nginx reverse proxy redirects from http to https on the same port

server {
listen 8001 ssl;
ssl_certificate /home/xxx/server.crt;
ssl_certificate_key /home/xxx/server.key;
error_page 497 301 =307 https://$host:$server_port$request_uri;#强制跳转
location /{
proxy_pass http://localhost:8000/;
proxy_redirect off;
proxy_set_header Host $host:$server_port;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Ssl on;
}
}