UnityWebRequest sending blank data to HTTP

This is a sample of what I'm doing to send data to my host, however, I think it's sending blank data. For example in the "serverKeycode", I'm sending "example", but the server is receiving just "".

C#
WWWForm form = new WWWForm();
form.AddField("serverKeycode", "example");
form.AddField("username", authUsername.text);
form.AddField("password", authPassword.text);

UnityWebRequest www = UnityWebRequest.Post("http://example.com/authenticate.php", form);
yield return www.SendWebRequest();

PHP
header("Access-Control-Allow-Credentials: true");
header('Access-Control-Allow-Origin: *');
header('Access-Control-Allow-Methods: POST, GET, OPTIONS');
header('Access-Control-Allow-Headers: Accept, X-Access-Token, X-Application-Name, X-Request-Sent-Time');

$server_key = "example";
$server_auth = filter_input(INPUT_POST, 'serverKeycode');
if ($server_auth == $server_key)
{

// do something​

}
else
{

$myJSON->returnType = 2
$myJSON->message = "Key: " . $server_auth; // just for checking the key​

}

When returning a JSON from the PHP and printing the $message in Unity, it prints nothing.

So does it mean that Unity is not sending the data?

It used to work on my old webhost, also, if I send the POST Request through Postman, everything works fine. Do I need to allow something in the firewall?

 

Thanks! That solved the problem.

 

I'm having the same issue, even after setting chunkedTransfer to false. I've tried by passing a
List<IMultipartFormSection>, a WWWForm, and regular strings to the Post method, but no luck. The body is always emtpy.

Code (CSharp):

1.      
2.         WWWForm form = new WWWForm();
3.         form.AddField("username_login", username);
4.         form.AddField("password_login", password);
5.         form.AddField("csrfmiddlewaretoken", theToken);
6.  
7.         www = UnityWebRequest.Post("https://synk.cloud/login/", form);
8.  
9.         www.SetRequestHeader("referer", "https://synk.cloud/login/");
10.         www.SetRequestHeader("Content-Type", "form-data");
11.         www.SetRequestHeader("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:58.0) Gecko/20100101 Firefox/58.0");
12.         www.SetRequestHeader("X-CSRFToken", theToken);
13.         www.SetRequestHeader("csrftoken", theToken);
14.         www.SetRequestHeader("cookie", theTokenFull);
15.  
16.         www.chunkedTransfer = false;
17.  
18.         yield return www.SendWebRequest();
19.  

I would appreciate any help.

 

Thanks for the reply. Setting useHttpContinue to false didn't solve the issue, though. The POST request body is still not getting populated.

 

Sure, I will. Are there any known workarounds for this problem?

 

Thanks, I reported the issue. Case number 1013205. Here is the link: https://fogbugz.unity3d.com/default.asp?1013205_23j82950utpd1hv2

 

I am experiencing this issue too, but I'm using 2017.1.1f1

 

I am using Unity version 2018.1.0f2 and still facing this issue

 

Still having this issue on 2019.2.0f1

 

This might help someone:

I tried all of answers from here and StackOverflow and nothing worked, but I noticed that Unity adds a Request Header :

Code (CSharp):

1. upgrade-insecure-requests  1

So I upgraded my POST url to https://

It still didn't work with

Code (CSharp):

1. MultipartFormData

, but it started working with

Code (CSharp):

1. WWWForm form = new WWWForm();

 

2019.3.14f1 same problem.
Any progress on that?

 

WWWForm form = new WWWForm();
form.AddField("blah", e);
form.AddField("blah2", f);
UnityWebRequest www = UnityWebRequest.Post(url, form);
yield return www.SendWebRequest();

works for me, no problems.
make sure you are using UnityEngine.Networking; too

 

I'm having the same issue, and working with the same WWWForm, yep, I'm using the UnityEngine.Network, but still the fields empty. Any progress with that issue?

 

post your code.

 

2021.3.16f1 still have the issue!

 

As always, the process for debugging network stuff is best handled OUTSIDE of Unity:

Networking, UnityWebRequest, WWW, Postman, curl, WebAPI, etc:

https://forum.unity.com/threads/using-unity-for-subscription-lists.1070663/#post-6910289

https://forum.unity.com/threads/unity-web-request-acting-stupid.1096396/#post-7060150

And setting up a proxy can be very helpful too, in order to compare traffic:

https://support.unity.com/hc/en-us/articles/115002917683-Using-Charles-Proxy-with-Unity