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| #! /usr/bin/perl -w -T
#
# $Id: email.pl 1656 2008-02-14 12:51:56Z coelho $
#
# perl cgi script to send an email from a template, like "cgiemail".
# the configuration is managed by environment variables.
#
# env EMAIL_TMPL: mandatory template directory for email templates
# param template: mandatory template file name in directory
#
# param [-a-zA-Z0-9]+: substituted in template body, empty if not set
# param req(uired)?-[a-zA-Z0-9]+: mandatory parameter
#
# env EMAIL_HOST: mailhost, default to 'localhost'
# env EMAIL_FROM: mail from field, default to 'postmaster@EMAIL_HOST'
# env EMAIL_RQMS: message on missing required parameters
# env EMAIL_OKAY: success redirect (or Okay header)
# env EMAIL_FAIL: failure redirect (supersedes EMAIL_RQMS, or Fail header)
#
# TODO: check parameter sizes?
use strict;
use CGI;
my $q = new CGI;
my $okay = undef;
my $fail = undef;
my $error_param = undef;
eval # TRY
{
# get or set mail server
my $mailhost = "ns351403.ovh.net";
$mailhost = $ENV{EMAIL_HOST} if exists $ENV{EMAIL_HOST};
if ($mailhost =~ /^([-a-zA-Z0-9.]+)$/)
{
$mailhost = $1; # untaint
}
else
{
die "invalid mail host: $mailhost";
}
# get or set from
my $from = "postmaster\@$mailhost";
$from = $ENV{EMAIL_FROM} if exists $ENV{EMAIL_FROM};
if ($from =~ /^([-a-zA-Z0-9.]+\@[-a-zA-Z0-9.]+)$/)
{
$from = $1; # untaint
}
else
{
die "invalid from: $from";
}
# get template directory
#die "no environment var EMAIL_TMPL" unless exists $ENV{EMAIL_TMPL};
#my $tmpl_dir = $ENV{EMAIL_TMPL};
my $tmpl_dir = "/home/iifiir/cgi-bin/";
die "no such directory ($tmpl_dir)" unless -d $tmpl_dir;
# get template
die "no mandatory template parameter" unless $q->param('template');
my $tmpl = $q->param('template');
if ($tmpl =~ /^([-a-zA-Z0-9_.]+)$/)
{
$tmpl = $1; # untaint
}
else
{
die "invalid template parameter: $tmpl";
}
my $tmpl_file = $tmpl_dir . '/' . $tmpl;
die "no such template file ($tmpl_file)" unless -r $tmpl_file;
open TMPL, "<$tmpl_file" or die "cannot open template file $tmpl_file";
# first paragraph contains all mail headers
# must also deal with DOS conventions...
my $headers = '';
my $line;
while ($line = <TMPL>)
{
$headers .= $line;
last if $line =~ /^\r?\n$/s;
}
# everything else is the message body.
$/ = undef;
my $body = <TMPL>;
close TMPL or die "cannot close template file $tmpl_file";
# get one To/Cc/Bcc, but does not allow spaces in email addresses.
my @to = split /[\s,]+/, $1 if $headers =~ /^To:\s*(.*)/im;
push @to, split(/[\s,]+/, $1) if $headers =~ /^Cc:\s*(.*)/im;
push @to, split(/[\s,]+/, $1) if $headers =~ /^Bcc:\s*(.*)/im;
die "no email destination in template" unless @to;
# redirection put within template. superseedes env
$okay = $1 if $headers =~ /^Okay:\s*(\S+)/i;
$fail = $1 if $headers =~ /^Fail:\s*(\S+)/i;
# clean some headers
$headers =~ s/^(okay|fail|bcc):[^\n]*\n//gsi;
# handle subsitutions
my (@subs,%seen) = ();
while ($body =~ /\[([-A-Za-z0-9]+)\]/g)
{
push @subs, $1 unless $seen{$1}++;
}
undef %seen;
my %subst = ();
for my $param (@subs)
{
my $value = defined $q->param($param)? $q->param($param): '';
$value = $1 if $value =~ /(.*)/s; # untaint!
if ($param =~ /^req(uired)?-/ and $value eq '')
{
my $msg = 'mandatory parameter not set:';
$msg = $ENV{EMAIL_RQMS} if exists $ENV{EMAIL_RQMS};
$msg = $1 if $msg =~ /(.*)/; # untaint, just in case
$error_param = $param;
die "$msg '$param'";
}
# to be substituted later
$subst{$param} = $value;
}
# actual substitution performed *once* here, only in body
$body =~ s/\[([-A-Za-z0-9]+)\]/$subst{$1}/eg;
undef %subst;
# low level smtp
use Net::SMTP;
my $smtp = new Net::SMTP($mailhost);
$smtp->mail($from);
$smtp->to(@to);
$smtp->data();
$smtp->datasend($headers);
$smtp->datasend($body);
$smtp->dataend();
$smtp->quit();
# success?
if (defined $okay)
{
print $q->redirect($okay);
}
elsif (exists $ENV{EMAIL_OKAY})
{
print $q->redirect($ENV{EMAIL_OKAY});
}
else
{
print "Content-Type: text/plain\r\n\r\nmail sent.\n";
}
};
if ($@) # CATCH exceptions
{
warn "$@";
my $stuff = defined $error_param? "?param=$error_param": '';
if (defined $fail)
{
print $q->redirect($fail . $stuff);
}
elsif (exists $ENV{EMAIL_FAIL})
{
print $q->redirect($ENV{EMAIL_FAIL} . $stuff);
}
else
{
print "Content-Type: text/plain\r\n\r\nerror: $@\n";
}
} |
variable d'environnement perl
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