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<?php /** * Copyright 2016 Freemius, Inc. * * Licensed under the GPL v2 (the "License"); you may * not use this file except in compliance with the License. You may obtain * a copy of the License at * * http://choosealicense.com/licenses/gpl-v2/ * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the * License for the specific language governing permissions and limitations * under the License. / namespace WBCR\Factory_Freemius_154\Sdk; if ( ! defined( 'ABSPATH' ) ) { exit; } require_once dirname(__FILE__) . '/FreemiusBase.php'; if( !defined('FREEMIUS_SDK__USER_AGENT') ) { define('FREEMIUS_SDK__USER_AGENT', 'fs-php-' . Freemius_Api_Base::VERSION); } if( !defined('FREEMIUS_SDK__SIMULATE_NO_CURL') ) { define('FREEMIUS_SDK__SIMULATE_NO_CURL', false); } if( !defined('FREEMIUS_SDK__SIMULATE_NO_API_CONNECTIVITY_CLOUDFLARE') ) { define('FREEMIUS_SDK__SIMULATE_NO_API_CONNECTIVITY_CLOUDFLARE', false); } if( !defined('FREEMIUS_SDK__SIMULATE_NO_API_CONNECTIVITY_SQUID_ACL') ) { define('FREEMIUS_SDK__SIMULATE_NO_API_CONNECTIVITY_SQUID_ACL', false); } if( !defined('FREEMIUS_SDK__HAS_CURL') ) { if( FREEMIUS_SDK__SIMULATE_NO_CURL ) { define('FREEMIUS_SDK__HAS_CURL', false); } else { $curl_required_methods = [ 'curl_version', 'curl_exec', 'curl_init', 'curl_close', 'curl_setopt', 'curl_setopt_array', 'curl_error', ]; $has_curl = true; foreach($curl_required_methods as $m) { if( !function_exists($m) ) { $has_curl = false; break; } } define('FREEMIUS_SDK__HAS_CURL', $has_curl); } } $curl_version = FREEMIUS_SDK__HAS_CURL ? curl_version() : ['version' => '7.37']; if( !defined('FREEMIUS_API__PROTOCOL') ) { define('FREEMIUS_API__PROTOCOL', version_compare($curl_version['version'], '7.37', '>=') ? 'https' : 'http'); } if( !defined('FREEMIUS_API__LOGGER_ON') ) { define('FREEMIUS_API__LOGGER_ON', false); } if( !defined('FREEMIUS_API__ADDRESS') ) { define('FREEMIUS_API__ADDRESS', '://api.freemius.com'); } if( !defined('FREEMIUS_API__SANDBOX_ADDRESS') ) { define('FREEMIUS_API__SANDBOX_ADDRESS', '://sandbox-api.freemius.com'); } if( class_exists('WBCR\Factory_Freemius_154\Sdk\Freemius_Api_WordPress') ) { return; } class Freemius_Api_WordPress extends Freemius_Api_Base { private static $_logger = []; /* * @param string $pScope 'app', 'developer', 'user' or 'install'. * @param number $pID Element's id. * @param string $pPublic Public key. * @param string\|bool $pSecret Element's secret key. * @param bool $pSandbox Whether or not to run API in sandbox mode. / public function __construct($pScope, $pID, $pPublic, $pSecret = false, $pSandbox = false) { // If secret key not provided, use public key encryption. if( is_bool($pSecret) ) { $pSecret = $pPublic; } parent::Init($pScope, $pID, $pPublic, $pSecret, $pSandbox); } public static function GetUrl($pCanonizedPath = '', $pIsSandbox = false) { $address = ($pIsSandbox ? FREEMIUS_API__SANDBOX_ADDRESS : FREEMIUS_API__ADDRESS); if( ':' === $address[0] ) { $address = self::$_protocol . $address; } return $address . $pCanonizedPath; } #---------------------------------------------------------------------------------- #region Servers Clock Diff #---------------------------------------------------------------------------------- /* * @var int Clock diff in seconds between current server to API server. / private static $_clock_diff = 0; /* * Set clock diff for all API calls. * * @param $pSeconds * * @since 1.0.3 * / public static function SetClockDiff($pSeconds) { self::$_clock_diff = $pSeconds; } /* * Find clock diff between current server to API server. * * @return int Clock diff in seconds. * @since 1.0.2 / public static function FindClockDiff() { $time = time(); $pong = self::Ping(); return ($time - strtotime($pong->timestamp)); } #endregion /* * @var string http or https / private static $_protocol = FREEMIUS_API__PROTOCOL; /* * Set API connection protocol. * * @since 1.0.4 / public static function SetHttp() { self::$_protocol = 'http'; } /* * @return bool * @since 1.0.4 * / public static function IsHttps() { return ('https' === self::$_protocol); } /* * Sign request with the following HTTP headers: * Content-MD5: MD5(HTTP Request body) * Date: Current date (i.e Sat, 14 Feb 2016 