368 lines
11 KiB
PHP
Executable File
368 lines
11 KiB
PHP
Executable File
<?php
|
|
/**
|
|
* Akismet anti-comment spam service
|
|
*
|
|
* The class in this package allows use of the {@link http://akismet.com Akismet} anti-comment spam service in any PHP5 application.
|
|
*
|
|
* This service performs a number of checks on submitted data and returns whether or not the data is likely to be spam.
|
|
*
|
|
* Please note that in order to use this class, you must have a vaild {@link http://wordpress.com/api-keys/ WordPress API key}. They are free for non/small-profit types and getting one will only take a couple of minutes.
|
|
*
|
|
* For commercial use, please {@link http://akismet.com/commercial/ visit the Akismet commercial licensing page}.
|
|
*
|
|
* Please be aware that this class is PHP5 only. Attempts to run it under PHP4 will most likely fail.
|
|
*
|
|
* See the Akismet class documentation page linked to below for usage information.
|
|
*
|
|
* @package Akismet
|
|
* @author Alex Potsides, {@link http://www.achingbrain.net http://www.achingbrain.net}, Bret Kuhns {@link http://www.miphp.net}
|
|
* @version 0.1
|
|
* @copyright Alex Potsides, {@link http://www.achingbrain.net http://www.achingbrain.net}
|
|
* @license http://www.gnu.org/licenses/gpl.html GNU General Public License
|
|
*/
|
|
|
|
/**
|
|
* The Akismet PHP4 Class
|
|
*
|
|
* This class takes the functionality from the Akismet WordPress plugin written by {@link http://photomatt.net/ Matt Mullenweg} and allows it to be integrated into any PHP5 application or website.
|
|
*
|
|
* The original plugin is {@link http://akismet.com/download/ available on the Akismet website}.
|
|
*
|
|
* <b>Usage:</b>
|
|
* <code>
|
|
* $akismet = new Akismet('http://www.example.com/blog/', 'aoeu1aoue');
|
|
* $akismet->setCommentAuthor($name);
|
|
* $akismet->setCommentAuthorEmail($email);
|
|
* $akismet->setCommentAuthorURL($url);
|
|
* $akismet->setCommentContent($comment);
|
|
* $akismet->setPermalink('http://www.example.com/blog/alex/someurl/');
|
|
* if($akismet->isCommentSpam())
|
|
* // store the comment but mark it as spam (in case of a mis-diagnosis)
|
|
* else
|
|
* // store the comment normally
|
|
* </code>
|
|
*
|
|
* @package akismet
|
|
* @name Akismet
|
|
* @version 0.2
|
|
* @author Alex Potsides (converted to PHP4 by Bret Kuhns)
|
|
* @link http://www.achingbrain.net/
|
|
*/
|
|
class Akismet {
|
|
var $version = '0.2';
|
|
var $wordPressAPIKey;
|
|
var $blogURL;
|
|
var $comment;
|
|
var $apiPort;
|
|
var $akismetServer;
|
|
var $akismetVersion;
|
|
|
|
// This prevents some potentially sensitive information from being sent accross the wire.
|
|
var $ignore = array(
|
|
'HTTP_COOKIE',
|
|
'HTTP_X_FORWARDED_FOR',
|
|
'HTTP_X_FORWARDED_HOST',
|
|
'HTTP_MAX_FORWARDS',
|
|
'HTTP_X_FORWARDED_SERVER',
|
|
'REDIRECT_STATUS',
|
|
'SERVER_PORT',
|
|
'PATH',
|
|
'DOCUMENT_ROOT',
|
|
'SERVER_ADMIN',
|
|
'QUERY_STRING',
|
|
'PHP_SELF'
|
|
);
|
|
|
|
|
|
/**
|
|
* @throws Exception An exception is thrown if your API key is invalid.
|
|
* @param string Your WordPress API key.
|
|
* @param string $blogURL The URL of your blog.
|
|
*/
|
|
function Akismet($blogURL, $wordPressAPIKey) {
|
|
$this->blogURL = $blogURL;
|
|
$this->wordPressAPIKey = $wordPressAPIKey;
|
|
|
|
// Set some default values
|
|
$this->apiPort = 80;
|
|
$this->akismetServer = 'rest.akismet.com';
|
|
$this->akismetVersion = '1.1';
|
|
|
|
// Start to populate the comment data
|
|
$this->comment['blog'] = $blogURL;
|
|
$this->comment['user_agent'] = $_SERVER['HTTP_USER_AGENT'];
|
|
$this->comment['referrer'] = $_SERVER['HTTP_REFERER'];
|
|
|
|
// This is necessary if the server PHP5 is running on has been set up to run PHP4 and
|
|
// PHP5 concurently and is actually running through a separate proxy al a these instructions:
|
|
// http://www.schlitt.info/applications/blog/archives/83_How_to_run_PHP4_and_PHP_5_parallel.html
|
|
// and http://wiki.coggeshall.org/37.html
|
|
// Otherwise the user_ip appears as the IP address of the PHP4 server passing the requests to the
|
|
// PHP5 one...
