82 lines
1.9 KiB
Perl
Executable File
82 lines
1.9 KiB
Perl
Executable File
#!/usr/bin/env perl
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#
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# Copyright (C) 2001-2022 Graeme Walker <graeme_walker@users.sourceforge.net>
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#
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# Copying and distribution of this file, with or without modification,
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# are permitted in any medium without royalty provided the copyright
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# notice and this notice are preserved. This file is offered as-is,
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# without any warranty.
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# ===
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#
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# emailrelay-set-from.pl
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#
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# An example E-MailRelay "--filter" script that edits the content originator
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# fields (ie. From, Sender and Reply-To) to a fixed value.
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#
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# See also: emailrelay-set-from.js, RFC-2822
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#
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use strict ;
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use FileHandle ;
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$SIG{__DIE__} = sub { (my $e = join(" ",@_)) =~ s/\n/ /g ; print "<<error: $e>>\n" ; exit 99 } ;
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# originator fields (RFC-2822 3.6.2)
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my $new_from = 'noreply@example.com' ;
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my $new_sender = '' ;
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my $new_reply_to = $new_from ;
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my $content = $ARGV[0] or die "usage error\n" ;
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my $in = new FileHandle( $content , "r" ) or die ;
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my $out = new FileHandle( "$content.tmp" , "w" ) or die ;
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my $in_body = undef ;
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my $in_edit = undef ;
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while(<$in>)
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{
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if( $in_body )
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{
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print $out $_ ;
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}
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else
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{
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chomp( my $line = $_ ) ;
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$line =~ s/\r$// ;
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$in_body = 1 if ( $line eq "" ) ;
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my $is_from = ( $line =~ m/^From:/i ) ;
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my $is_sender = ( $line =~ m/^Sender:/i ) ;
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my $is_reply_to = ( $line =~ m/^Reply-To:/i ) ;
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if( $in_body )
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{
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print $out "\r\n" ;
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}
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elsif( $is_from && defined($new_from) )
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{
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$in_edit = 1 ;
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print $out "From: $new_from\r\n" ;
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}
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elsif( $is_sender && defined($new_sender) )
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{
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$in_edit = 1 ;
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print $out "Sender: $new_sender\r\n" unless $new_sender eq "" ;
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}
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elsif( $is_reply_to && defined($new_reply_to) )
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{
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$in_edit = 1 ;
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print $out "Reply-To: $new_reply_to\r\n" ;
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}
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elsif( $in_edit && $line =~ m/^[ \t]/ ) # original header was folded
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{
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}
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else
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{
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$in_edit = undef ;
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print $out $line , "\r\n" ;
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}
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}
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}
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$out->close() or die ;
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rename( "$content.tmp" , $content ) or die ;
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exit 0 ;
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