yolanda/branches/old-perl/trunk/video.pl
erlehmann f2b388baca branching ...
git-svn-id: http://yolanda.mister-muffin.de/svn@360 7eef14d0-6ed0-489d-bf55-20463b2d70db
2008-07-31 19:10:25 +00:00

325 lines
14 KiB
Perl

require "functions.pl";
#initialize session data
CGI::Session->name($config->{"page_cookie_name"});
$query = new CGI;
$session = new CGI::Session;
@userinfo = get_userinfo_from_sid($session->id);
my $doc = XML::LibXML::Document->new( "1.0", "UTF-8" );
my $page = get_page_array(@userinfo);
$page->setNamespace( $config->{"xml_namespace_cc"}, "cc", 0);
$page->setNamespace( $config->{"xml_namespace_dc"}, "dc", 0);
$page->setNamespace( $config->{"xml_namespace_rdf"}, "rdf", 0);
#check if id or title is passed
if($query->url_param('id'))
{
#initiate database query
$dbquery = "select v.id, v.title, v.description, u.username, from_unixtime( v.timestamp ),
v.creator, v.subject, v.source, v.language, v.coverage, v.rights,
v.license, filesize, duration, width, height, fps, viewcount, downloadcount
from videos as v, users as u where v.id = ? and u.id=v.userid";
@args = ($query->url_param('id'));
$sth = $dbh->prepare($dbquery);
#test wether the video exists
$rowcount = $sth->execute(@args) or die $dbh->errstr;
#if there are no results
if($rowcount == 0)
{
#check if maybe the video has not yet been converted
$dbquery = "select id from uploaded where id = ?";
$sth = $dbh->prepare($dbquery);
$rowcount = $sth->execute($query->url_param('id')) or die $dbh->errstr;
#if id is found
if($rowcount == 1)
{
#calculate the overall length of video to be encoded
$sth = $dbh->prepare("select sum(duration) from uploaded where id < ?");
$sth->execute($query->url_param('id')) or die $dbh->errstr;
($length) = $sth->fetchrow_array();
#convert hours, minutes and seconds fromoverall seconds
$h = int($length/3600);
$m = int($length/60-$h*60);
$s = int($length-$m*60-$h*3600);
print $query->redirect("/index.pl?information=information_video_not_yet_available&value=".$h."h ".$m."m ".$s."s");
}
else
{
# there is nothing we can do now - this video doesn't exist...
print $query->redirect("/index.pl?error=error_no_video");
# this is a typical 404 situation, why is there no 404 ?
}
}
elsif($rowcount == 1)
{
#set embed attribute if requested
if($query->param('embed') eq "video")
{
$page->setAttribute( "embed", "video" );
}
elsif($query->param('embed') eq "preview")
{
$page->setAttribute( "embed", "preview" );
}
#if there was a single result, display the video
my ($id, $title, $description, $publisher, $timestamp, $creator, $subject,
$source, $language, $coverage, $rights, $license,
$filesize, $duration, $width, $height, $fps, $viewcount, $downloadcount) = $sth->fetchrow_array();
#finish query
$sth->finish() or die $dbh->errstr;
#if user is logged in
if($userinfo->{'username'})
{
#check if a comment is about to be created
if($query->param('comment'))
{
#prepare new dtd
my $dtd = XML::LibXML::Dtd->new(0, "$root/site/comment.dtd");
$dom = XML::LibXML->new;
$dom->clean_namespaces(1);
#try to parse user's comment
eval { $doc = $dom->parse_string("<comment>".$query->param('comment')."</comment>") };
#die if error
if ($@)
{
die $@;
}
else
{
#try to validate against dtd
eval { $doc->validate($dtd) };
#die if error
if ($@)
{
die $@;
}
else
{
#output infobox
$page->appendChild(message("information", "information_comment_created"));
#add to database
$dbh->do(qq{insert into comments (userid, videoid, text, timestamp) values (?, ?, ?, unix_timestamp())}, undef,
$userinfo->{'id'}, $id, $query->param('comment')) or die $dbh->errstr;
#send pingbacks to every url in the comment
my (@matches) = $query->param('comment') =~ /<a\s[^>]*href="(http:\/\/\S+)"[^>]*>.+?<\/a>/gi;
#for every match send a pingback
foreach $match (@matches)
{
#ask for http header only - if pingbacks are implemented right, then we wont need the full site
my $request = HTTP::Request->new(HEAD => $match);
my $ua = LWP::UserAgent->new;
my $response = $ua->request($request);
#if successful response
if ($response->is_success)
{
my $pingbackurl = $response->header("x-pingback");
#if there was no x-pingback header, fetch the website and search for link element
if (!$pingbackurl)
{
$request = HTTP::Request->new(GET => $match);
$response = $ua->request($request);
#get the link if response was successful
if ($response->is_success)
{
($pingbackurl) = $response->content =~ /<link rel="pingback" href="([^"]+)" ?\/?>/;
}
}
#if requests were successful, send the pingbacks
if ($pingbackurl)
{
#TODO: expand xml entities &lt; &gt; &amp; &quot; in $pingbackurl
#contruct the xml-rpc request
#TODO: do this with xml::libxml
my $xmlpost = ();
$xmlpost->{"methodName"} = ["pingback.ping"];
push @{$xmlpost->{'params'}->{'param'} },
{
"value" =>
{
"string" => [$config->{"url_root"}."/video/".urlencode($title)."/$id/"]
}
};
push @{$xmlpost->{'params'}->{'param'} },
{
"value" =>
{
"string" => [$match]
}
};
#post a xml-rpc request
$request = HTTP::Request->new(POST => $pingbackurl);
$request->header('Content-Type' => "application/xml");
$request->content(XMLout(
$xmlpost,
XMLDecl => 1,
KeyAttr => {},
RootName => 'methodCall'
));
$ua = LWP::UserAgent->new;
$response = $ua->request($request);
#TODO: maybe do something on success?
