/**
* Converts an ATOM encoded Salmon post to a SalmonEntry.
* @param string $atom_string The raw POST to the Salmon endpoint.
* @return SalmonEntry An object representing the information in the POST.
*/
public static function from_atom($atom_string)
{
$xml_parser = xml_parser_create('');
$xml_values = array();
$xml_tags = array();
if (!$xml_parser) {
return false;
}
xml_parser_set_option($xml_parser, XML_OPTION_TARGET_ENCODING, 'UTF-8');
xml_parser_set_option($xml_parser, XML_OPTION_CASE_FOLDING, 0);
xml_parser_set_option($xml_parser, XML_OPTION_SKIP_WHITE, 1);
xml_parse_into_struct($xml_parser, trim($atom_string), $xml_values);
xml_parser_free($xml_parser);
$entry = new SalmonEntry();
$breadcrumbs = array();
for ($i = 0; $atom = $xml_values[$i]; $i++) {
// Only process one entry. This could be generalized to a feed later.
if (strtolower($atom['tag']) == 'entry' && strtolower($atom['type']) == 'close') {
break;
}
// Keep a "breadcrumb" list of the tag hierarchy we're currently in.
$breadcrumbs[$atom['level']] = $atom['tag'];
// Parse individual attributes one at a time.
switch (strtolower($atom['tag'])) {
case 'id':
$entry->id = $atom['value'];
break;
case 'name':
if (SalmonEntry::parent_is($atom, 'author', $breadcrumbs)) {
$entry->author_name = $atom['value'];
}
break;
case 'uri':
if (SalmonEntry::parent_is($atom, 'author', $breadcrumbs)) {
$entry->author_uri = $atom['value'];
}
break;
case 'thr:in-reply-to':
$entry->thr_in_reply_to = $atom['value'];
break;
case 'content':
$entry->content = $atom['value'];
break;
case 'title':
$entry->title = $atom['value'];
break;
case 'updated':
$entry->updated = $atom['value'];
break;
case 'sal:signature':
$entry->salmon_signature = $atom['value'];
break;
}
}
$entry->webfinger = WebFingerAccount::from_acct_string($entry->author_uri);
return $entry;
}
/**
* Attempts to parse data sent to the Salmon endpoint and post it as a
* comment for the current blog.
*/
public static function parse_salmon_post()
{
// Allow cross domain JavaScript requests, from salmon-playground.
if (strtoupper($_SERVER['REQUEST_METHOD']) == "OPTIONS" && strtoupper($_SERVER['HTTP_ACCESS_CONTROL_REQUEST_METHOD']) == "POST") {
// See https://developer.mozilla.org/En/HTTP_access_control
header('HTTP/1.1 200 OK');
header('Access-Control-Allow-Origin: * ');
die;
}
//TODO(kurrik): Check that this always works, even if always_populate_raw_post_data is Off
$request_body = @file_get_contents('php://input');
$array = MagicSig::parse($request_body);
$entry = SalmonEntry::from_atom($array['data']);
// Validate the request if the option is set.
if (get_option('salmonpress_validate')) {
if ($entry->validate() === false) {
header('HTTP/1.1 403 Forbidden');
print "The posted Salmon entry's signature did not validate.";
die;
}
}
$commentdata = $entry->to_commentdata();
if ($commentdata === false) {
header('HTTP/1.1 400 Bad Request');
print "The posted Salmon entry was malformed.";
} else {
if (!isset($commentdata['user_id'])) {
if (get_option('comment_registration')) {
header('HTTP/1.1 403 Forbidden');
print "The blog settings only allow registered users to post comments.";
die;
}
} else {
wp_new_comment($commentdata);
header('HTTP/1.1 201 Created');
print "The Salmon entry was posted.";
}
}
die;
}