Using mod rewrite to change query text

Question

I'm an extreme novice at Apache, but I am trying very hard and doing my best to learn. However I've run up against an issue and although I've searched extensively (spent the last 3+ hours trying different things to try to make it work, lol), I've still been unable to find anything that does exactly what I need. However, (I think) this should be extraordinarily simple question for someone more versed in this than I.

What I'm needing is a simply RewriteRule that will take a URL (https://sample.example.com/login.htm?page=%2F), and when visited, redirect/change it to "https://sample.example.com/login.htm?page=%2Fui2.htm). I've tried rewrite rules, redirects, conditions, etc....but nothing I do gets there perfectly. I feel like I'm really, really, really close but I can't quite cross that last step. Here's what I have in the virtual host file this site matches to:

<IfModule mod_ssl.c>

<VirtualHost *:443>

ServerName sample.example.com
ServerAdmin webmaster@localhost


SSLCertificateFile /etc/letsencrypt/live/sample.example.com/fullchain.pem
SSLCertificateKeyFile /etc/letsencrypt/live/sample.example.com/privkey.pem
Include /etc/letsencrypt/options-ssl-apache.conf


RewriteEngine on
RewriteRule "^/login\.htm$" "/login.htm?page=%2Fui2.htm" [R,L]


ProxyRequests Off
ProxyPreserveHost On
<Location />
        ProxyPass http://192.168.x.x:38374/
        ProxyPassReverse http://192.168.x.x:38374/
</Location>

ErrorLog ${APACHE_LOG_DIR}/error.log
CustomLog ${APACHE_LOG_DIR}/access.log combined


</VirtualHost>

# vim: syntax=apache ts=4 sw=4 sts=4 sr noet

</IfModule>

(the internal IP and domain names above are obviously masked)

I know the input text for the rewrite is working with certainty, it's just the re-written part that's failing. Everything works, except that it redirects me to https://sample.example.com/login.htm?page=Fui2.htm (i.e. it removes the "%2" part). Therein lies my problem.

1 more attempt. Keep it as it is and use B and NE flags also. [NE,B,R,L] — Mohammad Yusuf
– Mohammad Yusuf, Commented Dec 16, 2016 at 7:27

ryugie · Accepted Answer · 2016-12-16 07:00:59Z

1

Try escaping the %2 part with \s

answered Dec 16, 2016 at 7:00

ryugie

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23 Comments

ohlin5 Over a year ago

I tried changing the "%2" to "\%2" which didn't work...Are you saying to try "\%\2"?

Mohammad Yusuf Over a year ago

@ohlin5 try \%2 and remove the double quotes from both regex string and replacement string.

ohlin5 Over a year ago

I've tried both the suggestions the other poster here suggested, looks like he keeps editing it :) Anyways the neither worked...Most recent one redirects to sample.example.com/login.htm?page=Fui2.htm

ohlin5 Over a year ago

OK so great news is that fixes the URL...Bad news is it still doesn't load as I now get caught in a redirect loop (browser says site redirected too many times and throws error). Thoughts there?

ohlin5 Over a year ago

I got it!!! "RewriteCond %{QUERY_STRING} ^page=%2F$" (right above the rewrite, without the double quotes) did the trick! Thanks so much for the awesome help man!!

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