[FIX] Prevent keys from starting with slashes (#172)

* [FIX] Prevent keys from starting with slashes

If a key starts with a slash, then it becomes undeletable and prevents database purges from working properly as well.
This prevents that from occuring by stripping slashes from the left of the key name.

* Double newlines for flake8

* flake8 wanted another newline here

* Force `set_bulk_raw` to handle keys with slashes as well

* Add tests for keys starting with a slash

* Fix a typo I made twice

* flake8

* `del self.db[k]` not `self.db.delete(k)` in non-Async

* One space for flake8

* These were also wrong

* These shouldn't be using `get`

* Match format of some of the other tests in TestDatabase

* Perhaps the key is corrupted?

* Have to `get_raw` for `_raw` calls.

* Reassociate _dumps with def dumps

* Only call keyStrip at the root of the .set function hierarchy

* Clarify that keyStrip is an internal method

---------

Co-authored-by: Devon Stewart <devon.stewart@repl.it>

src/replit/database/database.py

@@ -61,6 +61,18 @@ def dumps(val: Any) -> str:
 _dumps = dumps
 
 
+def _sanitize_key(key: str) -> str:
+    """Strip slashes from the beginning of keys.
+
+    Args:
+        key (str): The key to strip
+
+    Returns:
+        str: The stripped key
+    """
+    return key.lstrip("/")
+
+
 class AsyncDatabase:
     """Async interface for Replit Database.
 
@@ -195,6 +207,7 @@ async def set_bulk_raw(self, values: Dict[str, str]) -> None:
         Args:
             values (Dict[str, str]): The key-value pairs to set.
         """
+        values = {_sanitize_key(k): v for k, v in values.items()}
         async with self.client.post(self.db_url, data=values) as response:
             response.raise_for_status()
 
@@ -629,6 +642,7 @@ def set_bulk_raw(self, values: Dict[str, str]) -> None:
         Args:
             values (Dict[str, str]): The key-value pairs to set.
         """
+        values = {_sanitize_key(k): v for k, v in values.items()}
         r = self.sess.post(self.db_url, data=values)
         r.raise_for_status()
 

tests/test_database.py

@@ -125,6 +125,33 @@ async def test_bulk_raw(self) -> None:
         self.assertEqual(await self.db.get_raw("bulk1"), "val1")
         self.assertEqual(await self.db.get_raw("bulk2"), "val2")
 
+    async def test_slash_keys(self) -> None:
+        """Test that slash keys work."""
+        k = "/key"
+        # set
+        await self.db.set(k,"val1")
+        self.assertEqual(await self.db.get(k), "val1")
+        await self.db.delete(k)
+        with self.assertRaises(KeyError):
+            await self.db.get(k)
+        # set_raw
+        await self.db.set_raw(k,"val1")
+        self.assertEqual(await self.db.get_raw(k), "val1")
+        await self.db.delete(k)
+        with self.assertRaises(KeyError):
+            await self.db.get(k)
+        # set_bulk
+        await self.db.set_bulk({k: "val1"})
+        self.assertEqual(await self.db.get(k), "val1")
+        await self.db.delete(k)
+        with self.assertRaises(KeyError):
+            await self.db.get(k)
+        # set_bulk_raw
+        await self.db.set_bulk_raw({k: "val1"})
+        self.assertEqual(await self.db.get_raw(k), "val1")
+        await self.db.delete(k)
+        with self.assertRaises(KeyError):
+            await self.db.get(k)
 
 class TestDatabase(unittest.TestCase):
     """Tests for replit.database.Database."""
@@ -259,3 +286,31 @@ def test_bulk_raw(self) -> None:
         self.db.set_bulk_raw({"bulk1": "val1", "bulk2": "val2"})
         self.assertEqual(self.db.get_raw("bulk1"), "val1")
         self.assertEqual(self.db.get_raw("bulk2"), "val2")
+
+    def test_slash_keys(self) -> None:
+        """Test that slash keys work."""
+        k = "/key"
+        # set
+        self.db.set(k,"val1")
+        self.assertEqual(self.db[k], "val1")
+        del self.db[k]
+        with self.assertRaises(KeyError):
+            self.db[k]
+        # set_raw
+        self.db.set_raw(k,"val1")
+        self.assertEqual(self.db.get_raw(k), "val1")
+        del self.db[k]
+        with self.assertRaises(KeyError):
+            self.db[k]
+        # set_bulk
+        self.db.set_bulk({k: "val1"})
+        self.assertEqual(self.db.get(k), "val1")
+        del self.db[k]
+        with self.assertRaises(KeyError):
+            self.db[k]
+        # set_bulk_raw
+        self.db.set_bulk_raw({k: "val1"})
+        self.assertEqual(self.db.get_raw(k), "val1")
+        del self.db[k]
+        with self.assertRaises(KeyError):
+            self.db[k]