perlmail-submit

   1 #! /usr/bin/perl
   2 #
   3 #       $Id$
   4 # Copyright (C) 2002-2003 Jan Kratochvil <project-PerlMail@jankratochvil.net>
   5 #
   6 # This program is free software; you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation; either version 2 of the License, or
   9 # (at your option) any later version.
  10 #
  11 # This program is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 # GNU General Public License for more details.
  15 #
  16 # You should have received a copy of the GNU General Public License
  17 # along with this program; if not, write to the Free Software
  18 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19
  20
  21 use vars qw($VERSION);
  22 $VERSION=do { my @r=(q$Revision$=~/\d+/g); sprintf "%d.".("%03d"x$#r),@r; };
  23 use strict;
  24 use warnings;
  25
  26 use File::Basename;
  27 BEGIN {
  28         use lib $ENV{"PERLMAIL_BASEDIR"} || File::Basename::dirname($0);
  29         use PerlMail::Config;
  30         }
  31
  32 use Getopt::Long;
  33 use DBI;
  34 use Carp qw(cluck confess);
  35 require IO::Socket::INET;
  36 use IO::Handle;
  37 use POSIX qw(mktime);
  38 use Fcntl qw(:flock);
  39
  40
  41 open DBI_PWD,$DBI_pwd or die "open \"$DBI_pwd\": $!";
  42 $DBI_pwd=<DBI_PWD>;
  43 close DBI_PWD or warn "close DBI_pwd: $!";
  44 chomp $DBI_pwd;
  45
  46 my $DBI;
  47 sub DBI
  48 {
  49         return $DBI if $DBI;
  50         $DBI=DBI->connect("DBI:mysql:database=$DBI_database;host=","$DBI_user",$DBI_pwd,{
  51                 "PrintError"=>0,        # handled by "RaiseError" below
  52                 "RaiseError"=>1,
  53                 "ShowErrorStatement"=>1,
  54                 "AutoCommit"=>1,
  55                 }) or confess "Failed DBI->connect(): $!";
  56         return $DBI;
  57 }
  58
  59 # $name,@$cols
  60 sub create_table
  61 {
  62 my($name,$cols)=@_;
  63
  64         eval { DBI()->do("drop table $name"); };
  65         DBI()->do("create table $name (".join(",",@$cols).")");
  66 }
  67
  68 sub initdb
  69 {
  70         create_table($DB_table,[
  71                                         "id int not null auto_increment primary key",
  72                                         "time timestamp not null",      # assume ." default now()"
  73                                         "message longtext not null",
  74                                         "retries int null default 0",   # null=>done, 0=not yet tried to submit
  75                                         ],
  76                         );
  77         DBI()->do("alter table $DB_table add index (retries,id)");
  78         print "done.\n";
  79         exit 0;
  80 }
  81
  82 sub store
  83 {
  84         my $message;
  85         {
  86                 local $/;
  87                 $message=<STDIN>;
  88                 }
  89         close STDIN or cluck "close STDIN: $!";
  90         my %row=(
  91                         "message"=>$message,
  92                         # assume "retries"=>0,
  93                         );
  94         my $prep=DBI()->prepare("insert into $DB_table (".join(",",keys(%row)).")"
  95                         ." values (".join(",",map("?",keys(%row))).")");
  96         $prep->execute(values(%row));
  97         print $prep->{"mysql_insertid"}."\n";
  98 }
  99
 100 sub forkoff
 101 {
 102         my $pid=fork();
 103         confess if !defined $pid;
 104         $DBI=undef();   # Prevent: Server has gone away
 105         exit 0 if $pid; # parent
 106         # child
 107 }
 108
 109 my $submitonce_run=0;
 110 sub submitonce
 111 {
 112         $submitonce_run++;
 113         local *LOCK;
 114         open LOCK,">>$Lock_pathname" or die "open-append \"$Lock_pathname\": $!";
 115         if (!flock LOCK,LOCK_EX|LOCK_NB) {
 116                 # NEVER unlink here, we are not the lock owning process!
