FormDataPart.php
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<?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\Mime\Part\Multipart;
use Symfony\Component\Mime\Exception\InvalidArgumentException;
use Symfony\Component\Mime\Part\AbstractMultipartPart;
use Symfony\Component\Mime\Part\DataPart;
use Symfony\Component\Mime\Part\TextPart;
/**
* Implements RFC 7578.
*
* @author Fabien Potencier <fabien@symfony.com>
*/
final class FormDataPart extends AbstractMultipartPart
{
private $fields = [];
/**
* @param array<string|array|DataPart> $fields
*/
public function __construct(array $fields = [])
{
parent::__construct();
foreach ($fields as $name => $value) {
if (!\is_string($value) && !\is_array($value) && !$value instanceof TextPart) {
throw new InvalidArgumentException(sprintf('A form field value can only be a string, an array, or an instance of TextPart ("%s" given).', get_debug_type($value)));
}
$this->fields[$name] = $value;
}
// HTTP does not support \r\n in header values
$this->getHeaders()->setMaxLineLength(\PHP_INT_MAX);
}
public function getMediaSubtype(): string
{
return 'form-data';
}
public function getParts(): array
{
return $this->prepareFields($this->fields);
}
private function prepareFields(array $fields): array
{
$values = [];
$prepare = function ($item, $key, $root = null) use (&$values, &$prepare) {
if (null === $root && \is_int($key) && \is_array($item)) {
if (1 !== \count($item)) {
throw new InvalidArgumentException(sprintf('Form field values with integer keys can only have one array element, the key being the field name and the value being the field value, %d provided.', \count($item)));
}
$key = key($item);
$item = $item[$key];
}
$fieldName = null !== $root ? sprintf('%s[%s]', $root, $key) : $key;
if (\is_array($item)) {
array_walk($item, $prepare, $fieldName);
return;
}
$values[] = $this->preparePart($fieldName, $item);
};
array_walk($fields, $prepare);
return $values;
}
private function preparePart(string $name, $value): TextPart
{
if (\is_string($value)) {
return $this->configurePart($name, new TextPart($value, 'utf-8', 'plain', '8bit'));
}
return $this->configurePart($name, $value);
}
private function configurePart(string $name, TextPart $part): TextPart
{
static $r;
if (null === $r) {
$r = new \ReflectionProperty(TextPart::class, 'encoding');
$r->setAccessible(true);
}
$part->setDisposition('form-data');
$part->setName($name);
// HTTP does not support \r\n in header values
$part->getHeaders()->setMaxLineLength(\PHP_INT_MAX);
$r->setValue($part, '8bit');
return $part;
}
}