LivedoorにAtomPubで自動投稿する

public function post($f) {
$this->post_url = "https://livedoor.blogcms.jp/atompub/" . $this->to->xpcid . "/article";
$idname = explode("-", $this->to->xpcid);

//ブログアップロード
$created = date('Y-m-d\TH:i:s\Z');
$nonce = pack('H*', sha1(md5(time())));
$pass_digest = base64_encode(pack('H*', sha1($nonce . $created . $this->to->xpcpass)));
$wsse =
'UsernameToken Username="' . $idname[0] . '1", ' .
'PasswordDigest="' . $pass_digest . '", ' .
'Nonce="' . base64_encode($nonce) . '", ' .
'Created="' . $created . '"';

$cat_list = explode(",", $this->history->category);
$str = "";

foreach ($cat_list as $k => $category) {
if ($category != "") {
$str .= '<category term="' . $category . '"/>';
}
}

if ($this->to->draft == 1) {
$str .= "<app:control><app:draft>yes</app:draft></app:control>";

}
if ($f["thumb"] != null) {
$thumb = $f["thumb"]->target_url;
$body = mb_convert_encoding("<img src='" . $thumb . "' class='article_thumbnail' style='max-width:100%;'><br/>\n", "UTF-8", "auto");
} else {
$thumb = null;
$body = "";
}
$body .= mb_convert_encoding($this->childa($f["desc"]), "UTF-8", "auto");
$more = mb_convert_encoding($this->childa($f["more"]), "UTF-8", "auto");
$text64 = base64_encode($body . $more);
$rawdata =
'<?xml version="1.0" encoding="UTF-8"?>' .
'<entry xmlns="http://purl.org/atom/ns#" xmlns:app="http://www.w3.org/2007/app">' .
'<title type="text/html" mode="escaped">' . $this->history->title . '</title>' .
'<content type="application/xhtml+xml" mode="base64">' . $text64 . '</content>' .
// '<content type="application/xhtml+xml" mode="base64">'.$body_text.'</content>'.
$str . '</entry>';
$headers = array(
'X-WSSE: ' . $wsse,
'Expect:',
);
try {
$req = new HTTP_Request2();
$req->setUrl($this->post_url);
$req->setConfig(array('ssl_verify_host' => false, //* 下記参照
'ssl_verify_peer' => false, //* 下記参照
));

$req->setMethod(HTTP_Request2::METHOD_POST);
$req->setHeader($headers);
$req->setAuth($idname[0], $this->to->xpcpass);
$req->setBody($rawdata);
$response = $req->send();

$arr = (array) $response;

$return = $response->getBody();
if ($return == "Requested XML is invalid.") {
return ["error" => "requested XML is invalid"];
} else {
if (isset($response->getHeader()["location"])) {
return ["id" => $response->getHeader()["location"]];
} else {
return ["error" => $return];
}
}
} catch (HTTP_Request2_Exception $e) {
return ["error" => $e->getMessage()];
} catch (Exception $e) {
return ["error" => $e->getMessage()];
}

}

出典：code