修改api路径

app/api/fetcher/browser.ts

@@ -0,0 +1,71 @@
+import { chromium, type BrowserContext } from 'playwright'
+
+// A simple singleton manager for a persistent Chromium context with ref-counting.
+// Prevents concurrent tasks from closing the shared window prematurely.
+
+let contextPromise: Promise<BrowserContext> | null = null
+let context: BrowserContext | null = null
+let refCount = 0
+let idleCloseTimer: NodeJS.Timeout | null = null
+
+const USER_DATA_DIR = 'chrome-profile/douyin'
+const DEFAULT_OPTIONS = { headless: true } as const
+
+async function launchContext(): Promise<BrowserContext> {
+  const ctx = await chromium.launchPersistentContext(USER_DATA_DIR, DEFAULT_OPTIONS)
+  // When the context is closed externally, reset manager state
+  ctx.on('close', () => {
+    context = null
+    contextPromise = null
+    refCount = 0
+    if (idleCloseTimer) {
+      clearTimeout(idleCloseTimer)
+      idleCloseTimer = null
+    }
+  })
+  return ctx
+}
+
+export async function acquireBrowserContext(): Promise<BrowserContext> {
+  // Cancel any pending idle close if a new consumer arrives
+  if (idleCloseTimer) {
+    clearTimeout(idleCloseTimer)
+    idleCloseTimer = null
+  }
+
+  if (context) {
+    refCount += 1
+    return context
+  }
+
+  if (!contextPromise) {
+    contextPromise = launchContext()
+  }
+  context = await contextPromise
+  refCount += 1
+  return context
+}
+
+export async function releaseBrowserContext(options?: { idleMillis?: number }): Promise<void> {
+  const idleMillis = options?.idleMillis ?? 15_000
+  refCount = Math.max(0, refCount - 1)
+
+  if (refCount > 0 || !context) return
+
+  // Delay the close to allow bursty workloads to reuse the context
+  if (idleCloseTimer) {
+    clearTimeout(idleCloseTimer)
+    idleCloseTimer = null
+  }
+  idleCloseTimer = setTimeout(async () => {
+    try {
+      if (context && refCount === 0) {
+        await context.close()
+      }
+    } finally {
+      context = null
+      contextPromise = null
+      idleCloseTimer = null
+    }
+  }, idleMillis)
+}