yolanda/trunk/pingback.pl
erlehmann 1ad9f63be7 lolol ?
git-svn-id: http://yolanda.mister-muffin.de/svn@359 7eef14d0-6ed0-489d-bf55-20463b2d70db
2008-07-30 22:36:00 +00:00

155 lines
5.7 KiB
Prolog

require "functions.pl";
#initialize session data
CGI::Session->name($config->{"page_cookie_name"});
$query = new CGI;
$session = new CGI::Session;
#we receive a POST request (this MUST contain a content/type definiton to be recognized)
if ($query->param("POSTDATA"))
{
#use xml::simple to process rpc request
eval { my $xmlpost = XMLin($query->param("POSTDATA"), ForceArray => 0, KeyAttr => 0) };
#if everything worked
if (!$@)
{
#set internal variables
my $method = $xmlpost->{"methodName"};
my $source = $xmlpost->{"params"}->{"param"}[0]->{"value"}->{"string"};
my $target = $xmlpost->{"params"}->{"param"}[1]->{"value"}->{"string"};
#if this is really a pingback rpc request
if ($method eq "pingback.ping")
{
#if there are valid target and source nodes
if ($source =~ /^http:\/\// and $target =~ /^http:\/\//)
{
#fetch the source URI to verify that the source does indeed link to the target.
my $request = HTTP::Request->new(GET => $source);
my $ua = LWP::UserAgent->new;
my $response = $ua->request($request);
#if the url indeed exists
if ($response->is_success)
{
#TODO: sanitize regex to grep site content
if (my ($text) = $response->content =~ m/(\S*.{0,17}$target.{0,17}\S*)/)
{
#check data to ensure that the target exists and is a valid entry.
my ($vid) = $target =~ /^$config->{'url_root'}\/video\/.*\/(\d+)\/.*/;
#query database if we have such a video
my $sth = $dbh->prepare("select id from videos where id = ? limit 1");
my $rowcount = $sth->execute($vid) or die $dbh->errstr;
$sth->finish() or die $dbh->errstr;
#if we have what the client wants to ping
if ($rowcount)
{
#check that the pingback has not already been registered.
$sth = $dbh->prepare("select id from pingbacks where videoid = ? limit 1");
$rowcount = $sth->execute($vid) or die $dbh->errstr;
$sth->finish() or die $dbh->errstr;
#if this is a new request
if ($rowcount eq "0E0")
{
#record the pingback.
$dbh->do(qq{insert into pingbacks (source, videoid, text, timestamp) values (?, ?, ?, unix_timestamp())}, undef,
$source, $vid, $text) or die $dbh->errstr;
#construct xml::simple hash
my $xml = ();
$xml->{'params'}->{'param'}->{'value'}->{'string'} = ["Pingback from $source to $target registered. Keep the web talking! :-)"];
print $session->header(
-type=>'application/xml',
-charset=>'UTF-8',
);
print XMLout(
$xml,
XMLDecl => 1,
KeyAttr => {},
RootName => 'methodResponse'
);
}
else
{
send_error(48, "The pingback has already been registered.");
}
}
else
{
send_error(33, "The specified target URI cannot be used as a target.");
}
}
else
{
send_error(17, "The source URI does not contain a link to the target URI, and so cannot be used as a source.");
}
}
else
{
send_error(16, "The source URI does not exist.");
}
}
else
{
send_error(-32602, "server error. invalid method parameters");
}
}
else
{
send_error(-32601, "server error. requested method not found");
}
}
else
{
send_error(-32700,"parse error. not well formed");
}
}
else
{
print $session->header;
print "XML-RPC server only accepts POST requests with http content-type defined.";
}
sub send_error
{
my ($faultCode, $faultString) = @_;
#construct xml::simple hash
my $xml = ();
push @{$xml->{'fault'}->{'value'}->{'struct'}->{'member'}},
{
"name" => ["faultCode"],
"value" =>
{
"int" => [$faultCode]
}
};
push @{$xml->{'fault'}->{'value'}->{'struct'}->{'member'}},
{
"name" => ["faultString"],
"value" =>
{
"string" => [$faultString]
}
};
print $session->header(
-type=>'application/xml',
-charset=>'UTF-8',
);
print XMLout(
$xml,
XMLDecl => 1,
KeyAttr => {},
RootName => 'methodResponse'
);
}