POST request missing values. Handle with C++

[volang]

Im trying to set up a web server that receives and handles a couple of http requests. Unfortunately, I'm stuck on "POST multipart" requests.

I use a html form to send the data to my server. It looks like this:


<form method="POST" action="process_upload.php" enctype="multipart/form-data">

<input type="file" name="user_upload">
<input type="hidden" name="duration">
<input type="hidden" name="test" value="test test">

<button type="submit">Send</button>

</form>



When the form is sent, server receives:

POST /process_upload.php HTTP/1.1
Host: localhost:27015
Connection: keep-alive
Content-Length: 129985
Cache-Control: max-age=0
Origin: http://localhost:27015
Upgrade-Insecure-Requests: 1
Content-Type: multipart/form-data; boundary=----WebKitFormBoundary1JhkT5GiE89P2SBs
User-Agent: Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.97 Safari/537.36
Sec-Fetch-User: ?1
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,/;q=0.8,application/signed-exchange;v=b3
Sec-Fetch-Site: same-origin
Sec-Fetch-Mode: navigate
Referer: http://localhost:27015/index
Accept-Encoding: gzip, deflate, br
Accept-Language: sv-SE,sv;q=0.9,en-US;q=0.8,en;q=0.7
Cookie: PHPSESSID=5motqqf425llf53j5hutj0a0bn

------WebKitFormBoundarymRYGcz75Ct8BV6bh
Content-Disposition: form-data; name="user_upload"; filename="myfile.jpg"
Content-Type: image/jpeg

ÿØÿáɧ¦¨ä"Ö]2üà©–=/D‰…Ë7]^ÞXªë§¬–-zƉx›Ž;?•?üƒî«û³o±Vôì°%²úŸà£õ'õ·òùÿmá±E~ßÝ°Ú׫Ç{NÉò·ƒLûúÌHøûs–ŸsÅ“µï²gÃi½î¢©ÇR»ŽE¼S^]þÏÿ

//End of message here.


As you can see, information about two input fields is missing (duration and test). Full content length is received and no supplementary request is sent.

What is happening and what should I do?


Best Regards
Volang

[coder777]

See this:

Accept-Encoding: gzip, deflate, br

It looks like the content is zipped.