Resolves #15, addl unrelated changes

util.py

@@ -2,13 +2,20 @@
 
 import logging
 
-from fastapi import Response
+from fastapi import FastAPI, Response, HTTPException, Security
+from fastapi.security import APIKeyHeader, APIKeyQuery
+
+global api_key_query
+global api_key_header
 
 class Utilities:
-    def __init__(self):
+    def __init__(self, app: FastAPI, constants):
+        self.constants = constants
         self.blocked_response_status = 422
         self.blocked_response_content = None
-        pass
+               
+        self.api_key_query = APIKeyQuery(name=constants.API_KEY_NAME, auto_error=False)
+        self.api_key_header = APIKeyHeader(name=f"x-{constants.API_KEY_NAME}", auto_error=False)
 
     def get_blocked_response(self, path: str | None = None):
         logging.error("Rejected request: Blocked")
@@ -19,5 +26,22 @@ class Utilities:
         logging.error("Rejected request: No such endpoint")
         raise HTTPException(detail="Unknown endpoint", status_code=404)
 
+    def check_key(self, path: str, key: str):
+        """
+        Accepts path as an argument to allow fine tuning access for each API key, not currently in use.
+        """
 
+        print(f"Testing with path: {path}, key: {key}")
+
+        if not key or not key.startswith("Bearer "):
+            return False
+        
+        key = key.split("Bearer ", maxsplit=1)[1].strip()
+
+        if not key in self.constants.API_KEYS:
+            print("Auth failed.")
+            return False
+
+        print("Auth succeeded")
+        return True