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300 lines
9.6 KiB
PHP
300 lines
9.6 KiB
PHP
<?php
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namespace Stripe\HttpClient;
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use Stripe\Stripe;
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use Stripe\Error;
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use Stripe\Util;
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// cURL constants are not defined in PHP < 5.5
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// @codingStandardsIgnoreStart
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// PSR2 requires all constants be upper case. Sadly, the CURL_SSLVERSION
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// constants do not abide by those rules.
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// Note the values 1 and 6 come from their position in the enum that
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// defines them in cURL's source code.
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if (!defined('CURL_SSLVERSION_TLSv1')) {
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define('CURL_SSLVERSION_TLSv1', 1);
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}
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if (!defined('CURL_SSLVERSION_TLSv1_2')) {
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define('CURL_SSLVERSION_TLSv1_2', 6);
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}
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// @codingStandardsIgnoreEnd
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class CurlClient implements ClientInterface
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{
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private static $instance;
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public static function instance()
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{
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if (!self::$instance) {
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self::$instance = new self();
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}
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return self::$instance;
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}
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protected $defaultOptions;
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protected $userAgentInfo;
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/**
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* CurlClient constructor.
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*
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* Pass in a callable to $defaultOptions that returns an array of CURLOPT_* values to start
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* off a request with, or an flat array with the same format used by curl_setopt_array() to
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* provide a static set of options. Note that many options are overridden later in the request
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* call, including timeouts, which can be set via setTimeout() and setConnectTimeout().
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*
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* Note that request() will silently ignore a non-callable, non-array $defaultOptions, and will
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* throw an exception if $defaultOptions returns a non-array value.
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*
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* @param array|callable|null $defaultOptions
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*/
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public function __construct($defaultOptions = null)
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{
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$this->defaultOptions = $defaultOptions;
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$this->initUserAgentInfo();
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}
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public function initUserAgentInfo()
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{
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$curlVersion = curl_version();
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$this->userAgentInfo = array(
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'httplib' => 'curl ' . $curlVersion['version'],
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'ssllib' => $curlVersion['ssl_version'],
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);
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}
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public function getDefaultOptions()
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{
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return $this->defaultOptions;
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}
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public function getUserAgentInfo()
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{
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return $this->userAgentInfo;
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}
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// USER DEFINED TIMEOUTS
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const DEFAULT_TIMEOUT = 80;
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const DEFAULT_CONNECT_TIMEOUT = 30;
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private $timeout = self::DEFAULT_TIMEOUT;
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private $connectTimeout = self::DEFAULT_CONNECT_TIMEOUT;
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public function setTimeout($seconds)
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{
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$this->timeout = (int) max($seconds, 0);
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return $this;
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}
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public function setConnectTimeout($seconds)
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{
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$this->connectTimeout = (int) max($seconds, 0);
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return $this;
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}
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public function getTimeout()
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{
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return $this->timeout;
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}
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public function getConnectTimeout()
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{
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return $this->connectTimeout;
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}
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// END OF USER DEFINED TIMEOUTS
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public function request($method, $absUrl, $headers, $params, $hasFile)
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{
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$curl = curl_init();
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$method = strtolower($method);
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$opts = array();
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if (is_callable($this->defaultOptions)) { // call defaultOptions callback, set options to return value
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$opts = call_user_func_array($this->defaultOptions, func_get_args());
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if (!is_array($opts)) {
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throw new Error\Api("Non-array value returned by defaultOptions CurlClient callback");
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}
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} elseif (is_array($this->defaultOptions)) { // set default curlopts from array
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$opts = $this->defaultOptions;
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}
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if ($method == 'get') {
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if ($hasFile) {
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throw new Error\Api(
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"Issuing a GET request with a file parameter"
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);
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}
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$opts[CURLOPT_HTTPGET] = 1;
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if (count($params) > 0) {
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$encoded = self::encode($params);
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$absUrl = "$absUrl?$encoded";
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}
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} elseif ($method == 'post') {
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$opts[CURLOPT_POST] = 1;
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$opts[CURLOPT_POSTFIELDS] = $hasFile ? $params : self::encode($params);
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} elseif ($method == 'delete') {
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$opts[CURLOPT_CUSTOMREQUEST] = 'DELETE';
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if (count($params) > 0) {
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$encoded = self::encode($params);
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$absUrl = "$absUrl?$encoded";
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}
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} else {
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throw new Error\Api("Unrecognized method $method");
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}
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// Create a callback to capture HTTP headers for the response
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$rheaders = array();
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$headerCallback = function ($curl, $header_line) use (&$rheaders) {
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// Ignore the HTTP request line (HTTP/1.1 200 OK)
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if (strpos($header_line, ":") === false) {
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return strlen($header_line);
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}
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list($key, $value) = explode(":", trim($header_line), 2);
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$rheaders[trim($key)] = trim($value);
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return strlen($header_line);
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};
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// By default for large request body sizes (> 1024 bytes), cURL will
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// send a request without a body and with a `Expect: 100-continue`
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// header, which gives the server a chance to respond with an error
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// status code in cases where one can be determined right away (say
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// on an authentication problem for example), and saves the "large"
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// request body from being ever sent.
