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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;
}
}