1、代码实现

using UnityEngine;

using System.Collections;

using System;

using System.Text;

using System.Net;

using System.IO;

internal class WebReqState

{

public byte[] Buffer;

public FileStream fs;

public const int BufferSize = 1024;

public Stream OrginalStream;

public HttpWebResponse WebResponse;

public WebReqState(string path)

{

Buffer = new byte[1024];

fs = new FileStream(path, FileMode.Create);

}

}

public class HttpHelper

{

string path = null;

string assetName;

public HttpHelper(string path)

{

this.path = path;

}

public void AsyDownLoad(string url)

{

Debug.Log("url is:+"+url);

assetName = url.Split('/')[4];

Debug.Log("assetName is :+"+assetName);

HttpWebRequest httpRequest = WebRequest.Create(url) as HttpWebRequest;

httpRequest.BeginGetResponse(new AsyncCallback(ResponseCallback), httpRequest);

}

void ResponseCallback(IAsyncResult ar)

{

HttpWebRequest req = ar.AsyncState as HttpWebRequest;

if (req == null) return;

HttpWebResponse response = req.EndGetResponse(ar) as HttpWebResponse;

if (response.StatusCode != HttpStatusCode.OK)

{

response.Close();

return;

}

Debug.Log(path + "/" + assetName);

WebReqState st = new WebReqState(path + "/" + assetName);

st.WebResponse = response;

Stream responseStream = response.GetResponseStream();

st.OrginalStream = responseStream;

responseStream.BeginRead(st.Buffer, 0, WebReqState.BufferSize, new AsyncCallback(ReadDataCallback), st);

}

void ReadDataCallback(IAsyncResult ar)

{

WebReqState rs = ar.AsyncState as WebReqState;

int read = rs.OrginalStream.EndRead(ar);

if (read > 0)

{

rs.fs.Write(rs.Buffer, 0, read);

rs.fs.Flush();

rs.OrginalStream.BeginRead(rs.Buffer, 0, WebReqState.BufferSize, new AsyncCallback(ReadDataCallback), rs);

}

else

{

rs.fs.Close();

rs.OrginalStream.Close();

rs.WebResponse.Close();

Debug.Log(assetName + ":::: success");

}

}

}

 

 

2、从服务器上下载资源 到本地上（PC端经测试成功）

void OnGUI()

{

string[] str = new string[2] { "Sphere", "Cube" };

//下载

if (GUI.Button(new Rect(10, 10, 200, 45), "下载"))

{

string rootPath = Application.persistentDataPath;//android上保存到 /storage/sdcard0/Android/data/包名(例如：com.example.test)/files

for (int i = 0; i < str.Length; i++) //str是string型数组，存放部分assetbundle名字

{

Thread thread = new Thread(new ParameterizedThreadStart(DownAsset)); //ParameterizedThreadStart 多线程传参

thread.Start(rootPath + "|" + str[i]); //只能带一个object参数 所以使用字符串拼接

}

}

 

void DownAsset(System.Object file)

{

string[] fileName = file.ToString().Split('|');

Debug.Log("文件名000000是：+" + fileName[0]);

Debug.Log("文件名是1111：+" + fileName[1]);

HttpHelper help = new HttpHelper(fileName[0]);

help.AsyDownLoad("http://192.168.0.98/MyItems/Test/" + fileName[1] + ".assetbundle");//注意在手机上测试 该对Ip地址

Debug.Log("下载的地址是：+" + "http://192.168.0.98/MyItems/Test/" + fileName[1] + ".assetbundle");

}