Problem with zipping files on a server

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I have images on my website where the user can download selected images. When the user selects more than one image the files are downloaded as zip files; the zipping process takes place on the server.

However, when the user selects more files( the size also increase let say by 50MB) so when he presses download the zipping starts on server. The web page is hanging and the user can't do anything until the zipping process has completed.

Sometimes the browser (like Chrome) gives messages (process is taking too long , kill this process). So I am looking for some help here.

I need a solid suggestion :)

Thanks

Posted 20-Jan-11 0:06am

bachasafyan

Updated 20-Jan-11 0:11am

Slacker007

v2

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Kasson · Answer 1 · 2011-01-20T00:12:00

Solution 1

This[^] will give you an idea.

Btw if you posted your code, our experts can glance it, and give the feedback.

Posted 20-Jan-11 0:12am

Kasson

Comments

bachasafyan 20-Jan-11 6:16am

Thanks for the link,
I have the same code
The problem is that, the problem is with zipping the files on the server due to there large size.
So I am looking for:
is there any way that i can start this zipping on the server as a different process and user continue his work, (not waiting for the zipping)

soni uma 20-Jan-11 6:18am

Create one exe that make zipping process and send mail to client with file.

soni uma · Answer 2 · 2011-01-20T00:17:00

Solution 3

Hi,

You can increase httpruntime using web confige.
In web confige use this ..

<httpRuntime executionTimeout="90" maxRequestLength="2097151" useFullyQualifiedRedirectUrl="false" minFreeThreads="8" minLocalRequestFreeThreads="4" appRequestQueueLimit="100"/>

Or another thing is you can use your own exe that do this all thing in background. when file size is more than 50mb than tell user that an automatic mail will send you will file. you have to start your exe on server that do all zipping process and send mail to user.

Posted 20-Jan-11 0:17am

soni uma

Comments

bachasafyan 20-Jan-11 6:30am

@ Soni Uma,
I use the time out what you mentioned but that didnt helped me,
the browser still hangs as the zipping take file and the chrome gives the message Kill the process ,
and mailing to user is like the customer cant wait for the email.
he want to do it in real time :(

do you have idea how can i tell the server to start zipping as another process and the user continue the browsing?

soni uma 20-Jan-11 6:57am

@bachasafyan

I think as per your requirement you can not do that after start zipping and customer continue browsing. Because how can u give customer your zipping file after finished. You have to do following thing that is work for you
1. You have to set limit for your file (No of images)
2. For small file do it using browser but if file going to large than tell customer that file in processing wait for some time and mail that file. (in this case crone is working)

bachasafyan 20-Jan-11 7:20am

@soni Uma:
Thanks for your useful suggestion.
I will go for Suggestion 2.
Can you refer me to an article or example. for suggestion no2?
thanks for your efforts :)

soni uma 20-Jan-11 7:26am

@bachasafyan
See following link it may help you.
http://littledotnetspace.blogspot.com/2009/02/console-application-to-zip-your-files.html

bachasafyan 20-Jan-11 7:36am

@Soni Umi,
Thanks for the link i will look at it and try to follow it, I hope it will be useful :)
Thanks

bachasafyan 20-Jan-11 7:57am

@Soni Umi,
Well i tried that code as well,
just like before all goes smooth,
and the problem comes again with the zipping the large file on server.
i am badly stuck at this :(
:confused:

raju melveetilpurayil · Answer 3 · 2011-01-20T03:08:00

Using 7Zip command line tool you can Zip file or folders in server.
you can download 7Zip command line tool from Here[^]

check the sample code to zip a folder

C#

protected void ZipFolder_Click()
   {
       ProcessStartInfo p = new ProcessStartInfo();
       string sourceName = Server.MapPath("test");
       string targetName = Guid.NewGuid().ToString();
       p.FileName = Server.MapPath("7za.exe");
       string ZipCommand = string.Format(@" a -tzip {0}.zip {1}\*", targetName, sourceName);
       p.Arguments = ZipCommand;
       p.WindowStyle = ProcessWindowStyle.Hidden;
       p.UseShellExecute = false;
       Process x = Process.Start(p);
       String errmsg = "";
       while (!x.StandardOutput.EndOfStream)
       {
           errmsg += x.StandardOutput.ReadLine() + "<br />" + Environment.NewLine;
       }
       Response.Write(errmsg);
       x.WaitForExit();
   }

if you want to know more check
7-Zip Command-Line Examples[^]
.NET 7-Zip Executable Tutorial[^]