使用SharpZipLib通过.net中的http流式传输zip文件

using System;
using System.IO;
using System.Web;
using ICSharpCode.SharpZipLib.Zip;

public class ZipStreamHandler : IHttpHandler
{
    public void ProcessRequest(HttpContext context)
    {
        context.Response.ContentType = "application/zip";
        context.Response.AddHeader("Content-Disposition", "attachment; filename=archive.zip");

        using (var zipOutputStream = new ZipOutputStream(context.Response.OutputStream))
        {
            zipOutputStream.SetLevel(9);

            // Add files to the ZIP archive
            AddFileToZip("file1.txt", zipOutputStream);
            AddFileToZip("file2.txt", zipOutputStream);
            AddFileToZip("file3.txt", zipOutputStream);

            zipOutputStream.Finish();
            zipOutputStream.Close();
        }
    }

    private void AddFileToZip(string fileName, ZipOutputStream zipOutputStream)
    {
        using (var fileStream = new FileStream(fileName, FileMode.Open, FileAccess.Read))
        {
            var buffer = new byte[fileStream.Length];
            fileStream.Read(buffer, 0, buffer.Length);

            var entry = new ZipEntry(fileName)
            {
                Size = fileStream.Length
            };

            zipOutputStream.PutNextEntry(entry);
            zipOutputStream.Write(buffer, 0, buffer.Length);
            zipOutputStream.CloseEntry();
        }
    }

    public bool IsReusable
    {
        get { return false; }
    }
}