Apache htaccess: rewrite directory to query param - apache

Question

I know there are quite some questions out there about this issue but I have not yet been able to find the exact way how to do a rewrite in my case:
Having an application available at https://example.com/dev/myapp/#/?query=1234, I would like to allow an alternative access using this URL: https://example.com/dev/myapp/1234 without creating a sub-directory /1234.
Using the htaccess, I would like that the latter URL is rewritten/ forwarded to the former URL.
What I have tried:
RewriteEngine On
RewriteRule ^myapp/([^/])?$ myapp/index.html?query=$1 [L]
will forward
https://example.com/dev/myapp/1234
to
https://example.com/dev/myapp/1234#/
And
RewriteEngine On
RewriteRule ^(?!myapp/)([^/])?$ /dev/myapp?query=$1 [L,R=302]
will forward
https://example.com/dev/myapp/1234
to
https://example.com/dev/myapp/?query=1234#/
I am somehow stuck with getting the syntax right. Any help?

Answer 1

If I good understood, I create regex with group contain the numbers and re-used it for your query parameter, with NE flag for "noescape" output and keep "#" syntax, the doc.
A. You can use in your virtualhost, the code below, the url will changed.
RewriteEngine On
RewriteRule ^/dev/myapp/([0-9]+)$ /dev/myapp/\#/?query=$1 [L,R=301,NE]
B. If you need to keep url of source, enable in httpd.conf
LoadModule proxy_module modules/mod_proxy.so
LoadModule proxy_http_module modules/mod_proxy_http.so
And you can use in your virtualhost, the code below. (P for proxy)
SSLProxyEngine on
RewriteEngine On
RewriteRule ^/dev/myapp/([0-9]+)$ /dev/myapp/\#/?query=$1 [P]
I hope that will help you