public async Task<float> measureUploadSpeed(Server server, int size = 1024*482){
Contract.Requires(server != null);
Contract.Requires(size >= 0);
var prefix = new[]{
(byte) '&',
(byte) 'c',
(byte) 'o',
(byte) 'n',
(byte) 't',
(byte) 'e',
(byte) 'n',
(byte) 't',
(byte) '0',
(byte) '=',
};
stage = Stage.UPLOAD;
var req = HttpWebRequest.Create(new Uri(server.uri, "upload.php")) as HttpWebRequest;
req.Method = "POST";
req.ContentType = "application/x-www-form-urlencoded";
req.CachePolicy = new System.Net.Cache.RequestCachePolicy(System.Net.Cache.RequestCacheLevel.NoCacheNoStore);
req.ContentLength = countOfPieces*(defaultSize + prefix.Length);
req.KeepAlive = true;
req.Credentials = CredentialCache.DefaultCredentials;
req.Proxy = hch.Proxy;
emitProgressEvent(0);
using (var str = req.GetRequestStream()) {
using (var ums = new RangedRandomBytesStream(defaultSize, (byte)'A', (byte)'z'))
{
int j = 0;
EventedStream.dataLoadListener evtListener = (o, bytes) => emitProgressEvent(100 * (j + bytes / defaultSize) / countOfPieces);
ums.onLoading += evtListener;
sw.Restart();
for (; j < countOfPieces; j++)
{
prefix[8] = (byte)('0' + j);
await str.WriteAsync(prefix, 0, prefix.Length);
await str.FlushAsync();
await ums.CopyToAsync(str);
ums.Position = 0;
await str.FlushAsync();
}
sw.Stop();
ums.onLoading -= evtListener;
}
}
await req.GetResponseAsync().ContinueWith(t => t.Result.GetResponseStream().Close());
float speed = (float) (req.ContentLength/(sw.Elapsed.TotalSeconds));
emitProgressEvent(100);
emitMeasuredEvent(speed);
return speed;
}
public async Task RangedRandomToDevNull()
{
using (Stream cs = new RangedRandomBytesStream(defCount, 0xAD, 0xEF), dns = new DevNullStream())
await dns.CopyToAsync(cs);
}