Rewrite a URL to include an extra parameter with a space in it

问题

Now that .htaccess rewrites all URLs and includes a parameter, how can that parameter have a space in it?

For example

• http://old.io --> http://new.com?pa=v%20a

While %20 works when testing in a .htaccess simulator, it doesn't work on my DreamHost account.

• http://new.com?pa=v%20a --> http://new.com?pa=v0a
• http://new.com?pa=v\ a --> http://new.com?pa=v a
• http://new.com?pa=v%2520a --> http://new.com?pa=v520a
• adding the NE flag doesn't change anything

回答1:

You're right; Even though adding %20 works in the simulator, it does not work on a real httpd server.

To add a space, you need to escape it with a \. Here's what your htaccess file looks like:

RewriteEngine on
RewriteBase /

# Check if the host matches old.io,
# You might want to add www\. to that.
RewriteCond %{HTTP_HOST} ^old\.io

# Rewrite URLs with empty querystring
RewriteCond %{QUERY_STRING} ^$
RewriteRule ^(.*)$ http://new.com/$1?pa=v\ a [L,R]

# Rewrite URLs with non-empty querystring    
RewriteCond %{QUERY_STRING} ^.+$
RewriteRule ^(.*)$ http://new.com/$1?pa=v\ a&%{QUERY_STRING} [L,R]

Notice pa=v\ a in RewriteRule directives.

来源：https://stackoverflow.com/questions/41397961/rewrite-a-url-to-include-an-extra-parameter-with-a-space-in-it