|
|
$this->comment['user_ip'] = $_SERVER['REMOTE_ADDR'] != getenv('SERVER_ADDR') ? $_SERVER['REMOTE_ADDR'] : getenv('HTTP_X_FORWARDED_FOR');
|
|
|
|
// Check to see if the key is valid
|
|
$response = $this->http_post('key=' . $this->wordPressAPIKey . '&blog=' . $this->blogURL, $this->akismetServer, '/' . $this->akismetVersion . '/verify-key');
|
|
|
|
if($response[1] != 'valid') {
|
|
// Whoops, no it's not. Throw an exception as we can't proceed without a valid API key.
|
|
trigger_error('Invalid API key. Please obtain one from http://wordpress.com/api-keys/', E_USER_ERROR);
|
|
}
|
|
}
|
|
|
|
function http_post($request, $host, $path) {
|
|
$http_request =
|
|
"POST " . $path . " HTTP/1.0\r\n" .
|
|
"Host: " . $host . "\r\n" .
|
|
"Content-Type: application/x-www-form-urlencoded; charset=utf-8\r\n" .
|
|
"Content-Length: " . strlen($request) . "\r\n" .
|
|
"User-Agent: Akismet PHP5 Class " . $this->version . " | Akismet/1.11\r\n" .
|
|
"\r\n" .
|
|
$request
|
|
;
|
|
|
|
$socketWriteRead = new SocketWriteRead($host, $this->apiPort, $http_request);
|
|
$socketWriteRead->send();
|
|
|
|
return explode("\r\n\r\n", $socketWriteRead->getResponse(), 2);
|
|
}
|
|
|
|
// Formats the data for transmission echo $sql;
|
|
function getQueryString() {
|
|
foreach($_SERVER as $key => $value) {
|
|
if(!in_array($key, $this->ignore)) {
|
|
if($key == 'REMOTE_ADDR') {
|
|
$this->comment[$key] = $this->comment['user_ip'];
|
|
} else {
|
|
$this->comment[$key] = $value;
|
|
}
|
|
}
|
|
}
|
|
|
|
$query_string = '';
|
|
|
|
foreach($this->comment as $key => $data) {
|
|
|
|
@$query_string .= $key . '=' . urlencode(stripslashes($data)) . '&';
|
|
}
|
|
|
|
return $query_string;
|
|
}
|
|
|
|
/**
|
|
* Tests for spam.
|
|
*
|
|
* Uses the web service provided by {@link http://www.akismet.com Akismet} to see whether or not the submitted comment is spam. Returns a boolean value.
|
|
*
|
|
* @return bool True if the comment is spam, false if not
|
|
*/
|
|
function isSpam() {
|
|
$response = $this->http_post($this->getQueryString(), $this->wordPressAPIKey . '.rest.akismet.com', '/' . $this->akismetVersion . '/comment-check');
|
|
|
|
return ($response[1] == 'true');
|
|
}
|
|
|
|
/**
|
|
* Submit spam that is incorrectly tagged as ham.
|
|
*
|
|
* Using this function will make you a good citizen as it helps Akismet to learn from its mistakes. This will improve the service for everybody.
|
|
*/
|
|
function submitSpam() {
|
|
$this->http_post($this->getQueryString(), $this->wordPressAPIKey . '.' . $this->akismetServer, '/' . $this->akismetVersion . '/submit-spam');
|
|
}
|
|
|
|
/**
|
|
* Submit ham that is incorrectly tagged as spam.
|
|
*
|
|
* Using this function will make you a good citizen as it helps Akismet to learn from its mistakes. This will improve the service for everybody.
|
|
*/
|
|
function submitHam() {
|
|
$this->http_post($this->getQueryString(), $this->wordPressAPIKey . '.' . $this->akismetServer, '/' . $this->akismetVersion . '/submit-ham');
|
|
}
|
|
|
|
/**
|
|
* To override the user IP address when submitting spam/ham later on
|
|
*
|
|
* @param string $userip An IP address. Optional.
|
|
*/
|
|
function setUserIP($userip) {
|
|
$this->comment['user_ip'] = $userip;
|
|
}
|
|
|
|
/**
|
|
* To override the referring page when submitting spam/ham later on
|
|
*
|
|
* @param string $referrer The referring page. Optional.
|
|
*/
|
|
function setReferrer($referrer) {
|
|
$this->comment['referrer'] = $referrer;
|
|
}
|
|
|
|
/**
|
|
* A permanent URL referencing the blog post the comment was submitted to.
|
|
*
|
|
* @param string $permalink The URL. Optional.
|
|
*/
|
|
function setPermalink($permalink) {
|
|
$this->comment['permalink'] = $permalink;
|
|
}
|
|
|
|
/**
|
|
* The type of comment being submitted.
