我正在使用 HttpWebRequest 将文件上传到某个服务器，现在的问题是我遇到了速度问题。
我无法获得与浏览器（Mozilla Firefox）相同的上传速度，我获得的速度是我从浏览器获得的速度的 1/5。
这是我的 HttpWebRequest 对象的设置
//headers is a NameValueCollection type object,
//Method is a struct { GET, POST, HEAD }
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(uri);
request.UserAgent = headers["User-Agent"];
request.KeepAlive = false;
request.Accept = headers["Accept"];
request.AllowAutoRedirect = AllowRedirect;
request.Headers.Add(HttpRequestHeader.AcceptLanguage, "en-US,en;q=0.5");
request.Method = Method.ToString();
request.AllowWriteStreamBuffering = false;
request.ReadWriteTimeout = 60000;
我一直启用的一些全局选项
ServicePointManager.Expect100Continue = false;
ServicePointManager.DefaultConnectionLimit = 200;
ServicePointManager.MaxServicePointIdleTime = 2000;
ServicePointManager.MaxServicePoints = 1000;
ServicePointManager.SetTcpKeepAlive(false, 0, 0);
我如何以块的形式发送文件...
if (PostMethod == PostType.MultiPart && uploadFiles.Count > 0)
{
for (int i = 0; i < uploadFiles.Count; i++)
{
string fileParam = uploadFiles.GetKey(i);
string tmpFilename = uploadFiles.Get(i);
string tmpData =
string.Format(
"--{0}\r\nContent-Disposition: form-data; name=\"{1}\"; filename=\"{2}\"\r\nContent-Type: {3}\r\n\r\n", boundary, fileParam, Path.GetFileName(tmpFilename), MimeType.GetMimeByExtension(Path.GetExtension(tmpFilename)));
byte[] tmpBytes = Encoding.Default.GetBytes(tmpData);
writer.Write(tmpBytes, 0, tmpBytes.Length);
bSent += tmpBytes.Length;
arg.Progress = (int)(bSent * 100 / totalBytes);
arg.Speed = (bSent / sw.Elapsed.TotalSeconds);
OnProgress(arg);
//write the file
int fileBytesRead;
FileStream fileStream = File.Open(tmpFilename, FileMode.Open, FileAccess.Read, FileShare.Read);
// buffer size = 8192
while ((fileBytesRead = fileStream.Read(buffer, 0, BUFFER_SIZE)) > 0)
{
writer.Write(buffer, 0, fileBytesRead);
bSent += fileBytesRead;
int timeNow = Environment.TickCount;
if (timeNow - lastTime >= 500)
{
lastTime = timeNow;
arg.Progress = (int)(bSent * 100 / totalBytes);
arg.Speed = (bSent / sw.Elapsed.TotalSeconds);
OnProgress(arg);
}
}
tmpBytes = Encoding.Default.GetBytes("\r\n");
writer.Write(tmpBytes, 0, tmpBytes.Length);
bSent += tmpBytes.Length;
arg.Progress = (int)(bSent * 100 / totalBytes);
arg.Speed = (bSent / sw.Elapsed.TotalSeconds);
OnProgress(arg);
}
}
我很乐意达到浏览器上传速度的 75%。