ai-kefu-admin/tests/test_host_routing.py

# Task 7: Host 中间件租户路由——纯 ASGI(http+websocket 双覆盖)。
#
# 本文件的存在意义(前序审查实证过的坑): 若中间件走了 BaseHTTPMiddleware
# (@app.middleware("http")),WS 请求会整个绕过租户解析落 get_runtime 兜底,
# auto 域名的 WS 流量静默写进 jiancai 库(串库不崩溃,极难发现)。
# test_ws_routes_to_correct_tenant_db 用双库断言钉死这条红线。

import json
import shutil
from types import SimpleNamespace

import pytest
from starlette.websockets import WebSocketDisconnect

from app.main import app
from app.platform.host_middleware import TenantHostMiddleware
from app.platform.registry import TenantRegistry
from tests.conftest import (
    AUTO_HOST,
    JIANCAI_HOST,
    NOPE_HOST,
    SEED_DIR,
    app_test_client,
    build_app,
)


# ---- 中间件挂载顺序守护 -------------------------------------------------------


def test_tenant_middleware_is_outermost_user_middleware():
    # add_middleware 后加者居 user_middleware[0] = 最外层。租户解析必须
    # 先于一切用户中间件(里层中间件/路由才读得到 state.tenant)——未来
    # 新中间件若更晚 add_middleware 插到租户中间件外层,此测试即红。
    assert app.user_middleware[0].cls is TenantHostMiddleware


# ---- 平台级豁免 -------------------------------------------------------------


def test_health_served_for_any_host(app_client):
    # /health 在任何 Host 下可达(部署健康检查 curl 127.0.0.1:8018,
    # Host 是 IP:端口,对 registry 必然未知)
    assert app_client.get("/health").status_code == 200
    r = app_client.get("/health", headers={"host": NOPE_HOST})
    assert r.status_code == 200


def test_health_exemption_is_exact_match(app_client):
    # 精确 == "/health",/healthxxx 不豁免:未知 Host 由中间件(而非路由)
    # 拒绝——text/plain 的 PlainTextResponse 区别于路由 404 的 JSON body
    r = app_client.get("/healthxxx", headers={"host": NOPE_HOST})
    assert r.status_code == 404
    assert r.headers["content-type"].startswith("text/plain")


# ---- 未知 Host --------------------------------------------------------------


def test_unknown_host_gets_404(app_client):
    r = app_client.get("/api/chat/session", headers={"host": NOPE_HOST})
    assert r.status_code == 404


def test_unknown_host_ws_rejected_with_1008(app_client):
    # 探针实证: 服务器未 accept 直接 close 时,TestClient 在 __enter__ 即抛
    # WebSocketDisconnect,code/reason 保留——这就是断言方式
    with pytest.raises(WebSocketDisconnect) as ei:
        with app_client.websocket_connect("/ws/chat", headers={"host": NOPE_HOST}):
            pass  # pragma: no cover — 未 accept 即 close,进不来
    assert ei.value.code == 1008


# ---- 停用租户 ---------------------------------------------------------------


@pytest.fixture
def disabled_client(tmp_path):
    """jiancai 停用版 app_client: 拷 seed 到 tmp、改 status 再加载。

    加载前改盘(而非 registry_reload): 无需跨事件循环碰 registry 锁,
    最简;reload 语义本身已被 Task 5a 的测试钉过,此处不重复走。"""
    seed = tmp_path / "seed"
    shutil.copytree(SEED_DIR, seed)
    tenant_json = seed / "jiancai" / "tenant.json"
    data = json.loads(tenant_json.read_text(encoding="utf-8"))
    data["status"] = "disabled"
    tenant_json.write_text(json.dumps(data, ensure_ascii=False), encoding="utf-8")
    a = build_app(seed, tmp_path / "data")
    with app_test_client(a, f"http://{JIANCAI_HOST}", tmp_path) as c:
        yield c


def test_disabled_tenant_gets_pause_page(disabled_client):
    r = disabled_client.get("/api/chat/session")
    assert r.status_code == 503
    assert "暂停" in r.text
    # 中性页: 不暴露租户 slug/域名
    assert "jiancai" not in r.text.lower()
    assert JIANCAI_HOST not in r.text


def test_disabled_tenant_ws_rejected_with_1013(disabled_client):
    with pytest.raises(WebSocketDisconnect) as ei:
        with disabled_client.websocket_connect("/ws/chat"):
            pass  # pragma: no cover
    assert ei.value.code == 1013


# ---- 租户正确性(防串库红线) --------------------------------------------------


def test_default_host_routes_to_jiancai(app_client):
    # app_client 不带 host 头 → base_url 的 jiancai 域(既有全量测试的语义)
    r = app_client.post("/api/chat/session", json={})
    assert r.status_code == 200


def test_ws_routes_to_correct_tenant_db(app_client, tmp_path):
    """WS 经 auto 域名连接 → 会话必须落在 auto 租户库。

