vault backup: 2026-11-09 09:18:58

小鱼/闲鱼消息通知/cdp.js

@@ -0,0 +1,75 @@
+// Minimal Chrome DevTools Protocol client (Node 22 global WebSocket, no npm deps).
+const fs = require('fs');
+const path = require('path');
+
+class CDP {
+  constructor(wsUrl) {
+    this.wsUrl = wsUrl;
+    this.id = 0;
+    this.pending = new Map();
+    this.closed = false;
+  }
+
+  connect(timeoutMs = 10000) {
+    return new Promise((resolve, reject) => {
+      const ws = new WebSocket(this.wsUrl);
+      this.ws = ws;
+      const timer = setTimeout(() => { try { ws.close(); } catch {} reject(new Error('connect timeout')); }, timeoutMs);
+      ws.onopen = () => { clearTimeout(timer); resolve(this); };
+      ws.onerror = () => { clearTimeout(timer); reject(new Error('ws error')); };
+      ws.onclose = () => {
+        this.closed = true;
+        for (const [, p] of this.pending) p.rej(new Error('ws closed'));
+        this.pending.clear();
+      };
+      ws.onmessage = (ev) => {
+        let m;
+        try { m = JSON.parse(ev.data); } catch { return; }
+        if (m.id && this.pending.has(m.id)) {
+          const p = this.pending.get(m.id);
+          this.pending.delete(m.id);
+          if (m.error) p.rej(new Error(m.error.message || 'cdp error'));
+          else p.res(m.result);
+        }
+      };
+    });
+  }
+
+  send(method, params = {}, timeoutMs = 15000) {
+    if (this.closed) return Promise.reject(new Error('ws closed'));
+    const id = ++this.id;
+    return new Promise((res, rej) => {
+      this.pending.set(id, { res, rej });
+      this.ws.send(JSON.stringify({ id, method, params }));
+      setTimeout(() => {
+        if (this.pending.has(id)) { this.pending.delete(id); rej(new Error('cdp timeout: ' + method)); }
+      }, timeoutMs);
+    });
+  }
+
+  async eval(expression, timeoutMs = 15000) {
+    const r = await this.send('Runtime.evaluate', {
+      expression,
+      returnByValue: true,
+      awaitPromise: true,
+      userGesture: true
+    }, timeoutMs);
+    if (r.exceptionDetails) {
+      throw new Error(r.exceptionDetails.exception?.description || r.exceptionDetails.text || 'eval failed');
+    }
+    return r.result ? r.result.value : undefined;
+  }
+
+  close() { try { this.ws.close(); } catch {} this.closed = true; }
+}
+
+async function listPages(port, urlMatch) {
+  const res = await fetch(`http://127.0.0.1:${port}/json/list`, { signal: AbortSignal.timeout(5000) });
+  const all = await res.json();
+  return all.filter(t => t.type === 'page' && typeof t.url === 'string'
+    && t.url.includes(urlMatch) && !t.url.startsWith('devtools://'));
+}
+
+const EXPR = fs.readFileSync(path.join(__dirname, 'probe-expression.js'), 'utf8');
+
+module.exports = { CDP, listPages, EXPR };