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