617 lines
19 KiB
TypeScript
617 lines
19 KiB
TypeScript
import {
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cors,
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deleteCookie,
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getCookie,
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Hono,
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HonoRequest,
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setCookie,
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} from "./deps.ts";
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import { AssetBundle } from "../plugos/asset_bundle/bundle.ts";
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import { FileMeta } from "$sb/types.ts";
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import { ShellRequest } from "./rpc.ts";
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import { determineShellBackend } from "./shell_backend.ts";
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import { SpaceServer, SpaceServerConfig } from "./instance.ts";
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import { KvPrimitives } from "../plugos/lib/kv_primitives.ts";
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import { PrefixedKvPrimitives } from "../plugos/lib/prefixed_kv_primitives.ts";
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import { base64Encode } from "../plugos/asset_bundle/base64.ts";
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const authenticationExpirySeconds = 60 * 60 * 24 * 7; // 1 week
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export type ServerOptions = {
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hostname: string;
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port: number;
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clientAssetBundle: AssetBundle;
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plugAssetBundle: AssetBundle;
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baseKvPrimitives: KvPrimitives;
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certFile?: string;
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keyFile?: string;
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configs: Map<string, SpaceServerConfig>;
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};
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export class HttpServer {
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abortController?: AbortController;
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clientAssetBundle: AssetBundle;
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plugAssetBundle: AssetBundle;
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hostname: string;
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port: number;
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app: Hono;
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keyFile: string | undefined;
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certFile: string | undefined;
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spaceServers = new Map<string, Promise<SpaceServer>>();
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baseKvPrimitives: KvPrimitives;
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configs: Map<string, SpaceServerConfig>;
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constructor(options: ServerOptions) {
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this.app = new Hono();
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this.clientAssetBundle = options.clientAssetBundle;
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this.plugAssetBundle = options.plugAssetBundle;
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this.hostname = options.hostname;
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this.port = options.port;
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this.keyFile = options.keyFile;
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this.certFile = options.certFile;
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this.baseKvPrimitives = options.baseKvPrimitives;
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this.configs = options.configs;
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}
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async bootSpaceServer(config: SpaceServerConfig): Promise<SpaceServer> {
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const spaceServer = new SpaceServer(
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config,
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determineShellBackend(config.pagesPath),
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this.plugAssetBundle,
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new PrefixedKvPrimitives(this.baseKvPrimitives, [
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config.namespace,
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]),
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);
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await spaceServer.init();
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return spaceServer;
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}
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determineConfig(req: HonoRequest): [string, SpaceServerConfig] {
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const url = new URL(req.url);
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let hostname = url.host; // hostname:port
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// First try a full match
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let config = this.configs.get(hostname);
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if (config) {
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return [hostname, config];
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}
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// Then rip off the port and try again
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hostname = hostname.split(":")[0];
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config = this.configs.get(hostname);
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if (config) {
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return [hostname, config];
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}
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// If all else fails, try the wildcard
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config = this.configs.get("*");
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if (config) {
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return ["*", config];
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}
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throw new Error(`No space server config found for hostname ${hostname}`);
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}
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ensureSpaceServer(req: HonoRequest): Promise<SpaceServer> {
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const [matchedHostname, config] = this.determineConfig(req);
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const spaceServer = this.spaceServers.get(matchedHostname);
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if (spaceServer) {
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return spaceServer;
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}
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// And then boot the thing, async
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const spaceServerPromise = this.bootSpaceServer(config);
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// But immediately write the promise to the map so that we don't boot it twice
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this.spaceServers.set(matchedHostname, spaceServerPromise);
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return spaceServerPromise;
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}
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// Replaces some template variables in index.html in a rather ad-hoc manner, but YOLO
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renderIndexHtml(spaceServer: SpaceServer) {
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return this.clientAssetBundle.readTextFileSync(".client/index.html")
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.replaceAll(
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"{{SPACE_PATH}}",
