OPEN) {
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throw new UnixError(unix.EIO);
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} else if (req.op === ops.READDIR) {
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response = {
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op: ops.READDIR,
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entries: [".", "..", ...(await readdir(req.path))]
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};
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} else if (req.op === ops.READ) {
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response = {
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op: ops.READ,
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buf: await read(req.path)
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};
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}
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} catch (e) {
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response = {
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op: req.op,
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error: e instanceof UnixError ? e.error : unix.EIO
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}
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}
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console.log('response', Object.entries(ops).find(([op, opcode]) => opcode === response.op)[0], response);
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ws.send(JSON.stringify(response));
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};
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