Downloading zip file from HttpRequestMessage : controller - asp.net

Question

I'm working on a web api's using ASP.NET MVC's which download the zip file attached in the HttpRequestMessage
as below
var task = this.Request.Content.ReadAsStreamAsync();
task.Wait();
if (this.Request.Content.IsMimeMultipartContent())
{
using (Stream requestStream = task.Result)
{
// Do not know how to copy the above request to file stream or zip (ionic zip) and generate zip file from it
}
}
note:
1)
using (var fileStream = File.Create("name.zip"))
{
requestStream.CopyTo(fileStream);
}
creates invalid zip..
2) Zip contains many files inside it.
Waiting for your comments
Update 1:
var provider = new MultipartFormDataStreamProvider(ScriptPath);
Request.Content.ReadAsMultipartAsync(provider);
foreach (MultipartFileData file in provider.FileData)
{
Trace.Write(file.Headers.ContentDisposition.FileName);
Trace.Write("Server file path: " + ScriptPath);
}
though does not help me

Answer 1

This works for me. Please treat as pseudo as I didn't compile it. Also you may want to rework the blocking .Result call to take advantage of the Async read.
var requestStream = await Request.Content.ReadAsMultipartAsync();
HttpContent fileContent = requestStream.Contents.SingleOrDefault(c => c.Headers.ContentType != null);
byte[] fileBytes = await fileContent.ReadAsByteArrayAsync();
using (FileStream fs = File.OpenWrite(outputPath))
{
fs.Write(fileBytes, 0, (int)fileContent.Headers.ContentLength.Value);
}