Archive for March, 2009

Basic Site Redirects/Rewrites

21st March
2009
written by Chris

This is a super simple site redirect. This, of course, can get much more complicated than what is shown here.

Place this in the apache configuration file (non-Plesk boxen) or in a .htaccess file.

Options +FollowSymLinks
RewriteEngine on
RewriteRule (.*) http://www.newdomain.com/$1 [R=301,L]

—–
If you want to redirect a site using the httpd.conf file inside a VirtualHost container you can do it this way (requires mod_alias):

<VirtualHost *:80>
ServerName original.domain.name
Redirect permanent / http://redirected.site.com/
</VirtualHost>

—–
Here is a simple redirect to take http://domain.com to http://www.domain.com.

RewriteEngine On
RewriteCond %{HTTP_HOST} ^domain.com
RewriteRule (.*) http://www.domain.com$1 [R=301,L]

This needs to be placed in each VirtualHost container and modified for the domain you are serving in that VirtualHost.

——
You can add this rule to allow browsing to a page without using the page extension. Place this in a .htaccess file in the directory.

RewriteEngine on
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME}\.html -f
RewriteRule ^(.*)$ $1.html

Replace the .html extension with whatever extension you are trying to remove from the filename.

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Technology, apache

Apache Server Hits

21st March
2009
written by Chris

Use this little one liner to grab the number of hits from the apache access logs.

DATE=`date +%d.%b.%Y`':';for i in `lsof -p $(ps faxwwwu|awk '$1 ~ /^root$/ && $11 ~ /httpd$/ {print $2|"head -1"}' )| awk '$9 ~ /access_log$/ {print $9| "sort -u"}'`; do echo "——-"$i"——"$DATE;awk '$4 ~ /^.'$DATE'/ {hit[substr($4,2,2)"\t"substr($4,14,2)"."substr($4,17,1)]++;ip[$1]++} END { for (i in hit) { print hit[i]"\t"i|"sort -k 3 -g"}; print ""}' $i;done

You can also grab a sorted list of IP addresses accessing sites by doing using this one liner.

DATE=`date +%d.%b.%Y`;for i in `lsof -p $(ps faxwwwu|awk '$1 ~ /^root$/ && $11 ~ /httpd$/ {print $2|"head -1"}' )| awk '$9 ~ /access_log$/ {print $9| "sort -u"}'`; do echo "——-"$i"——"$DATE;awk '$4 ~ /^.'$DATE'/ {hit[substr($4,2,2)"\t"substr($4,14,2)"."substr($4,17,1)]++;ip[$1]++} END { for (i in hit) { print hit[i]"\t"i|"sort -k 3 -n"}; print "";  for (i in ip) {print ip[i]"\t"i|"sort -n"}}' $i;done
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Technology, apache

Memory Issues During PECL Package Install

20th March
2009
written by Chris

Recently, I ran into an error while attempting to install a PECL package on a Redhat 5.3 64bit server.

—-
Fatal error: Allowed memory size of 8388608 bytes exhausted (tried to allocate 23040 bytes) in /usr/share/pear/PEAR/Builder.php on line 263
—-

I checked the memory limit setting in /etc/php.ini and it was set for 16M so that wasn't the problem. This is happening because PECL requires more memory on a 64bit box than a 32bit one. Incidentally, this works fine on 32bit OS's.

There are a couple of ways to get around this. The first would be to place the following at the top of the /usr/share/pear/pearcmd.php file:

ini_set('memory_limit', '16M');

Alternatively, you could could add the following to /usr/bin/pecl:

-d memory_limit=16M

16M should be plenty. However, if you still don't have enough memory then up the number to 32M. If that isn't enough, something else is going on.

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Technology, apache