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SymfonyRequestBridge.php
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SymfonyRequestBridge.php
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<?php
namespace Runtime\Bref;
use Bref\Context\Context;
use Bref\Event\Http\HttpRequestEvent;
use Bref\Event\Http\HttpResponse;
use Riverline\MultiPartParser\StreamedPart;
use Symfony\Component\HttpFoundation\File\UploadedFile;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
/**
* Bridges Symfony requests and responses with API Gateway or ALB event/response
* formats.
*
* @author Tobias Nyholm <[email protected]>
*
* @internal
*/
class SymfonyRequestBridge
{
public static function convertRequest(HttpRequestEvent $event, Context $context): Request
{
Request::setTrustedProxies(['127.0.0.1'], Request::HEADER_X_FORWARDED_FOR | Request::HEADER_X_FORWARDED_HOST | Request::HEADER_X_FORWARDED_PORT | Request::HEADER_X_FORWARDED_PROTO);
// CGI Version 1.1 - Section 4.1
$server = array_filter([
'AUTH_TYPE' => $event->getHeaders()['auth-type'] ?? null, // 4.1.1
'CONTENT_LENGTH' => $event->getHeaders()['content-length'][0] ?? null, // 4.1.2
'CONTENT_TYPE' => $event->getContentType(), // 4.1.3
'QUERY_STRING' => $event->getQueryString(), // 4.1.7
'REQUEST_METHOD' => $event->getMethod(), // 4.1.12
'SERVER_PORT' => $event->getServerPort(), // 4.1.16
'SERVER_PROTOCOL' => 'HTTP/'.$event->getProtocolVersion(), // 4.1.16
'DOCUMENT_ROOT' => getcwd(),
'REQUEST_TIME' => time(),
'REQUEST_TIME_FLOAT' => microtime(true),
'REQUEST_URI' => $event->getUri(),
'REMOTE_ADDR' => '127.0.0.1',
'LAMBDA_INVOCATION_CONTEXT' => json_encode($context),
'LAMBDA_REQUEST_CONTEXT' => json_encode($event->getRequestContext()),
], fn ($value) => null !== $value);
foreach ($event->getHeaders() as $name => $values) {
$server['HTTP_'.strtoupper($name)] = $values[0];
}
[$files, $parsedBody, $bodyString] = self::parseBodyAndUploadedFiles($event);
return new Request(
$event->getQueryParameters(),
$parsedBody ?? [],
[], // Attributes
$event->getCookies(),
$files,
$server,
$bodyString
);
}
public static function convertResponse(Response $response): HttpResponse
{
return new HttpResponse($response->getContent(), $response->headers->all(), $response->getStatusCode());
}
private static function parseBodyAndUploadedFiles(HttpRequestEvent $event): array
{
$bodyString = $event->getBody();
$files = [];
$parsedBody = null;
$contentType = $event->getContentType();
if (null !== $contentType && 'POST' === $event->getMethod()) {
if ('application/x-www-form-urlencoded' === $contentType) {
parse_str($bodyString, $parsedBody);
} else {
$stream = fopen('php://temp', 'rw');
fwrite($stream, "Content-type: $contentType\r\n\r\n".$bodyString);
rewind($stream);
$document = new StreamedPart($stream);
if ($document->isMultiPart()) {
$bodyString = '';
$parsedBody = [];
foreach ($document->getParts() as $part) {
if ($part->isFile()) {
$tmpPath = tempnam(sys_get_temp_dir(), 'bref_upload_');
if (false === $tmpPath) {
throw new \RuntimeException('Unable to create a temporary directory');
}
file_put_contents($tmpPath, $part->getBody());
if (0 !== filesize($tmpPath) && '' !== $part->getFileName()) {
$file = new UploadedFile($tmpPath, $part->getFileName(), $part->getMimeType(), UPLOAD_ERR_OK, true);
} else {
$file = null;
}
self::parseKeyAndInsertValueInArray($files, $part->getName(), $file);
} else {
self::parseKeyAndInsertValueInArray($parsedBody, $part->getName(), $part->getBody());
}
}
}
}
}
return [$files, $parsedBody, $bodyString];
}
/**
* Parse a string key like "files[id_cards][jpg][]" and do $array['files']['id_cards']['jpg'][] = $value.
*
* @param mixed $value
*/
private static function parseKeyAndInsertValueInArray(array &$array, string $key, $value): void
{
if (false === strpos($key, '[')) {
$array[$key] = $value;
return;
}
$parts = explode('[', $key); // files[id_cards][jpg][] => [ 'files', 'id_cards]', 'jpg]', ']' ]
$pointer = &$array;
foreach ($parts as $k => $part) {
if (0 === $k) {
$pointer = &$pointer[$part];
continue;
}
// Skip two special cases:
// [[ in the key produces empty string
// [test : starts with [ but does not end with ]
if ('' === $part || ']' !== substr($part, -1)) {
// Malformed key, we use it "as is"
$array[$key] = $value;
return;
}
$part = substr($part, 0, -1); // The last char is a ] => remove it to have the real key
if ('' === $part) { // [] case
$pointer = &$pointer[];
} else {
$pointer = &$pointer[$part];
}
}
$pointer = $value;
}
}