1 public static bool DownRemoteFile(string url, string filepath)
2 {
3 ServicePointManager.DefaultConnectionLimit = 200;
4 try
5 {
6 //对远程文件发送一个请求
7 HttpWebRequest webReq = HttpWebRequest.CreateHttp(url);
8 webReq.ServicePoint.Expect100Continue = false;
9 webReq.ServicePoint.UseNagleAlgorithm = false;
10 webReq.ServicePoint.ConnectionLimit = 65500;
11 webReq.AllowWriteStreamBuffering = false; webReq.Proxy = null;
12
13 //接收远程WEB服务器发回的响应
14 WebResponse webRes = webReq.GetResponse();
15
16
17
18 MemoryStream ms = new MemoryStream();
19 webRes.GetResponseStream().CopyTo(ms);
20 //获取文件长度
21 long fileLength = webRes.ContentLength;
22 byte[] bufferbyte = ms.ToArray();
23
24
25 //判断存储路径每一个节点是否存在
26 if (!System.IO.File.Exists(filepath))
27 {
28 string[] dirArray = filepath.Split('\');
29 string temp = string.Empty;
30 for (int i = 0; i < dirArray.Length - 1; i++)
31 {
32 temp += dirArray[i].Trim() + "\";
33 if (!Directory.Exists(temp))
34 Directory.CreateDirectory(temp);
35 }
36 }
37 //创建一个文件流，将处理的文件流写入磁盘
38 FileStream fs = new FileStream(filepath, FileMode.OpenOrCreate, FileAccess.ReadWrite);
39 fs.Write(bufferbyte, 0, bufferbyte.Length);
40 ms.Close();
41 fs.Close();
42
43 if (!System.IO.File.Exists(filepath))
44 {
45 return false;
46 }
47 else
48 {
49 return true;
50 }
51 }
52 catch (Exception ex)
53 {
55 return false;
56 }
57 }