Apache 2.4.27 mod_rewrite to cgi-bin fails

Question

Apache 2.4.27 on Oracle Linux 7 x64.

I can make proper calls to https://example.com/cgi-bin/helloworld.cgi.
The simple Perl script returns "Hello, world via cgi-bin!"

I can make proper calls to static content in https://example.com/helloworld.html
The simple HTML file returns "Hello, world via html!"

I can use RewriteRule as:

RewriteRule "^/test" "/helloworld.html"

I see "Hello, world via html!"

However, I cannot use RewriteRule as:

RewriteRule "^/test" "/cgi-bin/helloworld.cgi"

This results in a 400 Bad Request. How is it that I can call it directly though?

How do I get my RewriteRule to work when going to /cgi-bin? That seems to be my problem. I tried adding [L] and [L,PT] but no help.

score 1 · Answer 1 · answered Oct 12 '17 at 23:39

I'm not sure what can be wrong in your configuration, how do you have ScriptAlias env set ?

I have tested with configuration below and everything seems to be fine on Apache 2.4.10 :

<VirtualHost 10.44.0.3:80>

    DocumentRoot "/vat/www/mysite"
    ServerName mysite.example.com
    ErrorLog "/var/log/apache2/mysite.example.com-error_log"
    CustomLog "/var/log/apache2/mysite.example.com-access_log" common

    ScriptAlias "/cgi-bin/" "/var/www/mysite/cgi-bin/"

    <Directory "/var/www/mysite">
          Require all granted
          Options Indexes FollowSymLinks MultiViews
          AllowOverride all
    </Directory>


    <Directory "/var/www/mysite/cgi-bin">
          Options +ExecCGI
          AddHandler cgi-script .cgi
    </Directory>


    RewriteEngine On
    RewriteRule "^/test" "/cgi-bin/test.cgi"

</VirtualHost>

opening http://mysite.exmaple.com/test opens up the cgi script

I think this may have to do with the fact that my RewriteRule was inside of my and putting it outside, seems to help. The cgi-bin isnt my code, but it doesnt return 404/400... I get some app specific stuff. I THINK this fixes it, but I am emailing app people to test. Thank you for your help. I will update with a final answer soon — AaronG, Oct 13 '17 at 00:22
@AaronG If your `RewriteRule` was inside a `` container then your first test (`RewriteRule "^/test" "/helloworld.html"`) also wouldn't have worked? But neither would this directive have resulted in a 400 response, as it simply would not have done anything - the `RewriteRule` _pattern_ would not match inside a `` container. So, there would seem to be _something else_ going on here? — MrWhite, Oct 13 '17 at 08:30

score 0 · Answer 2 · answered Nov 19 '19 at 01:13

I add the same problem. When I used:

RewriteRule "^/test" "/cgi-bin/helloworld.cgi"

It didn't work. I had to use LogLevel alert rewrite:trace3 to check the logs. In my case, the rewritten path was being prefixed with document_root. So, instead of /cgi-bin/helloworld.cgi I was getting /var/www/html/cgi-bin/helloworld.cgi.

To solve the issue, I used two flags:

RewriteRule "^/test" "/cgi-bin/helloworld.cgi" [NC,PT]

This question is related to https://stackoverflow.com/questions/30065739/mod-rewrite-rewrite-url-to-point-to-cgi-script-but-keep-rewrite-hidden/30067581#30067581

Apache 2.4.27 mod_rewrite to cgi-bin fails

2 Answers2