# ============================================================================
# Nginx Stream + SSL Preread 自动分流主配置
# 架构：TCP层协议检测 → TLS/HTTP分流 → SSL终结 → 反向代理内网服务
# 版本：v2.0
# 最后更新：2026-10-06
#
# 配置结构：
#   nginx.conf          — 主配置（40130 端口 + 基础架构）
#   zhonjin_http.conf   — 子域名 HTTP 服务配置（include 到 http 块）
#   zhonjin_stream.conf — 子域名 Stream 分流配置（include 到 stream 块）
#   zhonjin.com.conf    — 配置总览说明文档
# ============================================================================

load_module /usr/lib/nginx/modules/ngx_stream_module.so;

user www-data;                      # Debian: www-data / CentOS: nginx
worker_processes auto;
pid /run/nginx.pid;
error_log /var/log/nginx/error.log warn;

events {
    worker_connections 8192;
}

# ============================================================================
# HTTP 块：SSL 终结 + 反向代理 + HTTP→HTTPS 跳转
# ============================================================================
http {
    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;

    sendfile        on;
    tcp_nopush      on;
    tcp_nodelay     on;
    keepalive_timeout  65;
    server_tokens off;

    log_format main '$remote_addr - $remote_user [$time_local] "$request" '
                    '$status $body_bytes_sent "$http_referer" "$http_user_agent" '
                    'proto=$ssl_protocol sni=$ssl_server_name';
    access_log /var/log/nginx/access.log main;

    # WebSocket 升级映射（全局定义，各 location 引用）
    map $http_upgrade $connection_upgrade {
        default upgrade;
        ''      close;
    }

    # ========================================================================
    # 服务组 1：外网端口 40130 → 内网服务 http://127.0.0.1:5004
    # 域名：chanking.zhonjin.com
    # ========================================================================

    # HTTPS 服务：SSL 终结，反代内网 5004
    server {
        listen 127.0.0.1:5005 ssl;
        http2 on;
        server_name chanking.zhonjin.com;

        ssl_certificate     /etc/letsencrypt/live/zhonjin.com/fullchain.pem;
        ssl_certificate_key /etc/letsencrypt/live/zhonjin.com/privkey.pem;
        ssl_session_cache   shared:SSL:10m;
        ssl_session_timeout 1d;
        ssl_session_tickets off;
        ssl_protocols       TLSv1.2 TLSv1.3;
        ssl_ciphers         ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384;
        ssl_prefer_server_ciphers off;

        add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;

        location / {
            proxy_pass http://127.0.0.1:5004;
            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 Upgrade           $http_upgrade;
            proxy_set_header Connection        $connection_upgrade;
            proxy_connect_timeout 5s;
            proxy_read_timeout    3600s;
            proxy_send_timeout    60s;
        }
    }

    # HTTP 服务：301 跳转到 HTTPS（端口 40130）
    server {
        listen 127.0.0.1:5006;
        server_name chanking.zhonjin.com;
        return 301 https://$host:40130$request_uri;
    }

    # ========================================================================
    # 子域名扩展配置（mqtt.zhonjin.com / baolin.zhonjin.com）
    # ========================================================================
    include /etc/nginx/conf.d/zhonjin_http.conf;
}

# ============================================================================
# Stream 块：TCP 层协议检测 + 自动分流
# ============================================================================
stream {
    error_log /var/log/nginx/stream_error.log warn;

    log_format stream_main '$remote_addr [$time_local] $protocol '
                           'preread=$ssl_preread_protocol status=$status '
                           'upstream=$upstream_addr bytes=$bytes_sent';

    # ========================================================================
    # Stream 服务组 1：外网端口 40130 → 内网 5004（chanking.zhonjin.com）
    # ========================================================================
    map $ssl_preread_protocol $backend_target_40130 {
        ""      127.0.0.1:5006;     # 明文HTTP → 301跳转到HTTPS
        default 127.0.0.1:5005;     # TLS流量 → SSL解密入口
    }

    server {
        listen 40130 backlog=4096;
        tcp_nodelay on;

        ssl_preread on;
        # nginx >=1.23.4 才启用，低版本注释掉！当前版本 1.26.3
        #ssl_preread_buffer_size 16k;

        proxy_pass $backend_target_40130;
        proxy_connect_timeout 10s;
        proxy_timeout        3600s;
        proxy_next_upstream   off;

        access_log /var/log/nginx/stream_access_40130.log stream_main;
    }

    # ========================================================================
    # 子域名扩展 Stream 配置（mqtt / baolin）
    # ========================================================================
    include /etc/nginx/stream.d/zhonjin_stream.conf;
}