# Rewrite all requests to /foo

.htaccess-dir-cached

# Rewrite to the cached file if it exists and is not a post or attachment.
<IfModule mod_rewrite.c>
  RewriteEngine On
  RewriteBase /
  # RewriteCond %{REQUEST_METHOD} !=POST
  # RewriteCond %{QUERY_STRING} !.*=.*
  # RewriteCond %{DOCUMENT_ROOT}/$1/index.html -f
  # RewriteRule ^(.*) /$1/index.html [L]
</IfModule>

.htaccess-root-min

# Rewrite all requests to /foo
<IfModule mod_rewrite.c>
  RewriteEngine on
  RewriteCond %{SERVER_NAME} www.foo.tld
  RewriteCond %{REQUEST_URI} !^/foo/
  RewriteRule ^(.*)$ /foo/$1 [L]
</IfModule>

.htaccess-root-verbose

# Server Configuration for the Site Root
#
# Use when all site files are placed in a directory.
# The <IfModule> is required for the site to work.
# The entire site can be shunted to a new /{dir}/ if needed.
#
# File: /.htaccess (Root)
# Created: 2020-07-20
# Time 18:52 UTC
# Lines: 22
# Length: 552

# Rewrite all requests to /{dir}/
<IfModule mod_rewrite.c>
  RewriteEngine on
  RewriteCond %{SERVER_NAME} www.foo.tld
  RewriteCond %{REQUEST_URI} !^/{dir}/
  RewriteRule ^(.*)$ /{dir}/$1 [L]
</IfModule>

# A generic backup is at: /.htaccess-root.

Each line is required. See:

https://github.com/earth3300/ec01/wiki/Forward-Slash

for a discussion.

.htaccess-dir-cached is a snippet designed to look first for and return a cached file, but only if the request is not a POST request or an attachment. An additional line which is platform specific and related to cookies is excluded from this snippet: (RewriteCond %{HTTP_COOKIE} !^.*(comment_author_|wordpress|wp-postpass_).*$.