diff --git a/favicon_app/models/favicon.py b/favicon_app/models/favicon.py
index 819e6ef..ebde70c 100644
--- a/favicon_app/models/favicon.py
+++ b/favicon_app/models/favicon.py
@@ -360,5 +360,5 @@ _pattern_domain = re.compile(
 def failed_url_cache(_domain: str, _time: int):
     if _domain:
         _current_time = int(time.time())
-        if (not failed_urls[_domain]) or (_current_time <= failed_urls[_domain]):
+        if (not failed_urls.get(_domain)) or (_current_time <= failed_urls.get(_domain)):
             failed_urls[_domain] = _current_time + _time
diff --git a/favicon_app/routes/favicon_routes.py b/favicon_app/routes/favicon_routes.py
index d6ba8f0..79ea38e 100644
--- a/favicon_app/routes/favicon_routes.py
+++ b/favicon_app/routes/favicon_routes.py
@@ -63,7 +63,7 @@ async def get_referrer(unique: Optional[str] = Query(None)):
         try:
             content = FileUtil.read_file(path, mode='r') or 'None'
 
-            if unique in ['true', '1', 'True']:
+            if unique in ['true', '1']:
                 lines = [line.strip() for line in content.split('\n') if line.strip()]
                 unique_lines = list(set(lines))
                 unique_content = '\n'.join(unique_lines)
diff --git a/favicon_app/routes/favicon_service.py b/favicon_app/routes/favicon_service.py
index ebeb394..af53bd4 100644
--- a/favicon_app/routes/favicon_service.py
+++ b/favicon_app/routes/favicon_service.py
@@ -7,7 +7,6 @@ import random
 import re
 import time
 from queue import Queue
-from threading import Lock
 from typing import Optional, Tuple, Dict, List
 
 import bs4
@@ -350,6 +349,7 @@ class FaviconService:
             'request_cache_count': self.request_cache_count,
             'queue_size': self.icon_queue.qsize(),
             'total_queue_size': self.total_queue.qsize(),
+            'domain_list': self.domain_list,
         }
 
     async def get_favicon_handler(
@@ -362,7 +362,7 @@ class FaviconService:
     ) -> dict[str, str] | Response:
         """处理获取图标的请求"""
 
-        logger.info(f"队列大小：{self.icon_queue.qsize()} | {self.total_queue.qsize()} | {len(favicon.failed_urls)}")
+        logger.info(f"队列大小 icon/total/failed：{self.icon_queue.qsize()} | {self.total_queue.qsize()} | {len(favicon.failed_urls)}")
 
         self.url_count += 1
 
@@ -380,18 +380,18 @@ class FaviconService:
 
             # 检查内存缓存中的失败URL
             if entity.domain in favicon.failed_urls:
-                _expire_time = favicon.failed_urls[entity.domain]
+                _expire_time = favicon.failed_urls.get(entity.domain)
                 if int(time.time()) <= _expire_time:
                     return self.get_default(self.time_of_7_days)
                 else:
                     del favicon.failed_urls[entity.domain]
 
             # 检查缓存
-            _cached, cached_icon = self._get_cache_icon(entity.domain_md5, refresh=refresh in ['true', '1', 'True'])
+            _cached, cached_icon = self._get_cache_icon(entity.domain_md5, refresh=refresh in ['true', '1'])
 
-            if cached_icon:
+            if _cached or cached_icon:
                 # 使用缓存图标
-                icon_content = cached_icon
+                icon_content = cached_icon if cached_icon else _cached
                 self.request_cache_count += 1
 
                 # 确定内容类型和缓存时间
@@ -412,38 +412,32 @@ class FaviconService:
                                 media_type=content_type if content_type else "image/x-icon",
                                 headers=self._get_header(content_type, cache_time))
             else:
-                _referrer = request.headers.get('referrer') or request.headers.get('referer')
+                # 开始图标处理，加入两个队列
+                self.icon_queue.put(entity.domain)
+                self.total_queue.put(entity.domain)
+
                 # 检查sync参数
-                is_sync = sync in ['true', '1', 'True']
-                if (not is_sync) or (_referrer and not _referrer.startswith('https://api.xinac.net')):
+                is_sync = sync in ['true', '1']
+                if (not is_sync) or (not check_referer(request)):
                     # 返回默认图片并加入后台队列
                     logger.info(f"返回默认图片并加入后台队列: {entity.domain}")
-                    # 开始图标处理，加入两个队列
-                    self.icon_queue.put(entity.domain)
-                    self.total_queue.put(entity.domain)
                     bg_tasks.add_task(self.get_icon_sync, entity, _cached)
-                    return self.get_default()
+                    return self.get_default(0)
                 else:
                     # 没有缓存，实时处理，检查队列大小
                     queue_size = self.icon_queue.qsize()
                     if queue_size >= self.MAX_QUEUE_SIZE:
                         # 加入后台队列并返回默认图片
                         logger.info(f"队列大小({queue_size})>={self.MAX_QUEUE_SIZE}，返回默认图片并加入后台队列: {entity.domain}")
-                        # 开始图标处理，加入两个队列
-                        self.icon_queue.put(entity.domain)
-                        self.total_queue.put(entity.domain)
                         bg_tasks.add_task(self.get_icon_sync, entity, _cached)
-                        return self.get_default()
+                        return self.get_default(0)
                     else:
                         # 队列<MAX_QUEUE_SIZE，实时处理
                         logger.info(f"队列大小({queue_size})<{self.MAX_QUEUE_SIZE}，实时处理: {entity.domain}")
-                        # 开始图标处理，加入两个队列
-                        self.icon_queue.put(entity.domain)
-                        self.total_queue.put(entity.domain)
                         icon_content = self.get_icon_sync(entity, _cached)
 
                         if not icon_content:
-                            # 获取失败，返回默认图标，不缓存
+                            # 获取失败，返回默认图标
                             return self.get_default()
 
                         # 确定内容类型和缓存时间
@@ -467,3 +461,12 @@ class FaviconService:
         return Response(content=default_icon_content,
                         media_type="image/png",
                         headers=self._get_header("image/png", cache_time))
+
+
+def check_referer(request: Request) -> bool:
+    _referer = request.headers.get('referrer') or request.headers.get('referer')
+    if _referer:
+        return (_referer.startswith('https://api.xinac.net')
+                or _referer.startswith('http://127.0.0.1')
+                or _referer.startswith('http://localhost'))
+    return False
diff --git a/main.py b/main.py
index ba1a6a4..23a393e 100644
--- a/main.py
+++ b/main.py
@@ -30,9 +30,9 @@ app.include_router(favicon_router)
 
 @app.middleware("http")
 async def log_referer(request: Request, call_next):
-    _referrer = request.headers.get('referrer') or request.headers.get('referer')
-    if _referrer:
-        FileUtil.write_file(referer_log_file, '%s\n' % _referrer, mode='a')
+    _referer = request.headers.get('referrer') or request.headers.get('referer')
+    if _referer:
+        FileUtil.write_file(referer_log_file, '%s\n' % _referer, mode='a')
     response = await call_next(request)
     return response