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spaceServer.pagesPath.replaceAll("\\", "\\\\"),
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// );
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).replaceAll(
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"{{SYNC_ONLY}}",
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spaceServer.syncOnly ? "true" : "false",
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).replaceAll(
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"{{CLIENT_ENCRYPTION}}",
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spaceServer.clientEncryption ? "true" : "false",
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);
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}
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start() {
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// Serve static files (javascript, css, html)
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this.serveStatic();
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this.addAuth();
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this.addFsRoutes();
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// Fallback, serve the UI index.html
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this.app.use("*", async (c) => {
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const spaceServer = await this.ensureSpaceServer(c.req);
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return c.html(this.renderIndexHtml(spaceServer), 200, {
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"Cache-Control": "no-cache",
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});
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});
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this.abortController = new AbortController();
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const listenOptions: any = {
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hostname: this.hostname,
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port: this.port,
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signal: this.abortController.signal,
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};
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if (this.keyFile) {
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listenOptions.key = Deno.readTextFileSync(this.keyFile);
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}
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if (this.certFile) {
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listenOptions.cert = Deno.readTextFileSync(this.certFile);
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}
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// Start the actual server
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Deno.serve(listenOptions, this.app.fetch);
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const visibleHostname = this.hostname === "0.0.0.0"
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? "localhost"
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: this.hostname;
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console.log(
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`SilverBullet is now running: http://${visibleHostname}:${this.port}`,
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);
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}
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serveStatic() {
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this.app.use("*", async (c, next) => {
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const req = c.req;
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const spaceServer = await this.ensureSpaceServer(req);
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const url = new URL(req.url);
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// console.log("URL", url);
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if (
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url.pathname === "/"
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) {
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// Serve the UI (index.html)
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// Note: we're explicitly not setting Last-Modified and If-Modified-Since header here because this page is dynamic
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return c.html(this.renderIndexHtml(spaceServer), 200, {
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"Cache-Control": "no-cache",
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});
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}
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try {
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const assetName = url.pathname.slice(1);
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if (!this.clientAssetBundle.has(assetName)) {
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return next();
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}
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if (
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this.clientAssetBundle.has(assetName) &&
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req.header("If-Modified-Since") ===
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utcDateString(this.clientAssetBundle.getMtime(assetName)) &&
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assetName !== "service_worker.js"
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) {
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return c.body(null, 304);
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}
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c.status(200);
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c.header("Content-type", this.clientAssetBundle.getMimeType(assetName));
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let data: Uint8Array | string = this.clientAssetBundle.readFileSync(
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assetName,
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);
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c.header("Cache-Control", "no-cache");
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c.header("Content-length", "" + data.length);
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if (assetName !== "service_worker.js") {
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c.header(
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"Last-Modified",
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utcDateString(this.clientAssetBundle.getMtime(assetName)),
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);
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}
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if (req.method === "GET") {
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if (assetName === "service_worker.js") {
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const textData = new TextDecoder().decode(data);
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// console.log(
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// "Swapping out config hash in service worker",
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// );
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data = textData.replaceAll(
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"{{CONFIG_HASH}}",
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base64Encode(
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JSON.stringify([
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spaceServer.clientEncryption,
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spaceServer.syncOnly,
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]),
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),
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);
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}
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return c.body(data);
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} // else e.g. HEAD, OPTIONS, don't send body
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} catch {
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return next();
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}
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});
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}
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private addAuth() {
