如何上传及下载大小超过100M的文件

sunli333 2006-10-30 08:34:01

如题，要能运行的源代码，分不够可再加100

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rgwfeng2 2007-02-18

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mark

阿良chjlcn 2007-02-04

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收藏。

ddesign 2007-01-23

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学习``````

sujo 2006-11-14

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其实很多时候都有这种需求的。边读边写怎么做呢？

soarheaven 2006-11-11

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留个记号

o07 2006-11-10

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sunli333 2006-11-03

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谢谢楼主上的yuanmu(原木) 兄弟、孟老大及各位朋友的支持，虽然没完全解决问题，但也准备结贴了

yuanmu 2006-11-02

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handler 类为：
namespace CoolUpload
{
public class module : IHttpModule
{
private string path = @"d:\iis\";

public void Dispose()
{
}

public void Init(HttpApplication application)
{
application.BeginRequest += (new EventHandler(this.BeginRequest));
}

public void BeginRequest(Object sender, EventArgs e)
{
HttpApplication context = sender as HttpApplication;

if (context.Request.ContentType.ToLower().StartsWith("multipart/form-data"))
{
IServiceProvider provider = (IServiceProvider)HttpContext.Current;
HttpWorkerRequest wr = (HttpWorkerRequest)provider.GetService(typeof(HttpWorkerRequest));

if (!wr.HasEntityBody()) return;

int theOtherLength = 0;
int contentLength;
string contentType;

contentLength = Convert.ToInt32(wr.GetKnownRequestHeader(HttpWorkerRequest.HeaderContentLength));
contentType = wr.GetKnownRequestHeader(HttpWorkerRequest.HeaderContentType);

FileStream fs = null;

... ... 写文件 ....

//处理第一次读取的内容
byte[] b1 = wr.GetPreloadedEntityBody();
fs.Write(b1, 0, b1.Length);
theOtherLength = contentLength - b1.Length;

b1 = null;

int n = 65536;
int i = 0;

//读取剩余的数据，接着写文件
while (theOtherLength > 0)
{
byte[] b = new byte[n];
int readbytes;

if (theOtherLength <= n)
{
readbytes = wr.ReadEntityBody(b, theOtherLength);
}
else
{
readbytes = wr.ReadEntityBody(b, n);
}

fs.Write(b, 0, readbytes);
b = null;

theOtherLength -= readbytes;
i++;
}

fs.Close();
fs = null;
}

}

}

}

yuanmu 2006-11-02

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handler 类为：
namespace CoolUpload
{
public class handler : IHttpHandler
{
private string path = @"d:\iis\";

public void ProcessRequest(HttpContext context)
{
IServiceProvider provider = (IServiceProvider)context;
HttpWorkerRequest wr = (HttpWorkerRequest)provider.GetService(typeof(HttpWorkerRequest));

if (!wr.HasEntityBody()) return;

int theOtherLength = 0;
int contentLength;
string contentType;

contentLength = Convert.ToInt32(wr.GetKnownRequestHeader(HttpWorkerRequest.HeaderContentLength));
contentType = wr.GetKnownRequestHeader(HttpWorkerRequest.HeaderContentType);

FileStream fs = null;

... ... 写文件 ....

//处理第一次读取的内容
byte[] b1 = wr.GetPreloadedEntityBody();
fs.Write(b1, 0, b1.Length);
theOtherLength = contentLength - b1.Length;

b1 = null;

int n = 65536;
int i = 0;

//读取剩余的数据，接着写文件
while (theOtherLength > 0)
{
byte[] b = new byte[n];
int readbytes;

if (theOtherLength <= n)
{
readbytes = wr.ReadEntityBody(b, theOtherLength);
}
else
{
readbytes = wr.ReadEntityBody(b, n);
}

fs.Write(b, 0, readbytes);
b = null;

theOtherLength -= readbytes;
i++;
}

fs.Close();
fs = null;

}

public bool IsReusable
{
get { return false; }
}

}

}

yuanmu 2006-11-02

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有两种方法，分别使用 IHttpHandler 和 IHttpModule
最终它们又都用 HttpWorkerRequest 读字节流。

IHttpHandler 的 web.config 的配置类似

<httpHandlers>
<add verb="POST" path="uplaod.aspx" type="CoolUpload.handler,CoolUpload"/>
</httpHandlers>
----------------------------------
IHttpModule 的 web.config 的配置类似

<httpModules>
<add name="module" type="CoolUpload.module,CoolUpload" />
</httpModules>