[SOLVED] 500 Internal server error when using the mod_rewrite

netpumber · 05-12-2015, 05:36 AM

Hello.

I have such links in a web site

/post.php?id=14
/cat.php?t=y&cid=6666

and i create an .htaccess file with that content inside.

Code:

Options +FollowSymLinks 
RewriteEngine On 
RewriteRule ^([^/]*)$ /post.php?id=$1 [L] 
RewriteRule ^([^/]*)/([^/]*)$ /cat.php?t=$1&cid=$2 [L]

but on refresh, apache returns 500 Internal server error.

I looked on logs and found that :

Quote:

AH00124: Request exceeded the limit of 10 internal redirects due to probable configuration error. Use 'LimitInternalRecursion' to increase the limit if necessary. Use 'LogLevel debug' to get a backtrace.

Why that happens ? Mod_rewrite is enabled in httpd.conf.

bathory · 05-12-2015, 08:15 AM

Quote:

I looked on logs and found that :

AH00124: Request exceeded the limit of 10 internal redirects due to probable configuration error. Use 'LimitInternalRecursion' to increase the limit if necessary. Use 'LogLevel debug' to get a backtrace.
Why that happens ? Mod_rewrite is enabled in httpd.conf.

This happens because rewrite goes on loop.
you need a condition, so rewrite stops as soon as it meets. E.g:

Code:

RewriteEngine On 
RewriteCond %{REQUEST_URI} !^/post.php
RewriteRule ^([^/]*)$ /post.php?id=$1 [L]

I don't understand what you're trying to do, but I guess you have to define the rewrite based on the original URI (/post.php or /cat.php), e.g.

Code:

RewriteRule ^/post.php([^/]*)$ /post.php?id=$1 [L] 
RewriteRule ^/cat/php([^/]*)/([^/]*)$ /cat.php?t=$1&cid=$2 [L]

netpumber · 05-13-2015, 02:09 AM

I want to show the URL in a different way.

The www.site.com/post.php?id=24 to become www.site.com/24

and

The www.site.com/cat.php?t=y&cid=2015 to become www.site.com/y/2015

bathory · 05-13-2015, 04:56 AM

Quote:

Originally Posted by netpumber

I want to show the URL in a different way.

The www.site.com/post.php?id=24 to become www.site.com/24

and

The www.site.com/cat.php?t=y&cid=2015 to become www.site.com/y/2015

You can use the %{QUERY_STRING} in the rewrite conditions as follows:

Code:

RewriteCond %{QUERY_STRING} ^id=(.*)$
RewriteRule ^/post.php /%1? [L]
RewriteCond %{QUERY_STRING} ^t=(.*)\&cid=(.*)
RewriteRule ^/cat.php /%1/%2 [L]

netpumber · 05-14-2015, 02:24 AM

tried it but doesn't seem to work. It shows URLs as before.

Used this in .htaccess file at root dir.

Code:

Options +FollowSymLinks 
RewriteEngine On 
RewriteCond {QUERY_STRING} ^id=(.*)$
RewriteRule ^/post.php /%1? [L]
RewriteCond %{QUERY_STRING} ^t=(.*)\&cid=(.*)
RewriteRule ^/cat.php /%1/%2 [L]

bathory · 05-14-2015, 03:27 AM

Quote:

Used this in .htaccess file at root dir.

In this case you don't need the leading slash:

Code:

Options +FollowSymLinks 
RewriteEngine On 
RewriteCond {QUERY_STRING} ^id=(.*)$
RewriteRule ^post.php /%1? [L]
RewriteCond %{QUERY_STRING} ^t=(.*)\&cid=(.*)
RewriteRule ^cat.php /%1/%2? [L]

netpumber · 05-15-2015, 12:47 AM

Even with this seems not working.

bathory · 05-15-2015, 01:45 AM

Quote:

Originally Posted by netpumber

Even with this seems not working.

How exactly is not working? Could you be more specific?

netpumber · 05-16-2015, 12:02 PM

I add those lines in an .htaccess at the root directory, and when i visit the site URLs still have that form :

www.site.com/post.php?id=24

bathory · 05-16-2015, 04:10 PM

Quote:

Originally Posted by netpumber

I add those lines in an .htaccess at the root directory, and when i visit the site URLs still have that form :

www.site.com/post.php?id=24

Somewhere between posts 4-5 we missed the % in front of the {QUERY_STRING}. Try to add it and see if it works

Code:

Options +FollowSymLinks 
RewriteEngine On 
RewriteCond %{QUERY_STRING} ^id=(.*)$
RewriteRule ^post.php /%1? [L]
RewriteCond %{QUERY_STRING} ^t=(.*)\&cid=(.*)
RewriteRule ^cat.php /%1/%2? [L]

If it still doesn't work, make sure that apache reads the .htaccess files

netpumber · 05-17-2015, 09:31 AM

It seems that reads .htaccess cause AllowOverride is setted to All. Now with that change, when i'm going to visit the link , server returns 404, Object not found.

bathory · 05-17-2015, 12:03 PM

Quote:

Originally Posted by netpumber

It seems that reads .htaccess cause AllowOverride is setted to All. Now with that change, when i'm going to visit the link , server returns 404, Object not found.

Yup it reads it. The 404 error is because the URL /post.php?id=X is rewritten to /X and there is no such thing. So I guess that you just want to replace the actual query_string with a path made from it
If that's the case, assuming that post.php query_string accepts only numeric values, while cat.php accepts as first argument a string and as second a number, try the following

Code:

RewriteCond %{REQUEST_URI} !^/post.php
RewriteRule ^([0-9]+)$ /post.php?id=$1 [L]

RewriteCond %{REQUEST_URI} !^/cat.php
RewriteRule ^([^/]+)/([0-9]+)$ /cat.php?t=$1&cid=$2 [L]

Btw the 2 RewriteCond are not necessary if you meet the above query_string restrictions

netpumber · 05-18-2015, 01:29 AM

Tried what you wrote but url remains the same

bathory · 05-18-2015, 04:54 AM

Quote:

Originally Posted by netpumber

Tried what you wrote but url remains the same

Isn't that what are you trying to do?
Using the latest rewrites, the client sees http://www.site.com/24 in the address bar, while he actually visits http://www.site.com/post.php?id=2
and same goes for cat.php
If you want to change the URL in address bar to show http://www.site.com/post.php?id=2, add [R] in both the rewriterules, e.g:

Code:

RewriteRule ^([0-9]+)$ /post.php?id=$1 [L,R]
RewriteRule ^([^/]+)/([0-9]+)$ /cat.php?t=$1&cid=$2 [L,R]

netpumber · 05-19-2015, 02:16 AM

Oh, ok that was my fault.

post seems now to work but for the cat.php if i visit www.site.com/y/2005

it loads the page but not correctly and without css

Failed to load resource: the server responded with a status of 404 (Not Found) http://www.site.com/y/styles/common.css