<?php

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namespace WPForms\Vendor\Stripe;

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/**

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* Class ApiRequestor.

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*/

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class ApiRequestor

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{

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/**

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* @var null|string

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*/

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private $_apiKey;

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/**

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* @var string

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*/

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private $_apiBase;

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/**

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* @var HttpClient\ClientInterface

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*/

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private static $_httpClient;

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/**

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* @var HttpClient\StreamingClientInterface

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*/

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private static $_streamingHttpClient;

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/**

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* @var RequestTelemetry

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*/

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private static $requestTelemetry;

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private static $OPTIONS_KEYS = ['api_key', 'idempotency_key', 'stripe_account', 'stripe_version', 'api_base'];

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/**

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* ApiRequestor constructor.

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*

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* @param null|string $apiKey

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* @param null|string $apiBase

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*/

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public function __construct($apiKey = null, $apiBase = null)

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{

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$this->_apiKey = $apiKey;

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if (!$apiBase) {

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$apiBase = Stripe::$apiBase;

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}

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$this->_apiBase = $apiBase;

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}

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/**

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* Creates a telemetry json blob for use in 'X-Stripe-Client-Telemetry' headers.

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*

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* @static

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*

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* @param RequestTelemetry $requestTelemetry

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*

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* @return string

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*/

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private static function _telemetryJson($requestTelemetry)

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{

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$payload = ['last_request_metrics' => ['request_id' => $requestTelemetry->requestId, 'request_duration_ms' => $requestTelemetry->requestDuration]];

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if (\count($requestTelemetry->usage) > 0) {

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$payload['last_request_metrics']['usage'] = $requestTelemetry->usage;

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}

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$result = \json_encode($payload);

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if (\false !== $result) {

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return $result;

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}

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Stripe::getLogger()->error('Serializing telemetry payload failed!');

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return '{}';

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}

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/**

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* @static

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*

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* @param ApiResource|array|bool|mixed $d

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*

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* @return ApiResource|array|mixed|string

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*/

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private static function _encodeObjects($d)

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{

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if ($d instanceof ApiResource) {

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return Util\Util::utf8($d->id);

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}

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if (\true === $d) {

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return 'true';

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}

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if (\false === $d) {

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return 'false';

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}

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if (\is_array($d)) {

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$res = [];

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foreach ($d as $k => $v) {

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$res[$k] = self::_encodeObjects($v);

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}

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return $res;

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}

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return Util\Util::utf8($d);

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}

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/**

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* @param 'delete'|'get'|'post' $method

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* @param string $url

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* @param null|array $params

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* @param null|array $headers

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* @param string[] $usage

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*

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* @throws Exception\ApiErrorException

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*

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* @return array tuple containing (ApiReponse, API key)

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*/

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public function request($method, $url, $params = null, $headers = null, $usage = [])

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{

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$params = $params ?: [];

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$headers = $headers ?: [];

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list($rbody, $rcode, $rheaders, $myApiKey) = $this->_requestRaw($method, $url, $params, $headers, $usage);

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$json = $this->_interpretResponse($rbody, $rcode, $rheaders);

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$resp = new ApiResponse($rbody, $rcode, $rheaders, $json);

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return [$resp, $myApiKey];

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}

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/**

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* @param 'delete'|'get'|'post' $method

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* @param string $url

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* @param callable $readBodyChunkCallable

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* @param null|array $params

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* @param null|array $headers

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* @param string[] $usage

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*

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* @throws Exception\ApiErrorException

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*/

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public function requestStream($method, $url, $readBodyChunkCallable, $params = null, $headers = null, $usage = [])

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{

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$params = $params ?: [];

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$headers = $headers ?: [];

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list($rbody, $rcode, $rheaders, $myApiKey) = $this->_requestRawStreaming($method, $url, $params, $headers, $usage, $readBodyChunkCallable);

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if ($rcode >= 300) {

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$this->_interpretResponse($rbody, $rcode, $rheaders);

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}

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}

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/**

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* @param string $rbody a JSON string

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* @param int $rcode

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* @param array $rheaders

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* @param array $resp

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*

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* @throws Exception\UnexpectedValueException

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* @throws Exception\ApiErrorException

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*/

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public function handleErrorResponse($rbody, $rcode, $rheaders, $resp)

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{

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if (!\is_array($resp) || !isset($resp['error'])) {

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$msg = "Invalid response object from API: {$rbody} " . "(HTTP response code was {$rcode})";

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throw new Exception\UnexpectedValueException($msg);

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}

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$errorData = $resp['error'];

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$error = null;

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if (\is_string($errorData)) {

