update pay ui

valuefrontier.conf

@@ -6,6 +6,24 @@ map $http_upgrade $connection_upgrade {
  '' close;
 }
 
+# ============================================
+# Flask 后端负载均衡（支持多进程）
+# ============================================
+upstream flask_backend {
+    # 方式1: 单实例多 Worker（Gunicorn -w 4）
+    server 127.0.0.1:5001;
+
+    # 方式2: 多实例负载均衡（需要分别启动多个 Gunicorn）
+    # 取消下面的注释即可启用
+    # server 127.0.0.1:5001;
+    # server 127.0.0.1:5002;
+    # server 127.0.0.1:5003;
+    # server 127.0.0.1:5004;
+
+    # 保持连接（提升性能）
+    keepalive 32;
+}
+
 # HTTP (端口 80) 服务器块: 负责将所有HTTP请求重定向到HTTPS
 server {
     listen 80;
@@ -90,19 +108,33 @@ server {
     #     add_header Cache-Control "public, immutable";
     # }
 
-  # --- 后端API反向代理 ---
+  # --- 后端API反向代理（使用 upstream 支持负载均衡）---
     location /api/ {
-      proxy_pass http://127.0.0.1:5001;
+      proxy_pass http://flask_backend;
+      proxy_http_version 1.1;
       proxy_set_header Host $host;
       proxy_set_header X-Real-IP $remote_addr;
       proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
       proxy_set_header X-Forwarded-Proto $scheme;
+      proxy_set_header Connection "";  # 启用 keepalive
+
+      # 超时配置（微信回调等需要足够时间）
+      proxy_connect_timeout 60s;
+      proxy_send_timeout 120s;
+      proxy_read_timeout 120s;
+
+      # 错误处理
+      proxy_next_upstream error timeout http_502 http_503 http_504;
+      proxy_next_upstream_tries 3;
   }
+
+    # WebSocket (Socket.IO) 代理
     location /socket.io/ {
-      proxy_pass http://127.0.0.1:5001;
+      proxy_pass http://flask_backend;
       proxy_http_version 1.1;
       proxy_set_header Upgrade $http_upgrade;
       proxy_set_header Connection "upgrade";
+      proxy_set_header Host $host;
       proxy_set_header X-Real-IP $remote_addr;
       proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
       proxy_set_header X-Forwarded-Proto $scheme;