User283571144 posted
Hi vishabedre,
According to your description, I suggest you could directly create the zip file in the memory steam and write the stream into the response’s streamcontent.
More detaisl, you could refer to below codes sample:
Notice: Since your firstly reply is C#, I also use C#. If you use VB.NET, please use the tool to convert from C#.Link:
http://converter.telerik.com/
using ICSharpCode.SharpZipLib.Zip;
using System;
using System.Collections.Generic;
using System.IO;
using System.Net;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Web;
using System.Web.Http;
namespace WebAPI.Controllers
{
public class ZipController : ApiController
{
[HttpGet]
public HttpResponseMessage DownloadZip()
{
HttpResponseMessage response = new HttpResponseMessage(HttpStatusCode.OK);
try
{
string fileDirectory = HttpContext.Current.Server.MapPath($"~/App_Resource/files/");
Dictionary<string, Stream> streams = new Dictionary<string, Stream>();
streams.Add("1.csv", new FileStream(Path.Combine(fileDirectory, "1.csv"), FileMode.Open, FileAccess.Read));
streams.Add("2.csv", new FileStream(Path.Combine(fileDirectory, "2.csv"), FileMode.Open, FileAccess.Read));
streams.Add("3.csv", new FileStream(Path.Combine(fileDirectory, "3.csv"), FileMode.Open, FileAccess.Read));
response.Content = new StreamContent(PackageManyZip(streams));
response.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment") { FileName = string.Format("download_compressed_{0}.zip", DateTime.Now.ToString("yyyyMMddHHmmss")) };
response.Content.Headers.ContentType = new MediaTypeHeaderValue("application/octet-stream");
}
catch (Exception ex)
{
response.StatusCode = HttpStatusCode.InternalServerError;
response.Content = new StringContent(ex.ToString());
}
return response;
}
/// <summary>
/// compress mutiple files and return a compressed stream
/// </summary>
/// <param name="streams">
/// key is file name
/// value is compressed stream
/// </param>
/// <returns>return a stream compressed</returns>
private Stream PackageManyZip(Dictionary<string, Stream> streams)
{
byte[] buffer = new byte[6500];
MemoryStream returnStream = new MemoryStream();
var zipMs = new MemoryStream();
using (ZipOutputStream zipStream = new ZipOutputStream(zipMs))
{
zipStream.SetLevel(9);
foreach (var kv in streams)
{
string fileName = kv.Key;
using (var streamInput = kv.Value)
{
zipStream.PutNextEntry(new ZipEntry(fileName));
while (true)
{
var readCount = streamInput.Read(buffer, 0, buffer.Length);
if (readCount > 0)
{
zipStream.Write(buffer, 0, readCount);
}
else
{
break;
}
}
zipStream.Flush();
}
}
zipStream.Finish();
zipMs.Position = 0;
zipMs.CopyTo(returnStream, 5600);
}
returnStream.Position = 0;
return returnStream;
}
}
}
Best Regards,
Brando
