109 lines
2.8 KiB
TypeScript
109 lines
2.8 KiB
TypeScript
import * as crypto from "crypto";
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import * as net from "net";
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import { VSBuffer } from "vs/base/common/buffer";
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import { NodeSocket, WebSocketNodeSocket } from "vs/base/parts/ipc/node/ipc.net";
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import { PersistentProtocol } from "vs/base/parts/ipc/common/ipc.net";
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import { AuthRequest, ConnectionTypeRequest, HandshakeMessage } from "vs/platform/remote/common/remoteAgentConnection";
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export interface SocketOptions {
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readonly reconnectionToken: string;
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readonly reconnection: boolean;
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readonly skipWebSocketFrames: boolean;
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}
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export class Protocol extends PersistentProtocol {
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private disposed: boolean = false;
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public constructor(
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secWebsocketKey: string,
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socket: net.Socket,
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public readonly options: SocketOptions,
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) {
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super(
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options.skipWebSocketFrames
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? new NodeSocket(socket)
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: new WebSocketNodeSocket(new NodeSocket(socket)),
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);
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socket.on("error", () => this.dispose());
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socket.on("end", () => this.dispose());
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// This magic value is specified by the websocket spec.
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const magic = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
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const reply = crypto.createHash("sha1")
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.update(secWebsocketKey + magic)
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.digest("base64");
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socket.write([
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"HTTP/1.1 101 Switching Protocols",
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"Upgrade: websocket",
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"Connection: Upgrade",
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`Sec-WebSocket-Accept: ${reply}`,
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].join("\r\n") + "\r\n\r\n");
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}
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public sendDisconnect(): void {
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if (!this.disposed) {
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super.sendDisconnect();
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}
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}
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public dispose(error?: Error): void {
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if (!this.disposed) {
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this.disposed = true;
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if (error) {
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this.sendMessage({ type: "error", reason: error.message });
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}
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super.dispose();
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this.getSocket().dispose();
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}
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}
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/**
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* Perform a handshake to get a connection request.
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*/
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public handshake(): Promise<ConnectionTypeRequest> {
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return new Promise((resolve, reject) => {
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const handler = this.onControlMessage((rawMessage) => {
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try {
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const message = JSON.parse(rawMessage.toString());
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switch (message.type) {
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case "auth": return this.authenticate(message);
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case "connectionType":
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handler.dispose();
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return resolve(message);
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default: throw new Error("Unrecognized message type");
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}
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} catch (error) {
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handler.dispose();
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reject(error);
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}
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});
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});
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}
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/**
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* TODO: This ignores the authentication process entirely for now.
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*/
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private authenticate(_message: AuthRequest): void {
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this.sendMessage({
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type: "sign",
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data: "",
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});
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}
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/**
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* TODO: implement.
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*/
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public tunnel(): void {
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throw new Error("Tunnel is not implemented yet");
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}
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/**
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* Send a handshake message. In the case of the extension host, it just sends
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* back a debug port.
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*/
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public sendMessage(message: HandshakeMessage | { debugPort?: number } ): void {
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this.sendControl(VSBuffer.fromString(JSON.stringify(message)));
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}
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}
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