Fix some directory traversal and smooth out behavior if file is not found

cogs/gpt_3_commands_and_converser.py

@@ -1267,16 +1267,6 @@ class GPT3ComCon(discord.Cog, name="GPT3ComCon"):
 
         self.conversation_threads[thread.id] = Thread(thread.id)
 
-        # Append the starter text for gpt3 to the user's history so it gets concatenated with the prompt later
-        if minimal or opener_file:
-            self.conversation_threads[thread.id].history.append(
-                self.CONVERSATION_STARTER_TEXT_MINIMAL
-            )
-        elif not minimal:
-            self.conversation_threads[thread.id].history.append(
-                self.CONVERSATION_STARTER_TEXT
-            )
-
         if not opener and not opener_file:
             user_id_normalized = user.id
         else:
@@ -1284,14 +1274,18 @@ class GPT3ComCon(discord.Cog, name="GPT3ComCon"):
             if not opener_file:
                 pass
             else: 
-                if opener_file.endswith((".txt", ".json")):
+                if not opener_file.endswith((".txt", ".json")):
+                    opener_file = None
+                else:
                     # Load the file and read it into opener
+                    try:
+                        opener_file = re.sub(".+(?=[\\//])", "", opener_file) # remove paths from the opener file
                         opener_file = EnvService.find_shared_file(
                             f"openers{separator}{opener_file}"
                         )
                         opener_file = await self.load_file(opener_file, ctx)
-                    try:
-                        opener_file = json.loads(opener_file) # Try opening as json, if it fails it'll do it as a str
+                        try: # Try opening as json, if it fails it'll do it as a str
+                            opener_file = json.loads(opener_file)
                             temperature=None if not opener_file["temperature"] else opener_file["temperature"]
                             top_p=None if not opener_file["top_p"] else opener_file["top_p"]
                             frequency_penalty=None if not opener_file["frequency_penalty"] else opener_file["frequency_penalty"]
@@ -1301,11 +1295,24 @@ class GPT3ComCon(discord.Cog, name="GPT3ComCon"):
                                 opener = opener_file["text"]
                             else:
                                 opener = opener_file["text"] + opener
-                    except:
-                        if not opener:  # if we only use opener_file then only pass on opener_file for the opening prompt
+                        except: # Parse as just regular text
+                            if not opener: 
                                 opener = opener_file
                             else:
                                 opener = opener_file + opener   
+                    except:
+                        opener_file = None
+                
+
+        # Append the starter text for gpt3 to the user's history so it gets concatenated with the prompt later
+        if minimal or opener_file:
+            self.conversation_threads[thread.id].history.append(
+                self.CONVERSATION_STARTER_TEXT_MINIMAL
+            )
+        elif not minimal:
+            self.conversation_threads[thread.id].history.append(
+                self.CONVERSATION_STARTER_TEXT
+            )
 
         # Set user as owner before sending anything that can error and leave the thread unowned
         self.conversation_thread_owners[user_id_normalized] = thread.id