Unity Get Post Methods of Getting/Posting data to server written in C#

RequestService.cs

using UnityEngine;
using System.Collections;

public class RequestService : MonoBehaviour
{
	public string GetUrl = "http://hmkcode.appspot.com/rest/controller/get.json";
	public string PostUrl = "http://androidexample.com/media/webservice/httppost.php";

	public string textRetrieved;

	void RequestGet ()
	{
		WWW www = new WWW (GetUrl);
		Debug.Log ("Process Get Request ... ");
		StartCoroutine (WaitForGetRequest (www));
	}

	void RequestPost ()
	{
		WWWForm form = new WWWForm();
		form.AddField("name", "Noor Ali Butt");
		form.AddField("email", "nooralibutt@gmail.com");
		form.AddField("user", "nooralibutt");
		form.AddField("pass", "test123");
		WWW www = new WWW(PostUrl, form);
		Debug.Log ("Process Post Request ... ");
		StartCoroutine(WaitForPostRequest(www));
	}

	IEnumerator WaitForGetRequest (WWW www)
	{
		yield return www;
		// check for errors
		if (www.error == null) {
			string text = www.text;
			textRetrieved = text;
			Debug.Log ("WWW Ok!: \n" + text);
		} else {
			Debug.Log ("WWW Error: " + www.error);
		}    
	}

	IEnumerator WaitForPostRequest (WWW www)
	{
		yield return www;
		// check for errors
		if (www.error == null) {
			string text = www.text;
			textRetrieved = text;
			Debug.Log ("WWW Ok!: " + www.text);
		} else {
			Debug.Log ("WWW Error: " + www.error);
		}    
	}

	void OnGUI ()
	{
		// Make a background box
		GUI.Box (new Rect (10, 10, 200, 200), "Services Test");
		
		// Make the first button. If it is pressed, Application.Loadlevel (1) will be executed
		if (GUI.Button (new Rect (20, 40, 120, 30), "Request Get")) {
			RequestGet ();
		}
		
		// Make the second button.
		if (GUI.Button (new Rect (20, 70, 120, 30), "Request Post")) {
			RequestPost ();
		}

		GUI.Label(new Rect(Screen.width/2, Screen.height/2, 200, 200), textRetrieved);
	}
}