WebClientのサンプル

Test.cs

using UnityEngine;
using UnityEngine.UI;
using System.IO;
using System.Net;
using System.Text;
using System;
using System.Collections;
using System.ComponentModel;

public class Test : MonoBehaviour {
	public InputField InfoInputField;
	const string uri1 = "http://d.hatena.ne.jp/nakamura001/";			// 非SSL
	const string uri2 = "https://unity3d.com/jp/legal/privacy-policy/";	// SSL(DigiCert)
	const string uri3 = "https://www.digicert.com/";	// SSL(DigiCert)
	//const string uri3 = "https://www.verisign.com/";					// SSL(VeriSign)
	string addMsg = "";

	void Download(string uri) {
		InfoInputField.text = string.Format("URI:{0}\n", uri);
		WebClient client = new WebClient();
		client.DownloadFileAsync (new Uri(uri), Application.persistentDataPath + "/test");
		client.DownloadFileCompleted += DLComplete;
	}

	void DLComplete(object sender, AsyncCompletedEventArgs e) {
		if (e.Error == null) {
			addMsg += "DL Success!!\n";
		} else {
			addMsg += string.Format("Error: {0}\n", e.Error);
		}
		addMsg += sender.ToString ();
		WebClient client = sender as WebClient;
		client.DownloadFileCompleted -= DLComplete;
	}

	void Update() {
		if (!string.IsNullOrEmpty (addMsg)) {
			InfoInputField.text += addMsg;
			addMsg = "";
		}
	}
	public void Test1() {
		Download (uri1);
	}

	public void Test2() {
		Download (uri2);
	}

	public void Test3() {
		Download (uri3);
	}
}