Unity3D WWW Post data async - unity3d

Question

I want to post a JSON to a website using the WWW class, But I get this answer from the server: "Synchronization problem.". Is there a way to change from sync to async? Thank You

Answer 1

You can run your WWW job in a coroutine (WWW supports this well):
using UnityEngine;
public class PostJSON : MonoBehaviour {
void Start () {
string url = "http://your_url_endpoint";
WWWForm form = new WWWForm();
Hashtable headers = form.headers;
headers["Content-Type"] = "application/json";
Hashtable data = new Hashtable();
data["message"] = "a sample message sent to service as json";
string json = JSON.JsonEncode(data);
byte[] bytes = Encoding.UTF8.GetBytes(json);
WWW www = new WWW(url, bytes, headers);
StartCoroutine(WaitForRequest(www));
}
IEnumerator WaitForRequest(WWW www)
{
yield return www
// check for errors
if (www.error == null)
{
Debug.Log("WWW Ok!: " + www.data);
} else {
Debug.Log("WWW Error: "+ www.error);
}
}
}
Here you have a running project which I use to talk to a json based REST service called KiiCloud:
http://blog.kii.com/?p=2939
HTH

Answer 2

The answer from German was very helpful, but I made some tweaks so that it'll compile and run (with sample serialization / deserialization bits).
Just pass in the BaseUrl you want to post to, i.e.
http://www.domain.com/somecontroller/someaction or whatever.
using System;
using System.Text;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
[Serializable]
public class Person
{
public string Name;
}
[Serializable]
public class Response
{
public string SomeValue;
}
public class PostJSON : MonoBehaviour
{
public string BaseUrl;
private WWWForm form;
private Dictionary<string, string> headers = null;
void Start ()
{
var basUrlNotSpecified = string.IsNullOrEmpty(BaseUrl);
if(basUrlNotSpecified)
{
Debug.LogWarning("BaseUrl value not specified. Post abandoned.");
return;
}
form = new WWWForm();
headers = form.headers;
headers["Content-Type"] = "application/json";
headers["Accept"] = "application/json";
var person = new Person
{
Name = "Iulian Palade"
};
var json = JsonUtility.ToJson(person);
byte[] bytes = Encoding.UTF8.GetBytes(json);
WWW www = new WWW(BaseUrl, bytes, headers);
StartCoroutine(WaitForRequest(www));
}
IEnumerator WaitForRequest(WWW www)
{
yield return www;
if (www.error == null)
{
Debug.Log("WWW Ok!: " + www.text);
var response = JsonUtility.FromJson<Response>(www.text);
Debug.Log(response.SomeValue);
}
else
{
Debug.Log("WWW Error: "+ www.error);
}
}
}