<?php

namespace PSX\Http\Environment;

/**
 * Represents an HTTP response which is generated i.e. by a controller
 *
 * @author  Christoph Kappestein <christoph.kappestein@gmail.com>
 * @license http://www.apache.org/licenses/LICENSE-2.0
 * @link    http://phpsx.org
 */
interface HttpResponseInterface
{
    /**
     * Returns the status code of the HTTP response
     *
     * @see https://tools.ietf.org/html/rfc7231#section-6
     * @return integer
     */
    public function getStatusCode();

    /**
     * Returns all available headers of the response. The header keys are all
     * lowercased
     *
     * @return array
     */
    public function getHeaders();

    /**
     * Returns a single header based on the provided header name or null if the
     * header does not exist. The name is case insensitive
     *
     * @param string $name
     * @return string|null
     */
    public function getHeader($name);

    /**
     * Returns the body of the response
     *
     * @return mixed
     */
    public function getBody();
}
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