CGI program + c++ + download file bigger than ram

Lobinho · 08-23-2010, 07:35 AM

Hi,

I have a cgi program (written in c++), which is responsible for the management of some activities on my server (write info into a database, write logs). My problem starts when my client need to download a log file (created by reading database information) from the server, cause the file could be bigger than my ram and I can't split the file. I'm quite new to cgi programs, so I don't know another option.
I didn't find something related on google... anyone knows any link or tutorial to help-me?

Thanks in advance!

bathory · 08-23-2010, 08:59 AM

Hi,

What web server and what client are you using?
Try with wget to download the file and see if it works

Regarsd

Lobinho · 08-24-2010, 07:40 PM

Dear bathory,

Thanks for your response. I'm using BOA server (http://www.boa.org/) on an embedded environment.
I think wget won't work cause I'll build this file dynamically (read several information from several tables from database) and put everything in a biiiiig txt file.

Anyone knows how a rapidshare/megaupload works? xD
How they send those big files to our machine?
I need something like this... my file will be larger than my ram, so I can't cache the entire file before start to flush it on screen...

regards

Hidden Windshield · 08-25-2010, 10:18 AM

BOA, like most webservers, takes whatever you send to standard out (cout in the case of C++), and sends it to the client. So, all you need to do is send your log file to cout as it's being generated (after the headers).

As far as the client side program is concerned, it doesn't care (and doesn't even know) if the file is being generated on the fly or is static. So wget, Firefox, Opera, even IE would work to actually download the file.