Update app.py

app.py

@@ -38,6 +38,27 @@ PROXY_LIST = [
 FAILED_LOG_PATH = "failed_downloads.txt"
 BLOCKED_SITES = ["bigw.com.au"]
 
+def random_headers(referer):
+    """Return a rotating User‑Agent + referer header dict."""
+    return {
+        "User-Agent": random.choice(USER_AGENTS),
+        "Referer": referer
+    }
+
+def try_download(url, headers, proxies):
+    """
+    Attempt a simple GET through a proxy dict {"http":..., "https":...}.
+    Returns the response if status_code==200, else None.
+    """
+    try:
+        resp = session.get(url, headers=headers, proxies=proxies, stream=True, timeout=8)
+        if resp.status_code == 200 and "image" in resp.headers.get("Content-Type", ""):
+            return resp
+    except Exception as e:
+        print(f"⚠️ Proxy download error ({proxies}): {e}")
+    return None
+
+
 session = requests.Session()
 # --- Utility Functions ---
 def process_url_images(data, fmt, w, h):