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//
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// Unfortunately, the bindings don't currently correctly handle the
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// success case (in which the server sends back a 100 CONTINUE), so
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// we'll error under that condition. To compensate for that problem
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// for the time being, override cURL's behavior by simply always
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// sending an empty `Expect:` header.
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array_push($headers, 'Expect: ');
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$absUrl = Util\Util::utf8($absUrl);
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$opts[CURLOPT_URL] = $absUrl;
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$opts[CURLOPT_RETURNTRANSFER] = true;
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$opts[CURLOPT_CONNECTTIMEOUT] = $this->connectTimeout;
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$opts[CURLOPT_TIMEOUT] = $this->timeout;
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$opts[CURLOPT_HEADERFUNCTION] = $headerCallback;
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$opts[CURLOPT_HTTPHEADER] = $headers;
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if (!Stripe::$verifySslCerts) {
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$opts[CURLOPT_SSL_VERIFYPEER] = false;
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}
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curl_setopt_array($curl, $opts);
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$rbody = curl_exec($curl);
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if (!defined('CURLE_SSL_CACERT_BADFILE')) {
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define('CURLE_SSL_CACERT_BADFILE', 77); // constant not defined in PHP
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}
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$errno = curl_errno($curl);
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if ($errno == CURLE_SSL_CACERT ||
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$errno == CURLE_SSL_PEER_CERTIFICATE ||
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$errno == CURLE_SSL_CACERT_BADFILE
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) {
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array_push(
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$headers,
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'X-Stripe-Client-Info: {"ca":"using Stripe-supplied CA bundle"}'
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);
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$cert = self::caBundle();
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curl_setopt($curl, CURLOPT_HTTPHEADER, $headers);
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curl_setopt($curl, CURLOPT_CAINFO, $cert);
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$rbody = curl_exec($curl);
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}
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if ($rbody === false) {
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$errno = curl_errno($curl);
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$message = curl_error($curl);
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curl_close($curl);
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$this->handleCurlError($absUrl, $errno, $message);
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}
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$rcode = curl_getinfo($curl, CURLINFO_HTTP_CODE);
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curl_close($curl);
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return array($rbody, $rcode, $rheaders);
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}
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/**
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* @param number $errno
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* @param string $message
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* @throws Error\ApiConnection
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*/
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private function handleCurlError($url, $errno, $message)
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{
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switch ($errno) {
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case CURLE_COULDNT_CONNECT:
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case CURLE_COULDNT_RESOLVE_HOST:
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case CURLE_OPERATION_TIMEOUTED:
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$msg = "Could not connect to Stripe ($url). Please check your "
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. "internet connection and try again. If this problem persists, "
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. "you should check Stripe's service status at "
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. "https://twitter.com/stripestatus, or";
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break;
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case CURLE_SSL_CACERT:
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case CURLE_SSL_PEER_CERTIFICATE:
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$msg = "Could not verify Stripe's SSL certificate. Please make sure "
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. "that your network is not intercepting certificates. "
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. "(Try going to $url in your browser.) "
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. "If this problem persists,";
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break;
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default:
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$msg = "Unexpected error communicating with Stripe. "
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. "If this problem persists,";
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}
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$msg .= " let us know at support@stripe.com.";
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$msg .= "\n\n(Network error [errno $errno]: $message)";
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throw new Error\ApiConnection($msg);
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}
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private static function caBundle()
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{
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return dirname(__FILE__) . '/../../data/ca-certificates.crt';
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}
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/**
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* @param array $arr An map of param keys to values.
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* @param string|null $prefix
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*
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* Only public for testability, should not be called outside of CurlClient
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*
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* @return string A querystring, essentially.
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*/
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public static function encode($arr, $prefix = null)
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{
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if (!is_array($arr)) {
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return $arr;
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}
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$r = array();
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foreach ($arr as $k => $v) {
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if (is_null($v)) {
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continue;
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}
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if ($prefix) {
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if ($k !== null && (!is_int($k) || is_array($v))) {
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$k = $prefix."[".$k."]";
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} else {
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$k = $prefix."[]";
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}
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}
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if (is_array($v)) {
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$enc = self::encode($v, $k);
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if ($enc) {
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$r[] = $enc;
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}
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} else {
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$r[] = urlencode($k)."=".urlencode($v);
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}
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}
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return implode("&", $r);
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}
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}
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