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<?php defined("SYSPATH") or die("No direct script access.");
/**
* Gallery - a web based photo album viewer and editor
* Copyright (C) 2000-2008 Bharat Mediratta
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
*/
class akismet_Core {
// Lets not send everything to Akismet
private static $white_list = array(
"HTTP_USER_AGENT",
"HTTP_ACCEPT", "HTTP_ACCEPT_CHARSET", "HTTP_ACCEPT_ENCODING",
"HTTP_ACCEPT_LANGUAGE", "HTTP_CONNECTION", "HTTP_HOST",
"HTTP_KEEP_ALIVE", "HTTP_REFERER", "HTTP_USER_AGENT", "QUERY_STRING",
"REMOTE_ADDR", "REMOTE_HOST", "REMOTE_PORT" );
public static function get_configure_form() {
$form = new Forge("admin/akismet", "", "post");
$group = $form->group("configure_akismet")->label(_("Configure Akismet"));
$group->input("api_key")->label(_("API Key"))->value(module::get_var("akismet", "api_key"));
$group->api_key->error_messages("invalid", _("The API key you provided is invalid."));
$group->submit(_("Save"));
return $form;
}
public static function check_comment($comment) {
$request = self::_build_request("comment-check", $comment);
$response = self::_http_post($request);
return "true" == $response->body[0];
}
public static function submit_spam($comment) {
$request = self::_build_request("submit-spam", $comment);
$response = self::_http_post($request);
return "true" == $response->body[0];
}
public static function submit_ham($comment) {
$request = self::_build_request("submit-ham", $comment);
$response = self::_http_post($request);
return "true" == $response->body[0];
}
public static function validate_key($api_key) {
$request = self::_build_verify_request($api_key);
$response = self::_http_post($request, "rest.akismet.com");
return "valid" == $response->body[0];
}
public static function _build_verify_request($api_key) {
$base_url = url::base(false, "http");
$query_string = "key={$api_key}&blog=$base_url";
$version = module::get_version("akismet");
$http_request = "POST /1.1/verify-key HTTP/1.0\r\n";
$http_request .= "Host: rest.akismet.com\r\n";
$http_request .= "Content-Type: application/x-www-form-urlencoded; charset=UTF-8\r\n";
$http_request .= "Content-Length: " . strlen($query_string) . "\r\n";
$http_request .= "User-Agent: Gallery/3 | Akismet/$version\r\n";
$http_request .= "\r\n";
$http_request .= $query_string;
return $http_request;
}
public static function _build_request($function, $comment) {
$comment_data = array();
$comment_data["user_ip"] = $comment->ip_addr;
$comment_data["permalink"] = url::site("comments/{$comment->id}");
$comment_data["blog"] = url::base(false, "http");
$comment_data["user_agent"] = $comment->user_agent;
$comment_data["referrer"] = $_SERVER["HTTP_REFERER"];
$comment_data["comment_type"] = "comment";
$comment_data["comment_author"] = $comment->author;
$comment_data["comment_author_email"] = $comment->email;
$comment_data["comment_author_url"] = $comment->url;
$comment_data["comment_content"] = $comment->text;
foreach (self::$white_list as $key) {
if (array_key_exists($key, $_SERVER)) {
$comment_data[$key] = $_SERVER[$key];
}
}
$query_string = array();
foreach ($comment_data as $key => $data) {
if (!is_array($data)) {
$query_string[] = "$key=" . urlencode($data);
}
}
$query_string = join("&", $query_string);
$version = module::get_version("akismet");
$http_request = "POST /1.1/$function HTTP/1.0\r\n";
$http_request .= "Host: " . module::get_var("akismet", "api_key") . ".rest.akismet.com\r\n";
$http_request .= "Content-Type: application/x-www-form-urlencoded; charset=UTF-8\r\n";
$http_request .= "Content-Length: " . strlen($query_string) . "\r\n";
$http_request .= "User-Agent: Gallery/3 | Akismet/$version\r\n";
$http_request .= "\r\n";
$http_request .= $query_string;
return $http_request;
}
private static function _http_post($http_request, $host=null) {
if (!$host) {
$host = module::get_var("akismet", "api_key") . ".rest.akismet.com";
}
$response = "";
Kohana::log("debug", "Send request\n" . print_r($http_request, 1));
if (false !== ($fs = @fsockopen($host, 80, $errno, $errstr, 5))) {
fwrite($fs, $http_request);
while ( !feof($fs) ) {
$response .= fgets($fs, 1160); // One TCP-IP packet
}
fclose($fs);
list($headers, $body) = explode("\r\n\r\n", $response);
$headers = explode("\r\n", $headers);
$body = explode("\r\n", $body);
$response = new ArrayObject(
array("headers" => $headers, "body" => $body), ArrayObject::ARRAY_AS_PROPS);
} else {
throw new Exception("@todo CONNECTION TO SPAM SERVICE FAILED");
}
Kohana::log("debug", "Received response\n" . print_r($response, 1));
return $response;
}
}
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