Termux中使用Nginx反向代理

项目背景：在 Termux 中运行了多个 web 项目，但是只有一个域名。这种情况下可以使用 Nginx 反向代理将不同访问路径映射到不同的项目。比如访问 itfox.net/express/ 会映射到 8080 端口的 express 项目，而访问 itfox.net 会映射 3000 端口的到默认项目。

安装 Nginx

# 安装 nginx
$ pkg install nginx

# 启动 nginx
$ nginx

修改配置文件

# /data/data/com.termux/files/usr/etc/nginx/nginx.conf

#user  nobody;
worker_processes  1;

#error_log  logs/error.log;
#error_log  logs/error.log  notice;
#error_log  logs/error.log  info;

#pid        logs/nginx.pid;


events {
    worker_connections  1024;
}


http {
    include       mime.types;
    default_type  application/octet-stream;

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

    #access_log  logs/access.log  main;

    sendfile        on;
    #tcp_nopush     on;

    #keepalive_timeout  0;
    keepalive_timeout  65;

    #gzip  on;

    server {
        listen       8088;
        server_name  *.itfox.net localhost;

        #charset koi8-r;

        #access_log  logs/host.access.log  main;

        # location / {
        #     root   /data/data/com.termux/files/usr/share/nginx/html;
        #     index  index.html index.htm;
        # }

        location ~ /express/ {
            proxy_pass http://127.0.0.1:8080;
            proxy_set_header Host  $host;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        }
        location / {
            proxy_pass http://127.0.0.1:3000;

            # 反向代理获取真实 IP 地址
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
         
            # websocket 反向代理
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection $connection_upgrade;
        }

        #error_page  404              /404.html;

        # redirect server error pages to the static page /50x.html
        #
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   /data/data/com.termux/files/usr/share/nginx/html;
        }
    }

    # another virtual host using mix of IP-, name-, and port-based configuration
    #
    #server {
    #    listen       8000;
    #    listen       somename:8080;
    #    server_name  somename  alias  another.alias;

    #    location / {
    #        root   html;
    #        index  index.html index.htm;
    #    }
    #}
}

参考资料
nginx 反向代理+路径重写 配置
nginx 配置文件 nginx.conf 之 server 及 server_name 的意义详解

重启 Nginx

# 重新加载配置文件
$ nginx -s reload

# 或者：先关闭再运行
$ nginx -s stop
$ nginx

最后，配合内网穿透就可以使用域名访问项目了。