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99 lines
3.6 KiB
Python
99 lines
3.6 KiB
Python
"""Small real HTTP system used by the Experiment 5-8 campaign.
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The service intentionally exposes ordinary order, refund, and inventory
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endpoints. The buggy/fixed distinction lives in the orchestrator under test:
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the buggy orchestrator skips a required endpoint and mishandles an inventory
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timeout, while the fixed orchestrator makes the required calls and degrades.
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"""
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from __future__ import annotations
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import argparse
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import json
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import time
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from http.server import BaseHTTPRequestHandler, ThreadingHTTPServer
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from urllib.parse import parse_qs, urlparse
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class Handler(BaseHTTPRequestHandler):
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server_version = "Experiment58HTTP/1.0"
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def log_message(self, fmt: str, *args: object) -> None:
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print(
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json.dumps(
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{
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"client": self.client_address[0],
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"message": fmt % args,
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"time": time.time(),
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},
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ensure_ascii=False,
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),
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flush=True,
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)
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def _json(self, status: int, value: object) -> None:
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raw = json.dumps(value, ensure_ascii=False).encode("utf-8")
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self.send_response(status)
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self.send_header("content-type", "application/json; charset=utf-8")
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self.send_header("content-length", str(len(raw)))
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self.end_headers()
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try:
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self.wfile.write(raw)
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except BrokenPipeError:
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# A timed-out client is an expected part of the observed buggy run.
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pass
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def _body(self) -> dict[str, object]:
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length = int(self.headers.get("content-length") or 0)
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if not length:
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return {}
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value = json.loads(self.rfile.read(length))
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return value if isinstance(value, dict) else {}
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def do_GET(self) -> None: # noqa: N802 - BaseHTTPRequestHandler contract
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parsed = urlparse(self.path)
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if parsed.path == "/health":
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self._json(200, {"ok": True})
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return
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if parsed.path.startswith("/orders/"):
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order_id = parsed.path.rsplit("/", 1)[-1]
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self._json(200, {"order_id": order_id, "status": "paid", "sku": "SKU-42"})
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return
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if parsed.path.startswith("/inventory/"):
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sku = parsed.path.rsplit("/", 1)[-1]
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degraded = parse_qs(parsed.query).get("degraded", ["0"])[0] == "1"
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if degraded:
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self._json(200, {"sku": sku, "stock": 12, "source": "cache", "degraded": True})
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else:
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# Longer than the campaign's real client deadline.
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time.sleep(0.8)
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self._json(200, {"sku": sku, "stock": 12, "source": "origin", "degraded": False})
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return
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self._json(404, {"error": "not_found"})
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def do_POST(self) -> None: # noqa: N802 - BaseHTTPRequestHandler contract
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body = self._body()
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if self.path == "/refund/eligibility":
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self._json(200, {"order_id": body.get("order_id"), "eligible": True})
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return
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if self.path == "/refund/process":
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self._json(200, {"order_id": body.get("order_id"), "refund_id": "RF-LIVE-1"})
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return
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if self.path == "/notifications":
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self._json(200, {"sent": True, "status": body.get("status")})
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return
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self._json(404, {"error": "not_found"})
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def main() -> None:
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parser = argparse.ArgumentParser()
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parser.add_argument("--port", type=int, required=True)
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args = parser.parse_args()
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server = ThreadingHTTPServer(("127.0.0.1", args.port), Handler)
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print(json.dumps({"listening": args.port}), flush=True)
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server.serve_forever()
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if __name__ == "__main__":
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main()
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