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Display contents of large files in browser

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Display contents of large files in browser

Jeff
I have the below controller code to allow the user to view the contents of a files in their browser. This works great for most files but for very large files (~1GB) this brings the browser to a halt. I'm wondering what the best way to handle this is.

 def displayFileContents = {
     render "<textarea rows='30' cols='80'>${new File(params.path).text}</textarea>"
 }
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Re: Display contents of large files in browser

jstell
You should consider "paging" through the file -- displaying single chunks of the content at a time. Similar to what you would do with paging through records in a database table.

Basically, you keep track of a [page #] and a [page size] (number of chars or bytes in a page). Then use a RandomAccessFile to read [page size] bytes from the file beginning at the appropriate offset ([page #] * [page size]).

You can calculate the number of pages by [file size] / [page size]


Jason

On Tue, Apr 17, 2012 at 8:50 AM, Jeff <[hidden email]> wrote:
I have the below controller code to allow the user to view the contents of a
files in their browser. This works great for most files but for very large
files (~1GB) this brings the browser to a halt. I'm wondering what the best
way to handle this is.

 def displayFileContents = {
    render "<textarea rows='30' cols='80'>${new
File(params.path).text}</textarea>"
 }

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Re: Display contents of large files in browser

Jeff
Thanks Jason. That certainly looks like the way to go.
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