1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
|
/**
* Protocol types and low-level socket communication for the browser-harness daemon.
*
* The daemon exposes a Unix socket at /tmp/bu-<NAME>.sock.
* Protocol: one JSON-line request → one JSON-line response per connection.
*/
import { createConnection } from "node:net";
// ── Request ──────────────────────────────────────────────────────────────────
export interface DaemonRequest {
/** CDP method (e.g. "Page.navigate") — absent for meta requests */
method?: string;
/** CDP parameters */
params?: Record<string, unknown>;
/** CDP session ID — null/absent for browser-level (Target.*) calls */
session_id?: string | null;
/** Meta command: "drain_events" | "set_session" | "pending_dialog" | "shutdown" */
meta?: string;
}
// ── Response ─────────────────────────────────────────────────────────────────
export interface DaemonResponse {
result?: unknown;
error?: string;
events?: CDPEvent[];
session_id?: string;
dialog?: DialogInfo;
ok?: boolean;
}
// ── CDP Event ────────────────────────────────────────────────────────────────
export interface CDPEvent {
method: string;
params: unknown;
session_id?: string;
}
// ── Dialog ───────────────────────────────────────────────────────────────────
export interface DialogInfo {
type: "alert" | "confirm" | "prompt" | "beforeunload";
message: string;
defaultPrompt?: string;
}
// ── Tab ──────────────────────────────────────────────────────────────────────
export interface TabInfo {
targetId: string;
title: string;
url: string;
}
// ── Page State ───────────────────────────────────────────────────────────────
export interface PageInfo {
url: string;
title: string;
width: number;
height: number;
scrollX: number;
scrollY: number;
pageWidth: number;
pageHeight: number;
}
export type PageInfoResult = PageInfo | { dialog: DialogInfo };
// ── Daemon Status ────────────────────────────────────────────────────────────
export interface DaemonStatus {
alive: boolean;
sessionId: string | null;
pid: number | null;
namespace: string;
socketPath: string;
remoteBrowserId?: string;
}
// ── Remote Config ────────────────────────────────────────────────────────────
export interface RemoteConfig {
cdpUrl: string;
browserId: string;
}
// ── Internal URL prefixes to filter ──────────────────────────────────────────
const INTERNAL_PREFIXES = [
"chrome://",
"chrome-untrusted://",
"devtools://",
"chrome-extension://",
"about:",
];
export function isInternalUrl(url: string): boolean {
return INTERNAL_PREFIXES.some((p) => url.startsWith(p));
}
// ── Low-level socket send ────────────────────────────────────────────────────
/**
* Send a single JSON-line request to the daemon socket and read one JSON-line response.
* Opens a fresh connection per request (stateless, matches helpers.py _send pattern).
*/
export function sendRequest(
socketPath: string,
request: DaemonRequest,
timeoutMs = 15_000,
): Promise<DaemonResponse> {
return new Promise((resolve, reject) => {
const socket = createConnection(socketPath);
const timer = setTimeout(() => {
socket.destroy();
reject(new Error(`Daemon request timed out after ${timeoutMs}ms: ${JSON.stringify(request.method ?? request.meta)}`));
}, timeoutMs);
let buffer = "";
socket.on("connect", () => {
socket.write(JSON.stringify(request) + "\n");
});
socket.on("data", (chunk: Buffer) => {
buffer += chunk.toString();
// Response is one JSON line ending with \n
if (buffer.includes("\n")) {
clearTimeout(timer);
const line = buffer.split("\n")[0];
try {
const response: DaemonResponse = JSON.parse(line);
socket.end();
resolve(response);
} catch (e) {
socket.end();
reject(new Error(`Failed to parse daemon response: ${line.slice(0, 200)}`));
}
}
});
socket.on("error", (err: NodeJS.ErrnoException) => {
clearTimeout(timer);
socket.destroy();
reject(new Error(`Daemon socket error (${socketPath}): ${err.message}`));
});
socket.on("close", () => {
clearTimeout(timer);
if (buffer.length === 0) {
reject(new Error(`Daemon socket closed without response (${socketPath})`));
}
});
});
}
/**
* Quick check if the daemon socket accepts connections.
*/
export function daemonAlive(socketPath: string, timeoutMs = 1000): Promise<boolean> {
return new Promise((resolve) => {
const socket = createConnection(socketPath);
const timer = setTimeout(() => {
socket.destroy();
resolve(false);
}, timeoutMs);
socket.on("connect", () => {
clearTimeout(timer);
socket.end();
resolve(true);
});
socket.on("error", () => {
clearTimeout(timer);
resolve(false);
});
});
}
/**
* True health check: send Target.getTargets and verify "result" key in response.
* A stale daemon can accept socket connections but have a dead CDP websocket.
*/
export async function healthProbe(socketPath: string): Promise<boolean> {
try {
const response = await sendRequest(
socketPath,
{ method: "Target.getTargets", params: {} },
3000,
);
return "result" in response && response.result !== undefined;
} catch {
return false;
}
}
|