20:24:46 +0000) * Authorization: FS {scope_entity_id}:{scope_entity_public_key}:base64encode(sha256(string_to_sign, * {scope_entity_secret_key})) * * @param string $pResourceUrl * @param array $pWPRemoteArgs * * @return array / function SignRequest($pResourceUrl, $pWPRemoteArgs) { $auth = $this->GenerateAuthorizationParams($pResourceUrl, $pWPRemoteArgs['method'], !empty($pWPRemoteArgs['body']) ? $pWPRemoteArgs['body'] : ''); $pWPRemoteArgs['headers']['Date'] = $auth['date']; $pWPRemoteArgs['headers']['Authorization'] = $auth['authorization']; if( !empty($auth['content_md5']) ) { $pWPRemoteArgs['headers']['Content-MD5'] = $auth['content_md5']; } return $pWPRemoteArgs; } /* * Generate Authorization request headers: * * Content-MD5: MD5(HTTP Request body) * Date: Current date (i.e Sat, 14 Feb 2016 20:24:46 +0000) * Authorization: FS {scope_entity_id}:{scope_entity_public_key}:base64encode(sha256(string_to_sign, * {scope_entity_secret_key})) * * @param string $pResourceUrl * @param string $pMethod * @param string $pPostParams * * @return array * @throws Freemius_Exception * @author Vova Feldman * / function GenerateAuthorizationParams($pResourceUrl, $pMethod = 'GET', $pPostParams = '') { $pMethod = strtoupper($pMethod); $eol = "\n"; $content_md5 = ''; $content_type = ''; $now = (time() - self::$_clock_diff); $date = date('r', $now); if( in_array($pMethod, ['POST', 'PUT']) && !empty($pPostParams) ) { $content_md5 = md5($pPostParams); $content_type = 'application/json'; } $string_to_sign = implode($eol, [ $pMethod, $content_md5, $content_type, $date, $pResourceUrl ]); // If secret and public keys are identical, it means that // the signature uses public key hash encoding. $auth_type = ($this->_secret !== $this->_public) ? 'FS' : 'FSP'; $auth = [ 'date' => $date, 'authorization' => $auth_type . ' ' . $this->_id . ':' . $this->_public . ':' . self::Base64UrlEncode(hash_hmac('sha256', $string_to_sign, $this->_secret)) ]; if( !empty($content_md5) ) { $auth['content_md5'] = $content_md5; } return $auth; } /* * Get API request URL signed via query string. * * @param string $pPath * * @return string * @throws Freemius_Exception * * @since 1.2.3 Stopped using http_build_query(). Instead, use urlencode(). In some environments the encoding of http_build_query() can generate a URL that once used with a redirect, the `&` querystring separator is escaped to `&` which breaks the URL (Added by @svovaf). * / function GetSignedUrl($pPath) { $resource = explode('?', $this->CanonizePath($pPath)); $pResourceUrl = $resource[0]; $auth = $this->GenerateAuthorizationParams($pResourceUrl); return Freemius_Api_WordPress::GetUrl($pResourceUrl . '?' . (1 < count($resource) && !empty($resource[1]) ? $resource[1] . '&' : '') . 'authorization=' . urlencode($auth['authorization']) . '&auth_date=' . urlencode($auth['date']), $this->_isSandbox); } /* * @param string $pUrl * @param array $pWPRemoteArgs * * @return mixed * @author Vova Feldman * / private static function ExecuteRequest($pUrl, &$pWPRemoteArgs) { $start = microtime(true); $response = wp_remote_request($pUrl, $pWPRemoteArgs); if( FREEMIUS_API__LOGGER_ON ) { $end = microtime(true); $has_body = (isset($pWPRemoteArgs['body']) && !empty($pWPRemoteArgs['body'])); $is_http_error = is_wp_error($response); self::$_logger[] = [ 'id' => count(self::$_logger), 'start' => $start, 'end' => $end, 'total' => ($end - $start), 'method' => $pWPRemoteArgs['method'], 'path' => $pUrl, 'body' => $has_body ? $pWPRemoteArgs['body'] : null, 'result' => !$is_http_error ? $response['body'] : json_encode($response->get_error_messages()), 'code' => !