Create an AUTH configuration and put it in a context variable

Signed-off-by: Federico Busetti <[email protected]>

Author: febus982

src/common/config.py

@@ -12,10 +12,16 @@ class DramatiqConfig(BaseModel):
     REDIS_URL: Optional[str] = None
 
 
+class AuthConfig(BaseModel):
+    JWT_ALGORITHM: str = "HS256"
+    JWKS_URL: Optional[str] = None
+
+
 class AppConfig(BaseSettings):
     model_config = SettingsConfigDict(env_nested_delimiter="__")
 
     APP_NAME: str = "bootstrap"
+    AUTH: AuthConfig = AuthConfig()
     DRAMATIQ: DramatiqConfig = DramatiqConfig()
     DEBUG: bool = False
     ENVIRONMENT: TYPE_ENVIRONMENT = "local"

src/http_app/__init__.py

@@ -7,13 +7,24 @@
 from structlog import get_logger
 
 from common import AppConfig, application_init
+from http_app import context
 from http_app.routes import init_routes
 
 
 def create_app(
     test_config: Union[AppConfig, None] = None,
 ) -> FastAPI:
     app_config = test_config or AppConfig()
+
+    """
+    The config is submitted here at runtime, this means
+    that we cannot declare a function to be used with
+    FastAPI dependency injection system because Depends
+    is evaluated before this function is called.
+    A context variable will achieve the same purpose.
+    """
+    context.app_config.set(app_config)
+
     application_init(app_config)
     app = FastAPI(
         debug=app_config.DEBUG,

src/http_app/context.py

@@ -0,0 +1,5 @@
+from contextvars import ContextVar
+
+from common import AppConfig
+
+app_config: ContextVar[AppConfig] = ContextVar("app_config")