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<?php /** * HTTP Proxy connection interface * * @package Requests\Proxy * @since 1.6 */ namespace WpOrg\Requests\Proxy; use WpOrg\Requests\Exception\ArgumentCount; use WpOrg\Requests\Exception\InvalidArgument; use WpOrg\Requests\Hooks; use WpOrg\Requests\Proxy; /** * HTTP Proxy connection interface * * Provides a handler for connection via an HTTP proxy * * @package Requests\Proxy * @since 1.6 */ final class Http implements Proxy { /** * Proxy host and port * * Notation: "host:port" (eg 127.0.0.1:8080 or someproxy.com:3128) * * @var string */ public $proxy; /** * Username * * @var string */ public $user; /** * Password * * @var string */ public $pass; /** * Do we need to authenticate? (ie username & password have been provided) * * @var boolean */ public $use_authentication; /** * Constructor * * @since 1.6 * * @param array|string|null $args Proxy as a string or an array of proxy, user and password. * When passed as an array, must have exactly one (proxy) * or three elements (proxy, user, password). * * @throws \WpOrg\Requests\Exception\InvalidArgument When the passed argument is not an array, a string or null. * @throws \WpOrg\Requests\Exception\ArgumentCount On incorrect number of arguments (`proxyhttpbadargs`) */ public function __construct($args = null) { if (is_string($args)) { $this->proxy = $args; } elseif (is_array($args)) { if (count($args) === 1) { list($this->proxy) = $args; } elseif (count($args) === 3) { list($this->proxy, $this->user, $this->pass) = $args; $this->use_authentication = true; } else { throw ArgumentCount::create( 'an array with exactly one element or exactly three elements', count($args), 'proxyhttpbadargs' ); } } elseif ($args !== null) { throw InvalidArgument::create(1, '$args', 'array|string|null', gettype($args)); } } /** * Register the necessary callbacks * * @since 1.6 * @see \WpOrg\Requests\Proxy\Http::curl_before_send() * @see \WpOrg\Requests\Proxy\Http::fsockopen_remote_socket() * @see \WpOrg\Requests\Proxy\Http::fsockopen_remote_host_path() * @see \WpOrg\Requests\Proxy\Http::fsockopen_header() * @param \WpOrg\Requests\Hooks $hooks Hook system */ public function register(Hooks $hooks) { $hooks->register('curl.before_send', [$this, 'curl_before_send']); $hooks->register('fsockopen.remote_socket', [$this, 'fsockopen_remote_socket']); $hooks->register('fsockopen.remote_host_path', [$this, 'fsockopen_remote_host_path']); if ($this->use_authentication) { $hooks->register('fsockopen.after_headers', [$this, 'fsockopen_header']); } } /** * Set cURL parameters before the data is sent * * @since 1.6 * @param resource|\CurlHandle $handle cURL handle */ public function curl_before_send(&$handle) { curl_setopt($handle, CURLOPT_PROXYTYPE, CURLPROXY_HTTP); curl_setopt($handle, CURLOPT_PROXY, $this->proxy); if ($this->use_authentication) { curl_setopt($handle, CURLOPT_PROXYAUTH, CURLAUTH_ANY); curl_setopt($handle, CURLOPT_PROXYUSERPWD, $this->get_auth_string()); } } /** * Alter remote socket information before opening socket connection * * @since 1.6 * @param string $remote_socket Socket connection string */ public function fsockopen_remote_socket(&$remote_socket) { $remote_socket = $this->proxy; } /** * Alter remote path before getting stream data * * @since 1.6 * @param string $path Path to send in HTTP request string ("GET ...") * @param string $url Full URL we're requesting */ public function fsockopen_remote_host_path(&$path, $url) { $path = $url; } /** * Add extra headers to the request before sending * * @since 1.6 * @param string $out HTTP header string */ public function fsockopen_header(&$out) { $out .= sprintf("Proxy-Authorization: Basic %s\r\n", base64_encode($this->get_auth_string())); } /** * Get the authentication string (user:pass) * * @since 1.6 * @return string */ public function get_auth_string() { return $this->user . ':' . $this->pass; } }
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