Use AppKey (#534)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

aiohttp_jinja2/__init__.py

@@ -4,37 +4,45 @@
     Awaitable,
     Callable,
     Dict,
+    Final,
     Mapping,
     Optional,
     Protocol,
     Sequence,
     Tuple,
     TypeVar,
     Union,
-    cast,
     overload,
 )
 
 import jinja2
 from aiohttp import web
 from aiohttp.abc import AbstractView
 
-from .helpers import GLOBAL_HELPERS
+from .helpers import GLOBAL_HELPERS, static_root_key
 from .typedefs import Filters
 
 __version__ = "1.5.1"
 
-__all__ = ("setup", "get_env", "render_template", "render_string", "template")
-
-
-APP_CONTEXT_PROCESSORS_KEY = "aiohttp_jinja2_context_processors"
-APP_KEY = "aiohttp_jinja2_environment"
-REQUEST_CONTEXT_KEY = "aiohttp_jinja2_context"
+__all__ = (
+    "get_env",
+    "render_string",
+    "render_template",
+    "setup",
+    "static_root_key",
+    "template",
+)
 
 _TemplateReturnType = Awaitable[Union[web.StreamResponse, Mapping[str, Any]]]
 _SimpleTemplateHandler = Callable[[web.Request], _TemplateReturnType]
 _ContextProcessor = Callable[[web.Request], Awaitable[Dict[str, Any]]]
 
+APP_CONTEXT_PROCESSORS_KEY: Final = web.AppKey[Sequence[_ContextProcessor]](
+    "APP_CONTEXT_PROCESSORS_KEY"
+)
+APP_KEY: Final = web.AppKey[jinja2.Environment]("APP_KEY")
+REQUEST_CONTEXT_KEY: Final = "aiohttp_jinja2_context"
+
 _T = TypeVar("_T")
 _AbstractView = TypeVar("_AbstractView", bound=AbstractView)
 
@@ -62,7 +70,7 @@ def __call__(
 def setup(
     app: web.Application,
     *args: Any,
-    app_key: str = APP_KEY,
+    app_key: web.AppKey[jinja2.Environment] = APP_KEY,
     context_processors: Sequence[_ContextProcessor] = (),
     filters: Optional[Filters] = None,
     default_helpers: bool = True,
@@ -84,23 +92,24 @@ def setup(
     return env
 
 
-def get_env(app: web.Application, *, app_key: str = APP_KEY) -> jinja2.Environment:
-    return cast(jinja2.Environment, app.get(app_key))
+def get_env(
+    app: web.Application, *, app_key: web.AppKey[jinja2.Environment] = APP_KEY
+) -> jinja2.Environment:
+    try:
+        return app[app_key]
+    except KeyError:
+        raise RuntimeError("aiohttp_jinja2.setup(...) must be called first.")
 
