The difference between nginx with / and without /

1. The difference between with / and without /

location /mp/dnadms/ {
    proxy_pass http://127.0.0.1:10003;
    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-Host $http_host;
    proxy_set_header X-Forwarded-Port $server_port;
    proxy_set_header X-Forwarded-Proto $scheme;
    proxy_redirect http:// https://;
  }
# 不带 /  访问 http://localhost/mp/dnadms/index.do  实际访问的是  http://127.0.0.1/mp/dnadms/index.do

location /mp/dnadms/ {
    proxy_pass http://127.0.0.1:10003/;
    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-Host $http_host;
    proxy_set_header X-Forwarded-Port $server_port;
    proxy_set_header X-Forwarded-Proto $scheme;
    proxy_redirect http:// https://;
  }
# 带 /  访问 http://localhost/mp/dnadms/index.do  实际访问的是  http://127.0.0.1/index.do