$is_http_error ? $response['response']['code'] : null, 'backtrace' => debug_backtrace(), ]; } return $response; } /* * @return array / static function GetLogger() { return self::$_logger; } /* * @param string $pCanonizedPath * @param string $pMethod * @param array $pParams * @param null\|array $pWPRemoteArgs * @param bool $pIsSandbox * @param null\|callable $pBeforeExecutionFunction * * @return object[]\|object\|null * * @throws \Freemius_Exception / private static function MakeStaticRequest($pCanonizedPath, $pMethod = 'GET', $pParams = [], $pWPRemoteArgs = null, $pIsSandbox = false, $pBeforeExecutionFunction = null) { // Connectivity errors simulation. if( FREEMIUS_SDK__SIMULATE_NO_API_CONNECTIVITY_CLOUDFLARE ) { self::ThrowCloudFlareDDoSException(); } else if( FREEMIUS_SDK__SIMULATE_NO_API_CONNECTIVITY_SQUID_ACL ) { self::ThrowSquidAclException(); } if( empty($pWPRemoteArgs) ) { $user_agent = 'Freemius/WordPress-SDK/' . Freemius_Api_Base::VERSION . '; ' . home_url(); $pWPRemoteArgs = [ 'method' => strtoupper($pMethod), 'connect_timeout' => 10, 'timeout' => 60, 'follow_redirects' => true, 'redirection' => 5, 'user-agent' => $user_agent, 'blocking' => true, ]; } if( !isset($pWPRemoteArgs['headers']) \|\| !is_array($pWPRemoteArgs['headers']) ) { $pWPRemoteArgs['headers'] = []; } if( in_array($pMethod, ['POST', 'PUT']) ) { if( is_array($pParams) && 0 < count($pParams) ) { $pWPRemoteArgs['headers']['Content-type'] = 'application/json'; $pWPRemoteArgs['body'] = json_encode($pParams); } } $request_url = self::GetUrl($pCanonizedPath, $pIsSandbox); $resource = explode('?', $pCanonizedPath); if( FREEMIUS_SDK__HAS_CURL ) { // Disable the 'Expect: 100-continue' behaviour. This causes cURL to wait // for 2 seconds if the server does not support this header. $pWPRemoteArgs['headers']['Expect'] = ''; } if( 'https' === substr(strtolower($request_url), 0, 5) ) { $pWPRemoteArgs['sslverify'] = false; } if( false !== $pBeforeExecutionFunction && is_callable($pBeforeExecutionFunction) ) { $pWPRemoteArgs = call_user_func($pBeforeExecutionFunction, $resource[0], $pWPRemoteArgs); } $result = self::ExecuteRequest($request_url, $pWPRemoteArgs); if( is_wp_error($result) ) { /* * @var \WP_Error $result / if( self::IsCurlError($result) ) { /* * With dual stacked DNS responses, it's possible for a server to * have IPv6 enabled but not have IPv6 connectivity. If this is * the case, cURL will try IPv4 first and if that fails, then it will * fall back to IPv6 and the error EHOSTUNREACH is returned by the * operating system. / $matches = []; $regex = '/Failed to connect to ([^:].): Network is unreachable/'; if( preg_match($regex, $result->get_error_message('http_request_failed'), $matches) ) { /** * Validate IP before calling `inet_pton()` to avoid PHP un-catchable warning. * * @author Vova Feldman (@svovaf) / if( filter_var($matches[1], FILTER_VALIDATE_IP) ) { if( strlen(inet_pton($matches[1])) === 16 ) { // error_log('Invalid IPv6 configuration on server, Please disable or get native IPv6 on your server.'); // Hook to an action triggered just before cURL is executed to resolve the IP version to v4. add_action('http_api_curl', 'WBCR\Factory_Freemius_154\Sdk\Freemius_Api_WordPress::CurlResolveToIPv4', 10, 1); // Re-run request. $result = self::ExecuteRequest($request_url, $pWPRemoteArgs); } } } } if( is_wp_error($result) ) { self::ThrowWPRemoteException($result); } } $response_body = $result['body']; if( empty($response_body) ) { return null; } $decoded = json_decode($response_body); if( is_null($decoded) ) { if( preg_match('/Please turn JavaScript on/i', $response_body) && preg_match('/text\/javascript/', $response_body) ) { self::ThrowCloudFlareDDoSException($response_body); } else if( preg_match('/Access control configuration prevents your request from being allowed at this time. Please contact your service provider if you feel this is incorrect./', $response_body) && preg_match('/squid/', $response_body) ) { self::ThrowSquidAclException($response_body); } else { $decoded = (object)[ 'error' => (object)[ 'type' => 'Unknown', 'message' => $response_body, 'code' => 'unknown', 'http' => 402 ] ]; } } return $decoded; } /* * Makes an HTTP request. This method can be overridden by subclasses if * developers want to do fancier things or use something other than wp_remote_request() * to make the request. * * @param string $pCanonizedPath The URL to make the request to * @param string $pMethod HTTP method * @param array $pParams The parameters to use for the POST body * @param null\|array $pWPRemoteArgs wp_remote_request options. * * @return object[]\|object\|null * * @throws Freemius_Exception / public function MakeRequest($pCanonizedPath, $pMethod = 'GET', $pParams = [], $pWPRemoteArgs = null) { $resource = explode('?', $pCanonizedPath); // Only sign request if not ping.json connectivity test. $sign_request = ('/v1/ping.json' !