read multipart/form-data request PHP7 - php

Question

How to get the raw HTTP request from a multipart/form-data request?
The request is not written to test.log.. Only Response: is saved?
The client can upload files etc. and I need to check if the user gzip the binary data parts.. If not I need to throw an error
request
$boundary = 'jlasdifj439';
$field1 = json_encode(['test' => 123]);
$body = '--'.$boundary."\r\n"
.'Content-Disposition: form-data; name="json"'."\r\n"
.'Content-Type: application/json'."\r\n"
.'Content-Length: '.strlen($field1)."\r\n\r\n"
.$field1."\r\n"
.'--'.$boundary.'--';
$socket = curl_init();
curl_setopt_array($socket, [
CURLOPT_POST => true,
CURLOPT_RETURNTRANSFER => true,
CURLOPT_VERBOSE => true,
CURLOPT_ENCODING => '',
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_2_0,
]);
curl_setopt($socket, CURLOPT_URL, 'https://my-url');
curl_setopt($socket, CURLOPT_HTTPHEADER, [
'Content-Type: multipart/form-data; boundary='.$boundary,
]);
curl_setopt($socket, CURLOPT_POSTFIELDS, $body);
if(!$response = curl_exec($socket)){
echo "ERROR!";
}
echo $response;
response
$body = file_get_contents('php://input');
file_put_contents('/var/www/test.log', "Response:\n".$body);
test.log
Response:
curl verbose
* Hostname was NOT found in DNS cache
* Trying xxx.xxx.xxx.xxx...
* Connected to test.com (xxx.xxx.xxx.xxx) port 443 (#0)
* successfully set certificate verify locations:
* CAfile: none
CApath: /etc/ssl/certs
* SSL connection using TLSv1.2 / ECDHE-RSA-AES256-GCM-SHA384
* Server certificate:
* subject: CN=*xxxxx
* start date: 2017-10-02 00:00:00 GMT
* expire date: 2018-12-01 23:59:59 GMT
* subjectAltName: test.com matched
* issuer: C=US; O=thawte, Inc.; OU=Domain Validated SSL; CN=thawte DV SSL SHA256 CA
* SSL certificate verify ok.
> POST / HTTP/1.1
Host: xxxxx
Accept: */*
Accept-Encoding: deflate, gzip
Content-Type: multipart/form-data; boundary=jlasdifj439
Content-Length: 143
* upload completely sent off: 143 out of 143 bytes
< HTTP/1.1 200 OK
* Server nginx is not blacklisted
< Server: nginx
< Date: Sun, 10 Jun 2018 20:49:43 GMT
< Content-Type: application/json
< Transfer-Encoding: chunked
< Connection: keep-alive
< content-encoding: gzip
<
* Connection #0 to host xxxxx left intact