62 lines
1.8 KiB
JavaScript
62 lines
1.8 KiB
JavaScript
/**
|
||
* 通过 CDP 读取运行中的 Electron 页面：文本、节点数量与控制台错误。
|
||
* 用法：node scripts/cdp-probe.mjs [expression]
|
||
*/
|
||
const endpoint = process.env.CDP_ENDPOINT || "http://127.0.0.1:9223";
|
||
const targets = await (await fetch(`${endpoint}/json/list`)).json();
|
||
const page = targets.find((item) => item.type === "page");
|
||
if (!page) throw new Error("no page target");
|
||
|
||
const ws = new WebSocket(page.webSocketDebuggerUrl);
|
||
const pending = new Map();
|
||
const events = [];
|
||
let seq = 0;
|
||
|
||
function send(method, params = {}) {
|
||
return new Promise((resolve, reject) => {
|
||
const id = ++seq;
|
||
pending.set(id, { resolve, reject });
|
||
ws.send(JSON.stringify({ id, method, params }));
|
||
});
|
||
}
|
||
|
||
await new Promise((resolve, reject) => {
|
||
ws.onopen = resolve;
|
||
ws.onerror = reject;
|
||
});
|
||
|
||
ws.onmessage = (event) => {
|
||
const message = JSON.parse(event.data);
|
||
if (message.id && pending.has(message.id)) {
|
||
const { resolve, reject } = pending.get(message.id);
|
||
pending.delete(message.id);
|
||
if (message.error) reject(new Error(JSON.stringify(message.error)));
|
||
else resolve(message.result);
|
||
} else {
|
||
events.push(message);
|
||
}
|
||
};
|
||
|
||
await send("Runtime.enable");
|
||
await send("Log.enable");
|
||
|
||
const expression = process.argv[2] || "document.body.innerText.slice(0, 6000)";
|
||
const result = await send("Runtime.evaluate", {
|
||
expression,
|
||
returnByValue: true,
|
||
awaitPromise: true
|
||
});
|
||
|
||
console.log("=== result ===");
|
||
console.log(JSON.stringify(result.result?.value ?? result, null, 2));
|
||
|
||
const errors = events.filter(
|
||
(item) =>
|
||
item.method === "Runtime.exceptionThrown" ||
|
||
(item.method === "Log.entryAdded" && ["error", "warning"].includes(item.params?.entry?.level))
|
||
);
|
||
console.log("\n=== errors/warnings ===");
|
||
console.log(JSON.stringify(errors.map((item) => item.params), null, 2).slice(0, 6000));
|
||
|
||
ws.close();
|