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const excludedPaths = [
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"/manifest.json",
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"/favicon.png",
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"/logo.png",
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"/.auth",
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];
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// Middleware handling the /.auth page and flow
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this.app.all("/.auth", async (c) => {
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const url = new URL(c.req.url);
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const req = c.req;
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const host = url.host; // e.g. localhost:3000
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if (url.search === "?logout") {
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deleteCookie(c, authCookieName(host));
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}
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if (req.method === "GET") {
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return c.html(
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this.clientAssetBundle.readTextFileSync(".client/auth.html"),
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);
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} else if (req.method === "POST") {
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const values = await c.req.parseBody();
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const username = values["username"];
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const password = values["password"];
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const spaceServer = await this.ensureSpaceServer(req);
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const { user: expectedUser, pass: expectedPassword } = spaceServer
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.auth!;
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if (username === expectedUser && password === expectedPassword) {
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// Generate a JWT and set it as a cookie
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const jwt = await spaceServer.jwtIssuer.createJWT(
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{ username },
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authenticationExpirySeconds,
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);
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console.log("Successful auth");
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setCookie(c, authCookieName(host), jwt, {
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expires: new Date(
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Date.now() + authenticationExpirySeconds * 1000,
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), // in a week
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// sameSite: "Strict",
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// httpOnly: true,
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});
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return c.redirect("/");
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} else {
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return c.redirect("/.auth?error=1");
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}
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} else {
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return c.redirect("/.auth");
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}
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});
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// Check auth
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this.app.use("*", async (c, next) => {
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const req = c.req;
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const spaceServer = await this.ensureSpaceServer(req);
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if (!spaceServer.auth) {
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// Auth disabled in this config, skip
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return next();
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}
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const url = new URL(req.url);
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const host = url.host;
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if (!excludedPaths.includes(url.pathname)) {
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const authCookie = getCookie(c, authCookieName(host));
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if (!authCookie && spaceServer.authToken) {
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// Attempt Bearer Authorization based authentication
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const authHeader = req.header("Authorization");
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if (authHeader && authHeader.startsWith("Bearer ")) {
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const authToken = authHeader.slice("Bearer ".length);
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if (authToken === spaceServer.authToken) {
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// All good, let's proceed
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return next();
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} else {
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console.log(
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"Unauthorized token access, redirecting to auth page",
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);
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return c.text("Unauthorized", 401);
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}
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}
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}
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if (!authCookie) {
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console.log("Unauthorized access, redirecting to auth page");
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return c.redirect("/.auth");
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}
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const { user: expectedUser } = spaceServer.auth!;
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try {
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const verifiedJwt = await spaceServer.jwtIssuer.verifyAndDecodeJWT(
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authCookie,
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);
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if (verifiedJwt.username !== expectedUser) {
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throw new Error("Username mismatch");
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}
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} catch (e: any) {
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console.error(
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"Error verifying JWT, redirecting to auth page",
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e.message,
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);
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return c.redirect("/.auth");
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}
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}
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return next();
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});
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}
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private addFsRoutes() {
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this.app.use(
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"*",
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cors({
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origin: "*",
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allowHeaders: ["*"],
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exposeHeaders: ["*"],
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allowMethods: ["GET", "POST", "PUT", "DELETE", "HEAD", "OPTIONS"],
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}),
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);
