.\" -*- mode: troff; coding: utf-8 -*-
.\" Automatically generated by Pod::Man v6.0.2 (Pod::Simple 3.45)
.\"
.\" Standard preamble:
.\" ========================================================================
.de Sp \" Vertical space (when we can't use .PP)
.if t .sp .5v
.if n .sp
..
.de Vb \" Begin verbatim text
.ft CW
.nf
.ne \\$1
..
.de Ve \" End verbatim text
.ft R
.fi
..
.\" \*(C` and \*(C' are quotes in nroff, nothing in troff, for use with C<>.
.ie n \{\
.    ds C` ""
.    ds C' ""
'br\}
.el\{\
.    ds C`
.    ds C'
'br\}
.\"
.\" Escape single quotes in literal strings from groff's Unicode transform.
.ie \n(.g .ds Aq \(aq
.el       .ds Aq '
.\"
.\" If the F register is >0, we'll generate index entries on stderr for
.\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index
.\" entries marked with X<> in POD.  Of course, you'll have to process the
.\" output yourself in some meaningful fashion.
.\"
.\" Avoid warning from groff about undefined register 'F'.
.de IX
..
.nr rF 0
.if \n(.g .if rF .nr rF 1
.if (\n(rF:(\n(.g==0)) \{\
.    if \nF \{\
.        de IX
.        tm Index:\\$1\t\\n%\t"\\$2"
..
.        if !\nF==2 \{\
.            nr % 0
.            nr F 2
.        \}
.    \}
.\}
.rr rF
.\"
.\" Required to disable full justification in groff 1.23.0.
.if n .ds AD l
.\" ========================================================================
.\"
.IX Title "WWW::RobotRules::AnyDBM_File 3"
.TH WWW::RobotRules::AnyDBM_File 3 2026-05-23 "perl v5.42.2" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH NAME
WWW::RobotRules::AnyDBM_File \- Persistent RobotRules
.SH SYNOPSIS
.IX Header "SYNOPSIS"
.Vb 2
\&    require WWW::RobotRules::AnyDBM_File;
\&    require LWP::RobotUA;
\&
\&    # Create a robot useragent that uses a diskcaching RobotRules
\&    my $rules = WWW::RobotRules::AnyDBM_File\->new( \*(Aqmy\-robot/1.0\*(Aq, \*(Aqcachefile\*(Aq );
\&    my $ua = WWW::RobotUA\->new( \*(Aqmy\-robot/1.0\*(Aq, \*(Aqme@foo.com\*(Aq, $rules );
\&
\&    # Then just use $ua as usual
\&    $res = $ua\->request($req);
.Ve
.SH DESCRIPTION
.IX Header "DESCRIPTION"
This is a subclass of \fIWWW::RobotRules\fR that uses the AnyDBM_File
package to implement persistent diskcaching of \fIrobots.txt\fR and host
visit information.
.PP
The constructor (the \fBnew()\fR method) takes an extra argument specifying
the name of the DBM file to use.  If the DBM file already exists, then
you can specify undef as agent name as the name can be obtained from
the DBM database.
.SH "SECURITY CONSIDERATIONS"
.IX Header "SECURITY CONSIDERATIONS"
The caller\-supplied DBM filename must reside in a directory writable
only by the same user that runs this code. The underlying
\&\f(CW\*(C`AnyDBM_File\*(C'\fR backends open the file via the C \f(CWopen(2)\fR syscall
without \f(CW\*(C`O_NOFOLLOW\*(C'\fR, so a symlink at the cache path (or at its
\&\f(CW\*(C`.dir\*(C'\fR/\f(CW\*(C`.pag\*(C'\fR/\f(CW\*(C`.db\*(C'\fR siblings) will be followed and the linked
target may be overwritten with DBM page data. The cache file is
created with mode \f(CW0600\fR; callers that need different permissions
can \f(CW\*(C`chmod\*(C'\fR after construction.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
WWW::RobotRules, LWP::RobotUA
.SH AUTHORS
.IX Header "AUTHORS"
Hakan Ardo <hakan@munin.ub2.lu.se>, Gisle Aas <aas@sn.no>