定义在 src/core/ngx_inet.h

typedef struct {ngx_str_t                 url;ngx_str_t                 host;ngx_str_t                 port_text;ngx_str_t                 uri;in_port_t                 port;in_port_t                 default_port;in_port_t                 last_port;int                       family;unsigned                  listen:1;unsigned                  uri_part:1;unsigned                  no_resolve:1;unsigned                  no_port:1;unsigned                  wildcard:1;socklen_t                 socklen;ngx_sockaddr_t            sockaddr;ngx_addr_t               *addrs;ngx_uint_t                naddrs;char                     *err;
} ngx_url_t;

ngx_url_t 是 Nginx 中用于解析和存储 URL 或网络地址信息的核心结构体，主要用于配置解析、套接字地址管理 等