Nginx handle two steps 301/302 [duplicate] - nginx

Question

I need to reverse proxy to an Apache server running on the localhost. The problem is that Apache redirects requests to directories without a trailing forward slash, to the directory with a trailing forward slash, as part of its DirectoryRewrite directive. The below nginx setup works fine when you go to https://myhost/sw/myapp/ but if you forget the trailing forward slash you end up being redirected to http://myhost:8080/sw/myapp. Short of disabling the Apache DirectoryRewrite directive what can I do to make sure that the / is always added to the end of any request so that Apache does not redirect?
server {
client_max_body_size 10240M;
listen 443 ssl;
server_name "";
ssl_certificate ../ssl/server.crt;
ssl_certificate_key ../ssl/server.key;
ssl_session_timeout 5m;
ssl_protocols SSLv2 SSLv3 TLSv1;
ssl_ciphers HIGH:!aNULL:!MD5;
ssl_prefer_server_ciphers on;
location /sw {
proxy_pass http://127.0.0.1:8080/sw;
proxy_redirect ~^http://127.0.0.1:8080/sw/([^.]*[^/])$ https://$host/sw/$1/;
proxy_redirect http://127.0.0.1:8080/ https://$host/;
proxy_next_upstream error timeout invalid_header http_500 http_502 http_503 http_504;
proxy_buffering off;
proxy_set_header HOST $host;
proxy_set_header Referer $http_referer;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
error_page 301 302 303 = #handle_redirect;
}

Answer 1

If the upstream server is redirecting to http://example.com:8080/ (rather than http://127.0.0.1:8080/) you will need to change or add another proxy_redirect statement. See this document for details.
For example:
proxy_redirect http://example.com:8080/ https://example.com/;
Or as you stated in comments:
proxy_redirect http://$host:8080/ https://$host/;
The proxy_redirect values need to exactly match the beginning of the Location: header in the 3xx response. You can use curl -I to identify the exact contents of that response header.