|
|
*
|
|
* May be blank, comment, trackback, pingback, or a made up value like "registration" or "wiki".
|
|
*/
|
|
function setType($commentType) {
|
|
$this->comment['comment_type'] = $commentType;
|
|
}
|
|
|
|
/**
|
|
* The name that the author submitted with the comment.
|
|
*/
|
|
function setAuthor($commentAuthor) {
|
|
$this->comment['comment_author'] = $commentAuthor;
|
|
}
|
|
|
|
/**
|
|
* The email address that the author submitted with the comment.
|
|
*
|
|
* The address is assumed to be valid.
|
|
*/
|
|
function setAuthorEmail($authorEmail) {
|
|
$this->comment['comment_author_email'] = $authorEmail;
|
|
}
|
|
|
|
/**
|
|
* The URL that the author submitted with the comment.
|
|
*/
|
|
function setAuthorURL($authorURL) {
|
|
$this->comment['comment_author_url'] = $authorURL;
|
|
}
|
|
|
|
/**
|
|
* The comment's body text.
|
|
*/
|
|
function setContent($commentBody) {
|
|
$this->comment['comment_content'] = $commentBody;
|
|
}
|
|
|
|
/**
|
|
* Defaults to 80
|
|
*/
|
|
function setAPIPort($apiPort) {
|
|
$this->apiPort = $apiPort;
|
|
}
|
|
|
|
/**
|
|
* Defaults to rest.akismet.com
|
|
*/
|
|
function setAkismetServer($akismetServer) {
|
|
$this->akismetServer = $akismetServer;
|
|
}
|
|
|
|
/**
|
|
* Defaults to '1.1'
|
|
*/
|
|
function setAkismetVersion($akismetVersion) {
|
|
$this->akismetVersion = $akismetVersion;
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Utility class used by Akismet
|
|
*
|
|
* This class is used by Akismet to do the actual sending and receiving of data. It opens a connection to a remote host, sends some data and the reads the response and makes it available to the calling program.
|
|
*
|
|
* The code that makes up this class originates in the Akismet WordPress plugin, which is {@link http://akismet.com/download/ available on the Akismet website}.
|
|
*
|
|
* N.B. It is not necessary to call this class directly to use the Akismet class. This is included here mainly out of a sense of completeness.
|
|
*
|
|
* @package akismet
|
|
* @name SocketWriteRead
|
|
* @version 0.1
|
|
* @author Alex Potsides
|
|
* @link http://www.achingbrain.net/
|
|
*/
|
|
class SocketWriteRead {
|
|
var $host;
|
|
var $port;
|
|
var $request;
|
|
var $response;
|
|
var $responseLength;
|
|
var $errorNumber;
|
|
var $errorString;
|
|
|
|
/**
|
|
* @param string $host The host to send/receive data.
|
|
* @param int $port The port on the remote host.
|
|
* @param string $request The data to send.
|
|
* @param int $responseLength The amount of data to read. Defaults to 1160 bytes.
|
|
*/
|
|
function SocketWriteRead($host, $port, $request, $responseLength = 1160) {
|
|
$this->host = $host;
|
|
$this->port = $port;
|
|
$this->request = $request;
|
|
$this->responseLength = $responseLength;
|
|
$this->errorNumber = 0;
|
|
$this->errorString = '';
|
|
}
|
|
|
|
/**
|
|
* Sends the data to the remote host.
|
|
*
|
|
* @throws An exception is thrown if a connection cannot be made to the remote host.
|
|
*/
|
|
function send() {
|
|
$this->response = '';
|
|
|
|
$fs = fsockopen($this->host, $this->port, $this->errorNumber, $this->errorString,
|
|
AKISMET_TIMEOUT);
|
|
|
|
if($this->errorNumber != 0) {
|
|
trigger_error('Error connecting to host: ' . $this->host . ' Error number: ' . $this->errorNumber . ' Error message: ' . $this->errorString, E_USER_ERROR);
|
|
}
|
|
|
|
if($fs !== false) {
|
|
@fwrite($fs, $this->request);
|
|
|
|
while(!feof($fs)) {
|
|
$this->response .= fgets($fs, $this->responseLength);
|
|
}
|
|
|
|
fclose($fs);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns the server response text
|
|
*
|
|
* @return string
|
|
*/
|
|
function getResponse() {
|
|
return $this->response;
|
|
}
|
|
|
|
/**
|
|
* Returns the error number
|
|
*
|
|
* If there was no error, 0 will be returned.
|
|
*
|
|
* @return int
|
|
*/
|
|
function getErrorNumber() {
|
|
return $this->errorNumber;
|
|
}
|
|
|
|
/**
|
|
* Returns the error string
|
|
*
|
|
* If there was no error, an empty string will be returned.
|
|
*
|
|
* @return string
|
|
*/
|
|
function getErrorString() {
|
|
return $this->errorString;
|
|
}
|
|
}
|
|
?>
|