}
}
}
}
}
}
}
#construct video xml
my $video = XML::LibXML::Element->new( "video" );
$video->setAttribute('thumbnail', $config->{"url_root"}."/video-stills/thumbnails/$id");
$video->setAttribute('preview', $config->{"url_root"}."/video-stills/previews/$id");
$video->setAttribute('filesize', $filesize);
$video->setAttribute('duration', $duration);
$video->setAttribute('width', $width);
$video->setAttribute('height', $height);
$video->setAttribute('fps', $fps);
$video->setAttribute('viewcount', $viewcount);
$video->setAttribute('downloadcount', $downloadcount);
my $rdf = XML::LibXML::Element->new( "RDF" );
$rdf->setNamespace("http://www.w3.org/1999/02/22-rdf-syntax-ns#", "rdf");
my $work = XML::LibXML::Element->new( "Work" );
$work->setNamespace( "http://web.resource.org/cc/", "cc");
$work->setNamespace( "http://www.w3.org/1999/02/22-rdf-syntax-ns#", "rdf", 0);
$work->setAttributeNS( "http://www.w3.org/1999/02/22-rdf-syntax-ns#", "about", $config->{"url_root"}."/download/$id/" );
$node = XML::LibXML::Element->new( "coverage" );
$node->setNamespace( "http://purl.org/dc/elements/1.1/", "dc" );
$node->appendText($coverage);
$work->appendChild($node);
$node = XML::LibXML::Element->new( "creator" );
$node->setNamespace( "http://purl.org/dc/elements/1.1/", "dc" );
$node->appendText($creator);
$work->appendChild($node);
$node = XML::LibXML::Element->new( "date" );
$node->setNamespace( "http://purl.org/dc/elements/1.1/", "dc" );
$node->appendText($date);
$work->appendChild($node);
$node = XML::LibXML::Element->new( "description" );
$node->setNamespace( "http://purl.org/dc/elements/1.1/", "dc" );
$node->appendText($description);
$work->appendChild($node);
$node = XML::LibXML::Element->new( "identifier" );
$node->setNamespace( "http://purl.org/dc/elements/1.1/", "dc" );
$node->appendText($config->{"url_root"}."/video/".urlencode($title)."/$id/");
$work->appendChild($node);
$node = XML::LibXML::Element->new( "language" );
$node->setNamespace( "http://purl.org/dc/elements/1.1/", "dc" );
$node->appendText($language);
$work->appendChild($node);
$node = XML::LibXML::Element->new( "publisher" );
$node->setNamespace( "http://purl.org/dc/elements/1.1/", "dc" );
$node->appendText($publisher);
$work->appendChild($node);
$node = XML::LibXML::Element->new( "rights" );
$node->setNamespace( "http://purl.org/dc/elements/1.1/", "dc" );
$node->appendText($rights);
$work->appendChild($node);
$node = XML::LibXML::Element->new( "source" );
$node->setNamespace( "http://purl.org/dc/elements/1.1/", "dc" );
$node->appendText($source);
$work->appendChild($node);
$node = XML::LibXML::Element->new( "subject" );
$node->setNamespace( "http://purl.org/dc/elements/1.1/", "dc" );
$node->appendText($subjcet);
$work->appendChild($node);
$node = XML::LibXML::Element->new( "title" );
$node->setNamespace( "http://purl.org/dc/elements/1.1/", "dc" );
$node->appendText($title);
$work->appendChild($node);
#TODO: add license conditions
my $license = XML::LibXML::Element->new( "License" );
$license->setNamespace("http://web.resource.org/cc/", "cc");
$license->setNamespace("http://www.w3.org/1999/02/22-rdf-syntax-ns#", "rdf", 0);
$license->setAttributeNS( "http://www.w3.org/1999/02/22-rdf-syntax-ns#", "about", "http://creativecommons.org/licenses/GPL/2.0/" );
$rdf->appendChild($work);
$rdf->appendChild($license);
$video->appendChild($rdf);
$page->appendChild($video);
#get comments - this will also include newly created comments
my $comments = XML::LibXML::Element->new( "comments" );
$sth = $dbh->prepare(qq{select comments.id, comments.text, users.username, from_unixtime( comments.timestamp )
from comments, users where
comments.videoid=? and users.id=comments.userid}) or die $dbh->errstr;
$sth->execute($id) or die $dbh->errstr;
#for every comment in the db
while (my ($commentid, $text, $username, $timestamp) = $sth->fetchrow_array())
{
#create new xml node
my $dom = XML::LibXML->new;
#parse database string to xml
my $doc = $dom->parse_string("<comment>".$text."</comment>");
my $comment = $doc->documentElement();
#add xhtml namespace prefix to every node
foreach $node ($comment->getElementsByTagName("*"))
{
$node->setNamespace("http://www.w3.org/1999/xhtml", "xhtml");
}
$comment->setAttribute('username', $username);
$comment->setAttribute('timestamp', $timestamp);
$comment->setAttribute('id', $commentid);
$comments->appendChild($comment);
}
$page->appendChild($comments);
$doc->setDocumentElement($page);
output_page($doc);
}
}
else
{
print $query->redirect("index.pl?error=error_202c");
}