redis caching for webdav

api/ovdashboard_api/app.py

@@ -13,8 +13,8 @@ from fastapi import FastAPI
 from fastapi.middleware.cors import CORSMiddleware
 from fastapi.staticfiles import StaticFiles
 
+from .core.dav.webdav import WebDAV
 from .core.settings import SETTINGS
-from .core.webdav import WebDAV
 from .routers import v1_router
 
 _logger = logging.getLogger(__name__)

api/ovdashboard_api/core/dav/caldav.py

@@ -8,9 +8,9 @@ from cachetools import TTLCache, cachedmethod
 from caldav import Calendar, DAVClient, Event, Principal
 from vobject.base import Component, toVName
 
-from .calevent import CalEvent
+from ..calevent import CalEvent
-from .config import Config
+from ..config import Config
-from .settings import SETTINGS
+from ..settings import SETTINGS
 from .webdav import davkey
 
 _logger = logging.getLogger(__name__)

api/ovdashboard_api/core/dav/helpers.py

@@ -0,0 +1,54 @@
+from json import JSONDecodeError
+
+import requests
+from cachetools.keys import hashkey
+from CacheToolsUtils import RedisCache as __RedisCache
+from redis.commands.core import ResponseT
+from redis.typing import EncodableT
+from webdav3.client import Client as __WebDAVclient
+
+
+def davkey(name, _, *args, **kwargs):
+    """Return a cache key for use with cached methods."""
+
+    key = hashkey(name, *args, **kwargs)
+    return hashkey(*(str(key_item) for key_item in key))
+
+
+class WebDAVclient(__WebDAVclient):
+    def execute_request(
+        self,
+        action,
+        path,
+        data=None,
+        headers_ext=None,
+    ) -> requests.Response:
+        res = super().execute_request(action, path, data, headers_ext)
+
+        # the "Content-Length" header can randomly be missing on txt files,
+        # this should fix that (probably serverside bug)
+        if action == "download" and "Content-Length" not in res.headers:
+            res.headers["Content-Length"] = str(len(res.text))
+
+        return res
+
+
+class RedisCache(__RedisCache):
+    """
+    Redis handles <bytes>, so ...
+    """
+
+    def _serialize(self, s) -> EncodableT:
+        if isinstance(s, bytes):
+            return s
+
+        else:
+            return super()._serialize(s)
+
+    def _deserialize(self, s: ResponseT):
+        try:
+            return super()._deserialize(s)
+
+        except (UnicodeDecodeError, JSONDecodeError):
+            assert isinstance(s, bytes)
+            return s

api/ovdashboard_api/core/dav/webdav.py

@@ -3,53 +3,33 @@ import logging
 import re
 from io import BytesIO
 
-import requests
 from asyncify import asyncify
-from cachetools import TTLCache, cachedmethod
+from cachetools import cachedmethod
-from cachetools.keys import hashkey
+from redis import Redis
-from webdav3.client import Client as WebDAVclient
 
-from .settings import SETTINGS
+from ..settings import SETTINGS
+from .helpers import RedisCache, WebDAVclient, davkey
 
 _logger = logging.getLogger(__name__)
 
 
-def davkey(name, _, *args, **kwargs):
-    """Return a cache key for use with cached methods."""
-
-    return hashkey(name, *args, **kwargs)
-
-
 class WebDAV:
-    class __WebDAVclient(WebDAVclient):
+    _webdav_client = WebDAVclient(
-        def execute_request(
-            self,
-            action,
-            path,
-            data=None,
-            headers_ext=None,
-        ) -> requests.Response:
-            res = super().execute_request(action, path, data, headers_ext)
-
-            # the "Content-Length" header can randomly be missing on txt files,
-            # this should fix that (probably serverside bug)
-            if action == "download" and "Content-Length" not in res.headers:
-                res.headers["Content-Length"] = str(len(res.text))
-
-            return res
-
-    _webdav_client = __WebDAVclient(
         {
             "webdav_hostname": SETTINGS.webdav.url,
             "webdav_login": SETTINGS.webdav.username,
             "webdav_password": SETTINGS.webdav.password,
-            "disable_check": SETTINGS.webdav.disable_check,
         }
     )
 
-    _cache = TTLCache(
+    _cache = RedisCache(
+        cache=Redis(
+            host=SETTINGS.redis.host,
+            port=SETTINGS.redis.port,
+            db=SETTINGS.redis.db,
+            protocol=SETTINGS.redis.protocol,
+        ),
         ttl=SETTINGS.webdav.cache_ttl,
-        maxsize=SETTINGS.webdav.cache_size,
     )
 
     @classmethod
@@ -125,7 +105,7 @@ class WebDAV:
         cls._webdav_client.upload_to(buffer, path)
 
