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RE: Problem Downloading Large Files
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RE: Problem Downloading Large Files


  • Subject: RE: Problem Downloading Large Files
  • From: Leigh Kivenko <email@hidden>
  • Date: Fri, 03 May 2019 20:53:03 +0000
  • Thread-topic: Problem Downloading Large Files

Thanks for the quick response Hugi.

We tried using FileInputStream with setContentStream. It was also giving 0Kb
files as well.

Leigh Kivenko | Chief Technology Officer
PortfolioAid
t. 416-479-0523 | e. email@hidden<mailto:email@hidden>

This e-mail may be privileged and confidential. If you received this e-mail in
error, please do not use, copy or distribute it, but advise me immediately (by
return e-mail or otherwise), and delete the e-mail.

From: Hugi Thordarson [mailto:email@hidden]
Sent: Friday, May 03, 2019 2:07 PM
To: Leigh Kivenko <email@hidden>
Cc: email@hidden
Subject: Re: Problem Downloading Large Files

Hi Leigh,
since the InputStream is called "byteIn" I'm guessing it's a
ByteArrayInputStream, meaning the data it contains has been loaded to memory.
If you have an actual file, you might consider using a FileInputStream instead.

Cheers,
- hugi


On 3 May 2019, at 18:02, Leigh Kivenko
<email@hidden<mailto:email@hidden>> wrote:

Hi All,
I was wondering if anyone has encountered this issue and has been able to
resolve it:

In one page of our web app, users have the ability to download files. We are
having an issue when the user attempts to download a large file (> 500MB -
zip), where the app throws an Out of Memory error. The download functionality
is coded by:
1.       Converting the file to FileInputStream and then to NSData
2.       appending the file to the WOResponse.
a.  response.appendContentData(fileNSData)

This approach is described here :
https://en.wikibooks.org/wiki/WebObjects/Web_Applications/Development/Examples/Return_a_File

We also tried using the following approach (also described in link above):
1.       Using ByteArrayInputStream
>  response.setContentStream(byteIn, 4096, length);

In both cases, the user receives a 0KB file.

Does anyone have any recommended approaches to serve a large file through the
application?  Please note the file lives on the application server but for
security purposes we wouldn’t want it directly accessible.

Thanks,
Leigh Kivenko | Chief Technology Officer
PortfolioAid
t. 416-479-0523 | e. email@hidden<mailto:email@hidden>

This e-mail may be privileged and confidential. If you received this e-mail in
error, please do not use, copy or distribute it, but advise me immediately (by
return e-mail or otherwise), and delete the e-mail.

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  • Follow-Ups:
    • Re: Problem Downloading Large Files
      • From: Hugi Thordarson <email@hidden>
    • Re: Problem Downloading Large Files
      • From: Aaron Rosenzweig <email@hidden>
References: 
 >Problem Downloading Large Files (From: Leigh Kivenko <email@hidden>)
 >Re: Problem Downloading Large Files (From: Hugi Thordarson <email@hidden>)

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