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关于大文件上传里的ReadEntityBody方法问题

离子漂浮物 2009-12-05 06:36:55
作一个大文件上传进度条功能时遇到一个奇怪的问题。


while ((hwRequest.IsClientConnected() && !hwRequest.IsEntireEntityBodyIsPreloaded()) && (dstOffset < contentLength))
{
if ((contentLength - dstOffset) > count) { count = ((int)contentLength) - dstOffset; }
preloadedEntityBody = new byte[count];
int num2 = hwRequest.ReadEntityBody(preloadedEntityBody, count);/*问题出在这里*/
Buffer.BlockCopy(preloadedEntityBody, 0, dst, dstOffset, num2);
dstOffset += num2;
progressbarData.Msg = "Uping";
progressbarData.Current = dstOffset;
progressbarData.Model = eProgressbarModel.Uping;
progressbarData.Save();
}


运行到ReadEntityBody那句时就跳出循环,激活了EndRequest,不管怎么试都是一样的结果。
有没人知道使用ReadEntityBody时需要什么条件吗?

补充一下,在这之前我只请求了一个application.Context.Request.QueryString["blip"]; ,希望有人能提点一下。
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悔说话的哑巴 2009年12月06日
HttpApplication application1 = sender as HttpApplication;
HttpWorkerRequest request1 = (HttpWorkerRequest) ((IServiceProvider) HttpContext.Current).GetService(typeof(HttpWorkerRequest));
try
{
if (application1.Context.Request.ContentType.IndexOf("multipart/form-data") <= -1)
{
return;
}
//Check The HasEntityBody
if (!request1.HasEntityBody())
{
return;
}

int num1 = 0;
TimeSpan span1 = DateTime.Now.Subtract(this.beginTime);

string text1 = application1.Context.Request.ContentType.ToLower();

byte[] buffer1 = Encoding.ASCII.GetBytes(("\r\n--" + text1.Substring(text1.IndexOf("boundary=") + 9)).ToCharArray());
int num2 = Convert.ToInt32(request1.GetKnownRequestHeader(11));
Progress progress1 = new Progress();

application1.Context.Items.Add("FileList", new Hashtable());

byte[] buffer2 = request1.GetPreloadedEntityBody();
num1 += buffer2.Length;

string text2 = this.AnalysePreloadedEntityBody(buffer2, "UploadGUID");
if (text2 != string.Empty)
{
application1.Context.Items.Add("LionSky_UpLoadModule_UploadGUID", text2);
}
bool flag1 = true;
if ((num2 > this.UpLoadFileLength()) && ((0 > span1.TotalHours) || (span1.TotalHours > 3)))
{
flag1 = false;
}
if ((0 > span1.TotalHours) || (span1.TotalHours > 3))
{
flag1 = false;
}
string text3 = this.AnalysePreloadedEntityBody(buffer2, "UploadFolder");
ArrayList list1 = new ArrayList();
RequestStream stream1 = new RequestStream(buffer2, buffer1, null, RequestStream.FileStatus.Close, RequestStream.ReadStatus.NoRead, text3, flag1, application1.Context, string.Empty);
list1.AddRange(stream1.ReadBody);
if (text2 != string.Empty)
{
progress1.FileLength = num2;
progress1.ReceivedLength = num1;
progress1.FileName = stream1.OriginalFileName;
progress1.FileCount = ((Hashtable) application1.Context.Items["FileList"]).Count;
application1.Application["_UploadGUID_" + text2] = progress1;
}
if (!request1.IsEntireEntityBodyIsPreloaded())
{
byte[] buffer4;
ArrayList list2;
int num3 = 204800;
byte[] buffer3 = new byte[num3];
while ((num2 - num1) >= num3)
{
if (!application1.Context.Response.IsClientConnected)
{
this.ClearApplication(application1);
}
num3 = request1.ReadEntityBody(buffer3, buffer3.Length);
num1 += num3;
list2 = stream1.ContentBody;
if (list2.Count > 0)
{
buffer4 = new byte[list2.Count + buffer3.Length];
list2.CopyTo(buffer4, 0);
buffer3.CopyTo(buffer4, list2.Count);
stream1 = new RequestStream(buffer4, buffer1, stream1.FileStream, stream1.FStatus, stream1.RStatus, text3, flag1, application1.Context, stream1.OriginalFileName);
}
else
{
stream1 = new RequestStream(buffer3, buffer1, stream1.FileStream, stream1.FStatus, stream1.RStatus, text3, flag1, application1.Context, stream1.OriginalFileName);
}
list1.AddRange(stream1.ReadBody);
if (text2 != string.Empty)
{
progress1.ReceivedLength = num1;
progress1.FileName = stream1.OriginalFileName;
progress1.FileCount = ((Hashtable) application1.Context.Items["FileList"]).Count;
application1.Application["_UploadGUID_" + text2] = progress1;
}
}
buffer3 = new byte[num2 - num1];
if (!application1.Context.Response.IsClientConnected && (stream1.FStatus == RequestStream.FileStatus.Open))
{
this.ClearApplication(application1);
}
num3 = request1.ReadEntityBody(buffer3, buffer3.Length);
list2 = stream1.ContentBody;
if (list2.Count > 0)
{
buffer4 = new byte[list2.Count + buffer3.Length];
list2.CopyTo(buffer4, 0);
buffer3.CopyTo(buffer4, list2.Count);
stream1 = new RequestStream(buffer4, buffer1, stream1.FileStream, stream1.FStatus, stream1.RStatus, text3, flag1, application1.Context, stream1.OriginalFileName);
}
else
{
stream1 = new RequestStream(buffer3, buffer1, stream1.FileStream, stream1.FStatus, stream1.RStatus, text3, flag1, application1.Context, stream1.OriginalFileName);
}
list1.AddRange(stream1.ReadBody);
if (text2 != string.Empty)
{
progress1.ReceivedLength = num1 + buffer3.Length;
progress1.FileName = stream1.OriginalFileName;
progress1.FileCount = ((Hashtable) application1.Context.Items["FileList"]).Count;
if (flag1)
{
progress1.UploadStatus = Progress.UploadStatusEnum.Uploaded;
}
else
{
application1.Application.Remove("_UploadGUID_" + text2);
}
}
}
byte[] buffer5 = new byte[list1.Count];
list1.CopyTo(buffer5);
this.PopulateRequestData(request1, buffer5);
}
catch (Exception exception1)
{
this.ClearApplication(application1);
throw exception1;
}

借鉴以下,楼住自己慢慢看吧
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happyboyxq 2009年12月06日
路过学习
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gongsun 2009年12月06日
...
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wuyq11 2009年12月05日
HttpWorkerRequest.ReadEntityBody (Byte[], Int32, Int32)
使用指定的要从中读取数据的缓冲区、字节偏移量和最大字节数从客户端读取请求数据(当未预先加载时)。
ASP.NET大文件上传
ASP.NET大文件上传
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zzxap 2009年12月05日
public:
virtual int ReadEntityBody (
array<unsigned char>^ buffer,
int size
)
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zzxap 2009年12月05日
readentitybody这个方法是在module中被调用的,而module中的HTTP请求都是从IIS的进程inetinfo.exe通过异名管道传入给aspnet_wp.exe的。
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youdandan 2009年12月05日
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