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// File list
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this.app.get(
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"/index.json",
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async (c) => {
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const req = c.req;
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const spaceServer = await this.ensureSpaceServer(req);
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if (req.header("X-Sync-Mode")) {
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// Only handle direct requests for a JSON representation of the file list
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const files = await spaceServer.spacePrimitives.fetchFileList();
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return c.json(files, 200, {
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"X-Space-Path": spaceServer.pagesPath,
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});
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} else {
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// Otherwise, redirect to the UI
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// The reason to do this is to handle authentication systems like Authelia nicely
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return c.redirect("/");
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}
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},
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);
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// RPC shell
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this.app.post("/.rpc/shell", async (c) => {
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const req = c.req;
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const spaceServer = await this.ensureSpaceServer(req);
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const body = await req.json();
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try {
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const shellCommand: ShellRequest = body;
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const shellResponse = await spaceServer.shellBackend.handle(
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shellCommand,
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);
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return c.json(shellResponse);
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} catch (e: any) {
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console.log("Shell error", e);
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return c.text(e.message, 500);
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}
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});
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// RPC syscall
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this.app.post("/.rpc/:plug/:syscall", async (c) => {
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const req = c.req;
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const plugName = req.param("plug")!;
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const syscall = req.param("syscall")!;
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const spaceServer = await this.ensureSpaceServer(req);
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const body = await req.json();
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try {
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if (spaceServer.syncOnly) {
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return c.text("Sync only mode, no syscalls allowed", 400);
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}
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const args: string[] = body;
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try {
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const plug = spaceServer.system!.loadedPlugs.get(plugName);
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if (!plug) {
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throw new Error(`Plug ${plugName} not found`);
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}
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const result = await plug.syscall(syscall, args);
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return c.json({
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result: result,
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});
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} catch (e: any) {
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return c.json({
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error: e.message,
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}, 500);
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}
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} catch (e: any) {
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console.log("Error", e);
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return c.text(e.message, 500);
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}
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});
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const filePathRegex = "/:path{[^!].+\\.[a-zA-Z]+}";
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this.app.get(
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filePathRegex,
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async (c) => {
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const req = c.req;
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const name = req.param("path")!;
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const spaceServer = await this.ensureSpaceServer(req);
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console.log(
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"Requested file",
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name,
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);
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if (
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name.endsWith(".md") &&
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// This header signififies the requests comes directly from the http_space_primitives client (not the browser)
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!req.header("X-Sync-Mode") &&
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// This Accept header is used by federation to still work with CORS
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req.header("Accept") !==
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"application/octet-stream" &&
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req.header("sec-fetch-mode") !== "cors"
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) {
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// It can happen that during a sync, authentication expires, this may result in a redirect to the login page and then back to this particular file. This particular file may be an .md file, which isn't great to show so we're redirecting to the associated SB UI page.
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console.warn(
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"Request was without X-Sync-Mode nor a CORS request, redirecting to page",
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);
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return c.redirect(`/${name.slice(0, -3)}`);
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}
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if (name.startsWith(".")) {
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// Don't expose hidden files
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return c.notFound();
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}
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// Handle federated links through a simple redirect, only used for attachments loads with service workers disabled
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if (name.startsWith("!")) {
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let url = name.slice(1);
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console.log("Handling this as a federated link", url);
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if (url.startsWith("localhost")) {
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url = `http://${url}`;
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} else {
