| 64 | } |
| 65 | |
| 66 | class CdpPage { |
| 67 | private nextId = 1; |
| 68 | private readonly pending = new Map< |
| 69 | number, |
| 70 | { |
| 71 | readonly resolve: (value: unknown) => void; |
| 72 | readonly reject: (error: Error) => void; |
| 73 | } |
| 74 | >(); |
| 75 | |
| 76 | private constructor(private readonly socket: WebSocket) { |
| 77 | socket.addEventListener("message", (event) => { |
| 78 | const data = event.data; |
| 79 | if (typeof data !== "string") return; |
| 80 | const message = JSON.parse(data) as CdpResponse<unknown>; |
| 81 | if (!message.id) return; |
| 82 | const pending = this.pending.get(message.id); |
| 83 | if (!pending) return; |
| 84 | this.pending.delete(message.id); |
| 85 | if (message.error) { |
| 86 | pending.reject(new Error(message.error.message ?? "CDP command failed")); |
| 87 | return; |
| 88 | } |
| 89 | pending.resolve(message.result); |
| 90 | }); |
| 91 | socket.addEventListener("close", () => { |
| 92 | for (const [, pending] of this.pending) { |
| 93 | pending.reject(new Error("CDP socket closed")); |
| 94 | } |
| 95 | this.pending.clear(); |
| 96 | }); |
| 97 | } |
| 98 | |
| 99 | static connect = (url: string): Promise<CdpPage> => |
| 100 | new Promise((resolve, reject) => { |
| 101 | const socket = new WebSocket(url); |
| 102 | const timer = setTimeout(() => { |
| 103 | socket.close(); |
| 104 | // oxlint-disable-next-line executor/no-promise-reject, executor/no-error-constructor -- boundary: WebSocket connection promise adapter |
| 105 | reject(new Error(`Timed out connecting to page CDP target ${url}`)); |
| 106 | }, 30_000); |
| 107 | socket.addEventListener( |
| 108 | "open", |
| 109 | () => { |
| 110 | clearTimeout(timer); |
| 111 | resolve(new CdpPage(socket)); |
| 112 | }, |
| 113 | { once: true }, |
| 114 | ); |
| 115 | socket.addEventListener( |
| 116 | "error", |
| 117 | () => { |
| 118 | clearTimeout(timer); |
| 119 | // oxlint-disable-next-line executor/no-promise-reject, executor/no-error-constructor -- boundary: WebSocket connection promise adapter |
| 120 | reject(new Error(`Failed to connect to page CDP target ${url}`)); |
| 121 | }, |
| 122 | { once: true }, |
| 123 | ); |