 
 def _render_string(
     template_name: str,
     request: web.Request,
     context: Mapping[str, Any],
-    app_key: str,
+    app_key: web.AppKey[jinja2.Environment],
 ) -> Tuple[jinja2.Template, Mapping[str, Any]]:
     env = request.config_dict.get(app_key)
     if env is None:
-        text = (
-            "Template engine is not initialized, "
-            "call aiohttp_jinja2.setup(..., app_key={}) first"
-            "".format(app_key)
-        )
+        text = "Template engine is not initialized, call aiohttp_jinja2.setup() first"
         # in order to see meaningful exception message both: on console
         # output and rendered page we add same message to *reason* and
         # *text* arguments.
@@ -124,7 +133,7 @@ def render_string(
     request: web.Request,
     context: Mapping[str, Any],
     *,
-    app_key: str = APP_KEY,
+    app_key: web.AppKey[jinja2.Environment] = APP_KEY,
 ) -> str:
     template, context = _render_string(template_name, request, context, app_key)
     return template.render(context)
@@ -135,7 +144,7 @@ async def render_string_async(
     request: web.Request,
     context: Mapping[str, Any],
     *,
-    app_key: str = APP_KEY,
+    app_key: web.AppKey[jinja2.Environment] = APP_KEY,
 ) -> str:
     template, context = _render_string(template_name, request, context, app_key)
     return await template.render_async(context)
@@ -159,7 +168,7 @@ def render_template(
     request: web.Request,
     context: Optional[Mapping[str, Any]],
     *,
-    app_key: str = APP_KEY,
+    app_key: web.AppKey[jinja2.Environment] = APP_KEY,
     encoding: str = "utf-8",
     status: int = 200,
 ) -> web.Response:
@@ -173,7 +182,7 @@ async def render_template_async(
     request: web.Request,
     context: Optional[Mapping[str, Any]],
     *,
-    app_key: str = APP_KEY,
+    app_key: web.AppKey[jinja2.Environment] = APP_KEY,
     encoding: str = "utf-8",
     status: int = 200,
 ) -> web.Response:
@@ -187,7 +196,7 @@ async def render_template_async(
 def template(
     template_name: str,
     *,
-    app_key: str = APP_KEY,
+    app_key: web.AppKey[jinja2.Environment] = APP_KEY,
     encoding: str = "utf-8",
     status: int = 200,
 ) -> _TemplateWrapper:

aiohttp_jinja2/helpers.py

@@ -2,6 +2,7 @@
 useful context functions, see
 http://jinja.pocoo.org/docs/dev/api/#jinja2.contextfunction
 """
+import warnings
 from typing import Dict, Optional, TypedDict, Union
 
 import jinja2
@@ -13,6 +14,9 @@ class _Context(TypedDict, total=False):
     app: web.Application
 
 
+static_root_key = web.AppKey("static_root_key", str)
+
+
 @jinja2.pass_context
 def url_for(
     context: _Context,
@@ -55,21 +59,30 @@ def url_for(
 def static_url(context: _Context, static_file_path: str) -> str:
     """Filter for generating urls for static files.
 
-    NOTE: you'll need
-    to set app['static_root_url'] to be used as the root for the urls returned.
+    NOTE: you'll need to set app[aiohttp_jinja2.static_root_key] to be used as the
+    root for the urls returned.
 
     Usage: {{ static('styles.css') }} might become
     "/static/styles.css" or "http://mycdn.example.com/styles.css"
     """
     app = context["app"]
     try:
-        static_url = app["static_root_url"]
+        static_url = app[static_root_key]
     except KeyError:
-        raise RuntimeError(
-            "app does not define a static root url "
-            "'static_root_url', you need to set the url root "
-            "with app['static_root_url'] = '<static root>'."
-        ) from None
+        try:
+            # TODO (aiohttp 3.10+): Remove this fallback
+            static_url = app["static_root_url"]
+        except KeyError:
+            raise RuntimeError(
+                "app does not define a static root url, you need to set the url root "
+                "with app[aiohttp_jinja2.static_root_key] = '<static root>'."
+            ) from None
+        else:
+            warnings.warn(
+                "'static_root_url' is deprecated, use aiohttp_jinja2.static_root_key.",
+                category=DeprecationWarning,
+                stacklevel=2,
+            )
     return "{}/{}".format(static_url.rstrip("/"), static_file_path.lstrip("/"))
 
 

docs/index.rst

@@ -201,14 +201,13 @@ This is useful as it would allow your static path to switch in
 deployment or testing with just one line.
 
 The ``static`` function has similar usage, except it requires you to
-set ``static_root_url`` on the app
+set ``app[aiohttp_jinja2.static_root_key]``.
 