         # invalidate cache entry
-        cls._cache.pop(hashkey("read_bytes", path))
+        cls._cache.pop(davkey("read_bytes", None, path))
 
     @classmethod
     async def write_str(cls, path: str, content: str, encoding="utf-8") -> None:

api/ovdashboard_api/core/dav_common.py

@@ -7,7 +7,7 @@ from os import path
 from pathlib import Path
 
 from .. import __file__ as OVD_INIT
-from .webdav import WebDAV
+from .dav.webdav import WebDAV
 
 _logger = logging.getLogger(__name__)
 

api/ovdashboard_api/core/settings.py

@@ -26,7 +26,6 @@ class DAVSettings(BaseModel):
     password: str | None = None
 
     cache_ttl: int = 60 * 10
-    cache_size: int = 1024
 
     @property
     def url(self) -> str:
@@ -66,6 +65,17 @@ class WebDAVSettings(DAVSettings):
         return f"{self.protocol}://{self.host}{self.path}{self.prefix}"
 
 
+class RedisSettings(BaseModel):
+    """
+    Connection to a redis server.
+    """
+
+    host: str = "redis"
+    port: int = 6379
+    db: int = 0
+    protocol: int = 3
+
+
 class Settings(BaseSettings):
     """
     Per-run settings.
@@ -123,6 +133,12 @@ class Settings(BaseSettings):
 
     caldav: DAVSettings = DAVSettings()
 
+    #####
+    # redis settings
+    #####
+
+    redis: RedisSettings = RedisSettings()
+
     @model_validator(mode="before")
     @classmethod
     def validate_dav_settings(cls, data) -> dict[str, Any]:

api/ovdashboard_api/routers/v1/_common.py

@@ -10,10 +10,10 @@ import tomli_w
 from fastapi import Depends, HTTPException, params, status
 from webdav3.exceptions import RemoteResourceNotFound
 
-from ...core.caldav import CalDAV
 from ...core.config import Config
+from ...core.dav.caldav import CalDAV
+from ...core.dav.webdav import WebDAV
 from ...core.settings import SETTINGS
-from ...core.webdav import WebDAV
 from ._list_manager import Dependable, DependableFn, ListManager
 
 _logger = logging.getLogger(__name__)

api/ovdashboard_api/routers/v1/aggregate.py

@@ -10,9 +10,9 @@ import logging
 
 from fastapi import APIRouter, Depends
 
-from ...core.caldav import CalDAV
 from ...core.calevent import CalEvent
 from ...core.config import Config
+from ...core.dav.caldav import CalDAV
 from ._common import LM_AGGREGATE, LM_CALENDAR, get_config
 
 _logger = logging.getLogger(__name__)

api/ovdashboard_api/routers/v1/calendar.py

@@ -10,8 +10,8 @@ import logging
 
 from fastapi import APIRouter, Depends
 
-from ...core.caldav import CalDAV, CalEvent
 from ...core.config import CalendarUIConfig, Config
+from ...core.dav.caldav import CalDAV, CalEvent
 from ._common import LM_CALENDAR, get_config
 
 _logger = logging.getLogger(__name__)

api/ovdashboard_api/routers/v1/file.py

@@ -13,8 +13,8 @@ from fastapi import APIRouter, Depends
 from fastapi.responses import StreamingResponse
 from magic import Magic
 
+from ...core.dav.webdav import WebDAV
 from ...core.dav_common import webdav_ensure_files, webdav_ensure_path
-from ...core.webdav import WebDAV
 from ._common import LM_FILE, RP_FILE
 
 _logger = logging.getLogger(__name__)

api/ovdashboard_api/routers/v1/image.py

@@ -14,8 +14,8 @@ from fastapi.responses import StreamingResponse
 from PIL import Image
 
 from ...core.config import Config, ImageUIConfig
+from ...core.dav.webdav import WebDAV
 from ...core.dav_common import webdav_ensure_files, webdav_ensure_path
-from ...core.webdav import WebDAV
 from ._common import LM_IMAGE, RP_IMAGE, get_config
 
 _logger = logging.getLogger(__name__)

api/ovdashboard_api/routers/v1/text.py

@@ -12,8 +12,8 @@ import logging
 import markdown
 from fastapi import APIRouter, Depends
 
+from ...core.dav.webdav import WebDAV
 from ...core.dav_common import webdav_ensure_files, webdav_ensure_path
-from ...core.webdav import WebDAV
 from ._common import LM_TEXT, RP_TEXT
 
 _logger = logging.getLogger(__name__)

api/ovdashboard_api/routers/v1/ticker.py

@@ -13,8 +13,8 @@ import markdown
 from fastapi import APIRouter, Depends
 
 from ...core.config import Config, TickerUIConfig
+from ...core.dav.webdav import WebDAV
 from ...core.dav_common import webdav_ensure_files, webdav_ensure_path
-from ...core.webdav import WebDAV
 from ._common import LM_TEXT, RP_TEXT, get_config
 
 _logger = logging.getLogger(__name__)

api/poetry.lock

@@ -1,4 +1,4 @@
-# This file is automatically @generated by Poetry 1.6.1 and should not be changed by hand.
+# This file is automatically @generated by Poetry 1.7.0 and should not be changed by hand.
 
