Issues with WWWForm - necessary data rewind wasn't possible

Hello there. Im trying to send data to a php script with WWW and WWWForm. It was working before but at some point it stopped. Suddenly i keep getting a "necessary data rewind wasn't possible" errror. As soon as I comment out all the "AddField"s or not include the form in the WWW call it works perfectly.

Any ideas?

This is the code of my jscript function

Code (csharp):

1. function Start() {
2.  
3. var highscore_url = "http://example.com/script.php";
4. var form = new WWWForm();
5. form.AddField( "var1", "value1" );
6. form.AddField( "var2", "value2");
7.  
8. var www = new WWW( highscore_url, form );
9.  
10. // wait for request to complete
11. yield www;
12.  
13. // and check for errors
14. if (www.error == null)
15. {
16.     // request completed!
17. } else {
18.     // something wrong!
19.     Debug.Log("WWW Error: "+ www.error);
20. }
21.  

and this is the php file

PHP:

<?php
echo json_encode($_POST);
?>

 

So. I have tried to use the exact same code outlined here

http://unity3d.com/support/documentation/ScriptReference/WWWForm.html

for handling form submissions. I am using the same javascript and perl code and I still get this error

Error downloading: necessary data rewind wasn't possible
UnityEngine.MonoBehaviourrint(Object)


can someone please help me. If i cant submit data to my servers then unity becomes completely useless to me.

Sincerely
Rudy

 

Anyone? This is really holding me back

Cheers

 

i figured it out. Im posting the solution for future reference.

in my WWW i was calling "http://myserver.com/myscript.php". The problem was that my server is set to rewrite/re-direct all http://myserver.com calls into http://www.myserver.com. Once I changed the url to contain www. it worked.

Cheers

 

Hi fxjeane / future data rewind problem-hitters,
We just ran into and solved this one -- our PHP script was redirecting ( header("Location:http://....") ). Removing this redirect fixed the problem for us.

Cheers!

 

@jono. You are a LIFESAVER. THANK YOU.

 

To add to this, make sure you attach the script to an empty game object, and not the camera that is loaded as default. Trust me, when I say F*sakes.

echo json_encode($_POST);

nice

 

Many thanks, jono! I had exactly the same problem just now, and your post saved me a whole bunch of time and aggravation.

 

@superme2012, thank you so much for your help, been trying to figure it out for ages, many thanks!

 

@fxjeane thanks this worked for me!

 

I am using this without subdomain means I am using http://128.0.0.255/
i am sharing wrong ip address but i am using like this. so now what solution works for me because this issue occur in some machine or not all the time.