Perl Guru Forums: General Discussions: General Questions: search IP address

CGI/Perl Guide | Learning Center | Forums | Advertise | Login

Site Search: in


	MAIN INDEX	SEARCH POSTS	WHO'S ONLINE	LOG IN

Home: General Discussions: General Questions:
search IP address

judeski
Deleted

Feb 27, 2001, 8:02 PM

Post #1 of 5 (4214 views)

search IP address	Can't Post

i have this script/regex that's supposed to open a file (text or html) and search for an IP address on the page in the form of say: 209.245.56.103 and put it in a variable.

part of the script is written below. the regex may be inaccurate at this time, and the script shown is just for it to print the ip address just to confirm that i've read the IP address correctly. this is not the working version, as i still have to make a lot of changes. anyway my point is, no matter what i do, could not read the IP address in any way. what is returned is the decimal equivalent of a 32bit binary number (2 to the power of 32) which is equal to: 4294967296. any hint guys is really appreciated as i really have run out of options...

thanks in advance...

------------------------------------------------
#!/usr/bin/perl

$file = "ipaddress.html";

open(FILE,"<$file") or die "Can't open file - $file - for reading";

print "Content-type: text/html\n\n";

print "<html><body>";

if ($ipnum = ~/^\d\d\d\.\d\d\d\.\d\d\d\.\d\d\d/)
{
print "$ipnum";
print "
";
}

print "</body></html>";
close(FILE);
-------------------------------------------------

Jean
User

Feb 27, 2001, 9:53 PM

Post #2 of 5 (4211 views)

Re: search IP address [In reply to]	Can't Post

If I'm right, there were several mistakes in the script.
The following version reads the file and prints the IPs located in the beginning of each line.
Hope this helps ...

Code

#!/usr/bin/perl 
$file = "ipaddress.html"; 
open(FILE,"<$file") or die "Can't open file - $file - for reading"; 
print "Content-type: text/html\n\n"; 
print "<html><body>"; 
# Loops through all the lines of the $file 
while ($line = <FILE>) { 
    # Look for the IP in the beginning of each line 
    # Spaces are allowed before the actual IP entry (\s*) 
    if ($ipnum =~ /^\s*(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})/) { 
        $ipnum = $1;      # Assigns the IP found in the previous line. 
        print "$ipnum\n"; # Prints the IP and the new-line character(s). 
    } 
} 
print "</body></html>"; 
close(FILE);

Jean Spector
QA Engineer @ Extent Technologies, Ltd.
mage@lycosmail.com

judeski
Deleted

Mar 1, 2001, 4:47 PM

Post #3 of 5 (4197 views)

Re: search IP address [In reply to]	Can't Post

thanks a lot Jean, the script does read the file now, and i don't get that strange number anymore. however, i still don't get a match on the IP address. help! before i lose all my hair !

thanks again in advance...

Jean
User

Mar 4, 2001, 12:09 AM

Post #4 of 5 (4189 views)

Re: search IP address [In reply to]	Can't Post

The regex that I've used in the example looks for the IP in the beginning of a line contained in $ipnum (not in the $line that contains the lines read from the file). I've left this because you said the code posted was just a part of larger program and it didn't show the contents of the $ipnum... You could use the following examples in order to change the behaviour of the example from my previous post:

1. $ipnum =~ /(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})/
Looks for an IP in all the $ipnum, not just in the beginning;
2. $line =~ /^\s*(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})/
Looks for an IP in the beginning if the $line that is,
in the beginning of each line of the file being read;
3. $line =~ /(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})/
Looks for an IP in all the $line that is,
IP will be found if it's contained ANYWHERE in the file;

Jean Spector
QA Engineer @ Extent Technologies, Ltd.
mage@lycosmail.com

judeski
Deleted

Mar 7, 2001, 10:14 AM

Post #5 of 5 (4183 views)

Re: search IP address [In reply to]	Can't Post

awesome ! thanks again...

Search for (options)

Web Applications & Managed Hosting Powered by Gossamer Threads
Visit our Mailing List Archives