Hi,

By the look of things I gather that there is a bug in unity on WWWForm post. is that right?

For the last 3 days, I have been trying to figure out why i can't receive FORM POST data when using Firefox and Chrome but Safari works perfectly. I have tried everything I could think of and I don't know what else I can test.

I'm currently using Unity 5.1.1p2 and WebGL build.

Similar here.
I send a Post Request from Unity and read it with a Java Server but got no Request Body Data in Unity 5.1.1f1 (64bit).
Searched for any Error in the Server for hours.

I've changed to Unity 5 in the dev process. With Unity 4 the Post Request was successfully send and read by the same Server.

It's still an issue in 5.0.1f1

Was this issue fixed with an update?

Unity developers -> please fix this ASAP

same problem:

Connection: keep-alive
Content-length: 218

Content-Length: 85
Content-Type: application/x-www-form-urlencoded
X-Unity-Version: 5.0.1f1
hash: e0f6741b1c9273b0e5513cf50e6d4092

data="Hello world"

Unity, I love you but at this point in the game, you should be embarrassed to have bugs in your HTTP implementation. Getting this fixed should be treated as a fire drill.

If it helps, the problem seems to be that WWW is generating too copies of the Content-Length header with a space in between, e.g.

POST /accounts HTTP/1.1
...
Content-length: 147

Content-Length: 53
Content-Type: application/x-www-form-urlencoded
X-Unity-Version: 5.0.1f1

name=foo&value=bar

when will this bug fixe?

Workaround:

Add one binary field to your WWWForm:
wwwForm.AddBinaryData("binary", new byte[1]);

Now everything will work.

While the bug is fixed, manually fill the $_POST array work for me:

<?php
if (empty($_POST))
{
$data = file_get_contents('php://input');
$data = substr($data,strrpos($data,"\n"));
$vars = explode("&",$data);
$_POST = array();
for ($i = 0; $i < count($vars); $i++)
{
list($key, $value) = split("=", $vars[$i],2);
if(strlen(trim($key))>0)
{
$key=preg_replace('/[\n\r]/', '', $key);
$value=preg_replace('/[\n\r]/', '', $value);
$_POST[$key]=$value;
}
}
}
?>

I had this same issue since U4... Worked in Chrome and Safari but not FF or IE... so I switched my code to use GET instead of POST and everything worked just fine... Instead of saying
for( int i = 0;i < array_length; i++) myform.AddField(field_name[i], field_value[i]);
WWW w = new WWW(myurl, myform);

I just do this instead:
for( int i = 0; i < array_length; i++) get_string += string.Format("&{0}={1}",field_name[i], field_value[i]);
WWW w = new WWW myurl + "?" + get_string.SubString(1));

...and that was that. Works on all platforms.