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|
#!/usr/bin/perl
# getskyepg.pl: Get EPG data for Sky channels from the Internet
#
# Connects to a running VDR instance via SVDRP, gets the channel data
# for the Sky channels and connects to Internet web pages to extract the
# EPG data for these channels. The result is sent to VDR via SVDRP.
#
# See the README file for copyright information and how to reach the author.
#
# $Id: getskyepg.pl 1.3 2004/02/15 13:35:52 kls Exp $
use Getopt::Std;
use Time::Local;
$Usage = qq{
Usage: $0 [options]
Options: -c filename channel config file name (default: channels.conf.sky)
-d hostname destination hostname (default: localhost)
-p port SVDRP port number (default: 2001)
-S source channel source (default: S28.2E)
-D days days to get EPG for (1..7, default: 2)
};
die $Usage if (!getopts("c:d:D:hp:S:") || $opt_h);
$Conf = $opt_c || "channels.conf.sky";
$Dest = $opt_d || "localhost";
$Port = $opt_p || 2001;
$Source = $opt_S || "S28.2E";
$Days = $opt_D || 2;
$SkyWebPage = "www.bleb.org/tv/data/listings";
$WGET = "/usr/bin/wget -q -O-";
$LOGGER = "/usr/bin/logger -t SKYEPG";
$DST = -3600; # Daylight Saving Time offset
$SecsInDay = 86400;
@Channels = ();
$idxSource = 0;
$idxNumber = 1;
$idxName = 2;
Error("days out of range: $Days") unless (1 <= $Days && $Days <= 7);
sub Log
{
system("$LOGGER '@_'");
}
sub Error
{
Log(@_);
die "$0: @_\n";
}
sub GetChannels
{
open(CHANNELS, $Conf) || Error("$Conf: $!");
while (<CHANNELS>) {
chomp;
next if (/^#/);
my @a = split(":");
push(@Channels, [@a]) unless ($a[$idxName] eq "x");
}
close(CHANNELS);
}
GetChannels();
sub GetPage
{
my $channel = shift;
my $day = shift;
$day--;
my $url = "$SkyWebPage/$day/$channel.xml";
Log("reading $url");
my @page = split("\n", `$WGET '$url'`);
Log("received " . ($#page + 1) . " lines");
return @page;
}
sub StripWhitespace
{
my $s = shift;
$s =~ s/\s*(.*)\s*/$1/;
$s =~ s/\s+/ /g;
return $s;
}
sub Extract
{
my $s = shift;
my $t = shift;
$s =~ /<$t>([^<]*)<\/$t>/;
return StripWhitespace($1);
}
# In order to get the duration we need to buffer the last event:
$Id = "";
$Time = 0;
$Title = "";
$Subtitle = "";
$Desc = "";
sub GetEpgData
{
my ($channel, $channelID) = @_;
my $numEvents = 0;
SVDRPsend("C $channelID");
$Time = 0;
for $day (1 .. $Days) {
my $dt = 0;
my @page = GetPage($channel, $day);
my $data = "";
for $line (@page) {
chomp($line);
if ($line =~ /<programme>/) {
$data = "";
}
elsif ($line =~ /<\/programme>/) {
my $title = Extract($data, "title");
my $subtitle = Extract($data, "subtitle");
my $desc = Extract($data, "desc");
my $start = Extract($data, "start");
# 'end' is useless, because it is sometimes missing :-(
# my $end = Extract($data, "end");
if (!$subtitle) {
# They sometimes write all info into the description, as in
# Episode: some description.
# Why don't they just fill in the data correctly?
my ($s, $d) = ($desc =~ /([^:]*)[:](.*)/);
if ($s && $d) {
$subtitle = $s;
$desc = $d;
}
}
# 'start' and 'end' as time of day isn't of much use here, since
# the page for one day contains data that actually belongs to the
# next day (after midnight). Oh well, lets reconstruct the missing
# information:
$start = "0" . $start if (length($start) < 4);
my ($h, $m) = ($start =~ /(..)(..)/);
$dt = $SecsInDay if ($h > 12);
# convert to time_t:
my @gmt = gmtime;
$gmt[0] = 0; # seconds
$gmt[1] = $m; # minutes
$gmt[2] = $h; # hours
$time = timegm(@gmt) + ($day - 1) * $SecsInDay + ($h < 12 ? $dt : 0);
# comensate for DST:
$time += $DST if (localtime($time))[8];
# create EPG data:
if ($Time) {
$duration = $time - $Time;
SVDRPsend("E $Id $Time $duration");
SVDRPsend("T $Title");
SVDRPsend("S $Subtitle");
SVDRPsend("D $Desc");
SVDRPsend("e");
$numEvents++;
}
# buffer the last event:
$Id = $time / 60 % 0xFFFF; # this gives us unique ids for every minute of over 6 weeks
$Time = $time;
$Title = $title;
$Subtitle = $subtitle;
$Desc = $desc;
}
else {
$data .= $line;
}
}
}
SVDRPsend("c");
Log("generated $numEvents EPG events");
}
sub ProcessEpg
{
for (@Channels) {
my $channel = @$_[$idxName];
my $channelID = @$_[$idxSource];
Log("processing channel $channel - $channelID");
SVDRPsend("PUTE");
SVDRPreceive(354);
GetEpgData($channel, $channelID);
SVDRPsend(".");
SVDRPreceive(250);
}
Log("done");
}
#---------------------------------------------------------------------------
# TODO: make this a Perl module??? What about Error()???
use Socket;
$Timeout = 300; # max. seconds to wait for response
$SIG{ALRM} = sub { Error("timeout"); };
alarm($Timeout);
$iaddr = inet_aton($Dest) || Error("no host: $Dest");
$paddr = sockaddr_in($Port, $iaddr);
$proto = getprotobyname('tcp');
socket(SOCK, PF_INET, SOCK_STREAM, $proto) || Error("socket: $!");
connect(SOCK, $paddr) || Error("connect: $!");
select(SOCK); $| = 1;
SVDRPreceive(220);
ProcessEpg();
SVDRPsend("QUIT");
sub SVDRPsend
{
my $s = shift;
print SOCK "$s\r\n";
}
sub SVDRPreceive
{
my $expect = shift | 0;
my @a = ();
while (<SOCK>) {
s/\s*$//; # 'chomp' wouldn't work with "\r\n"
push(@a, $_);
if (substr($_, 3, 1) ne "-") {
my $code = substr($_, 0, 3);
Error("expected SVDRP code $expect, but received $code") if ($code != $expect);
last;
}
}
return @a;
}
#---------------------------------------------------------------------------
|
