claude
2684095e2f
Co-authored-by: claude <claude@jpaul.io> Co-committed-by: claude <claude@jpaul.io>
68 lines
2.5 KiB
Python
68 lines
2.5 KiB
Python
"""Minimal HTTP face for the tasks-app, so there is something long-running to *deploy*.
|
|
|
|
Standard library only — no pip install, so the container image stays tiny and the lab has no
|
|
dependencies to drift. It reuses the TaskList from tasks.py (Modules 1-2) unchanged.
|
|
|
|
Run it:
|
|
python serve.py # serves on http://localhost:8000
|
|
|
|
Endpoints:
|
|
GET /health -> {"status": "ok", "version": <APP_VERSION>} (200)
|
|
GET /tasks -> the current tasks as JSON
|
|
|
|
Two environment knobs make this realistic for the CD lab (config injected at run time, Module 17):
|
|
APP_VERSION what /health reports as the running version (set by deploy.sh to the commit SHA)
|
|
BREAK=1 force /health to return 500 — a stand-in for "this build starts but is broken",
|
|
used in Part D to trigger an automatic rollback.
|
|
"""
|
|
|
|
import json
|
|
import os
|
|
from http.server import BaseHTTPRequestHandler, ThreadingHTTPServer
|
|
from pathlib import Path
|
|
|
|
from tasks import Task, TaskList
|
|
|
|
STATE = Path(__file__).parent / "tasks.json"
|
|
PORT = int(os.environ.get("PORT", "8000"))
|
|
APP_VERSION = os.environ.get("APP_VERSION", "dev")
|
|
BREAK = os.environ.get("BREAK") == "1"
|
|
|
|
|
|
def load() -> TaskList:
|
|
if not STATE.exists():
|
|
return TaskList()
|
|
raw = json.loads(STATE.read_text())
|
|
return TaskList(tasks=[Task(**t) for t in raw])
|
|
|
|
|
|
class Handler(BaseHTTPRequestHandler):
|
|
def _send(self, code: int, payload: dict) -> None:
|
|
body = json.dumps(payload).encode()
|
|
self.send_response(code)
|
|
self.send_header("Content-Type", "application/json")
|
|
self.send_header("Content-Length", str(len(body)))
|
|
self.end_headers()
|
|
self.wfile.write(body)
|
|
|
|
def do_GET(self) -> None:
|
|
if self.path == "/health":
|
|
# A real health check would also confirm dependencies (db, etc.) are reachable.
|
|
if BREAK:
|
|
self._send(500, {"status": "unhealthy", "version": APP_VERSION})
|
|
else:
|
|
self._send(200, {"status": "ok", "version": APP_VERSION})
|
|
elif self.path == "/tasks":
|
|
tlist = load()
|
|
self._send(200, {"tasks": [t.__dict__ for t in tlist.tasks]})
|
|
else:
|
|
self._send(404, {"error": "not found"})
|
|
|
|
def log_message(self, *args) -> None: # keep the lab output clean
|
|
pass
|
|
|
|
|
|
if __name__ == "__main__":
|
|
print(f"serving tasks-app version={APP_VERSION} on http://localhost:{PORT}")
|
|
ThreadingHTTPServer(("0.0.0.0", PORT), Handler).serve_forever()
|