Download a zip file using ajax response

Question

I need to download a zip file using ajax and ashx. Currently I am using the code https://stackoverflow.com/a/23797348 but the downloaded zip file is invalid.

The ashx code i am using is :

MemoryStream exportPrjtResponseMemStream = SomeClass.ReturnResponse(ID);

Response.ContentType = "application/zip";

Response.AppendHeader("content-disposition", "attachment; filename=\"" + fileName + ".zip\"");

Response.CacheControl = "Private";

Response.AppendHeader("Content-Length", exportPrjtResponseMemStream.Length.ToString());                            
exportPrjtResponseMemStream.WriteTo(Response.OutputStream);

Response.Flush();

Response.End();

Please suggest.

@MichalHainc there is no delta between the two files both are of same size. — Praveen, Feb 05 '15 at 10:17
@MichalHainc: I have recieved the stream correctly in browser but somehow it gets corrupted while downloading. When I am passing the url as SRC in IFrame it is downloading correctly but the file corrupts if I am using ajax request. — Praveen, Feb 05 '15 at 13:00

score 0 · Answer 1 · edited May 23 '17 at 12:28

0

Are you setting 'Response.BufferOutput=true' ?
Once you read the MemoryStream (exportPrjtResponseMemStream) set the position to 0 exportPrjtResponseMemStream.Position=0 before using it to write to OutputStream.
Try using 'Response.OutputStream.Flush()'

My guess is the ResponseStream is not being properly built. Also try setting all the headers as per the solution in your link above.

HTH!

edited May 23 '17 at 12:28

Community

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answered Feb 05 '15 at 08:35

amitthk

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Yes i am setting the headers correctly also i am getting the memory stream in browser response but it is not downloading. – Praveen Feb 06 '15 at 05:48
Hi, Can you remove `Response.End()` and try? Why I asked "Response.BufferOutput=true" is because you don't need to call `Response.End()` after `Response.Flush()`. Otherwise, use `Response.Clear(); exportPrjtResponseMemStream.WriteTo(Response.OutputStream); Response.End(); ` – amitthk Feb 06 '15 at 06:40
Also, please be careful about the case sensitivity of the headers. I mean `Response.CacheControl="private"`. I see you mention your code is working with iframe, otherwise I would suggest manual writing of MemoryStream as in [this link](http://support.microsoft.com/kb/812406) – amitthk Feb 06 '15 at 06:56

Download a zip file using ajax response

1 Answers1