 117                 print "LOCKED\n";
 118                 exit 0;
 119                 }
 120         my $sth=DBI()->prepare("select id,message from $DB_table where retries is not null"
 121                         # process only non-problematic mails during rerun
 122                         .($submitonce_run==1 ? "" : " and retries=0")
 123                         ." order by retries asc,id asc");
 124         $sth->execute();
 125         my $progresschar="";
 126         autoflush STDOUT 1;
 127         my $sock;
 128         while (my $row=$sth->fetchrow_hashref()) {
 129                 DBI()->do("update $DB_table set retries=retries+1 where id=".$row->{"id"});
 130                 if (!$sock) {
 131                         $sock=IO::Socket::INET->new(
 132                                         "PeerAddr"=>$PeerAddr,
 133                                         "Proto"   =>"tcp",
 134                                         ) or confess "IO::Socket::INET->new(\"$PeerAddr\"): $!";
 135                         $sock->connected() or confess "socket not connected";
 136                         }
 137                 $sock->printflush(length($row->{"message"})."\n".$row->{"message"});
 138                 alarm $Socket_timeout and $sock->timeout($Socket_timeout) if $Socket_timeout;
 139                 my $got;
 140                 my $gotlen=$sock->sysread($got,1);
 141                 confess $row->{"id"}.": sysread(1)=".(!defined $gotlen ? "undef" : $gotlen).": $!"
 142                                 if !defined($gotlen) || $gotlen!=1;
 143                 alarm 0;
 144                 if ($got ne "1") {
 145                         # Prevent mailing errors from cron invoking us etc.
 146                         #print STDERR "FAIL:".$row->{"id"}."\n";
 147                         undef $sock;
 148                         }
 149                 else {
 150                         DBI()->do("update $DB_table set retries=null where id=".$row->{"id"});
 151                         }
 152                 print $progresschar.$row->{"id"}.($got eq "1" ? "" : "=FAIL");
 153                 $progresschar=",";
 154                 }
 155         if ($sock) {
 156                 $sock->shutdown(0);     # stopped reading
 157                 $sock->printflush("BYE\n");
 158                 $sock->shutdown(2);     # stopped using
 159                 undef $sock;
 160                 }
 161         print "\n" if $progresschar;
 162         unlink $Lock_pathname;
 163         close LOCK;
 164         return $progresschar;
 165 }
 166
 167 sub submit
 168 {
 169         1 while submitonce();
 170 }
 171
 172 sub print_messages
 173 {
 174 my($cond)=@_;
 175
 176         my $sth=DBI()->prepare("select message from $DB_table $cond order by id");
 177         $sth->execute();
 178         while (my $row=$sth->fetchrow_hashref()) {
 179                 print $row->{"message"},"\n";
 180                 }
 181 }
 182
 183 sub pending
 184 {
 185         print_messages("where retries is not null");
 186 }
 187
 188 sub dump
 189 {
 190         print_messages("");
 191 }
 192
 193 sub clean
 194 {
 195 my($keyword,$interval)=@_;
 196
 197         # FIXME: SQL "now()" is raced against the block above
 198         my $sth=DBI()->prepare("select id,time,retries from $DB_table where time>now()");
 199         $sth->execute();
 200         while (my $row=$sth->fetchrow_hashref()) {
 201                 warn "Message time in future: ".join(",",map(
 202                                 "$_=".(!defined $row->{$_} ? "NULL" : $row->{$_})
 203                                 ,keys(%$row)));
 204                 }
 205
 206         return if $interval eq "";
 207         local $_=$interval;
 208         my $print=s/^print://;
 209         s/(\d+)y/($1*12)."m"/ge;
 210         s/(\d+)m/($1*30)."d"/ge;
 211         s/(\d+)d/($1*24)."h"/ge;
 212         s/(\d+)h/($1*60)."M"/ge;
 213         s/(\d+)M/($1*60)."s"/ge;
 214         my $sec=0;
 215         $sec+=$1 while s/(\d+)s//g;
 216         die "Interval parse error; left \"$_\", parsed: $interval" if $_ ne "";
 217         $sth=DBI()->prepare(($print ? "select id" : "delete")
 218                         ." from $DB_table where retries is null and time<from_unixtime(unix_timestamp()-$sec)");
 219         $sth->execute();
 220         if (!$print) {
 221                 print $sth->rows()."\n";
 222                 }
 223         else {
 224                 while (my $row=$sth->fetchrow_hashref()) {
 225                         print $row->{"id"},"\n";
 226                         }
 227                 }
 228 }
 229
 230
 231 $Getopt::Long::ignorecase=0;
 232 die if !GetOptions(
 233                   "initdb" ,\&initdb,
 234                   "store"  ,\&store,
 235                   "forkoff",\&forkoff,
 236                   "submit" ,\&submit,
 237                   "pending",\&pending,
 238                   "dump"   ,\&dump,
 239                   "clean:s",\&clean,
 240                 "V|version",sub { print "perlmail-submit: $VERSION\n"; exit 0; },
 241                 );
 242 exit 0;