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Full Discussion: Perl or Shell script to read a transaction log in real time
Top Forums Shell Programming and Scripting Perl or Shell script to read a transaction log in real time Post 302291312 by bruno406 on Wednesday 25th of February 2009 11:10:18 AM
Old 02-25-2009
Perl or Shell script to read a transaction log in real time
Hello,
I have a Apache webserver running on RedHat. Its primary function is a proxy server for users accessing the internet. I have a transaction log that logs every transactions of every users. For users trying to access certain sites/content the transactions goes into a 302 redirect loop and the browser eventually throws the error. Basically I need a script that will continuously watch the transaction log in real time and if it sees 5 or more consecutive redirect from the same user to to same site then redirect them to a certain site like http://testsite.com
Below is the transaction log format

sourceIP of the end user <timestamp> content/site being accessed result code

206.40.1.2 [25/Feb/2009:09:13:36 -0600] GET Google HTTP/1.1" 302

So if the script sees something like below then the last redirect would be http://testsite.com

206.40.1.2 [25/Feb/2009:09:13:36 -0600] GET Google HTTP/1.1" 302
206.40.1.2 [25/Feb/2009:09:13:37 -0600] GET Google HTTP/1.1" 302
206.40.1.2 [25/Feb/2009:09:13:38 -0600] GET Google HTTP/1.1" 302
206.40.1.2 [25/Feb/2009:09:13:39 -0600] GET Google HTTP/1.1" 302
206.40.1.2 [25/Feb/2009:09:13:40 -0600] GET Google HTTP/1.1" 302

Any help would be really appreciated.

Thanks

Bruno
 

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LEARN ABOUT BSD

nislog

nislog(1M)						  System Administration Commands						nislog(1M)

NAME

       nislog - display the contents of the NIS+ transaction log

SYNOPSIS

       /usr/sbin/nislog [-h num | -t num]  [-v] [directory...]

DESCRIPTION

       nislog  displays  the  contents of the NIS+ server transaction log on the standard output. This command can be used to track changes in the
       namespace. The /var/nis/trans.log file contains the transaction log maintained by the NIS+ server. When updates occur, they are	logged	to
       this  file  and	then  propagated  to replicas as log transactions.  When the log is checkpointed, updates that have been propagated to the
       replicas are removed.

       The nislog command can only be run on an NIS+ server by superuser. It displays the log entries for that server only.

       If directory is not specified, the entire log is searched. Otherwise, only those logs entries that correspond to the specified  directories
       are displayed.

OPTIONS

       -h num	       Display num transactions from the ``head'' of the log. If the numeric parameter is  0, only the log header is displayed.

       -t num	       Display	num transactions from the ``tail'' of the log. If the numeric parameter is  0, only the log header is displayed.

       -v	       Verbose mode.

FILES

       /var/nis/trans.log      transaction log

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWnisu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       nis+(1), rpc.nisd(1M), nisfiles(4), attributes(5)

NOTES

       NIS+  might  not  be  supported in future releases of the SolarisTM Operating Environment. Tools to aid the migration from NIS+ to LDAP are
       available in the Solaris 9 operating environment. For more information, visit http://www.sun.com/directory/nisplus/transition.html.

SunOS 5.10							    12 Dec 2001 							nislog(1M)
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