# Ubuntu环境下的Nginx优化配置
# 支持多客户端代理和动态请求头传递

# 上游服务器配置 - 指向开发服务器
upstream vite_dev_server {
    server 172.16.0.34:5173;
    # 连接池配置，提高性能
    keepalive 32;
    # 失败重试配置
    # server 172.16.0.34:5173 backup;  # 备用服务器（可选）
}

# 后端 API 服务器配置
upstream api_client_a {
    server 172.16.0.34:5174;
    keepalive 32;
}

upstream api_client_b {
    server 172.16.0.34:5175;
    keepalive 32;
}

upstream api_client_c {
    server 172.16.0.34:5176;
    keepalive 32;
}

upstream api_client_d {
    server 172.16.0.34:5177;
    keepalive 32;
}

# 日志格式定义 - 包含客户端标识
log_format client_access '$remote_addr - $remote_user [$time_local] '
                        '"$request" $status $body_bytes_sent '
                        '"$http_referer" "$http_user_agent" '
                        'client_id="$client_id" original_port="$server_port"';

# 客户端A配置 (端口5174)
server {
    listen 5174;
    server_name localhost 127.0.0.1;
    
    # 设置客户端标识变量
    set $client_id "client-a";
    
    # 访问日志 - 包含客户端信息
    access_log /var/log/nginx/client-a-access.log client_access;
    error_log /var/log/nginx/client-a-error.log warn;
    
    # 主要代理配置
    location / {
        # 反向代理到开发服务器
        proxy_pass http://vite_dev_server;
        
        # 基础代理头部
        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;
        
        # 客户端特定头部 - 用于应用识别客户端
        proxy_set_header X-Client-ID $client_id;
        proxy_set_header X-Original-Port $server_port;
        proxy_set_header X-Forwarded-Port $server_port;
        
        # 开发环境特殊配置 - 支持Vite热重载
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_http_version 1.1;
        
        # 连接超时配置
        proxy_connect_timeout 30s;
        proxy_send_timeout 30s;
        proxy_read_timeout 30s;
        
        # 禁用缓冲以支持实时更新
        proxy_buffering off;
        proxy_cache off;
        proxy_request_buffering off;
        
        # 处理大文件上传
        client_max_body_size 100M;
        
        # 开发环境安全头部（相对宽松）
        add_header X-Frame-Options SAMEORIGIN always;
        add_header X-Content-Type-Options nosniff always;
        add_header X-XSS-Protection "1; mode=block" always;
        
        # 开发环境CORS支持
        add_header Access-Control-Allow-Origin * always;
        add_header Access-Control-Allow-Methods "GET, POST, PUT, DELETE, OPTIONS, PATCH" always;
        add_header Access-Control-Allow-Headers "DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range,Authorization,X-Client-ID,X-Original-Port,X-Forwarded-Port" always;
        add_header Access-Control-Allow-Credentials true always;
    }
    
    # 健康检查端点
    location /health {
        access_log off;
        return 200 "Client A (Port 5174) - OK\n";
        add_header Content-Type text/plain;
        add_header X-Client-ID $client_id;
    }
    
    # API代理特殊处理 - 修改为代理到对应的后端API服务器
    location /api/ {
        proxy_pass http://api_client_a;
        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-Client-ID $client_id;
        proxy_set_header X-Original-Port $server_port;
        
        # API请求超时配置
        proxy_connect_timeout 10s;
        proxy_send_timeout 60s;
        proxy_read_timeout 60s;
    }
    
    # 全局错误页面配置
    error_page 502 503 504 /50x.html;
    location = /50x.html {
        root /usr/share/nginx/html;
    }

    # 处理OPTIONS预检请求
    if ($request_method = 'OPTIONS') {
        return 204;
    }
}

# 客户端B配置 (端口5175)
server {
    listen 5175;
    server_name localhost 127.0.0.1;
    
    set $client_id "client-b";
    
    access_log /var/log/nginx/client-b-access.log client_access;
    error_log /var/log/nginx/client-b-error.log warn;
    
    location / {
        proxy_pass http://vite_dev_server;
        
        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 X-Client-ID $client_id;
        proxy_set_header X-Original-Port $server_port;
        proxy_set_header X-Forwarded-Port $server_port;
        
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_http_version 1.1;
        
        proxy_connect_timeout 30s;
        proxy_send_timeout 30s;
        proxy_read_timeout 30s;
        
        proxy_buffering off;
        proxy_cache off;
        proxy_request_buffering off;
        
        client_max_body_size 100M;
        
        # 开发环境安全头部（相对宽松）
        add_header X-Frame-Options SAMEORIGIN always;
        add_header X-Content-Type-Options nosniff always;
        add_header X-XSS-Protection "1; mode=block" always;
        
