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import { isRecord } from "../util/guards";
export type WireRequest = {
readonly type: "request";
readonly id: number;
readonly method: string;
readonly params?: Record<string, unknown>;
readonly sessionId?: string;
};
export type WireResponse = {
readonly type: "response";
readonly id: number;
readonly result?: unknown;
readonly error?: {
readonly code: number;
readonly message: string;
readonly data?: string;
};
};
export type WireEvent = {
readonly type: "event";
readonly method: string;
readonly params?: Record<string, unknown>;
readonly sessionId?: string;
};
export type WireControl = {
readonly type: "control";
readonly action: "register" | "registered" | "deregister" | "shutdown";
readonly clientId?: string;
readonly reason?: string;
};
export type WireMessage = WireRequest | WireResponse | WireEvent | WireControl;
export const isWireMessage = (v: unknown): v is WireMessage => {
if (!isRecord(v)) return false;
const t = v["type"];
if (typeof t !== "string") return false;
switch (t) {
case "request": {
if (typeof v["id"] !== "number") return false;
if (typeof v["method"] !== "string") return false;
const sid = v["sessionId"];
if (sid !== undefined && typeof sid !== "string") return false;
return true;
}
case "response": {
if (typeof v["id"] !== "number") return false;
const errVal = v["error"];
if (errVal !== undefined) {
if (!isRecord(errVal)) return false;
if (typeof errVal["message"] !== "string") return false;
if (typeof errVal["code"] !== "number") return false;
}
return true;
}
case "event": {
if (typeof v["method"] !== "string") return false;
const sid = v["sessionId"];
if (sid !== undefined && typeof sid !== "string") return false;
return true;
}
case "control": {
const action = v["action"];
if (typeof action !== "string") return false;
if (!["register", "registered", "deregister", "shutdown"].includes(action)) return false;
const cid = v["clientId"];
if (
(action === "register" || action === "registered" || action === "deregister") &&
typeof cid !== "string"
) {
return false;
}
return true;
}
default:
return false;
}
};
export const serialize = (msg: WireMessage): string => JSON.stringify(msg);
export const deserialize = (line: string): WireMessage | null => {
let parsed: unknown;
try {
parsed = JSON.parse(line);
} catch {
return null;
}
if (!isWireMessage(parsed)) return null;
return parsed;
};
// Windows requires a named pipe (`\\.\pipe\<name>`); a Unix path is not a valid `net` listen/connect target there.
export const DAEMON_SOCKET_PATH =
process.platform === "win32"
? "\\\\.\\pipe\\pi-browser-daemon"
: "/tmp/pi-browser-daemon.sock";
export const DAEMON_IDLE_TIMEOUT_MS = 30 * 60 * 1000;
export const DAEMON_MAX_CLIENTS = 16;
export const DAEMON_STALE_SOCKET_CLEANUP = true;
export const CDP_CONNECT_TIMEOUT_MS = 10_000;
export const CDP_COMMAND_TIMEOUT_MS = 10_000;
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