diff --git a/fileserver.py b/fileserver.py
index f23b2c0..442998b 100755
--- a/fileserver.py
+++ b/fileserver.py
@@ -91,14 +91,23 @@ class FileServerRequestHandler(BaseHTTPRequestHandler):
                 status_code = 200 if len(result) < 1 else result[0]
                 data        = b"" if len(result) < 2 else result[1]
                 headers     = { } if len(result) < 3 else result[2]
-            else:
+            elif isinstance(result, int):
                 status_code = result
                 data = b""
                 headers = {}
+            elif result is None:
+                status_code = 201
+                data = b""
+                headers = {}
+            else:
+                status_code = 200
+                data = data if type(data) in [bytes, bytearray] else str(data).encode()
+                headers = {}
 
             if path in self.server.dumpRequests:
                 headers["Access-Control-Allow-Origin"] = "*"
-
+            
+            headers["Connection"] = "Close"
             headers["Content-Length"] = len(util.nvl(data, b""))
 
             if len(headers) == 0:
@@ -174,7 +183,7 @@ class HttpFileServer(HTTPServer):
             data = data.encode("UTF-8")
     
         headers = { 
-            "Access-Control-Allow-Origin": "*",
+            "Access-Control-Allow-Origin": "*"
         }
         
         if mime_type:
diff --git a/sqli.py b/sqli.py
index da47a3f..bc6ad3e 100644
--- a/sqli.py
+++ b/sqli.py
@@ -33,6 +33,10 @@ class SQLi(ABC):
 
         return rows
 
+    @abstractmethod
+    def ascii(self):
+        pass
+
     @abstractmethod
     def extract_int(self, column: str, table=None, condition=None, 
                     offset=None, verbose=False):
@@ -201,7 +205,7 @@ class BlindSQLi(SQLi, ABC):
         cur_str = ""
         while True:
             found = False
-            cur_column = f"ascii(substr({column},{len(cur_str) + 1},1))"
+            cur_column = self.ascii() + f"(substr({column},{len(cur_str) + 1},1))"
             if charset:
                 query = self.build_query(cur_column, table, condition, offset)
                 for c in charset:
@@ -249,6 +253,8 @@ class PostgreSQLi(SQLi, ABC):
                                              f"table_schema='{schema}' AND table_name='{table}'",
                                              verbose=verbose)
 
+    def ascii(self):
+        return "ascii"
 
 class MySQLi(SQLi, ABC):
     def get_database_version(self, verbose=False):
@@ -268,3 +274,28 @@ class MySQLi(SQLi, ABC):
         return self.extract_multiple_strings("column_name", "information_schema.columns",
                                              f"table_schema='{schema}' AND table_name='{table}'",
                                              verbose=verbose)
+
+    def ascii(self):
+        return "ascii"
+
+
+class SQLitei(SQLi, ABC):
+    def get_database_version(self, verbose=False):
+        return self.extract_string("sqlite_version()", verbose=verbose)
+
+    def get_current_user(self, verbose=False):
+        raise Exception("Not implemented!")
+
+    def get_current_database(self, verbose=False):
+        raise Exception("Not implemented!")
+
+    def get_table_names(self, verbose=False):
+        return self.extract_multiple_strings("name", "sqlite_schema", f"type='table'",
+                                             verbose=verbose)
+
+    def get_column_names(self, table: str, schema: str, verbose=False):
+        # TODO: we could query the "sql" column and parse it using regex
+        raise Exception("Not implemented!")
+
+    def ascii(self):
+        return "unicode"