05/24 Enhance functionalities

routes/user_dashboard.py

@@ -3,10 +3,13 @@ routes/user_dashboard.py — Regular user: shift check dashboard.
 """
 
 import logging
+import time
+import requests as _http_req
 from flask import Blueprint, render_template, request, redirect, url_for, flash, session, jsonify
 from models import (
     get_today_checks, mark_website_checked, unmark_website_checked,
     update_check_note, get_user_active_shifts, get_website_credentials,
+    get_website_url,
 )
 from utils.decorators import login_required
 
@@ -91,3 +94,23 @@ def view_credentials(website_id):
     except Exception as e:
         logger.error(f"view_credentials error: {e}")
         return jsonify({"error": str(e)}), 500
+
+
+@user_dashboard_bp.route("/health/<int:website_id>")
+@login_required
+def health_check(website_id):
+    """Server-side HEAD probe for a website's reachability."""
+    url = get_website_url(website_id)
+    if not url:
+        return jsonify({"status": "not_found"}), 404
+    try:
+        t0   = time.time()
+        resp = _http_req.head(url, timeout=6, allow_redirects=True,
+                              headers={"User-Agent": "WebsiteChecker/1.0 (health-check)"})
+        ms   = int((time.time() - t0) * 1000)
+        ok   = resp.status_code < 400
+        return jsonify({"status": "ok" if ok else "error", "ms": ms})
+    except _http_req.exceptions.Timeout:
+        return jsonify({"status": "timeout", "ms": 6000})
+    except Exception:
+        return jsonify({"status": "unreachable", "ms": None})