        # 开发环境CORS支持
        add_header Access-Control-Allow-Origin * always;
        add_header Access-Control-Allow-Methods "GET, POST, PUT, DELETE, OPTIONS, PATCH" always;
        add_header Access-Control-Allow-Headers "DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range,Authorization,X-Client-ID,X-Original-Port,X-Forwarded-Port" always;
        add_header Access-Control-Allow-Credentials true always;
    }
    
    location /health {
        access_log off;
        return 200 "Client B (Port 5175) - OK\n";
        add_header Content-Type text/plain;
        add_header X-Client-ID $client_id;
    }
    
    # API代理特殊处理 - 修改为代理到对应的后端API服务器
    location /api/ {
        proxy_pass http://api_client_b;
        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-Client-ID $client_id;
        proxy_set_header X-Original-Port $server_port;
        
        # API请求超时配置
        proxy_connect_timeout 10s;
        proxy_send_timeout 60s;
        proxy_read_timeout 60s;
    }

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

    # 处理OPTIONS预检请求
    if ($request_method = 'OPTIONS') {
        return 204;
    }
}

# 客户端C配置 (端口5176)
server {
    listen 5176;
    server_name localhost 127.0.0.1;
    
    set $client_id "client-c";
    
    access_log /var/log/nginx/client-c-access.log client_access;
    error_log /var/log/nginx/client-c-error.log warn;
    
    location / {
        proxy_pass http://vite_dev_server;
        
        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 X-Client-ID $client_id;
        proxy_set_header X-Original-Port $server_port;
        proxy_set_header X-Forwarded-Port $server_port;
        
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_http_version 1.1;
        
        proxy_connect_timeout 30s;
        proxy_send_timeout 30s;
        proxy_read_timeout 30s;
        
        proxy_buffering off;
        proxy_cache off;
        proxy_request_buffering off;
        
        client_max_body_size 100M;
        
        # 开发环境安全头部（相对宽松）
        add_header X-Frame-Options SAMEORIGIN always;
        add_header X-Content-Type-Options nosniff always;
        add_header X-XSS-Protection "1; mode=block" always;
        
        # 开发环境CORS支持
        add_header Access-Control-Allow-Origin * always;
        add_header Access-Control-Allow-Methods "GET, POST, PUT, DELETE, OPTIONS, PATCH" always;
        add_header Access-Control-Allow-Headers "DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range,Authorization,X-Client-ID,X-Original-Port,X-Forwarded-Port" always;
        add_header Access-Control-Allow-Credentials true always;
    }
    
    location /health {
        access_log off;
        return 200 "Client C (Port 5176) - OK\n";
        add_header Content-Type text/plain;
        add_header X-Client-ID $client_id;
    }
    
    # API代理特殊处理 - 修改为代理到对应的后端API服务器
    location /api/ {
        proxy_pass http://api_client_c;
        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-Client-ID $client_id;
        proxy_set_header X-Original-Port $server_port;
        
        # API请求超时配置
        proxy_connect_timeout 10s;
        proxy_send_timeout 60s;
        proxy_read_timeout 60s;
    }

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

    # 处理OPTIONS预检请求
    if ($request_method = 'OPTIONS') {
        return 204;
    }
}

# 客户端D配置 (端口5177) - 预留扩展
server {
    listen 5177;
    server_name localhost 127.0.0.1;
    
    set $client_id "client-d";
    
    access_log /var/log/nginx/client-d-access.log client_access;
    error_log /var/log/nginx/client-d-error.log warn;
    
    location / {
        proxy_pass http://vite_dev_server;
        
        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 X-Client-ID $client_id;
        proxy_set_header X-Original-Port $server_port;
        proxy_set_header X-Forwarded-Port $server_port;
        
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_http_version 1.1;
        
        proxy_connect_timeout 30s;
        proxy_send_timeout 30s;
        proxy_read_timeout 30s;
        
        proxy_buffering off;
        proxy_cache off;
        proxy_request_buffering off;
        
        client_max_body_size 100M;
        
        # 开发环境安全头部（相对宽松）
        add_header X-Frame-Options SAMEORIGIN always;
        add_header X-Content-Type-Options nosniff always;
        add_header X-XSS-Protection "1; mode=block" always;
        
        # 开发环境CORS支持
        add_header Access-Control-Allow-Origin * always;
        add_header Access-Control-Allow-Methods "GET, POST, PUT, DELETE, OPTIONS, PATCH" always;
        add_header Access-Control-Allow-Headers "DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range,Authorization,X-Client-ID,X-Original-Port,X-Forwarded-Port" always;
        add_header Access-Control-Allow-Credentials true always;
    }
    
    location /health {
        access_log off;
        return 200 "Client D (Port 5177) - OK\n";
        add_header Content-Type text/plain;
        add_header X-Client-ID $client_id;
    }
    
    # API代理特殊处理 - 修改为代理到对应的后端API服务器
    location /api/ {
        proxy_pass http://api_client_d;
        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-Client-ID $client_id;
        proxy_set_header X-Original-Port $server_port;
        
        # API请求超时配置
        proxy_connect_timeout 10s;
        proxy_send_timeout 60s;
        proxy_read_timeout 60s;
    }

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

    # 处理OPTIONS预检请求
    if ($request_method = 'OPTIONS') {
        return 204;
    }
}