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$error = self::_specificOAuthError($rbody, $rcode, $rheaders, $resp, $errorData);

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}

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if (!$error) {

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$error = self::_specificAPIError($rbody, $rcode, $rheaders, $resp, $errorData);

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}

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throw $error;

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}

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/**

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* @static

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*

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* @param string $rbody

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* @param int $rcode

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* @param array $rheaders

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* @param array $resp

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* @param array $errorData

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*

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* @return Exception\ApiErrorException

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*/

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private static function _specificAPIError($rbody, $rcode, $rheaders, $resp, $errorData)

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{

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$msg = isset($errorData['message']) ? $errorData['message'] : null;

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$param = isset($errorData['param']) ? $errorData['param'] : null;

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$code = isset($errorData['code']) ? $errorData['code'] : null;

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$type = isset($errorData['type']) ? $errorData['type'] : null;

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$declineCode = isset($errorData['decline_code']) ? $errorData['decline_code'] : null;

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switch ($rcode) {

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case 400:

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// 'rate_limit' code is deprecated, but left here for backwards compatibility

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// for API versions earlier than 2015-09-08

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if ('rate_limit' === $code) {

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return Exception\RateLimitException::factory($msg, $rcode, $rbody, $resp, $rheaders, $code, $param);

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}

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if ('idempotency_error' === $type) {

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return Exception\IdempotencyException::factory($msg, $rcode, $rbody, $resp, $rheaders, $code);

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}

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// no break

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case 404:

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return Exception\InvalidRequestException::factory($msg, $rcode, $rbody, $resp, $rheaders, $code, $param);

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case 401:

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return Exception\AuthenticationException::factory($msg, $rcode, $rbody, $resp, $rheaders, $code);

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case 402:

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return Exception\CardException::factory($msg, $rcode, $rbody, $resp, $rheaders, $code, $declineCode, $param);

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case 403:

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return Exception\PermissionException::factory($msg, $rcode, $rbody, $resp, $rheaders, $code);

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case 429:

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return Exception\RateLimitException::factory($msg, $rcode, $rbody, $resp, $rheaders, $code, $param);

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default:

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return Exception\UnknownApiErrorException::factory($msg, $rcode, $rbody, $resp, $rheaders, $code);

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}

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}

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/**

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* @static

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*

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* @param bool|string $rbody

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* @param int $rcode

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* @param array $rheaders

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* @param array $resp

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* @param string $errorCode

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*

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* @return Exception\OAuth\OAuthErrorException

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*/

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private static function _specificOAuthError($rbody, $rcode, $rheaders, $resp, $errorCode)

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{

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$description = isset($resp['error_description']) ? $resp['error_description'] : $errorCode;

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switch ($errorCode) {

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case 'invalid_client':

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return Exception\OAuth\InvalidClientException::factory($description, $rcode, $rbody, $resp, $rheaders, $errorCode);

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case 'invalid_grant':

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return Exception\OAuth\InvalidGrantException::factory($description, $rcode, $rbody, $resp, $rheaders, $errorCode);

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case 'invalid_request':

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return Exception\OAuth\InvalidRequestException::factory($description, $rcode, $rbody, $resp, $rheaders, $errorCode);

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case 'invalid_scope':

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return Exception\OAuth\InvalidScopeException::factory($description, $rcode, $rbody, $resp, $rheaders, $errorCode);

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case 'unsupported_grant_type':

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return Exception\OAuth\UnsupportedGrantTypeException::factory($description, $rcode, $rbody, $resp, $rheaders, $errorCode);

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case 'unsupported_response_type':

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return Exception\OAuth\UnsupportedResponseTypeException::factory($description, $rcode, $rbody, $resp, $rheaders, $errorCode);

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default:

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return Exception\OAuth\UnknownOAuthErrorException::factory($description, $rcode, $rbody, $resp, $rheaders, $errorCode);

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}

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}

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/**

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* @static

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*

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* @param null|array $appInfo

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*

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* @return null|string

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*/

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private static function _formatAppInfo($appInfo)

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{

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if (null !== $appInfo) {

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$string = $appInfo['name'];

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if (null !== $appInfo['version']) {

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$string .= '/' . $appInfo['version'];

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}

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if (null !== $appInfo['url']) {

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$string .= ' (' . $appInfo['url'] . ')';

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}

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return $string;

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}

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return null;

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}

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/**

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* @static

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*

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* @param string $disableFunctionsOutput - String value of the 'disable_function' setting, as output by \ini_get('disable_functions')

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* @param string $functionName - Name of the function we are interesting in seeing whether or not it is disabled

