Unity技术分享之Unity实现网络多线程上传数据,支持断点续传

在现在的网络游戏中,网络层面的交互是不可或缺的模块了, 其中本地数据上传至服务器的需求几乎是游戏的基本配置了 , 最近在用Unity做一款应用(不是游戏),其中涉及到数据上传 , 在根据C#语言进行方法封装, 发现还挺好用 , 代码不多 ,这里给大家分享一下.

• 支持断点续传开关判断
• 本地数据校验

---

核心代码 ↓

using System.Threading;
using System.IO;
using System.Net;
using UnityEngine;

/// <summary>
/// 多线程可断点下载( 需服务器支持 )
/// </summary>
public class Download
{
	public const int TIMEOUT = 100000;
	public float progress { get; private set; }
	public bool isDone { get; private set; }
	private bool isstop;
	public bool isStop {
		get { return isstop; }
		set { if (value) { thread.Abort(); thread = null; } isstop = value; }
	}
	private Thread thread;

	/// <summary>
	/// Initializes a new instance of the <see cref="T:Download"/> class.
	/// </summary>
	/// <param name="url">URL.</param>
	/// <param name="desDir">DES dir.</param>
	/// <param name="isSupportResume">If set to <c>true</c> 支持断点续传.</param>
	/// <param name="callback">Callback.</param>
	public Download(string url, string desDir, bool isSupportResume, System.Action callback)
	{
		thread = new Thread(new ThreadStart(delegate {
			using (FileStream fs = new FileStream(desDir, isSupportResume ? FileMode.OpenOrCreate : FileMode.Create)) {
				HttpWebRequest req = HttpWebRequest.Create(url) as HttpWebRequest;
				req.Method = "HEAD";
				HttpWebResponse resp = req.GetResponse() as HttpWebResponse;
				var len = resp.ContentLength;
				long fileLen = fs.Length;
				if (fs.Length < len) {
					fs.Seek(fs.Length, SeekOrigin.Begin);
					HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
					request.Timeout = TIMEOUT;
					request.Method = "GET";
					request.AddRange((int)fs.Length);
					var response = request.GetResponse() as HttpWebResponse;
					using (Stream stream = response.GetResponseStream()) {
						byte[] buffer = new byte[1024];
						int lenth = stream.Read(buffer, 0, buffer.Length);
						while (lenth > 0) {
							if (isStop) break;
							fs.Write(buffer, 0, lenth);
							fileLen += lenth;
							//todo 计算进度
							progress = (float)fileLen / len;
							lenth = stream.Read(buffer, 0, buffer.Length);
							if (lenth < 1024) {
								Debug.Log(lenth);
							}
						}
						Debug.Log(">>>>>>>>>");
					}
				} else {
					progress = 1;
				}
			}
			if (progress == 1 && callback != null) {
				callback();
			}
		}));
		thread.Start();
	}
}

使用方法 ↓

using UnityEngine;
using UnityEngine.UI;

/// <summary>
/// Test.
/// </summary>
public class Test : MonoBehaviour
{
	string url = @"http://attachments.gfan.com/forum/201508/17/1046319ijbj4whiw9itrmm.png";

	string filePath = null;
    [SerializeField]
	public Slider slider;
	Download down = null;

	void Start()
	{
		filePath = @Application.dataPath + "/123.png";
		down = new Download(url, filePath, true, () => print("下载完毕"));
	}

	void Update()
	{
		slider.value = down.progress;
	}

	private void OnDestroy()
	{
		if (down != null) {
			down.isStop = true;
		}
	}
}