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url = `https://${url}`;
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}
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try {
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const req = await fetch(url);
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// Override X-Permssion header to always be "ro"
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const newHeaders = new Headers();
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for (const [key, value] of req.headers.entries()) {
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newHeaders.set(key, value);
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}
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newHeaders.set("X-Permission", "ro");
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return new Response(req.body, {
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status: req.status,
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headers: newHeaders,
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});
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} catch (e: any) {
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console.error("Error fetching federated link", e);
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return c.text(e.message, 500);
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}
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}
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try {
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if (req.header("X-Get-Meta")) {
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// Getting meta via GET request
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const fileData = await spaceServer.spacePrimitives.getFileMeta(
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name,
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);
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return c.text("", 200, this.fileMetaToHeaders(fileData));
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}
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const fileData = await spaceServer.spacePrimitives.readFile(name);
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const lastModifiedHeader = new Date(fileData.meta.lastModified)
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.toUTCString();
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if (
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req.header("If-Modified-Since") === lastModifiedHeader
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) {
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return c.body(null, 304);
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}
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return c.body(fileData.data, 200, {
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...this.fileMetaToHeaders(fileData.meta),
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"Last-Modified": lastModifiedHeader,
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});
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} catch (e: any) {
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console.error("Error GETting file", name, e.message);
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return c.notFound();
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}
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},
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).put(
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async (c) => {
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const req = c.req;
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const name = req.param("path")!;
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const spaceServer = await this.ensureSpaceServer(req);
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console.log("Saving file", name);
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if (name.startsWith(".")) {
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// Don't expose hidden files
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return c.text("Forbidden", 403);
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}
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const body = await req.arrayBuffer();
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try {
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const meta = await spaceServer.spacePrimitives.writeFile(
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name,
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new Uint8Array(body),
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);
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return c.text("OK", 200, this.fileMetaToHeaders(meta));
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} catch (err) {
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console.error("Write failed", err);
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return c.text("Write failed", 500);
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}
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},
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).delete(async (c) => {
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const req = c.req;
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const name = req.param("path")!;
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const spaceServer = await this.ensureSpaceServer(req);
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console.log("Deleting file", name);
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if (name.startsWith(".")) {
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// Don't expose hidden files
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return c.text("Forbidden", 403);
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}
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try {
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await spaceServer.spacePrimitives.deleteFile(name);
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return c.text("OK");
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} catch (e: any) {
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console.error("Error deleting attachment", e);
|
|
return c.text(e.message, 500);
|
|
}
|
|
}).options();
|
|
|
|
// Federation proxy
|
|
const proxyPathRegex = "/:uri{!.+}";
|
|
this.app.all(
|
|
proxyPathRegex,
|
|
async (c, next) => {
|
|
const req = c.req;
|
|
let url = req.param("uri")!.slice(1);
|
|
if (!req.header("X-Proxy-Request")) {
|
|
// Direct browser request, not explicity fetch proxy request
|
|
if (!/\.[a-zA-Z0-9]+$/.test(url)) {
|
|
console.log("Directly loading federation page via URL:", url);
|
|
// This is not a direct file reference so LIKELY a page request, fall through and load the SB UI
|
|
return next();
|
|
}
|
|
}
|
|
if (url.startsWith("localhost")) {
|
|
url = `http://${url}`;
|
|
} else {
|
|
url = `https://${url}`;
|
|
}
|
|
try {
|
|
const safeRequestHeaders = new Headers();
|
|
for (
|
|
const headerName of ["Authorization", "Accept", "Content-Type"]
|
|
) {
|
|
if (req.header(headerName)) {
|
|
safeRequestHeaders.set(
|
|
headerName,
|
|
req.header(headerName)!,
|
|
);
|
|
}
|
|
}
|
|
const body = await req.arrayBuffer();
|
|
const fetchReq = await fetch(url, {
|
|
method: req.method,
|
|
headers: safeRequestHeaders,
|
|
body: body.byteLength > 0 ? body : undefined,
|
|
});
|
|
const responseHeaders: Record<string, any> = {};
|
|
for (const [key, value] of fetchReq.headers.entries()) {
|
|
responseHeaders[key] = value;
|
|
}
|
|
return c.body(fetchReq.body, fetchReq.status, responseHeaders);
|
|
} catch (e: any) {
|
|
console.error("Error fetching federated link", e);
|
|
return c.text(e.message, 500);
|
|
}
|
|
},
|
|
);
|
|
}
|
|
|
|
private fileMetaToHeaders(fileMeta: FileMeta) {
|
|
return {
|
|
"Content-Type": fileMeta.contentType,
|
|
"X-Last-Modified": "" + fileMeta.lastModified,
|
|
"X-Created": "" + fileMeta.created,
|
|
"Cache-Control": "no-cache",
|
|
"X-Permission": fileMeta.perm,
|
|
"X-Content-Length": "" + fileMeta.size,
|
|
};
|
|
}
|
|
|
|
stop() {
|
|
if (this.abortController) {
|
|
this.abortController.abort();
|
|
console.log("stopped server");
|
|
}
|
|
}
|
|
}
|
|
|
|
function utcDateString(mtime: number): string {
|
|
return new Date(mtime).toUTCString();
|
|
}
|
|
|
|
function authCookieName(host: string) {
|
|
return `auth_${host.replaceAll(/\W/g, "_")}`;
|
|
}
|