    三层断言:
    1. 文件级——此刻只碰过 auto(WS 用显式 host;lifespan 清扫因无 db
       文件而跳过),auto.db 已懒建而 jiancai.db 从未创建;
    2. REST resume 经 auto 域名命中同一 sid(is_new=False 且回原 sid);
    3. 同一 sid 经 jiancai 域名(base_url 默认)不可见——resume miss 落
       is_new=True(新建了另一个会话),证明 jiancai 库里没有它。
    (经 /api/chat/session 的 resume 探测而非 /messages: 后者只放行
    app-source 会话,WS 造的 standalone 会话两库都会 404,区分不了;
    resume 探测不触发 AI 调用。)"""
    with app_client.websocket_connect(
            "/ws/chat", headers={"host": AUTO_HOST}) as ws:
        ws.send_text(json.dumps({"source": "standalone"}))
        init = ws.receive_json()
        assert init["type"] == "init"
        sid = init["session_id"]

    # 1. 文件级(jiancai 还没被任何请求 resolve 过)
    assert (tmp_path / "auto.db").exists()
    assert not (tmp_path / "jiancai.db").exists()

    # 2. auto 库命中
    r_auto = app_client.post(
        "/api/chat/session", json={"session_id": sid},
        headers={"host": AUTO_HOST})
    assert r_auto.status_code == 200
    assert r_auto.json()["is_new"] is False
    assert r_auto.json()["session_id"] == sid

    # 3. jiancai 库没有(miss → 新建,is_new=True、sid 不同)
    r_jc = app_client.post("/api/chat/session", json={"session_id": sid})
    assert r_jc.status_code == 200
    assert r_jc.json()["is_new"] is True
    assert r_jc.json()["session_id"] != sid


# ---- 路径前缀模式(/t/<slug>/,spec 2026-10-19 §3) ----------------------------


class TestPathPrefixRouting:
    """路径前缀与 Host 模式共存:优先级 平台豁免 → 路径前缀 → Host 解析。

    Host 用未知值(NOPE_HOST)——路径命中即证明解析先于 Host;反向用已知
    AUTO_HOST(Host 说是 auto 租户)+ /t/jiancai/ 断言路径优先(spec §2)。"""

    def test_聊天页_t_slug_根路径(self, app_client):
        r = app_client.get("/t/jiancai/", headers={"host": NOPE_HOST})
        assert r.status_code == 200
        assert "chat" in r.text.lower()

    def test_静态与公开API全链(self, app_client):
        r = app_client.get("/t/jiancai/static/widget.js",
                           headers={"host": NOPE_HOST})
        assert r.status_code == 200
        r = app_client.get("/t/jiancai/api/public/brand",
                           headers={"host": NOPE_HOST})
        assert r.status_code == 200
        assert r.json()["slug"] == "jiancai"

    def test_无尾斜杠不剥离_走Host解析404(self, app_client):
        # 只断言未知 Host 形态:/t/x 在 Host 模式下本就无路由(/ 才是聊天页),
        # 若带已知 Host 断言 200 会诱导实现去剥离无斜杠形态——违反 spec §3.2
        r = app_client.get("/t/jiancai", headers={"host": NOPE_HOST})
        assert r.status_code == 404
        # 已知 Host 的正常根路径(Host 模式对照,不受路径模式影响)
        assert app_client.get("/", headers={"host": JIANCAI_HOST}).status_code == 200

    def test_编码slug拒绝(self, app_client):
        # %61uto 解码后即合法 slug auto——解码形态判不出编码,raw_path 直判
        # 为准(spec §3.1);不匹配 → 落 Host 解析(未知 Host)→ 404
        r = app_client.get("/t/%61uto/", headers={"host": NOPE_HOST})
        assert r.status_code == 404

    def test_大写与点号拒绝(self, app_client):
        # 不能用 /t/../:httpx 客户端侧归一点段到不了中间件——用字面点号
        assert app_client.get(
            "/t/Jiancai/", headers={"host": NOPE_HOST}).status_code == 404
        assert app_client.get(
            "/t/jian.cai/", headers={"host": NOPE_HOST}).status_code == 404

    def test_未知slug_404(self, app_client):
        r = app_client.get("/t/no-such/x", headers={"host": NOPE_HOST})
        assert r.status_code == 404

    def test_停用租户_503(self, disabled_client):
        # 路径模式同样吃 TenantDisabledError → 503 中性暂停页(与 Host 模式
        # 同语义;此处 Host 头无关紧要,解析根本不走到 Host)
        r = disabled_client.get("/t/jiancai/api/chat/session",
                                headers={"host": NOPE_HOST})
        assert r.status_code == 503
        assert "暂停" in r.text

    def test_site参数覆盖在路径模式生效(self, app_client):
        # jiancai 的 es 站点(空域名站点):默认取首站点 main,?site= 覆盖
        # 链路既有(spec §3.4)——brand title 取站点覆盖值即证覆盖真生效
        r = app_client.get("/t/jiancai/api/public/brand?site=es",
                           headers={"host": NOPE_HOST})
        assert r.status_code == 200
        assert r.json()["title"] == "HESUPIPE Soporte"

