function ewiki_pingback_rpc($source_url, $target_url)
{
global $ewiki_config;
#-- does the target URL refer to a known WikiPage ?
$id = ewiki_url2id($target_url);
if (!$id) {
xmlrpc_send_response(xmlrpc_error(0x21, "Could not determine PageName for the given target URL."));
}
if (!($data = ewiki_db::GET($id))) {
xmlrpc_send_response(xmlrpc_error(0x20, "The given target page does not exist."));
}
#-- check if the caller really has a link as he claims
ini_set("user_agent", $ewiki_config["ua"]);
if (strpos($source_url, "http://") === 0 && ($test = ewiki_http_asis($source_url, 96256))) {
$test = strtolower($test);
$test_url = strtolower($target_url);
if (!strpos($test, $test_url) and !strpos($test, htmlentities($test_url))) {
return xmlrpc_error(0x11, "Sorry, but couldn't find a link to '{$target_url}' on your given '{$source_url}' page.");
}
} else {
return xmlrpc_error(0x10, "Your given source URL does not exist, could not be retrieved.");
}
#-- reject other frivolous links
if (preg_match('#^http://[^/]+/?$#', $source_url)) {
return xmlrpc_error(0x11, "Rejected '{$source_url}' as frivolous.");
}
#-- check write permissions
if (EWIKI_DB_F_TEXT != $data["flags"] & EWIKI_DB_F_TYPE or $data["flags"] & EWIKI_DB_F_READONLY) {
return xmlrpc_error(0x31, "Sorry, but this page is write-protected or not a system page.");
}
#-- already on page
if (strpos($data["content"], $source_url)) {
return xmlrpc_error(0x30, "The given link does already exist on this page.");
}
#-- other go-away cases
if (function_exists("ewiki_banned_url") && ewiki_banned_url($source_url) || function_exists("ewiki_blocked_url") && ewiki_blocked_url($source_url)) {
return xmlrpc_error(0x100, "Your link is unwanted here (registered on BlockedLinks or BannedLinks).");
}
#-- else update page
$data["content"] = rtrim($data["content"]) . "\n* {$source_url} (PingBack)\n";
ewiki_db::UPDATE($data);
$data["version"]++;
$ok = ewiki_db::WRITE($data);
#-- fin response
if ($ok) {
return "Link to '{$source_url}' was added to page '{$id}'.";
} else {
return xmlrpc_error(0x101, "Seems like a database/writing error occoured.");
}
}
function send()
{
$error = xmlrpc_compact_value(array("faultCode" => $no, "faultString" => $str));
$resp = array("methodResponse" => array("fault" => $error));
xmlrpc_send_response($resp);
}