# Nginx多客户端反向代理配置
# 为3个不同地区客户端提供独立端口访问
# 所有请求最终转发到主服务 10.79.97.17:51703

# 上游服务器配置
upstream docreview_main {
    server 10.79.97.17:51703;
    keepalive 32;
}

# 客户端A - 端口51701
server {
    listen 51701;
    server_name 10.79.97.17;
    
    # 访问日志
    access_log /var/log/nginx/client-a-access.log;
    error_log /var/log/nginx/client-a-error.log;
    
    # 客户端标识
    set $client_id "client-a";
    
    location / {
        # 反向代理到主服务
        proxy_pass http://docreview_main;
        
        # 设置代理头部
        proxy_set_header Host $host:51703;
        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 X-Client-ID $client_id;
        
        # 连接设置
        proxy_connect_timeout 30s;
        proxy_send_timeout 30s;
        proxy_read_timeout 30s;
        
        # 缓冲设置
        proxy_buffering on;
        proxy_buffer_size 4k;
        proxy_buffers 8 4k;
        
        # WebSocket支持
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
    }
    
    # 健康检查
    location /health {
        access_log off;
        return 200 "Client A - OK";
        add_header Content-Type text/plain;
    }
}

# 客户端B - 端口51702
server {
    listen 51702;
    server_name 10.79.97.17;
    
    # 访问日志
    access_log /var/log/nginx/client-b-access.log;
    error_log /var/log/nginx/client-b-error.log;
    
    # 客户端标识
    set $client_id "client-b";
    
    location / {
        # 反向代理到主服务
        proxy_pass http://docreview_main;
        
        # 设置代理头部
        proxy_set_header Host $host:51703;
        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 X-Client-ID $client_id;
        
        # 连接设置
        proxy_connect_timeout 30s;
        proxy_send_timeout 30s;
        proxy_read_timeout 30s;
        
        # 缓冲设置
        proxy_buffering on;
        proxy_buffer_size 4k;
        proxy_buffers 8 4k;
        
        # WebSocket支持
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
    }
    
    # 健康检查
    location /health {
        access_log off;
        return 200 "Client B - OK";
        add_header Content-Type text/plain;
    }
}

# 客户端C - 端口51704
server {
    listen 51704;
    server_name 10.79.97.17;
    
    # 访问日志
    access_log /var/log/nginx/client-c-access.log;
    error_log /var/log/nginx/client-c-error.log;
    
    # 客户端标识
    set $client_id "client-c";
    
    location / {
        # 反向代理到主服务
        proxy_pass http://docreview_main;
        
        # 设置代理头部
        proxy_set_header Host $host:51703;
        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 X-Client-ID $client_id;
        
        # 连接设置
        proxy_connect_timeout 30s;
        proxy_send_timeout 30s;
        proxy_read_timeout 30s;
        
        # 缓冲设置
        proxy_buffering on;
        proxy_buffer_size 4k;
        proxy_buffers 8 4k;
        
        # WebSocket支持
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
    }
    
    # 健康检查
    location /health {
        access_log off;
        return 200 "Client C - OK";
        add_header Content-Type text/plain;
    }
}

# 全局配置
# 错误页面
error_page 502 503 504 /50x.html;
location = /50x.html {
    root /usr/share/nginx/html;
}

# 安全头部
add_header X-Frame-Options DENY;
add_header X-Content-Type-Options nosniff;
add_header X-XSS-Protection "1; mode=block";