fix: friendly 502 handling, 2 uvicorn workers, file bundle cache (0.20.18)

backend/app/services/rdp_bundle_delivery.py

@@ -1,26 +1,19 @@
-"""Short-lived in-memory RDP agent bundles for WinRM clients to download."""
+"""Short-lived RDP agent bundles for WinRM clients to download."""
 
 from __future__ import annotations
 
 import io
+import re
 import secrets
 import time
 import zipfile
 from pathlib import Path
-from threading import Lock
 
-TTL_SECONDS = 600
 _UTF8_BOM = b"\xef\xbb\xbf"
 _BOM_SUFFIXES = {".ps1", ".txt"}
-
+_TOKEN_RE = re.compile(r"^[A-Za-z0-9_-]{16,128}$")
-_lock = Lock()
+TTL_SECONDS = 600
-_entries: dict[str, tuple[bytes, float]] = {}
+BUNDLE_DIR = Path("/tmp/sac-rdp-bundles")
-
-
-def _prune_expired(now: float) -> None:
-    expired = [token for token, (_, expires_at) in _entries.items() if expires_at <= now]
-    for token in expired:
-        _entries.pop(token, None)
 
 
 def _bundle_file_bytes(path: Path) -> bytes:
@@ -43,27 +36,34 @@ def build_rdp_bundle_zip(repo_dir: Path, filenames: tuple[str, ...]) -> bytes:
     return buffer.getvalue()
 
 
+def _prune_expired_bundles(now: float | None = None) -> None:
+    if not BUNDLE_DIR.is_dir():
+        return
+    cutoff = (now or time.time()) - TTL_SECONDS
+    for path in BUNDLE_DIR.glob("*.zip"):
+        try:
+            if path.stat().st_mtime < cutoff:
+                path.unlink(missing_ok=True)
+        except OSError:
+            continue
+
+
 def register_rdp_bundle_zip(zip_bytes: bytes) -> str:
     token = secrets.token_urlsafe(32)
-    expires_at = time.time() + TTL_SECONDS
+    BUNDLE_DIR.mkdir(parents=True, exist_ok=True)
-    with _lock:
+    _prune_expired_bundles()
-        _prune_expired(time.time())
+    (BUNDLE_DIR / f"{token}.zip").write_bytes(zip_bytes)
-        _entries[token] = (zip_bytes, expires_at)
     return token
 
 
 def get_rdp_bundle_zip(token: str) -> bytes | None:
     text = (token or "").strip()
-    if not text:
+    if not _TOKEN_RE.fullmatch(text):
         return None
-    now = time.time()
+    path = BUNDLE_DIR / f"{text}.zip"
-    with _lock:
+    if not path.is_file():
-        _prune_expired(now)
+        return None
-        entry = _entries.get(text)
+    if time.time() - path.stat().st_mtime > TTL_SECONDS:
-        if entry is None:
+        path.unlink(missing_ok=True)
-            return None
+        return None
-        data, expires_at = entry
+    return path.read_bytes()
-        if expires_at <= now:
-            _entries.pop(text, None)
-            return None
-        return data

backend/app/version.py

@@ -1,5 +1,5 @@
 """Единый источник версии SAC (API, health, логи, OpenAPI)."""
 
 APP_NAME = "Security Alert Center"
-APP_VERSION = "0.20.17"
+APP_VERSION = "0.20.18"
 APP_VERSION_LABEL = f"{APP_NAME} v.{APP_VERSION}"

backend/tests/test_winrm_connect.py

@@ -70,7 +70,8 @@ def test_custom_deploy_script_escapes_single_quotes():
     assert "O''Brien" in script
 
 
-def test_rdp_bundle_zip_adds_utf8_bom_for_ps1(tmp_path: Path):
+def test_rdp_bundle_zip_adds_utf8_bom_for_ps1(tmp_path: Path, monkeypatch):
+    monkeypatch.setattr("app.services.rdp_bundle_delivery.BUNDLE_DIR", tmp_path)
     repo = tmp_path / "repo"
     repo.mkdir()
     (repo / "Deploy-LoginMonitor.ps1").write_text("# test", encoding="utf-8")
@@ -83,7 +84,8 @@ def test_rdp_bundle_zip_adds_utf8_bom_for_ps1(tmp_path: Path):
     assert data.startswith(_UTF8_BOM)
 
 
-def test_rdp_bundle_zip_roundtrip(tmp_path: Path):
+def test_rdp_bundle_zip_roundtrip(tmp_path: Path, monkeypatch):
+    monkeypatch.setattr("app.services.rdp_bundle_delivery.BUNDLE_DIR", tmp_path)
     repo = tmp_path / "repo"
     repo.mkdir()
     for name in RDP_BUNDLE_REQUIRED:

deploy/sac-deploy.sh

@@ -104,7 +104,7 @@ print('db: OK')
 \"
 " || die "PostgreSQL: проверьте DATABASE_URL в ${CONFIG_FILE} и systemctl status postgresql"
 
