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
|
/**
* Which browser this harness should drive.
*
* Upstream only ever drives a browser on localhost. This fork adds a remote
* target so pi can drive a shared Chrome on another host (see FORK.md).
*
* Resolution is pure — no I/O — so the status command can report the configured
* intent without touching the network, and the daemon can resolve the same way
* in its own process.
*/
/** Default remote CDP endpoint: castle's Chrome, exposed on the wire network. */
export const DEFAULT_REMOTE_CDP = "10.88.0.25:9223";
/** Values of BU_CDP_HTTP that mean "ignore the default, use this machine". */
const LOCAL_ALIASES = new Set(["local", "localhost", "off", "none", "0", "no"]);
/**
* Where a target came from. "env" is BU_CDP_HTTP, "stored" is /browser-target,
* "default" is this fork's built-in. Only "default" is allowed to fall back.
*/
export type CdpTargetSource = "env" | "stored" | "default";
export type CdpTarget =
| {
readonly kind: "remote";
readonly host: string;
readonly port: number;
readonly source: CdpTargetSource;
}
| { readonly kind: "local"; readonly source: Exclude<CdpTargetSource, "default"> }
| { readonly kind: "invalid"; readonly raw: string; readonly reason: string; readonly source: CdpTargetSource };
/**
* Precedence: BU_CDP_HTTP, then the /browser-target choice, then the built-in
* default.
*
* "host:port" -> that remote, and a failure to reach it is fatal
* local|off|… -> upstream behaviour, this machine's own browser
* neither set -> DEFAULT_REMOTE_CDP, falling back to local when unreachable
*
* The environment wins over the stored choice so that a one-off
* `BU_CDP_HTTP=… pi` is never silently overridden by a setting made days ago.
*
* The fallback asymmetry is deliberate. An explicit endpoint — from either
* source — is an instruction, so silently driving a different browser instead
* would be wrong: it would automate the operator's own signed-in Chrome rather
* than the shared one. The built-in default is only a preference, so a laptop
* away from the wire network still gets the local browser the extension was
* originally written for.
*
* `stored` is passed in rather than read here so this stays pure and
* synchronous: /browser-status can describe the target without I/O, and the
* daemon can resolve identically in its own process.
*/
export const resolveCdpTarget = (
env: NodeJS.ProcessEnv = process.env,
stored: string | null = null,
): CdpTarget => {
const fromEnv = env["BU_CDP_HTTP"]?.trim();
const fromStore = stored?.trim();
const raw = fromEnv !== undefined && fromEnv !== "" ? fromEnv : fromStore;
const source: CdpTargetSource = fromEnv !== undefined && fromEnv !== "" ? "env" : "stored";
if (raw === undefined || raw === "") {
const parsed = parseHostPort(DEFAULT_REMOTE_CDP);
// Unreachable in practice: the constant above is validated by its own test.
if (!parsed) return { kind: "local", source: "env" };
return { kind: "remote", host: parsed.host, port: parsed.port, source: "default" };
}
if (LOCAL_ALIASES.has(raw.toLowerCase())) return { kind: "local", source };
const parsed = parseHostPort(raw);
if (!parsed) {
return {
kind: "invalid",
raw,
source,
reason: `expected "host:port" or one of ${[...LOCAL_ALIASES].join(", ")}`,
};
}
return { kind: "remote", host: parsed.host, port: parsed.port, source };
};
/** The vocabulary /browser-target accepts, for help text and validation. */
export const localAliases = (): ReadonlyArray<string> => [...LOCAL_ALIASES];
/** True when `value` is something resolveCdpTarget can make sense of. */
export const isValidTargetValue = (value: string): boolean => {
const v = value.trim();
if (v === "") return false;
return LOCAL_ALIASES.has(v.toLowerCase()) || parseHostPort(v) !== null;
};
const parseHostPort = (value: string): { host: string; port: number } | null => {
const sep = value.lastIndexOf(":");
if (sep === -1) return null;
const host = value.slice(0, sep).trim();
const port = Number(value.slice(sep + 1).trim());
if (!host) return null;
if (!Number.isInteger(port) || port <= 0 || port >= 65536) return null;
return { host, port };
};
const sourceLabel = (source: CdpTargetSource): string =>
source === "env" ? "BU_CDP_HTTP" : source === "stored" ? "/browser-target" : "built-in default";
/** One-line description for /browser-status and error messages. */
export const describeCdpTarget = (target: CdpTarget): string => {
switch (target.kind) {
case "remote":
return `${target.host}:${target.port} (${sourceLabel(target.source)})`;
case "local":
return `this machine's own browser (${sourceLabel(target.source)})`;
case "invalid":
return `invalid target "${target.raw}" from ${sourceLabel(target.source)} — ${target.reason}`;
}
};
|
