Update app.py

app.py

@@ -138,6 +138,10 @@ def send_message(recipient_id, message_text):
     print(f"Message send response: {response.status_code}, {response.text}")
 
 def send_image(recipient_id, image_url):
+    if not verify_image_url(image_url):
+        print("Invalid or inaccessible image URL.")
+        return
+
     url = f'https://graph.facebook.com/v12.0/me/messages?access_token={PAGE_ACCESS_TOKEN}'
     headers = {'Content-Type': 'application/json'}
     payload = {
@@ -156,6 +160,17 @@ def send_image(recipient_id, image_url):
     response = requests.post(url, headers=headers, json=payload)
     print(f"Image send response: {response.status_code}, {response.text}")
 
+    if response.status_code != 200:
+        print(f"Error sending image: {response.json()}")
+
+def verify_image_url(image_url):
+    try:
+        response = requests.head(image_url)
+        return response.status_code == 200 and 'image' in response.headers['Content-Type']
+    except Exception as e:
+        print(f"Error verifying image URL: {e}")
+        return False
+
 def set_typing_on(recipient_id):
     url = f'https://graph.facebook.com/v12.0/me/messages?access_token={PAGE_ACCESS_TOKEN}'
     headers = {'Content-Type': 'application/json'}