Initial import: clean snapshot from /home/olafn/infoscreen-dev (2025-10-25)

scripts/test_cdp.py

@@ -0,0 +1,75 @@
+#!/usr/bin/env python3
+"""Quick CDP tester: lists targets and evaluates a small script in the first target.
+
+Usage:
+  python3 scripts/test_cdp.py
+
+Requires: requests, websocket-client
+"""
+import requests
+import websocket
+import json
+
+
+def main():
+    try:
+        resp = requests.get('http://127.0.0.1:9222/json', timeout=3)
+        tabs = resp.json()
+    except Exception as e:
+        print('ERROR: could not fetch http://127.0.0.1:9222/json ->', e)
+        return
+
+    if not tabs:
+        print('No targets returned')
+        return
+
+    print('Found targets:')
+    for i, t in enumerate(tabs):
+        print(i, t.get('type'), t.get('url'), '-', t.get('title'))
+
+    target = tabs[0]
+    ws_url = target.get('webSocketDebuggerUrl')
+    print('\nUsing target[0]:', target.get('url'))
+    print('webSocketDebuggerUrl:', ws_url)
+
+    if not ws_url:
+        print('No webSocketDebuggerUrl for target')
+        return
+
+    try:
+        # Some Chromium builds require an Origin header to avoid 403 during the websocket handshake
+        try:
+            ws = websocket.create_connection(ws_url, timeout=5, header=["Origin: http://127.0.0.1"])
+        except TypeError:
+            # older websocket-client accepts origin kw instead
+            ws = websocket.create_connection(ws_url, timeout=5, origin="http://127.0.0.1")
+    except Exception as e:
+        print('ERROR: could not open websocket to', ws_url, '->', e)
+        return
+
+    idn = 1
+    # Enable runtime
+    msg = {'id': idn, 'method': 'Runtime.enable'}
+    ws.send(json.dumps(msg))
+    idn += 1
+    try:
+        print('Runtime.enable =>', ws.recv())
+    except Exception as e:
+        print('No response to Runtime.enable:', e)
+
+    # Evaluate a script that logs and returns a value
+    script = "console.log('cdp-test-log'); 12345"
+    msg = {'id': idn, 'method': 'Runtime.evaluate', 'params': {'expression': script, 'returnByValue': True}}
+    ws.send(json.dumps(msg))
+    idn += 1
+    try:
+        resp = ws.recv()
+        print('Runtime.evaluate =>', resp)
+    except Exception as e:
+        print('No response to Runtime.evaluate:', e)
+
+    ws.close()
+
+
+if __name__ == '__main__':
+    main()