fix: 安全性与代码质量加固（异常保护、外键级联、竞态修复、优雅关机）

src/server/app.ts

@@ -218,7 +218,12 @@ function createTargetsResponse(store: ProbeStore): TargetStatus[] {
 function mapCheckResult(row: StoredCheckResult): CheckResult {
   let failure: CheckFailure | null = null;
   if (row.failure) {
-    failure = JSON.parse(row.failure) as CheckFailure;
+    try {
+      failure = JSON.parse(row.failure) as CheckFailure;
+    } catch {
+      console.warn(`无法解析 failure 数据: target_id=${row.target_id}, timestamp=${row.timestamp}`);
+      failure = null;
+    }
   }
 
   return {

src/server/checker/config-loader.ts

@@ -9,7 +9,7 @@ import type {
   ResolvedCommandTarget,
   ResolvedHttpTarget,
   ResolvedTarget,
-  RuntimeConfig,
+  EngineRuntimeConfig,
   TargetConfig,
   TargetType,
 } from "./types";
@@ -77,7 +77,7 @@ export async function loadConfig(configPath: string): Promise<ResolvedConfig> {
   return { host, port, dataDir, configDir, maxConcurrentChecks, targets };
 }
 
-function validateRuntime(runtime: RuntimeConfig): number {
+function validateRuntime(runtime: EngineRuntimeConfig): number {
   if (runtime.maxConcurrentChecks === undefined) return DEFAULT_MAX_CONCURRENT_CHECKS;
 
   if (

src/server/checker/engine.ts

@@ -15,7 +15,7 @@ export class ProbeEngine {
   constructor(store: ProbeStore, targets: ResolvedTarget[], maxConcurrentChecks?: number) {
     this.store = store;
     this.targets = targets;
-    this.maxConcurrentChecks = maxConcurrentChecks ?? 10;
+    this.maxConcurrentChecks = maxConcurrentChecks ?? 20;
     this.refreshCache();
   }
 
@@ -86,6 +86,8 @@ export class ProbeEngine {
     for (const result of results) {
       if (result.status === "fulfilled") {
         this.writeResult(result.value);
+      } else {
+        console.warn("探针执行失败:", result.reason);
       }
     }
   }

src/server/checker/size.ts

@@ -16,7 +16,3 @@ export function parseSize(value: string | number): number {
   if (unit === "MB") return num * 1024 * 1024;
   return num * 1024 * 1024 * 1024;
 }
-
-export const DEFAULT_MAX_BODY_BYTES = parseSize("100MB");
-export const DEFAULT_MAX_OUTPUT_BYTES = parseSize("100MB");
-export const DEFAULT_MAX_CONCURRENT_CHECKS = 20;

src/server/checker/store.ts

@@ -26,7 +26,7 @@ CREATE TABLE IF NOT EXISTS check_results (
   duration_ms REAL,
   status_detail TEXT,
   failure TEXT,
-  FOREIGN KEY (target_id) REFERENCES targets(id)
+  FOREIGN KEY (target_id) REFERENCES targets(id) ON DELETE CASCADE
 )
 `;
 
@@ -43,6 +43,7 @@ export class ProbeStore {
     ensureDir(dirname(dbPath));
     this.db = new Database(dbPath, { create: true });
     this.db.run("PRAGMA journal_mode = WAL");
+    this.db.run("PRAGMA foreign_keys = ON");
     this.db.run(CREATE_TARGETS_TABLE);
     this.db.run(CREATE_CHECK_RESULTS_TABLE);
     this.db.run(CREATE_INDEX);

src/server/checker/types.ts

@@ -2,7 +2,7 @@ export type TargetType = "http" | "command";
 
 export interface ProbeConfig {
   server?: ServerConfig;
-  runtime?: RuntimeConfig;
+  runtime?: EngineRuntimeConfig;
   defaults?: DefaultsConfig;
   targets: TargetConfig[];
 }
@@ -13,7 +13,7 @@ export interface ServerConfig {
   dataDir?: string;
 }
 
-export interface RuntimeConfig {
+export interface EngineRuntimeConfig {
   maxConcurrentChecks?: number;
 }
 

src/server/dev.ts

@@ -14,6 +14,14 @@ async function main() {
   const engine = new ProbeEngine(store, config.targets, config.maxConcurrentChecks);
   engine.start();
 
+  const shutdown = () => {
+    engine.stop();
+    store.close();
+    process.exit(0);
+  };
+  process.on("SIGINT", shutdown);
+  process.on("SIGTERM", shutdown);
+
   startServer({
     config: { host: config.host, port: config.port },
     mode: "development",