feat: add exec host routing + node daemon
This commit is contained in:
Peter Steinberger
306
src/node-host/bridge-client.ts
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306
src/node-host/bridge-client.ts
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@@ -0,0 +1,306 @@
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import crypto from "node:crypto";
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import net from "node:net";
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import tls from "node:tls";
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import type {
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BridgeErrorFrame,
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BridgeEventFrame,
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BridgeHelloFrame,
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BridgeHelloOkFrame,
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BridgeInvokeRequestFrame,
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BridgeInvokeResponseFrame,
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BridgePairOkFrame,
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BridgePairRequestFrame,
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BridgePingFrame,
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BridgePongFrame,
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BridgeRPCRequestFrame,
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BridgeRPCResponseFrame,
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} from "../infra/bridge/server/types.js";
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export type BridgeClientOptions = {
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host: string;
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port: number;
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tls?: boolean;
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tlsFingerprint?: string;
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nodeId: string;
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token?: string;
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displayName?: string;
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platform?: string;
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version?: string;
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deviceFamily?: string;
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modelIdentifier?: string;
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caps?: string[];
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commands?: string[];
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permissions?: Record<string, boolean>;
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onInvoke?: (frame: BridgeInvokeRequestFrame) => void | Promise<void>;
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onEvent?: (frame: BridgeEventFrame) => void | Promise<void>;
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onPairToken?: (token: string) => void | Promise<void>;
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onAuthReset?: () => void | Promise<void>;
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onConnected?: (hello: BridgeHelloOkFrame) => void | Promise<void>;
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onDisconnected?: (err?: Error) => void | Promise<void>;
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log?: { info?: (msg: string) => void; warn?: (msg: string) => void };
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};
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type PendingRpc = {
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resolve: (frame: BridgeRPCResponseFrame) => void;
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reject: (err: Error) => void;
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timer?: NodeJS.Timeout;
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};
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function normalizeFingerprint(input: string): string {
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return input.replace(/[^a-fA-F0-9]/g, "").toLowerCase();
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}
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function extractFingerprint(raw: tls.PeerCertificate | tls.DetailedPeerCertificate): string | null {
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const value = "fingerprint256" in raw ? raw.fingerprint256 : undefined;
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if (!value) return null;
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return normalizeFingerprint(value);
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}
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export class BridgeClient {
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private opts: BridgeClientOptions;
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private socket: net.Socket | tls.TLSSocket | null = null;
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private buffer = "";
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private pendingRpc = new Map<string, PendingRpc>();
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private connected = false;
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private helloReady: Promise<void> | null = null;
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private helloResolve: (() => void) | null = null;
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private helloReject: ((err: Error) => void) | null = null;
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constructor(opts: BridgeClientOptions) {
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this.opts = opts;
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}
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async connect(): Promise<void> {
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if (this.connected) return;
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this.helloReady = new Promise<void>((resolve, reject) => {
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this.helloResolve = resolve;
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this.helloReject = reject;
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});
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const socket = this.opts.tls
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? tls.connect({
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host: this.opts.host,
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port: this.opts.port,
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rejectUnauthorized: false,
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})
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: net.connect({ host: this.opts.host, port: this.opts.port });
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this.socket = socket;
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socket.setNoDelay(true);
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socket.on("connect", () => {
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this.sendHello();
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});
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socket.on("error", (err) => {
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this.handleDisconnect(err);
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});
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socket.on("close", () => {
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this.handleDisconnect();
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});
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socket.on("data", (chunk) => {
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this.buffer += chunk.toString("utf8");
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this.flush();
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});
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if (this.opts.tls && socket instanceof tls.TLSSocket && this.opts.tlsFingerprint) {
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socket.once("secureConnect", () => {
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const cert = socket.getPeerCertificate(true);
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const fingerprint = cert ? extractFingerprint(cert) : null;
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if (!fingerprint || fingerprint !== normalizeFingerprint(this.opts.tlsFingerprint ?? "")) {
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const err = new Error("bridge tls fingerprint mismatch");
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this.handleDisconnect(err);
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socket.destroy(err);
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}
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});
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}
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await this.helloReady;
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}
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async close(): Promise<void> {
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if (this.socket) {
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this.socket.destroy();
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this.socket = null;
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}
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this.connected = false;
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this.pendingRpc.forEach((pending) => {
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pending.timer && clearTimeout(pending.timer);
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pending.reject(new Error("bridge client closed"));
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});
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this.pendingRpc.clear();
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}
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async request(method: string, params: Record<string, unknown> | null = null, timeoutMs = 5000) {
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const id = crypto.randomUUID();
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const frame: BridgeRPCRequestFrame = {
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type: "req",
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id,
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method,
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paramsJSON: params ? JSON.stringify(params) : null,
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};
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const res = await new Promise<BridgeRPCResponseFrame>((resolve, reject) => {
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const timer = setTimeout(() => {
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this.pendingRpc.delete(id);
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reject(new Error(`bridge request timeout (${method})`));
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}, timeoutMs);
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this.pendingRpc.set(id, { resolve, reject, timer });
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this.send(frame);
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});
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if (!res.ok) {
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throw new Error(res.error?.message ?? "bridge request failed");
