shared use machine short-cookie timeout implemented for survex file editing only

core/utils.py

@@ -48,6 +48,8 @@ alphabet = []
 sha = hashlib.new('sha256')
 COOKIE_MAX_AGE = 2*365*24*60*60 # seconds
 COOKIE_SHORT_TIMEOUT = 60*60 # seconds
+PUBLIC_LAPTOP_COOKIE_NAME = "public_laptop"
+PUBLIC_LAPTOP_COOKIE_TEXT = "this is a public laptop"
 throw = 35.0
 
 EXPOSERVER = "expo" # hostname of the server at expo.survex.com
@@ -78,11 +80,11 @@ except:
     # Opening of file for writing is going to fail currently, so decide it doesn't matter for now
     pass
 
-def get_cookie_max_age():
+def get_cookie_max_age(request=None):
     """This is where we detect whether the machine the user is using is a shared-use device or a personal device.
     If it is shared-use, then we set a much shorter cookie timout period.
     """
-    if shared_use_machine():
+    if shared_use_machine(request):
         return COOKIE_SHORT_TIMEOUT
     else:        
         return COOKIE_MAX_AGE
@@ -309,10 +311,25 @@ def get_git_string(user):
         person = people[0]
         return f"{person.fullname} <{user.email}>"    
 
-def shared_use_machine():
+def shared_use_machine(request):
     """Looks for a cookie which only exists on shared use machines
     """
-    return False
+    print(f" -  shared use cookie check {request}")
+    
+    if not request: # temporary while rolling out implementation to all calling functions
+        return False      
+
+    if not (cookie_txt := request.COOKIES.get(PUBLIC_LAPTOP_COOKIE_NAME, "")):
+        return False
+    elif cookie_txt == PUBLIC_LAPTOP_COOKIE_TEXT:        
+        print(f" -  shared use cookie exists, and has expected value: '{cookie_txt}'")
+        return True
+    else:
+        print(f" -  shared use cookie exists, but has wrong value: '{cookie_txt}' not '{PUBLIC_LAPTOP_COOKIE_TEXT}'")
+        return True
+
+
+
     
 def get_cookie(request):
     """The initial idea of having a default turned out to be a bad idea as people just ignore the field.