Nginx配置文件中的关键字是什么？详细解释来了

perlCopy codeuser nginx;              # 运行 Nginx 的用户
worker_processes 1;      # 工作进程的数量
error_log /var/log/nginx/error.log warn;   # 错误日志路径和级别
pid /var/run/nginx.pid;  # 进程 ID 文件路径

events {
    worker_connections 1024; # 每个 worker 进程的最大并发连接数
}

http {
    include       /etc/nginx/mime.types; # MIME 类型配置文件
    default_type  application/octet-stream; # 默认 MIME 类型

    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"'; # 日志格式

    access_log  /var/log/nginx/access.log  main; # 访问日志路径和格式

    sendfile        on; # 是否开启文件传输优化
    #tcp_nopush     on; # 是否开启 TCP NOPUSH 模式
    #keepalive_timeout  0; # HTTP keep-alive 连接超时时间

    server {
        listen       80; # 监听端口
        server_name  example.com; # 域名或 IP 地址
        charset utf-8; # 字符编码

        location / {
            root   /usr/share/nginx/html; # 静态文件根目录
            index  index.html index.htm; # 默认首页文件
        }

        error_page   500 502 503 504  /50x.html; # 错误页面
        location = /50x.html {
            root   /usr/share/nginx/html;
        }

        location /api/ {
            proxy_pass http://127.0.0.1:8000/; # 反向代理到后端应用服务器
        }

        # HTTPS 配置
        # listen       443 ssl;
        # server_name  example.com;
        # ssl_certificate      /path/to/cert;
        # ssl_certificate_key  /path/to/key;
        # ssl_session_cache    shared:SSL:1m;
        # ssl_session_timeout  5m;
        # ssl_ciphers  HIGH:!aNULL:!MD5;
        # ssl_prefer_server_ciphers  on;
    }
}