Add hint for LD_PRELOAD

sujet_tp.typ

@@ -55,9 +55,12 @@ from string import ascii_lowercase, ascii_uppercase, digits
 from subprocess import check_output
 
 alphabet = ascii_lowercase + ascii_uppercase + digits
+env = {
+    "LD_PRELOAD": "..." # TODO
+}
 
-def request(url: str) -> str:
+def request(url: str) -> int:
     """Executes the client binary with the following URL, and checks its output."""
-    # TODO: extraire l'information utile pour l'attaque
+    out = check_output(["./client", "127.0.0.1", "8080", url], env=env).decode('utf-8')
-    return check_output(["./client", "127.0.0.1", "8080", url]).decode('utf-8')
+    return int(out.split(' ')[1])
 ```