-log "systemctl restart ${SERVICE_NAME}"
+log "systemctl restart ${SERVICE_NAME} (краткий 502 в UI возможен ~10 с)"
 systemctl restart "${SERVICE_NAME}"
 systemctl is-active --quiet "${SERVICE_NAME}" || die "${SERVICE_NAME} не active"
 

deploy/systemd/sac-api.service

@@ -13,7 +13,7 @@ WorkingDirectory=/opt/security-alert-center/backend
 # Конфиг читает само приложение (pydantic), не systemd — иначе ломаются пароли с #, $ и т.д.
 Environment=SAC_CONFIG_FILE=/opt/security-alert-center/config/sac-api.env
 Environment=PYTHONPATH=/opt/security-alert-center/backend
-ExecStart=/opt/security-alert-center/backend/.venv/bin/uvicorn app.main:app --host 127.0.0.1 --port 8000 --timeout-graceful-shutdown 10
+ExecStart=/opt/security-alert-center/backend/.venv/bin/uvicorn app.main:app --host 127.0.0.1 --port 8000 --workers 2 --timeout-graceful-shutdown 30
 Restart=on-failure
 RestartSec=5
 TimeoutStopSec=20

frontend/src/api.ts

@@ -62,20 +62,20 @@ export async function apiFetch<T>(path: string, init: RequestInit = {}): Promise
       clearToken();
       redirectToErrorPage(401);
     }
-    throw new ApiError(parseApiError(text) || "Unauthorized", 401);
+    throw new ApiError(parseApiError(text, 401) || "Unauthorized", 401);
   }
   if (res.status === 403) {
     if (hadToken) {
       redirectToErrorPage(403);
     }
-    throw new ApiError(parseApiError(text) || "Forbidden", 403);
+    throw new ApiError(parseApiError(text, 403) || "Forbidden", 403);
   }
   if (res.status === 429) {
     redirectToErrorPage(429);
-    throw new ApiError(parseApiError(text) || "Too many requests", 429);
+    throw new ApiError(parseApiError(text, 429) || "Too many requests", 429);
   }
   if (!res.ok) {
-    throw new ApiError(parseApiError(text) || res.statusText, res.status);
+    throw new ApiError(parseApiError(text, res.status) || res.statusText, res.status);
   }
   if (!text) {
     return undefined as T;
@@ -99,8 +99,23 @@ export function fetchMe(): Promise<MeResponse> {
   return apiFetch<MeResponse>("/api/v1/auth/me");
 }
 
-export function parseApiError(text: string): string {
+export function parseApiError(text: string, status?: number): string {
+  if (status === 502 || status === 503 || status === 504) {
+    if (/<title>\s*502 Bad Gateway/i.test(text) || /502 Bad Gateway/i.test(text)) {
+      return "Сервер SAC временно недоступен (перезапуск или обновление). Подождите 5–10 секунд и обновите страницу.";
+    }
+    if (/<title>\s*503 Service Unavailable/i.test(text) || /503 Service Unavailable/i.test(text)) {
+      return "SAC временно перегружен. Повторите запрос через несколько секунд.";
+    }
+    if (/<title>\s*504 Gateway Time-out/i.test(text) || /504 Gateway Time-out/i.test(text)) {
+      return "Превышено время ожидания ответа SAC. Долгая операция могла ещё выполняться на сервере.";
+    }
+    return "Временная ошибка шлюза SAC. Обновите страницу.";
+  }
   if (!text) return "";
+  if (text.trimStart().startsWith("<")) {
+    return status ? `Ошибка HTTP ${status}` : "Ошибка сервера";
+  }
   try {
     const data = JSON.parse(text) as { detail?: string | Array<{ msg?: string }> };
     if (typeof data.detail === "string") return data.detail;

frontend/src/version.ts

@@ -1,4 +1,4 @@
 /** Fallback до загрузки /health; при релизе держите в sync с backend/app/version.py */
 export const APP_NAME = "Security Alert Center";
-export const APP_VERSION = "0.20.17";
+export const APP_VERSION = "0.20.18";
 export const APP_VERSION_LABEL = `${APP_NAME} v.${APP_VERSION}`;

frontend/src/views/HostsView.vue

@@ -101,6 +101,7 @@ import { useRoute, useRouter } from "vue-router";
 import { useSacLiveEventStream } from "../composables/useSacLiveEventStream";
 import {
   apiFetch,
+  ApiError,
   fetchHost,
   fetchRecentEvents,
   type HostDetail,
@@ -304,7 +305,7 @@ const sortedItems = computed(() => {
   return items;
 });
 
-async function loadHosts() {
+async function loadHosts(retry = 0) {
   loading.value = true;
   error.value = "";
   try {
@@ -314,6 +315,11 @@ async function loadHosts() {
     if (agentStatusFilter.value) params.set("agent_status", agentStatusFilter.value);
     data.value = await apiFetch<HostListResponse>(`/api/v1/hosts?${params}`);
   } catch (e) {
+    const status = e instanceof ApiError ? e.status : 0;
+    if (retry < 2 && (status === 502 || status === 503)) {
+      await new Promise((resolve) => window.setTimeout(resolve, 2500));
+      return loadHosts(retry + 1);
+    }
     error.value = e instanceof Error ? e.message : "Ошибка";
   } finally {
     loading.value = false;