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<?php
/*
Plugin Name: MediaFire API
Description: Check links to files hosted on MediaFire.
Version: 1.0
Author: Janis Elsts
ModuleID: mediafire-checker
ModuleCategory: checker
ModuleContext: on-demand
ModuleLazyInit: true
ModuleClassName: blcMediaFireChecker
ModulePriority: 100
ModuleCheckerUrlPattern: @^http://(?:www\.)?mediafire\.com/(?:(?:download\.php)?\?|download/)([0-9a-zA-Z]{11,20})(?:$|[^0-9a-zA-Z])@
*/
/**
* MediaFire link checker.
*
* @package Broken Link Checker
* @author Janis Elsts
* @access public
*/
class blcMediaFireChecker extends blcChecker {
/**
* Determine if the checker can parse a specific URL.
* Always returns true because the ModuleCheckerUrlPattern header constitutes sufficient verification.
*
* @param string $url
* @param array $parsed
* @return bool True.
*/
function can_check($url, $parsed){
return true;
}
/**
* Check a MediaFire link.
*
* @param string $url
* @return array
*/
function check($url){
$result = array(
'final_url' => $url,
'redirect_count' => 0,
'timeout' => false,
'broken' => false,
'log' => "<em>(Using MediaFire checker module)</em>\n\n",
'http_code' => 0,
'result_hash' => '',
);
//URLs like http://www.mediafire.com/download.php?03mj0mwmnnm are technically valid,
//but they introduce unnecessary redirects.
$url = str_replace('download.php','', $url);
//Since MediaFire doesn't have an API, we just send a HEAD request
//and try do divine the file state from the response headers.
$start = microtime_float();
$rez = $this->head($url);
$result['request_duration'] = microtime_float() - $start;
if ( is_wp_error($rez) ){
//An unexpected error.
$result['broken'] = true;
$result['log'] .= "Error : " . $rez->get_error_message();
if ( $data = $rez->get_error_data() ){
$result['log'] .= "\n\nError data : " . print_r($data, true);
}
} else {
$result['http_code'] = intval($rez['response']['code']);
if ( $result['http_code'] == 200 ){
//200 - OK
$result['broken'] = false;
$result['log'] .= "File OK";
} elseif ( isset($rez['headers']['location']) ) {
//Redirect = either an error or a redirect to the full file URL.
//For errors, the redirect URL is structured like this : '/error.php?errno=320'.
//The 'errno' argument contains an (undocumented) error code.
$result['broken'] = true;
if ( strpos($rez['headers']['location'], '/download/') !== false ) {
$result['broken'] = false;
$result['http_code'] = 200;
$result['log'] .= "File OK";
$result['log'] .= "\nFull URL: " . $rez['headers']['location'];
} elseif ( strpos($rez['headers']['location'], 'errno=320') !== false ){
$result['status_code'] = BLC_LINK_STATUS_ERROR;
$result['status_text'] = __('Not Found', 'broken-link-checker');
$result['http_code'] = 0;
$result['log'] .= "The file is invalid or has been removed.";
} elseif ( strpos($rez['headers']['location'], 'errno=378') !== false ) {
$result['status_code'] = BLC_LINK_STATUS_ERROR;
$result['status_text'] = __('Not Found', 'broken-link-checker');
$result['http_code'] = 0;
$result['log'] .= "The file has been removed due to a violation of MediaFire ToS.";
} elseif ( strpos($rez['headers']['location'], 'errno=388') !== false ) {
$result['status_code'] = BLC_LINK_STATUS_WARNING;
$result['status_text'] = __('Permission Denied', 'broken-link-checker');
$result['http_code'] = 0;
$result['log'] .= "Permission denied. Most likely the plugin sent too many requests too quickly. Try again later.";
} else {
$result['status_code'] = BLC_LINK_STATUS_INFO;
$result['status_text'] = __('Unknown Error', 'broken-link-checker');
$result['log'] .= "Unknown error.\n\n";
foreach($rez['headers'] as $name => $value){
$result['log'] .= sprintf("%s: %s\n", $name, $value);
}
}
} else {
$result['log'] .= "Unknown error.\n\n" . implode("\n",$rez['headers']);
}
}
//Generate the result hash (used for detecting false positives)
$result['result_hash'] = implode('|', array(
'mediafire',
$result['http_code'],
$result['broken']?'broken':'0',
$result['timeout']?'timeout':'0'
));
return $result;
}
/**
* Perform a HEAD request to the specified URL.
*
* Note :
*
* Since the MediaFire checker works by parsing the "Location" header, redirect following
* _must_ be disabled. This can become a problem on servers where WP is forced to fall back
* on using WP_Http_Fopen which ignores the 'redirection' flag. WP_Http_Fsockopen would work,
* but it has the lowest priority of all transports.
*
* Alas, there is no way to reliably influence which transport is chosen - the WP_Http::_getTransport
* function caches the available choices, so plugins can disable individual transports only during
* its first run. Therefore, we must pick the best transport manually.
*
* @param string $url
* @return array|WP_Error
*/
function head($url){
$conf = blc_get_configuration();
$args = array(
'timeout' => $conf->options['timeout'],
'redirection' => 0,
'_redirection' => 0, //Internal flag that turns off redirect handling. See WP_Http::handle_redirects()
);
return wp_remote_head($url, $args);
}
}
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