-.. code-block:: ruby
+.. code-block:: python
 
     app = web.Application()
-    aiohttp_jinja2.setup(app,
-        loader=jinja2.FileSystemLoader('/path/to/templates/folder'))
-    app['static_root_url'] = '/static'
+    aiohttp_jinja2.setup(app, loader=jinja2.FileSystemLoader("/path/to/templates/folder"))
+    app[aiohttp_jinja2.static_root_key] = "/static"
 
 Then in the template::
 

requirements.txt

@@ -1,5 +1,5 @@
 -e .
-aiohttp==3.8.6
+aiohttp==3.9.0
 alabaster>=0.6.2
 coverage==7.2.7
 jinja2==3.1.2

setup.py

@@ -52,6 +52,6 @@ def read(f):
     license="Apache 2",
     packages=["aiohttp_jinja2"],
     python_requires=">=3.8",
-    install_requires=("aiohttp>=3.6.3", "jinja2>=3.0.0"),
+    install_requires=("aiohttp>=3.9.0", "jinja2>=3.0.0"),
     include_package_data=True,
 )

tests/test_context_processors.py

@@ -1,4 +1,4 @@
-from typing import Dict, Union
+from typing import Dict, Tuple, Union
 
 import jinja2
 from aiohttp import web
@@ -22,10 +22,11 @@ async def func(request):
     async def processor(request: web.Request) -> Dict[str, Union[str, int]]:
         return {"foo": 1, "bar": "should be overwriten"}
 
-    app["aiohttp_jinja2_context_processors"] = (
+    f: Tuple[aiohttp_jinja2._ContextProcessor, ...] = (
         aiohttp_jinja2.request_processor,
         processor,
     )
+    app[aiohttp_jinja2.APP_CONTEXT_PROCESSORS_KEY] = f
 
     app.router.add_get("/", func)
 
@@ -56,7 +57,7 @@ async def func(request):
     async def subprocessor(request):
         return {"foo": 1, "bar": "should be overwriten"}
 
-    subapp["aiohttp_jinja2_context_processors"] = (
+    subapp[aiohttp_jinja2.APP_CONTEXT_PROCESSORS_KEY] = (
         aiohttp_jinja2.request_processor,
         subprocessor,
     )
@@ -69,7 +70,7 @@ async def subprocessor(request):
     async def processor(request):
         return {"baz": 5}
 
-    app["aiohttp_jinja2_context_processors"] = (
+    app[aiohttp_jinja2.APP_CONTEXT_PROCESSORS_KEY] = (
         aiohttp_jinja2.request_processor,
         processor,
     )

tests/test_jinja_globals.py

@@ -141,7 +141,7 @@ async def index(request):
         app, loader=jinja2.DictLoader({"tmpl.jinja2": "{{ static('whatever.js') }}"})
     )
 
-    app["static_root_url"] = "/static"
+    app[aiohttp_jinja2.static_root_key] = "/static"
     app.router.add_route("GET", "/", index)
     client = await aiohttp_client(app)
 
@@ -153,7 +153,7 @@ async def index(request):
 
 async def test_static_var_missing(aiohttp_client, caplog):
     async def index(request):
-        with pytest.raises(RuntimeError, match="static_root_url"):
+        with pytest.raises(RuntimeError, match="static_root_key"):
             aiohttp_jinja2.render_template("tmpl.jinja2", request, {})
         return web.Response()
 
@@ -166,4 +166,4 @@ async def index(request):
     client = await aiohttp_client(app)
 
     resp = await client.get("/")
-    assert 200 == resp.status  # static_root_url is not set
+    assert 200 == resp.status  # static_root_key is not set

tests/test_simple_renderer.py

@@ -107,11 +107,7 @@ async def func(request: web.Request) -> web.Response:
     app.router.add_route("GET", "/", func)
 
     req = make_mocked_request("GET", "/", app=app)
-    msg = (
-        "Template engine is not initialized, "
-        "call aiohttp_jinja2.setup(..., app_key={}"
-        ") first".format(aiohttp_jinja2.APP_KEY)
-    )
+    msg = "Template engine is not initialized, call aiohttp_jinja2.setup() first"
 
     with pytest.raises(web.HTTPInternalServerError) as ctx:
         await func(req)