Add endpoint to read CONTENT environment variable

- Created a new endpoint at /api/v1/env/content that returns the CONTENT environment variable
- Added error handling for when the environment variable is not set
- Updated documentation with new endpoint information and usage examples
- Added environment variables as a new feature in README

README.md

@@ -7,6 +7,7 @@ A simple Todo API built with FastAPI and SQLite.
 - 📝 **Todo Management**: Create, read, update, and delete todo items
 - 🔍 **Filtering & Pagination**: Filter todos by completion status and paginate results
 - 📊 **Health Monitoring**: Endpoint to check application and database health
+- 🔧 **Environment Variables**: Access to environment variables via API
 - 🛡️ **Error Handling**: Comprehensive error handling with meaningful messages
 - 📚 **API Documentation**: Auto-generated Swagger/OpenAPI documentation
 
@@ -25,6 +26,7 @@ A simple Todo API built with FastAPI and SQLite.
 ├── app/
 │   ├── api/
 │   │   └── v1/
+│   │       ├── env_vars.py        # Environment variables endpoints
 │   │       ├── health.py          # Health check endpoint
 │   │       ├── router.py          # API router
 │   │       └── todos.py           # Todo CRUD endpoints
@@ -99,6 +101,10 @@ Interactive API documentation is available at:
 - `PATCH /api/v1/todos/{todo_id}` - Update a todo
 - `DELETE /api/v1/todos/{todo_id}` - Delete a todo
 
+### Environment Variables Endpoints
+
+- `GET /api/v1/env/content` - Get the value of the CONTENT environment variable
+
 ## Example Usage
 
 ### Create a Todo
@@ -143,6 +149,19 @@ curl -X 'PATCH' \
 curl -X 'DELETE' 'http://localhost:8000/api/v1/todos/1'
 ```
 
+### Get CONTENT Environment Variable
+
+```bash
+curl -X 'GET' 'http://localhost:8000/api/v1/env/content'
+```
+
+To set the environment variable before running the application:
+
+```bash
+export CONTENT="Your content here"
+uvicorn main:app --host 0.0.0.0 --port 8000 --reload
+```
+
 ## License
 
 This project is licensed under the MIT License.

app/api/v1/env_vars.py

@@ -0,0 +1,33 @@
+import os
+from typing import Dict
+
+from fastapi import APIRouter, HTTPException, status
+
+router = APIRouter()
+
+
+@router.get(
+    "/env/content",
+    response_model=Dict[str, str],
+    summary="Get content from CONTENT environment variable",
+    description="Returns the value of the CONTENT environment variable"
+)
+def get_content_env_var():
+    """
+    Retrieve the value of the CONTENT environment variable.
+    
+    Returns:
+        dict: A dictionary containing the CONTENT environment variable value
+        
+    Raises:
+        HTTPException: If the CONTENT environment variable is not set
+    """
+    content_value = os.environ.get("CONTENT")
+    
+    if content_value is None:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="CONTENT environment variable is not set"
+        )
+        
+    return {"content": content_value}

app/api/v1/router.py

@@ -1,8 +1,9 @@
 from fastapi import APIRouter
 
-from app.api.v1 import health, todos
+from app.api.v1 import env_vars, health, todos
 
 api_router = APIRouter()
 
 api_router.include_router(health.router, tags=["health"])
-api_router.include_router(todos.router, prefix="/todos", tags=["todos"])
+api_router.include_router(todos.router, prefix="/todos", tags=["todos"])
+api_router.include_router(env_vars.router, tags=["environment"])