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<?php
namespace GuzzleHttp\Exception;

use Psr\Http\Message\RequestInterface;
use Psr\Http\Message\ResponseInterface;
use GuzzleHttp\Promise\PromiseInterface;
use Psr\Http\Message\UriInterface;

/**
 * HTTP Request exception
 */
class RequestException extends TransferException
{
    /** @var RequestInterface */
    private $request;

/** @var ResponseInterface */
    private $response;

/** @var array */
    private $handlerContext;

public function __construct(
        $message,
        RequestInterface $request,
        ResponseInterface $response = null,
        \Exception $previous = null,
        array $handlerContext = []
    ) {
        // Set the code of the exception if the response is set and not future.
        $code = $response && !($response instanceof PromiseInterface)
            ? $response->getStatusCode()
            : 0;
        parent::__construct($message, $code, $previous);
        $this->request = $request;
        $this->response = $response;
        $this->handlerContext = $handlerContext;
    }

/**
     * Wrap non-RequestExceptions with a RequestException
     *
     * @param RequestInterface $request
     * @param \Exception       $e
     *
     * @return RequestException
     */
    public static function wrapException(RequestInterface $request, \Exception $e)
    {
        return $e instanceof RequestException
            ? $e
            : new RequestException($e->getMessage(), $request, null, $e);
    }

/**
     * Factory method to create a new exception with a normalized error message
     *
     * @param RequestInterface  $request  Request
     * @param ResponseInterface $response Response received
     * @param \Exception        $previous Previous exception
     * @param array             $ctx      Optional handler context.
     *
     * @return self
     */
    public static function create(
        RequestInterface $request,
        ResponseInterface $response = null,
        \Exception $previous = null,
        array $ctx = []
    ) {
        if (!$response) {
            return new self(
                'Error completing request',
                $request,
                null,
                $previous,
                $ctx
            );
        }

$level = (int) floor($response->getStatusCode() / 100);
        if ($level === 4) {
            $label = 'Client error';
            $className = ClientException::class;
        } elseif ($level === 5) {
            $label = 'Server error';
            $className = ServerException::class;
        } else {
            $label = 'Unsuccessful request';
            $className = __CLASS__;
        }

$uri = $request->getUri();
        $uri = static::obfuscateUri($uri);

// Client Error: `GET /` resulted in a `404 Not Found` response:
        // <html> ... (truncated)
        $message = sprintf(
            '%s: `%s %s` resulted in a `%s %s` response',
            $label,
            $request->getMethod(),
            $uri,
            $response->getStatusCode(),
            $response->getReasonPhrase()
        );

$summary = static::getResponseBodySummary($response);

if ($summary !== null) {
            $message .= ":\n{$summary}\n";
        }

return new $className($message, $request, $response, $previous, $ctx);
    }

/**
     * Get a short summary of the response
     *
     * Will return `null` if the response is not printable.
     *
     * @param ResponseInterface $response
     *
     * @return string|null
     */
    public static function getResponseBodySummary(ResponseInterface $response)
    {
        $body = $response->getBody();

if (!$body->isSeekable()) {
            return null;
        }

$size = $body->getSize();

if ($size === 0) {
            return null;
        }

$summary = $body->read(120);
        $body->rewind();

if ($size > 120) {
            $summary .= ' (truncated...)';
        }

// Matches any printable character, including unicode characters:
        // letters, marks, numbers, punctuation, spacing, and separators.
        if (preg_match('/[^\pL\pM\pN\pP\pS\pZ\n\r\t]/', $summary)) {
            return null;
        }

return $summary;
    }

/**
     * Obfuscates URI if there is an username and a password present
     *
     * @param UriInterface $uri
     *
     * @return UriInterface
     */
    private static function obfuscateUri($uri)
    {
        $userInfo = $uri->getUserInfo();

if (false !== ($pos = strpos($userInfo, ':'))) {
            return $uri->withUserInfo(substr($userInfo, 0, $pos), '***');
        }

return $uri;
    }

/**
     * Get the request that caused the exception
     *
     * @return RequestInterface
     */
    public function getRequest()
    {
        return $this->request;
    }

/**
     * Get the associated response
     *
     * @return ResponseInterface|null
     */
    public function getResponse()
    {
        return $this->response;
    }

/**
     * Check if a response was received
     *
     * @return bool
     */
    public function hasResponse()
    {
        return $this->response !== null;
    }

/**
     * Get contextual information about the error from the underlying handler.
     *
     * The contents of this array will vary depending on which handler you are
     * using. It may also be just an empty array. Relying on this data will
     * couple you to a specific handler, but can give more debug information
     * when needed.
     *
     * @return array
     */
    public function getHandlerContext()
    {
        return $this->handlerContext;
    }
}