== strtolower(substr($resource[0], -strlen('/v1/ping.json')))); return self::MakeStaticRequest($pCanonizedPath, $pMethod, $pParams, $pWPRemoteArgs, $this->_isSandbox, $sign_request ? [ &$this, 'SignRequest' ] : null); } /* * Sets CURLOPT_IPRESOLVE to CURL_IPRESOLVE_V4 for cURL-Handle provided as parameter * * @param resource $handle A cURL handle returned by curl_init() * * @return resource $handle A cURL handle returned by curl_init() with CURLOPT_IPRESOLVE set to * CURL_IPRESOLVE_V4 * * @link https://gist.github.com/golderweb/3a2aaec2d56125cc004e / static function CurlResolveToIPv4($handle) { curl_setopt($handle, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4); return $handle; } #---------------------------------------------------------------------------------- #region Connectivity Test #---------------------------------------------------------------------------------- /* * If successful connectivity to the API endpoint using ping.json endpoint. * * - OR - * * Validate if ping result object is valid. * * @param mixed $pPong * * @return bool / public static function Test($pPong = null) { $pong = is_null($pPong) ? self::Ping() : $pPong; return (is_object($pong) && isset($pong->api) && 'pong' === $pong->api); } /* * Ping API to test connectivity. * * @return object / public static function Ping() { try { $result = self::MakeStaticRequest('/v' . FREEMIUS_API__VERSION . '/ping.json'); } catch( Freemius_Exception $e ) { // Map to error object. $result = (object)$e->getResult(); } catch( \Exception $e ) { // Map to error object. $result = (object)[ 'error' => [ 'type' => 'Unknown', 'message' => $e->getMessage() . ' (' . $e->getFile() . ': ' . $e->getLine() . ')', 'code' => 'unknown', 'http' => 402 ] ]; } return $result; } #endregion #---------------------------------------------------------------------------------- #region Connectivity Exceptions #---------------------------------------------------------------------------------- /* * @param \WP_Error $pError * * @return bool / private static function IsCurlError(\WP_Error $pError) { $message = $pError->get_error_message('http_request_failed'); return (0 === strpos($message, 'cURL')); } /* * @param \WP_Error $pError * * @throws Freemius_Exception / private static function ThrowWPRemoteException(\WP_Error $pError) { if( self::IsCurlError($pError) ) { $message = $pError->get_error_message('http_request_failed'); #region Check if there are any missing cURL methods. $curl_required_methods = [ 'curl_version', 'curl_exec', 'curl_init', 'curl_close', 'curl_setopt', 'curl_setopt_array', 'curl_error', ]; // Find all missing methods. $missing_methods = []; foreach($curl_required_methods as $m) { if( !function_exists($m) ) { $missing_methods[] = $m; } } if( !empty($missing_methods) ) { throw new Freemius_Exception([ 'error' => (object)[ 'type' => 'cUrlMissing', 'message' => $message, 'code' => 'curl_missing', 'http' => 402 ], 'missing_methods' => $missing_methods, ]); } #endregion // cURL error - "cURL error {{errno}}: {{error}}". $parts = explode(':', substr($message, strlen('cURL error ')), 2); $code = (0 < count($parts)) ? $parts[0] : 'http_request_failed'; $message = (1 < count($parts)) ? $parts[1] : $message; $e = new Freemius_Exception([ 'error' => [ 'code' => $code, 'message' => $message, 'type' => 'CurlException', ], ]); } else { $e = new Freemius_Exception([ 'error' => [ 'code' => $pError->get_error_code(), 'message' => $pError->get_error_message(), 'type' => 'WPRemoteException', ], ]); } throw $e; } /* * @param string $pResult * * @throws Freemius_Exception / private static function ThrowCloudFlareDDoSException($pResult = '') { throw new Freemius_Exception([ 'error' => (object)[ 'type' => 'CloudFlareDDoSProtection', 'message' => $pResult, 'code' => 'cloudflare_ddos_protection', 'http' => 402 ] ]); } /* * @param string $pResult * * @throws Freemius_Exception */ private static function ThrowSquidAclException($pResult = '') { throw new Freemius_Exception([ 'error' => (object)[ 'type' => 'SquidCacheBlock', 'message' => $pResult, 'code' => 'squid_cache_block', 'http' => 402 ] ]); } #endregion }

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