Initial commit: Torrent search and download application

node_modules/puppeteer-core/src/bidi/BidiOverCdp.ts

@@ -0,0 +1,207 @@
+/**
+ * @license
+ * Copyright 2023 Google Inc.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import * as BidiMapper from 'chromium-bidi/lib/cjs/bidiMapper/BidiMapper.js';
+import type {ProtocolMapping} from 'devtools-protocol/types/protocol-mapping.js';
+
+import type {CDPEvents, CDPSession} from '../api/CDPSession.js';
+import type {Connection as CdpConnection} from '../cdp/Connection.js';
+import {debug} from '../common/Debug.js';
+import {TargetCloseError} from '../common/Errors.js';
+import type {Handler} from '../common/EventEmitter.js';
+
+import {BidiConnection} from './Connection.js';
+
+const bidiServerLogger = (prefix: string, ...args: unknown[]): void => {
+  debug(`bidi:${prefix}`)(args);
+};
+
+/**
+ * @internal
+ */
+export async function connectBidiOverCdp(
+  cdp: CdpConnection,
+): Promise<BidiConnection> {
+  const transportBiDi = new NoOpTransport();
+  const cdpConnectionAdapter = new CdpConnectionAdapter(cdp);
+  const pptrTransport = {
+    send(message: string): void {
+      // Forwards a BiDi command sent by Puppeteer to the input of the BidiServer.
+      transportBiDi.emitMessage(JSON.parse(message));
+    },
+    close(): void {
+      bidiServer.close();
+      cdpConnectionAdapter.close();
+      cdp.dispose();
+    },
+    onmessage(_message: string): void {
+      // The method is overridden by the Connection.
+    },
+  };
+  transportBiDi.on('bidiResponse', (message: object) => {
+    // Forwards a BiDi event sent by BidiServer to Puppeteer.
+    pptrTransport.onmessage(JSON.stringify(message));
+  });
+  const pptrBiDiConnection = new BidiConnection(
+    cdp.url(),
+    pptrTransport,
+    cdp.delay,
+    cdp.timeout,
+  );
+  const bidiServer = await BidiMapper.BidiServer.createAndStart(
+    transportBiDi,
+    cdpConnectionAdapter,
+    cdpConnectionAdapter.browserClient(),
+    /* selfTargetId= */ '',
+    undefined,
+    bidiServerLogger,
+  );
+  return pptrBiDiConnection;
+}
+
+/**
+ * Manages CDPSessions for BidiServer.
+ * @internal
+ */
+class CdpConnectionAdapter {
+  #cdp: CdpConnection;
+  #adapters = new Map<CDPSession, CDPClientAdapter<CDPSession>>();
+  #browserCdpConnection: CDPClientAdapter<CdpConnection>;
+
+  constructor(cdp: CdpConnection) {
+    this.#cdp = cdp;
+    this.#browserCdpConnection = new CDPClientAdapter(cdp);
+  }
+
+  browserClient(): CDPClientAdapter<CdpConnection> {
+    return this.#browserCdpConnection;
+  }
+
+  getCdpClient(id: string) {
+    const session = this.#cdp.session(id);
+    if (!session) {
+      throw new Error(`Unknown CDP session with id ${id}`);
+    }
+    if (!this.#adapters.has(session)) {
+      const adapter = new CDPClientAdapter(
+        session,
+        id,
+        this.#browserCdpConnection,
+      );
+      this.#adapters.set(session, adapter);
+      return adapter;
+    }
+    return this.#adapters.get(session)!;
+  }
+
+  close() {
+    this.#browserCdpConnection.close();
+    for (const adapter of this.#adapters.values()) {
+      adapter.close();
+    }
+  }
+}
+
+/**
+ * Wrapper on top of CDPSession/CDPConnection to satisfy CDP interface that
+ * BidiServer needs.
+ *
+ * @internal
+ */
+class CDPClientAdapter<T extends CDPSession | CdpConnection>
+  extends BidiMapper.EventEmitter<CDPEvents>
+  implements BidiMapper.CdpClient
+{
+  #closed = false;
+  #client: T;
+  sessionId: string | undefined = undefined;
+  #browserClient?: BidiMapper.CdpClient;
+
+  constructor(
+    client: T,
+    sessionId?: string,
+    browserClient?: BidiMapper.CdpClient,
+  ) {
+    super();
+    this.#client = client;
+    this.sessionId = sessionId;
+    this.#browserClient = browserClient;
+    this.#client.on('*', this.#forwardMessage as Handler<any>);
+  }
+
+  browserClient(): BidiMapper.CdpClient {
+    return this.#browserClient!;
+  }
+
+  #forwardMessage = <T extends keyof CDPEvents>(
+    method: T,
+    event: CDPEvents[T],
+  ) => {
+    this.emit(method, event);
+  };
+
+  async sendCommand<T extends keyof ProtocolMapping.Commands>(
+    method: T,
+    ...params: ProtocolMapping.Commands[T]['paramsType']
+  ): Promise<ProtocolMapping.Commands[T]['returnType']> {
+    if (this.#closed) {
+      return;
+    }
+    try {
+      return await this.#client.send(method, ...params);
+    } catch (err) {
+      if (this.#closed) {
+        return;
+      }
+      throw err;
+    }
+  }
+
+  close() {
+    this.#client.off('*', this.#forwardMessage as Handler<any>);
+    this.#closed = true;
+  }
+
+  isCloseError(error: unknown): boolean {
+    return error instanceof TargetCloseError;
+  }
+}
+
+/**
+ * This transport is given to the BiDi server instance and allows Puppeteer
+ * to send and receive commands to the BiDiServer.
+ * @internal
+ */
+class NoOpTransport
+  extends BidiMapper.EventEmitter<{
+    bidiResponse: any;
+  }>
+  implements BidiMapper.BidiTransport
+{
+  #onMessage: (message: any) => Promise<void> | void = async (
+    _m: any,
+  ): Promise<void> => {
+    return;
+  };
+
+  emitMessage(message: any) {
+    void this.#onMessage(message);
+  }
+
+  setOnMessage(onMessage: (message: any) => Promise<void> | void): void {
+    this.#onMessage = onMessage;
+  }
+
+  async sendMessage(message: any): Promise<void> {
+    this.emit('bidiResponse', message);
+  }
+
+  close() {
+    this.#onMessage = async (_m: any): Promise<void> => {
+      return;
+    };
+  }
+}