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C# simple http download sample
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using System; | |
using System.Collections.Generic; | |
using System.Linq; | |
using System.Text; | |
using System.Threading.Tasks; | |
using System.Net.Sockets; | |
using System.Net; | |
namespace ConsoleApplication1 | |
{ | |
class Program | |
{ | |
//d41d8cd98f0b24e980998ecf8427e | |
static string B2S(byte[] bs) | |
{ | |
var sb = new StringBuilder((int)(bs.Length * .5f)); | |
foreach (var c in bs) | |
{ | |
sb.AppendFormat("{0:x}", c); | |
} | |
return sb.ToString(); | |
} | |
static void Main(string[] args) | |
{ | |
var buf = new byte[1024 * 512]; | |
var url = new Uri("http://foodatcoa.sinaapp.com/WebPlayer/bundle/data.asset"); | |
var req = (HttpWebRequest)WebRequest.Create(url);// HttpWebRequest.CreateHttp(url); | |
var md5 = System.Security.Cryptography.MD5.Create(); | |
req.Method = WebRequestMethods.Http.Get; | |
req.ContentType = "application/octet-stream"; | |
Console.WriteLine("wait for response"); | |
var rsp = req.GetResponse(); | |
if (rsp.ContentLength > 0) | |
{ | |
var wfs = System.IO.File.Create("download.asset"); | |
var stream = rsp.GetResponseStream(); | |
var total = 0L; | |
Console.WriteLine("start: {0}", rsp.ContentLength); | |
while (total < rsp.ContentLength) | |
{ | |
var step = stream.Read(buf, 0, buf.Length); | |
if (step > 0) | |
{ | |
total += step; | |
wfs.Write(buf, 0, step); | |
Console.WriteLine("read {0} bytes ({1})", total, 100f * (float)total / rsp.ContentLength); | |
} | |
} | |
Console.WriteLine("completed."); | |
stream.Close(); | |
stream.Dispose(); | |
var hash = B2S(md5.ComputeHash(wfs)); | |
Console.WriteLine("hash: {0}", hash); | |
if ("d41d8cd98f0b24e980998ecf8427e" != hash) | |
{ | |
Console.WriteLine("ERROR"); | |
} | |
wfs.Close(); | |
wfs.Dispose(); | |
} | |
else | |
{ | |
Console.WriteLine("failed. {0} {1}", rsp.ContentType, rsp.ContentLength); | |
} | |
rsp.Close(); | |
rsp.Dispose(); | |
Console.WriteLine("end"); | |
Console.ReadKey(true); | |
} | |
} | |
} |
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