/// <summary>
/// 触发上传进度事件。
/// </summary>
/// <param name="e"></param>
protected virtual void OnUploadProgress(ProgressEventArgs e)
{
UploadProgressEventHandler handler = this.UploadProgress;
if (handler != null)
{
handler(e);
}
}
/// <summary>
/// 将数据流上传到指定的服务器（HTTP）方式。
/// </summary>
/// <param name="input">上传文件流。</param>
/// <param name="saveName">文件上传后的名称</param>
/// <returns>结果，成功为true,失败返回0</returns>
public bool Upload(Stream input, string saveName)
{
bool result = false;
if (input == null)
{
throw new ArgumentNullException("fs");
}
if (string.IsNullOrEmpty(this.URL))
{
throw new ArgumentNullException("未设置文件上传到的服务器地址(URL)！");
}
string strBoundary = this.BuildBoundary();
byte[] boundaryBytes = this.BuildBoundary(strBoundary);
byte[] postHeaderBytes = this.BuildPostHeader(strBoundary, saveName);
//根据URI创建HttpWebRequest对象。
HttpWebRequest httpReq = (HttpWebRequest)WebRequest.Create(new Uri(this.URL));
httpReq.Method = "POST";
//对发送方数据不使用缓存。
httpReq.AllowWriteStreamBuffering = false;
httpReq.Timeout = this.Timeout;
httpReq.ContentType = "multipart/form-data; boundary=" + strBoundary;
long fileLength = input.Length;
long length = fileLength + postHeaderBytes.Length + boundaryBytes.Length;
httpReq.ContentLength = length;
try
{
byte[] buffer = new byte[4096];
using (BinaryReader reader = new BinaryReader(input))
{
using (Stream post = httpReq.GetRequestStream())
{
DateTime startTime = DateTime.Now;
long offset = 0; int count = 0;
ProgressEventArgs args = null;
//发送请求头部消息。
post.Write(postHeaderBytes, 0, postHeaderBytes.Length);
//上传数据。
while ((count = reader.Read(buffer, 0, buffer.Length)) > 0)
{
post.Write(buffer, 0, count);
offset += count;
args = new ProgressEventArgs();
args.Value = (int)(offset * (int.MaxValue / length));
args.Time = (DateTime.Now - startTime).TotalSeconds;
args.TimeText = string.Format("已用时:{0:F2}秒", args.Time);
if (args.Time > 0.01)
{
args.SpeedText = "平均速度:" + (offset / 1024 / args.Time).ToString("0.00") + "KB/秒";
}
else
{
args.SpeedText = "正在连接...";
}
args.Status = string.Format("{0:F2}%,{1:F2}M/{2:F2}M", (offset * 100.0 / length), (offset / CONST_BYTESTOM), (fileLength / CONST_BYTESTOM));
this.OnUploadProgress(args);
}
//添加尾部时间戳。
post.Write(boundaryBytes, 0, boundaryBytes.Length);
post.Close();
}
reader.Close();
}
//获取服务器响应。
using (WebResponse resp = httpReq.GetResponse())
{
result = this.OnUploadCallback(new CallbackEventArgs(resp.GetResponseStream()));
}
}
finally
{
input.Close();
}
return result;
}