Redirect 301 adding many "/"s at the end

Question

I am facing the following problem with the combination of more than one .htaccess in my project.

I have the following structure

siteprincipal.com.br (não é WordPress)

and inside a domain with another site in Wordpress

site2.siteprincipal.com.br

site2 is inside a directory on public_html, where the main website runs

have two .htaccess in the following structure

public_html (siteprincipal)
|--.htaccess
|--site2 (wordpress)
   |--.htaccess

when I make a redirect of a url of siteprincipal to the site2, as an example

Redirect 301 /paginainterna/ http://site2.siteprincipal.com.br/paginainterna

the final result is

http://site2.siteprincipal.com.br/paginainterna////////////////

which results in an incorrect redirect.

the content .htaccess of siteprincipal is

RewriteEngine on

RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)/$ /$1 [L,R=301]

Redirect 301 /paginainterna/ http://site2.siteprincipal.com.br/paginainterna

#redirect sempre para www
RewriteCond %{HTTP_HOST} !^www\.
RewriteRule ^(.*)$ http://www.%{HTTP_HOST}/$1 [R=301,L]

# if a directory or a file exists, use it directly
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d

# otherwise forward it to index.php

RewriteRule .* index.php
RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization},L]

and the .htaccess of site2 is the standard of Wordpress

# BEGIN WordPress
AddDefaultCharset UTF-8

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>

# END WordPress

how I can prevent this lot of "/" from being included, or what I’m doing wrong?

Answer 1

In this type of structure, the first .htaccess manages both calls to the main domain and to the subdomain.

Note that both pages have the same address, for example:

www.siteprincipal.com.br/page1 

and

site2.siteprincipal.com.br/page1

redirect will loop as the first .htaccess will send it to the subdomain and try to redirect again as it is based only on %{REQUEST_URI}.

so it is important not to make a redirect using

Redirect 301 /page1 http://site2.siteprincipal.com.br/page1

and yes

RewriteCond %{HTTP_HOST} !^www\.siteprincipal\.com\.br$ [NC]
RewriteCond %{REQUEST_URI} !^\/page1$ [NC]
RewriteRule . http://site2.siteprincipal.com.br%{REQUEST_URI} [R=301,L]

this way ensures that the redirect reaches only the call made directly to the siteprincipal and not to the subdomain.