Files
state-hub/api/main.py

112 lines
3.8 KiB
Python

import hashlib
import os
from contextlib import asynccontextmanager
from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from starlette.middleware.base import BaseHTTPMiddleware
from starlette.requests import Request
from starlette.responses import Response as StarletteResponse
from api.database import engine
from api.events import shutdown_publisher
from api.routers import decisions, extension_points, progress, state, tasks, technical_debt, topics, workstreams, workstream_dependencies
from api.routers import domains, repos, contributions, sbom, policy, domain_goals, repo_goals, messages, capability_requests, tpsc
from api.routers import token_events
from api.routers import interface_changes
from api.routers import flows
from api.routers import recently_on_scope
from api.routers import reconciliation
class ETagMiddleware(BaseHTTPMiddleware):
"""Add ETag + conditional-GET (304) support to all JSON GET responses."""
async def dispatch(self, request: Request, call_next):
response = await call_next(request)
if request.method != "GET":
return response
if "application/json" not in response.headers.get("content-type", ""):
return response
body_parts = []
async for chunk in response.body_iterator:
body_parts.append(chunk)
body = b"".join(body_parts)
etag = '"' + hashlib.md5(body, usedforsecurity=False).hexdigest() + '"'
if request.headers.get("if-none-match") == etag:
return StarletteResponse(
status_code=304,
headers={"ETag": etag, "Cache-Control": "no-cache"},
)
headers = {k: v for k, v in response.headers.items() if k.lower() != "content-length"}
headers["ETag"] = etag
if not any(k.lower() == "cache-control" for k in headers):
headers["Cache-Control"] = "no-cache"
return StarletteResponse(
content=body,
status_code=response.status_code,
headers=headers,
media_type=response.media_type,
)
@asynccontextmanager
async def lifespan(app: FastAPI):
yield
await shutdown_publisher()
await engine.dispose()
app = FastAPI(
title="Custodian State Hub",
description="Local-first state API for the Custodian agent system.",
version="0.6.0",
lifespan=lifespan,
)
_cors_env = os.getenv("CORS_ORIGINS", "http://localhost:3000,http://127.0.0.1:3000")
_cors_origins = [o.strip() for o in _cors_env.split(",") if o.strip()]
app.add_middleware(ETagMiddleware)
app.add_middleware(
CORSMiddleware,
allow_origins=_cors_origins,
allow_methods=["GET", "POST", "PATCH", "DELETE", "PUT"],
allow_headers=["Content-Type", "If-None-Match"],
expose_headers=["ETag"],
)
app.include_router(domains.router)
app.include_router(recently_on_scope.hourly_router)
app.include_router(recently_on_scope.router)
app.include_router(repos.router)
app.include_router(topics.router)
app.include_router(workstreams.router)
app.include_router(workstream_dependencies.router)
app.include_router(tasks.router)
app.include_router(decisions.router)
app.include_router(extension_points.router)
app.include_router(technical_debt.router)
app.include_router(progress.router)
app.include_router(domain_goals.router)
app.include_router(repo_goals.router)
app.include_router(contributions.router)
app.include_router(sbom.router)
app.include_router(messages.router)
app.include_router(capability_requests.router)
app.include_router(tpsc.router)
app.include_router(token_events.router)
app.include_router(interface_changes.router)
app.include_router(flows.router)
app.include_router(reconciliation.router)
app.include_router(state.router)
app.include_router(policy.router)
@app.get("/", include_in_schema=False)
async def root():
return {"service": "state-hub", "docs": "/docs"}