core/workbench/api.py
Shay 8a24ebe726
feat(W-026): read-only workbench API (ADR-0160 Phase 1) (#292)
* feat(W-026): add read-only workbench API

* fix(workbench): harden read-only API review gaps
2026-05-26 10:16:35 -07:00

91 lines
4.2 KiB
Python

"""Small stdlib route layer for CORE Workbench W-026."""
from __future__ import annotations
import json
from dataclasses import dataclass
from typing import Any
from urllib.parse import parse_qs, unquote, urlparse
from workbench import readers
from workbench.readers import ArtifactTooLargeError
from workbench.schemas import error, ok
@dataclass(frozen=True, slots=True)
class ApiResponse:
status: int
payload: dict[str, Any]
class WorkbenchApi:
def handle(self, method: str, raw_path: str, body: bytes = b"") -> ApiResponse:
parsed = urlparse(raw_path)
path = parsed.path.rstrip("/") or "/"
query = parse_qs(parsed.query)
try:
return self._dispatch(method.upper(), path, query, body)
except json.JSONDecodeError as exc:
return ApiResponse(400, error("bad_request", "invalid JSON body", detail=str(exc)))
except ValueError as exc:
return ApiResponse(400, error("bad_request", str(exc)))
except FileNotFoundError as exc:
missing = str(exc) or "resource"
return ApiResponse(404, error("not_found", f"not found: {missing}"))
except ArtifactTooLargeError as exc:
return ApiResponse(413, error("read_error", str(exc)))
except OSError as exc:
return ApiResponse(500, error("read_error", str(exc)))
except Exception as exc: # noqa: BLE001 - API contract requires JSON errors.
return ApiResponse(500, error("runtime_unavailable", f"internal error: {exc}"))
def _dispatch(
self,
method: str,
path: str,
query: dict[str, list[str]],
body: bytes,
) -> ApiResponse:
if method == "GET" and path == "/health":
return ApiResponse(200, ok({"status": "ok"}))
if method == "GET" and path == "/runtime/status":
return ApiResponse(200, ok(readers.runtime_status()))
if method == "GET" and path == "/artifacts":
limit = int(query.get("limit", ["100"])[0])
return ApiResponse(200, ok({"items": readers.list_artifacts(limit=limit)}))
if method == "GET" and path.startswith("/artifacts/"):
artifact_id = unquote(path.removeprefix("/artifacts/"))
return ApiResponse(200, ok(readers.read_artifact(artifact_id)))
if method == "GET" and path == "/proposals":
return ApiResponse(200, ok({"items": readers.list_proposals()}))
if method == "GET" and path.startswith("/proposals/"):
proposal_id = unquote(path.removeprefix("/proposals/"))
return ApiResponse(200, ok(readers.read_proposal(proposal_id)))
if method == "GET" and path == "/evals":
return ApiResponse(200, ok({"lanes": readers.list_eval_lanes()}))
if method == "GET" and path.startswith("/evals/"):
lane = unquote(path.removeprefix("/evals/"))
return ApiResponse(200, ok(readers.read_eval_lane(lane)))
if method == "POST" and path == "/evals/run":
request = json.loads(body.decode("utf-8") or "{}")
if not isinstance(request, dict):
return ApiResponse(400, error("bad_request", "eval request must be an object"))
try:
result = readers.run_safe_eval_lane(
str(request.get("lane") or ""),
version=str(request.get("version") or "v1"),
split=str(request.get("split") or "public"),
)
except FileNotFoundError as exc:
return ApiResponse(404, error("not_found", str(exc)))
except ValueError as exc:
return ApiResponse(400, error("bad_request", str(exc)))
return ApiResponse(200, ok(result))
if method == "GET" and path.startswith("/trace/"):
return ApiResponse(404, error("not_found", "trace storage is not wired in W-026"))
if (
(method == "POST" and path == "/chat/turn")
or (method == "GET" and path.startswith("/replay/"))
):
return ApiResponse(501, error("unsupported", "route is deferred beyond W-026"))
return ApiResponse(404, error("not_found", f"route not found: {method} {path}"))