+RewriteCond %{REQUEST_URI}::$1 ^(/.+)/(.*)::\2$
+RewriteRule ^(.*) - [E=BASE:%1]
+
+RewriteCond %{ENV:REDIRECT_BASE} (.+)
+RewriteRule .* - [E=BASE:%1]
+
+# Forward the "Authorization" HTTP header
+RewriteCond %{HTTP:Authorization} ^(.*)
+RewriteRule .* - [e=HTTP_AUTHORIZATION:%1]
+
+RewriteCond %{REQUEST_FILENAME} !-f
+RewriteCond %{REQUEST_FILENAME} !-d
+RewriteRule ^((?!api/)[^/]*)/?(.*)$ $2?%{QUERY_STRING} [E=USERSPACE:$1]
+
+RewriteCond %{ENV:REDIRECT_USERSPACE} (.+)
+RewriteRule .* - [E=USERSPACE:%1]
+