修复浏览器缓存导致前端没更新的问题

README.md

@@ -108,6 +108,8 @@ server {
 	ssl_certificate /PATH/TO/CERT.crt;
 	ssl_certificate_key /PATH/TO/CERT_KEY.key;
 
+	set $blivechat_path /PATH/TO/BLIVECHAT;
+
 	client_body_buffer_size 256k;
 	client_max_body_size 1.1m;
 
@@ -120,12 +122,20 @@ server {
 
 	# 静态文件
 	location / {
-		root /PATH/TO/BLIVECHAT/frontend/dist;
-		# 如果文件不存在，交给前端路由
-		try_files $uri $uri/ /index.html;
+		root $blivechat_path/frontend/dist;
+		try_files $uri $uri/ @index;
+	}
+	# 不存在的文件请求转发到index.html，交给前端路由
+	location @index {
+		rewrite ^ /index.html last;
+	}
+	location = /index.html {
+		root $blivechat_path/frontend/dist;
+		# index.html不缓存，防止更新后前端还是旧版
+		add_header Cache-Control no-cache;
 	}
 	location /emoticons {
-		alias /PATH/TO/BLIVECHAT/data/emoticons;
+		alias $blivechat_path/data/emoticons;
 	}
 	# 动态API
 	location /api {

api/base.py

@@ -10,6 +10,8 @@ class ApiHandler(tornado.web.RequestHandler):  # noqa
         self.json_args = None
 
     def prepare(self):
+        self.set_header('Cache-Control', 'no-cache')
+
         if not self.request.headers.get('Content-Type', '').startswith('application/json'):
             return
         try:

api/main.py

@@ -19,13 +19,22 @@ EMOTICON_BASE_URL = '/emoticons'
 class MainHandler(tornado.web.StaticFileHandler):  # noqa
     """为了使用Vue Router的history模式，把不存在的文件请求转发到index.html"""
     async def get(self, path, include_body=True):
+        if path == '':
+            await self._get_index(include_body)
+            return
+
         try:
             await super().get(path, include_body)
         except tornado.web.HTTPError as e:
             if e.status_code != 404:
                 raise
             # 不存在的文件请求转发到index.html，交给前端路由
-            await super().get('index.html', include_body)
+            await self._get_index(include_body)
+
+    async def _get_index(self, include_body=True):
+        # index.html不缓存，防止更新后前端还是旧版
+        self.set_header('Cache-Control', 'no-cache')
+        await super().get('index.html', include_body)
 
 
 class ServerInfoHandler(api.base.ApiHandler):  # noqa

main.py

@@ -29,7 +29,7 @@ routes = [
     (r'/api/avatar_url', api.chat.AvatarHandler),
 
     (rf'{api.main.EMOTICON_BASE_URL}/(.*)', tornado.web.StaticFileHandler, {'path': api.main.EMOTICON_UPLOAD_PATH}),
-    (r'/(.*)', api.main.MainHandler, {'path': config.WEB_ROOT, 'default_filename': 'index.html'})
+    (r'/(.*)', api.main.MainHandler, {'path': config.WEB_ROOT})
 ]
 
 
@@ -98,8 +98,6 @@ def run_server(host, port, debug):
         return
     finally:
         url = 'http://localhost/' if port == 80 else f'http://localhost:{port}/'
-        # 防止更新版本后浏览器加载缓存
-        url += '?_v=' + update.VERSION
         webbrowser.open(url)
     logger.info('Server started: %s:%d', host, port)
     tornado.ioloop.IOLoop.current().start()