 [[package]]
 name = "annotated-types"
@@ -97,6 +97,26 @@ files = [
     {file = "cachetools-5.3.2.tar.gz", hash = "sha256:086ee420196f7b2ab9ca2db2520aca326318b68fe5ba8bc4d49cca91add450f2"},
 ]
 
+[[package]]
+name = "cachetoolsutils"
+version = "8.2"
+description = "Cachetools Utilities"
+optional = false
+python-versions = ">=3.10"
+files = [
+    {file = "CacheToolsUtils-8.2-py3-none-any.whl", hash = "sha256:721cd4d63477f4de3ba2108f6b8e5b1a9708075eeb72e4770e814f4826815846"},
+    {file = "CacheToolsUtils-8.2.tar.gz", hash = "sha256:a8ece7af5fcc221dfec747dffce4bbfd7e6b45ef315c3aefedb844790c9d1f59"},
+]
+
+[package.dependencies]
+cachetools = "*"
+
+[package.extras]
+dev = ["black", "coverage", "flake8", "mypy", "pymarkdownlnt", "pytest", "types-cachetools", "types-redis"]
+doc = ["myst-parser", "sphinx", "sphinx-autoapi", "sphinx-lint", "sphinx-rtd-theme"]
+pub = ["build", "twine", "wheel"]
+tests = ["pymemcache", "redis"]
+
 [[package]]
 name = "caldav"
 version = "1.3.6"
@@ -330,6 +350,104 @@ files = [
     {file = "h11-0.14.0.tar.gz", hash = "sha256:8f19fbbe99e72420ff35c00b27a34cb9937e902a8b810e2c88300c6f0a3b699d"},
 ]
 
+[[package]]
+name = "hiredis"
+version = "2.2.3"
+description = "Python wrapper for hiredis"
+optional = false
+python-versions = ">=3.7"
+files = [
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+]
+
 [[package]]
 name = "httptools"
 version = "0.6.1"
@@ -969,6 +1087,24 @@ python-dateutil = ">=2.8.1"
 pytz = ">=2023.3"
 x-wr-timezone = ">=0.0.5,<1.0.0"
 
+[[package]]
+name = "redis"
+version = "5.0.1"
+description = "Python client for Redis database and key-value store"
+optional = false
+python-versions = ">=3.7"
+files = [
+    {file = "redis-5.0.1-py3-none-any.whl", hash = "sha256:ed4802971884ae19d640775ba3b03aa2e7bd5e8fb8dfaed2decce4d0fc48391f"},
+    {file = "redis-5.0.1.tar.gz", hash = "sha256:0dab495cd5753069d3bc650a0dde8a8f9edde16fc5691b689a566eda58100d0f"},
+]
+
+[package.dependencies]
+hiredis = {version = ">=1.0.0", optional = true, markers = "extra == \"hiredis\""}
+
+[package.extras]
+hiredis = ["hiredis (>=1.0.0)"]
+ocsp = ["cryptography (>=36.0.1)", "pyopenssl (==20.0.1)", "requests (>=2.26.0)"]
+
 [[package]]
 name = "requests"
 version = "2.31.0"
@@ -1405,4 +1541,4 @@ typing-extensions = ">=4.4.0"
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.12"
-content-hash = "ec9e330d56137c0c7cc7b88b894553ada7693ba2902e2064a94355b38affa327"
+content-hash = "fa02b5cf385dac14ae6e86ea8c33aa960a2a8394d401566b99f7dcece2c66a6a"

api/pyproject.toml

@@ -10,11 +10,13 @@ Markdown = "^3.5"
 Pillow = "^10.1.0"
 asyncify = "^0.9.2"
 cachetools = "^5.3.2"
+cachetoolsutils = "^8.2"
 caldav = "^1.3.6"
 fastapi = "^0.103.2"
 pydantic-settings = "^2.0.3"
 python = "^3.12"
 python-magic = "^0.4.27"
+redis = {extras = ["hiredis"], version = "^5.0.1"}
 tomli-w = "^1.0.0"
 uvicorn = {extras = ["standard"], version = "^0.23.2"}
 webdavclient3 = "^3.14.6"