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}
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return res.payloadJSON ? JSON.parse(res.payloadJSON) : null;
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}
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sendEvent(event: string, payload?: unknown) {
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const frame: BridgeEventFrame = {
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type: "event",
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event,
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payloadJSON: payload ? JSON.stringify(payload) : null,
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};
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this.send(frame);
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}
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sendInvokeResponse(frame: BridgeInvokeResponseFrame) {
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this.send(frame);
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}
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private sendHello() {
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const hello: BridgeHelloFrame = {
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type: "hello",
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nodeId: this.opts.nodeId,
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token: this.opts.token,
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displayName: this.opts.displayName,
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platform: this.opts.platform,
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version: this.opts.version,
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deviceFamily: this.opts.deviceFamily,
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modelIdentifier: this.opts.modelIdentifier,
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caps: this.opts.caps,
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commands: this.opts.commands,
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permissions: this.opts.permissions,
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};
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this.send(hello);
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}
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private sendPairRequest() {
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const req: BridgePairRequestFrame = {
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type: "pair-request",
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nodeId: this.opts.nodeId,
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displayName: this.opts.displayName,
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platform: this.opts.platform,
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version: this.opts.version,
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deviceFamily: this.opts.deviceFamily,
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modelIdentifier: this.opts.modelIdentifier,
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caps: this.opts.caps,
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commands: this.opts.commands,
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permissions: this.opts.permissions,
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};
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this.send(req);
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}
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private send(frame: object) {
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if (!this.socket) return;
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this.socket.write(`${JSON.stringify(frame)}\n`);
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}
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private handleDisconnect(err?: Error) {
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if (!this.connected && this.helloReject) {
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this.helloReject(err ?? new Error("bridge connection failed"));
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this.helloResolve = null;
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this.helloReject = null;
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}
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if (!this.connected && !this.socket) return;
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this.connected = false;
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this.socket = null;
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this.pendingRpc.forEach((pending) => {
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pending.timer && clearTimeout(pending.timer);
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pending.reject(err ?? new Error("bridge connection closed"));
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});
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this.pendingRpc.clear();
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void this.opts.onDisconnected?.(err);
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}
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private flush() {
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while (true) {
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const idx = this.buffer.indexOf("\n");
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if (idx === -1) break;
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const line = this.buffer.slice(0, idx).trim();
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this.buffer = this.buffer.slice(idx + 1);
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if (!line) continue;
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let frame: { type?: string; [key: string]: unknown };
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try {
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frame = JSON.parse(line) as { type?: string };
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} catch {
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continue;
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}
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this.handleFrame(frame as BridgeErrorFrame);
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}
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}
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private handleFrame(frame: {
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type?: string;
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[key: string]: unknown;
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}) {
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const type = String(frame.type ?? "");
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switch (type) {
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case "hello-ok": {
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this.connected = true;
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this.helloResolve?.();
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this.helloResolve = null;
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this.helloReject = null;
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void this.opts.onConnected?.(frame as BridgeHelloOkFrame);
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return;
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}
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case "pair-ok": {
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const token = String((frame as BridgePairOkFrame).token ?? "").trim();
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if (token) {
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this.opts.token = token;
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void this.opts.onPairToken?.(token);
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}
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return;
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}
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case "error": {
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const code = String((frame as BridgeErrorFrame).code ?? "");
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if (code === "NOT_PAIRED" || code === "UNAUTHORIZED") {
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this.opts.token = undefined;
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void this.opts.onAuthReset?.();
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this.sendPairRequest();
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return;
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}
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this.handleDisconnect(new Error((frame as BridgeErrorFrame).message ?? "bridge error"));
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return;
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}
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case "pong":
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return;
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case "ping": {
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const ping = frame as BridgePingFrame;
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const pong: BridgePongFrame = { type: "pong", id: String(ping.id ?? "") };
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this.send(pong);
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return;
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}
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case "event": {
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void this.opts.onEvent?.(frame as BridgeEventFrame);
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return;
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}
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case "res": {
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const res = frame as BridgeRPCResponseFrame;
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const pending = this.pendingRpc.get(res.id);
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if (pending) {
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pending.timer && clearTimeout(pending.timer);
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this.pendingRpc.delete(res.id);
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pending.resolve(res);
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}
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return;
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}
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case "invoke": {
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void this.opts.onInvoke?.(frame as BridgeInvokeRequestFrame);
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return;
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}
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case "invoke-res": {
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return;
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}
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default:
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return;
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}
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}
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}
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