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Edit File : StreamedResponse.php \| Size : 3.18 KB
<?php /* * This file is part of the Symfony package. * * (c) Fabien Potencier <fabien@symfony.com> * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. / namespace Symfony\Component\HttpFoundation; /* * StreamedResponse represents a streamed HTTP response. * * A StreamedResponse uses a callback for its content. * * The callback should use the standard PHP functions like echo * to stream the response back to the client. The flush() function * can also be used if needed. * * @see flush() * * @author Fabien Potencier <fabien@symfony.com> / class StreamedResponse extends Response { protected $callback; protected $streamed; private $headersSent; /* * @param callable\|null $callback A valid PHP callback or null to set it later * @param int $status The response status code * @param array $headers An array of response headers / public function __construct(callable $callback = null, int $status = 200, array $headers = []) { parent::__construct(null, $status, $headers); if (null !== $callback) { $this->setCallback($callback); } $this->streamed = false; $this->headersSent = false; } /* * Factory method for chainability. * * @param callable\|null $callback A valid PHP callback or null to set it later * @param int $status The response status code * @param array $headers An array of response headers * * @return static / public static function create($callback = null, $status = 200, $headers = []) { return new static($callback, $status, $headers); } /* * Sets the PHP callback associated with this Response. * * @return $this / public function setCallback(callable $callback) { $this->callback = $callback; return $this; } /* * {@inheritdoc} * * This method only sends the headers once. * * @return $this / public function sendHeaders() { if ($this->headersSent) { return $this; } $this->headersSent = true; return parent::sendHeaders(); } /* * {@inheritdoc} * * This method only sends the content once. * * @return $this / public function sendContent() { if ($this->streamed) { return $this; } $this->streamed = true; if (null === $this->callback) { throw new \LogicException('The Response callback must not be null.'); } ($this->callback)(); return $this; } /* * {@inheritdoc} * * @throws \LogicException when the content is not null * * @return $this / public function setContent($content) { if (null !== $content) { throw new \LogicException('The content cannot be set on a StreamedResponse instance.'); } $this->streamed = true; return $this; } /* * {@inheritdoc} */ public function getContent() { return false; } } Back

Edit File : StreamedResponse.php | Size : 3.18 KB

<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\HttpFoundation;

/**
 * StreamedResponse represents a streamed HTTP response.
 *
 * A StreamedResponse uses a callback for its content.
 *
 * The callback should use the standard PHP functions like echo
 * to stream the response back to the client. The flush() function
 * can also be used if needed.
 *
 * @see flush()
 *
 * @author Fabien Potencier <fabien@symfony.com>
 */
class StreamedResponse extends Response
{
    protected $callback;
    protected $streamed;
    private $headersSent;

/**
     * @param callable|null $callback A valid PHP callback or null to set it later
     * @param int           $status   The response status code
     * @param array         $headers  An array of response headers
     */
    public function __construct(callable $callback = null, int $status = 200, array $headers = [])
    {
        parent::__construct(null, $status, $headers);

if (null !== $callback) {
            $this->setCallback($callback);
        }
        $this->streamed = false;
        $this->headersSent = false;
    }

/**
     * Factory method for chainability.
     *
     * @param callable|null $callback A valid PHP callback or null to set it later
     * @param int           $status   The response status code
     * @param array         $headers  An array of response headers
     *
     * @return static
     */
    public static function create($callback = null, $status = 200, $headers = [])
    {
        return new static($callback, $status, $headers);
    }

/**
     * Sets the PHP callback associated with this Response.
     *
     * @return $this
     */
    public function setCallback(callable $callback)
    {
        $this->callback = $callback;

return $this;
    }

/**
     * {@inheritdoc}
     *
     * This method only sends the headers once.
     *
     * @return $this
     */
    public function sendHeaders()
    {
        if ($this->headersSent) {
            return $this;
        }

$this->headersSent = true;

return parent::sendHeaders();
    }

/**
     * {@inheritdoc}
     *
     * This method only sends the content once.
     *
     * @return $this
     */
    public function sendContent()
    {
        if ($this->streamed) {
            return $this;
        }

$this->streamed = true;

if (null === $this->callback) {
            throw new \LogicException('The Response callback must not be null.');
        }

($this->callback)();

return $this;
    }

/**
     * {@inheritdoc}
     *
     * @throws \LogicException when the content is not null
     *
     * @return $this
     */
    public function setContent($content)
    {
        if (null !== $content) {
            throw new \LogicException('The content cannot be set on a StreamedResponse instance.');
        }

$this->streamed = true;

return $this;
    }

/**
     * {@inheritdoc}
     */
    public function getContent()
    {
        return false;
    }
}

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