diff --git a/api/advent22_api/core/webdav.py b/api/advent22_api/core/webdav.py
index 66d1e20..d10de41 100644
--- a/api/advent22_api/core/webdav.py
+++ b/api/advent22_api/core/webdav.py
@@ -1,7 +1,5 @@
 import re
-from contextlib import asynccontextmanager
-from io import BytesIO, TextIOWrapper
-from typing import AsyncContextManager, AsyncIterator
+from io import BytesIO
 
 from cache import AsyncTTL
 from webdav3.client import Client as WebDAVclient
@@ -44,38 +42,25 @@ class WebDAV:
 
         return cls._webdav_client.check(path)
 
+    @AsyncTTL(time_to_live=SETTINGS.cache_ttl)
     @classmethod
-    async def read_buffer(cls, path: str) -> AsyncContextManager[BytesIO]:
+    async def read_bytes(cls, path: str) -> bytes:
         """
-        Datei aus Pfad `path` in einen `BytesIO` Puffer laden
+        Datei aus Pfad `path` als bytes laden
         """
 
-        @AsyncTTL(time_to_live=SETTINGS.cache_ttl)
-        async def inner() -> BytesIO:
-            buffer = BytesIO()
-            cls._webdav_client.resource(path).write_to(buffer)
-            return buffer
-
-        @asynccontextmanager
-        async def ctx() -> AsyncIterator[BytesIO]:
-            buffer = await inner()
-            buffer.seek(0)
-            yield buffer
-
-        return ctx()
+        buffer = BytesIO()
+        cls._webdav_client.resource(path).write_to(buffer)
+        return buffer.read()
 
     @AsyncTTL(time_to_live=SETTINGS.cache_ttl)
     @classmethod
-    async def read_text(cls, path: str, encoding="utf-8") -> str:
+    async def read_str(cls, path: str, encoding="utf-8") -> str:
         """
-        Datei aus Pfad `path` als string zurückgeben
+        Datei aus Pfad `path` als string laden
         """
 
-        async with await cls.read_buffer(path) as buffer:
-            tio = TextIOWrapper(buffer, encoding=encoding)
-            tio.seek(0)
-
-            return tio.read().strip()
+        return (await cls.read_bytes(path)).decode(encoding=encoding).strip()
 
     @classmethod
     async def write_buffer(cls, path: str, buffer: BytesIO) -> None:
@@ -86,7 +71,7 @@ class WebDAV:
         cls._webdav_client.resource(path).read_from(buffer)
 
     @classmethod
-    async def write_text(cls, path: str, content: str, encoding="utf-8") -> None:
+    async def write_str(cls, path: str, content: str, encoding="utf-8") -> None:
         """
         String `content` in Datei in Pfad `path` schreiben
         """
diff --git a/api/asynccontextmanager.py b/api/asynccontextmanager.py
deleted file mode 100644
index 25abf5c..0000000
--- a/api/asynccontextmanager.py
+++ /dev/null
@@ -1,56 +0,0 @@
-import asyncio
-import functools
-from io import BytesIO
-
-from cache import AsyncLRU
-
-FILES = __file__, "pyproject.toml"
-REPS = 3
-
-#
-# sync impl
-#
-
-
-@functools.lru_cache
-def get_bytes_sync(fn) -> bytes:
-    print("sync open")
-    with open(fn, "rb") as file:
-        return file.readline()
-
-
-def get_buf_sync(fn) -> BytesIO:
-    return BytesIO(get_bytes_sync(fn))
-
-
-def main_sync() -> None:
-    for fn in FILES:
-        for _ in range(REPS):
-            print(get_buf_sync(fn).read())
-
-
-#
-# async impl
-#
-
-
-@AsyncLRU()
-async def get_bytes_async(fn) -> bytes:
-    print("async open")
-    with open(fn, "rb") as file:
-        return file.readline()
-
-
-async def get_buf_async(fn) -> BytesIO:
-    return BytesIO(await get_bytes_async(fn))
-
-
-async def main_async() -> None:
-    for fn in FILES:
-        for _ in range(REPS):
-            print((await get_buf_async(fn)).read())
-
-
-if __name__ == "__main__":
-    main_sync()
-    asyncio.run(main_async())