    def test_平台豁免优先级不受影响(self, app_client):
        # /health 豁免不受路径模式影响;/t/x/api/platform/... 剥离后命中
        # 平台路由属 by design(spec §3.5)——认证守护兜底,未带凭据
        # 401/422/429(POST 空 body → 422)
        assert app_client.get("/health", headers={"host": NOPE_HOST}).status_code == 200
        r = app_client.post("/t/jiancai/api/platform/auth/login",
                            headers={"host": NOPE_HOST})
        assert r.status_code in (401, 422, 429)

    async def test_orig_path与路径改写直接钉位(self, tmp_path):
        """直接构造 ASGI scope 断言改写(不经 httpx 归一化):capture app
        记录中间件改写后的 path/raw_path/state["orig_path"]——spec §3.2/
        §3.3 的直证。registry 手工装配,用完 dispose_all(Windows 文件锁)。"""
        reg = TenantRegistry.load_from_dir(SEED_DIR, data_dir=tmp_path)
        captured = {}

        async def capture_app(scope, receive, send):
            state = scope.get("state") or {}
            captured.update(
                path=scope.get("path"),
                raw_path=scope.get("raw_path"),
                orig_path=state.get("orig_path"),
                tenant=(state.get("tenant").config.slug
                        if state.get("tenant") else None),
                site=state.get("site").slug if state.get("site") else None,
            )

        async def noop_receive():
            return {"type": "http.request", "body": b"", "more_body": False}

        async def noop_send(message):
            pass

        def make_scope(rtype, path, raw_path):
            return {
                "type": rtype, "asgi": {"version": "3.0"},
                "http_version": "1.1", "method": "GET", "scheme": "http",
                "path": path, "raw_path": raw_path, "query_string": b"",
                "headers": [(b"host", b"unknown.example")],
                "client": ("127.0.0.1", 12345),
                "app": SimpleNamespace(state=SimpleNamespace(registry=reg)),
            }

        mw = TenantHostMiddleware(capture_app)
        try:
            # http:基本剥离 + orig_path 留痕 + state 写入
            await mw(make_scope("http", "/t/jiancai/static/widget.js",
                                b"/t/jiancai/static/widget.js"),
                     noop_receive, noop_send)
            assert captured["path"] == "/static/widget.js"
            assert captured["raw_path"] == b"/static/widget.js"
            assert captured["orig_path"] == "/t/jiancai/static/widget.js"
            assert captured["tenant"] == "jiancai"
            assert captured["site"] == "main"

            # raw_path 重编码而非长度截断(spec §3.2):%2F 解码成 "/" 后,
            # 截断会得 b"/a%2Fb",重算得 b"/a/b"
            await mw(make_scope("http", "/t/jiancai/a/b",
                                b"/t/jiancai/a%2Fb"),
                     noop_receive, noop_send)
            assert captured["path"] == "/a/b"
            assert captured["raw_path"] == b"/a/b"

            # 根路径形态:/t/jiancai/ → "/"(剥空兜底)
            await mw(make_scope("http", "/t/jiancai/", b"/t/jiancai/"),
                     noop_receive, noop_send)
            assert captured["path"] == "/"
            assert captured["raw_path"] == b"/"

            # websocket scope 同构改写(不必真握手,capture 收到即证)
            await mw(make_scope("websocket", "/t/jiancai/ws/chat",
                                b"/t/jiancai/ws/chat"),
                     noop_receive, noop_send)
            assert captured["path"] == "/ws/chat"
            assert captured["orig_path"] == "/t/jiancai/ws/chat"
        finally:
            await reg.dispose_all()

    def test_WS路径模式握手(self, app_client):
        # WS 握手后服务端先等客户端 init 消息(chat.py:48)——先发
        # standalone 再收 init;session_id 即证路径模式 WS 全链打通
        with app_client.websocket_connect(
                "/t/jiancai/ws/chat", headers={"host": NOPE_HOST}) as ws:
            ws.send_text(json.dumps({"source": "standalone"}))
            data = ws.receive_json()
            assert data["type"] == "init"
            assert "session_id" in data

    def test_WS未知slug拒绝(self, app_client):
        with pytest.raises(WebSocketDisconnect) as ei:
            with app_client.websocket_connect(
                    "/t/no-such/ws/chat", headers={"host": NOPE_HOST}):
                pass  # pragma: no cover — 未 accept 即 close,进不来
        assert ei.value.code == 1008

    def test_Host模式回归_路径优先(self, app_client):
        # 已知 Host(AUTO_HOST 属 auto 租户)+ /t/jiancai/ → 出 jiancai
        # 而非 auto,证明路径前缀解析赢过 Host 解析(spec §2 优先级)
        r = app_client.get("/t/jiancai/api/public/brand",
                           headers={"host": AUTO_HOST})
        assert r.status_code == 200
        assert r.json()["slug"] == "jiancai"