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*

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* @return bool

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*/

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private static function _isDisabled($disableFunctionsOutput, $functionName)

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{

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$disabledFunctions = \explode(',', $disableFunctionsOutput);

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foreach ($disabledFunctions as $disabledFunction) {

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if (\trim($disabledFunction) === $functionName) {

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return \true;

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}

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}

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return \false;

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}

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/**

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* @static

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*

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* @param string $apiKey

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* @param null $clientInfo

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*

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* @return array

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*/

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private static function _defaultHeaders($apiKey, $clientInfo = null)

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{

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$uaString = 'Stripe/v1 PhpBindings/' . Stripe::VERSION;

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$langVersion = \PHP_VERSION;

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$uname_disabled = self::_isDisabled(\ini_get('disable_functions'), 'php_uname');

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$uname = $uname_disabled ? '(disabled)' : \php_uname();

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$appInfo = Stripe::getAppInfo();

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$ua = ['bindings_version' => Stripe::VERSION, 'lang' => 'php', 'lang_version' => $langVersion, 'publisher' => 'stripe', 'uname' => $uname];

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if ($clientInfo) {

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$ua = \array_merge($clientInfo, $ua);

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}

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if (null !== $appInfo) {

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$uaString .= ' ' . self::_formatAppInfo($appInfo);

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$ua['application'] = $appInfo;

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}

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return ['X-Stripe-Client-User-Agent' => \json_encode($ua), 'User-Agent' => $uaString, 'Authorization' => 'Bearer ' . $apiKey, 'Stripe-Version' => Stripe::getApiVersion()];

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}

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private function _prepareRequest($method, $url, $params, $headers)

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{

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$myApiKey = $this->_apiKey;

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if (!$myApiKey) {

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$myApiKey = Stripe::$apiKey;

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}

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if (!$myApiKey) {

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$msg = 'No API key provided. (HINT: set your API key using ' . '"Stripe::setApiKey(<API-KEY>)". You can generate API keys from ' . 'the Stripe web interface. See https://stripe.com/api for ' . 'details, or email support@stripe.com if you have any questions.';

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throw new Exception\AuthenticationException($msg);

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}

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// Clients can supply arbitrary additional keys to be included in the

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// X-Stripe-Client-User-Agent header via the optional getUserAgentInfo()

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// method

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$clientUAInfo = null;

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if (\method_exists($this->httpClient(), 'getUserAgentInfo')) {

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$clientUAInfo = $this->httpClient()->getUserAgentInfo();

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}

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if ($params && \is_array($params)) {

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$optionKeysInParams = \array_filter(self::$OPTIONS_KEYS, function ($key) use($params) {

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return \array_key_exists($key, $params);

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});

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if (\count($optionKeysInParams) > 0) {

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$message = \sprintf('Options found in $params: %s. Options should ' . 'be passed in their own array after $params. (HINT: pass an ' . 'empty array to $params if you do not have any.)', \implode(', ', $optionKeysInParams));

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\trigger_error($message, \E_USER_WARNING);

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}

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}

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$absUrl = $this->_apiBase . $url;

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$params = self::_encodeObjects($params);

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$defaultHeaders = $this->_defaultHeaders($myApiKey, $clientUAInfo);

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if (Stripe::$accountId) {

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$defaultHeaders['Stripe-Account'] = Stripe::$accountId;

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}

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if (Stripe::$enableTelemetry && null !== self::$requestTelemetry) {

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$defaultHeaders['X-Stripe-Client-Telemetry'] = self::_telemetryJson(self::$requestTelemetry);

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}

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$hasFile = \false;

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foreach ($params as $k => $v) {

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if (\is_resource($v)) {

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$hasFile = \true;

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$params[$k] = self::_processResourceParam($v);

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} elseif ($v instanceof \CURLFile) {

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$hasFile = \true;

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}

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}

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if ($hasFile) {

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$defaultHeaders['Content-Type'] = 'multipart/form-data';

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} else {

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$defaultHeaders['Content-Type'] = 'application/x-www-form-urlencoded';

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}

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$combinedHeaders = \array_merge($defaultHeaders, $headers);

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$rawHeaders = [];

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foreach ($combinedHeaders as $header => $value) {

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$rawHeaders[] = $header . ': ' . $value;

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}

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return [$absUrl, $rawHeaders, $params, $hasFile, $myApiKey];

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}

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/**

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* @param 'delete'|'get'|'post' $method

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* @param string $url

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* @param array $params

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* @param array $headers

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* @param string[] $usage

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*

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* @throws Exception\AuthenticationException

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* @throws Exception\ApiConnectionException

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*

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* @return array

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*/

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private function _requestRaw($method, $url, $params, $headers, $usage)

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{

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list($absUrl, $rawHeaders, $params, $hasFile, $myApiKey) = $this->_prepareRequest($method, $url, $params, $headers);

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$requestStartMs = Util\Util::currentTimeMillis();

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list($rbody, $rcode, $rheaders) = $this->httpClient()->request($method, $absUrl, $rawHeaders, $params, $hasFile);

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if (isset($rheaders['request-id']) && \is_string($rheaders['request-id']) && '' !== $rheaders['request-id']) {

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self::$requestTelemetry = new RequestTelemetry($rheaders['request-id'], Util\Util::currentTimeMillis() - $requestStartMs, $usage);

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}

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return [$rbody, $rcode, $rheaders, $myApiKey];

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}

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/**

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* @param 'delete'|'get'|'post' $method

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* @param string $url

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* @param array $params

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* @param array $headers

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* @param string[] $usage

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* @param callable $readBodyChunkCallable

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*

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* @throws Exception\AuthenticationException

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* @throws Exception\ApiConnectionException

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*

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* @return array

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*/

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private function _requestRawStreaming($method, $url, $params, $headers, $usage, $readBodyChunkCallable)

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{

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list($absUrl, $rawHeaders, $params, $hasFile, $myApiKey) = $this->_prepareRequest($method, $url, $params, $headers);

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$requestStartMs = Util\Util::currentTimeMillis();

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list($rbody, $rcode, $rheaders) = $this->streamingHttpClient()->requestStream($method, $absUrl, $rawHeaders, $params, $hasFile, $readBodyChunkCallable);

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if (isset($rheaders['request-id']) && \is_string($rheaders['request-id']) && '' !== $rheaders['request-id']) {

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self::$requestTelemetry = new RequestTelemetry($rheaders['request-id'], Util\Util::currentTimeMillis() - $requestStartMs);

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}

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return [$rbody, $rcode, $rheaders, $myApiKey];

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}

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/**

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* @param resource $resource

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*

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* @throws Exception\InvalidArgumentException

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*

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* @return \CURLFile|string

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*/

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private function _processResourceParam($resource)

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{

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if ('stream' !== \get_resource_type($resource)) {

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throw new Exception\InvalidArgumentException('Attempted to upload a resource that is not a stream');

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}

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$metaData = \stream_get_meta_data($resource);

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if ('plainfile' !== $metaData['wrapper_type']) {

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throw new Exception\InvalidArgumentException('Only plainfile resource streams are supported');

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}

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// We don't have the filename or mimetype, but the API doesn't care

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return new \CURLFile($metaData['uri']);

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}

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/**

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* @param string $rbody

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* @param int $rcode

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* @param array $rheaders

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*

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* @throws Exception\UnexpectedValueException

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* @throws Exception\ApiErrorException

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*

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* @return array

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*/

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private function _interpretResponse($rbody, $rcode, $rheaders)

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{

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$resp = \json_decode($rbody, \true);

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$jsonError = \json_last_error();

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if (null === $resp && \JSON_ERROR_NONE !== $jsonError) {

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$msg = "Invalid response body from API: {$rbody} " . "(HTTP response code was {$rcode}, json_last_error() was {$jsonError})";

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throw new Exception\UnexpectedValueException($msg, $rcode);

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}

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if ($rcode < 200 || $rcode >= 300) {

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$this->handleErrorResponse($rbody, $rcode, $rheaders, $resp);

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}

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return $resp;

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}

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/**

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* @static

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*

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* @param HttpClient\ClientInterface $client

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*/

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public static function setHttpClient($client)

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{

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self::$_httpClient = $client;

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}

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/**

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* @static

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*

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* @param HttpClient\StreamingClientInterface $client

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*/

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public static function setStreamingHttpClient($client)

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{

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self::$_streamingHttpClient = $client;

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}

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/**

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* @static

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*

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* Resets any stateful telemetry data

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*/

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public static function resetTelemetry()

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{

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self::$requestTelemetry = null;

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}

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/**

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* @return HttpClient\ClientInterface

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*/

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private function httpClient()

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{

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if (!self::$_httpClient) {

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self::$_httpClient = HttpClient\CurlClient::instance();

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}

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return self::$_httpClient;

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}

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/**

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* @return HttpClient\StreamingClientInterface

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*/

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private function streamingHttpClient()

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{

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if (!self::$_streamingHttpClient) {

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self::$_streamingHttpClient = HttpClient\CurlClient::instance();

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}

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return self::$_streamingHttpClient;

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}

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}

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