> Would not this conflict if you have multiple users uploading files at
the same time?
Yea, thinking along those lines. It would conflict. So if tmp =
Tempfile.new([ 'thumb', 'png' ].compact.join(".")) creates temp files
as thumb.png20101111-989-1pt72my, how would I tell Active Record to
save it with a .png extension, since it is a png file after all.
Remember, @video.attachment_thumbnail =
File.open(File.expand_path(tmp.path)), saves the file in the file
system as thumb.png20101111-989-1pt72my (raw file, no extension)
On Nov 12, 4:30 am, Brian Troutwine <[email protected]> wrote:
> On Thu, Nov 11, 2010 at 3:21 PM, Christian Fazzini
>
> <[email protected]> wrote:
> > No, the following saves the temp file.
>
> > @video.attachment_thumbnail =
> > File.open(File.expand_path(tmp.path))
>
> Ah, apologies.
>
> > However, File.expand_path(tmp.path) saves the file in the file system
> > as thumb.png20101111-989-1pt72my
> > Ideally, I would like it to save it as thumb20101111-989-1pt72my.png
>
> Okay, so you've got this:
>
> >>> tmp = Tempfile.new([ 'thumb', 'png' ].compact.join("."))
>
> The documentation for Tempfile states that .new "creates a temporary
> file of mode 0600 in the temporary directory whose name is
> basename.pid.n and opens with mode "w+". A Tempfile object works just
> like a File object." The computer is doing exactly what you tell it to
> do.
>
> > or, better, just thumb.png
>
> Would not this conflict if you have multiple users uploading files at
> the same time?
>
> > On Nov 12, 4:12 am, Brian Troutwine <[email protected]> wrote:
> >> I'm confused. You're creating a tempfile and then keeping a reference
> >> to it in your database?
>
> >> On Thu, Nov 11, 2010 at 3:06 PM, Christian Fazzini
>
> >> <[email protected]> wrote:
> >> > Ok that makes sense. Thanks Brian.
>
> >> > On the same topic...
>
> >> > How would I create a temp file with .png extension in the end.
>
> >> > tmp = Tempfile.new([ 'thumb', 'png' ].compact.join("."))
>
> >> You can't use Tempfile to do this. Well, you _can_ but you'll need to
> >> close the file--without unlinking it!--and then move the file created
> >> to the new location you want. At that points, you're better off just
> >> giving thumbnails a sequential identifier, or use their hash. Destroy
> >> the thumbnail file once you no longer need it.
>
> >> > Whenever it creates a temp file, it creates it as such:
> >> > thumb.png20101111-989-1pt72my, instead of
> >> > thumb20101111-989-1pt72my.png
>
> >> > If I try to save this via Active Record, with
>
> >> > @video.attachment_thumbnail =
> >> > File.open("#{File.expand_path(tmp.path)}"),
>
> >> > It will save the file in the file system without the extension, which
> >> > makes it impossible to read on the browser, unless I explicitly set
> >> > the extension.
>
> >> > On Nov 12, 3:54 am, Brian Troutwine <[email protected]> wrote:
> >> >> Hi Christian,
>
> >> >> Not by the end of the day, no. Each tempfile will be unlinked as soon
> >> >> as you close it. Your example code didn't have the line
>
> >> >> > dst.close(unlink_now=true)
>
> >> >> in it. You may also use dst.close!() to the same effect.
>
> >> >> --
> >> >> Brian
>
> >> >> On Thu, Nov 11, 2010 at 2:49 PM, Christian Fazzini
>
> >> >> <[email protected]> wrote:
> >> >> > Hi Brian,
>
> >> >> > Just to keep things clear. By the end of the day, /var/folders/uL/
> >> >> > uL0bYOOZEZaJH5E+BmDJVE+++TI/-Tmp-/ <-- temp dir _IS_ supposed to be
> >> >> > empty. Is this correct?
>
> >> >> > On Nov 12, 3:35 am, Brian Troutwine <[email protected]> wrote:
> >> >> >> When you close the Tempfile, be sure to pass true for unlink_now.
>
> >> >> >>http://ruby-doc.org/stdlib/libdoc/tempfile/rdoc/classes/Tempfile.html...
>
> >> >> >> On Thu, Nov 11, 2010 at 2:33 PM, Christian Fazzini
>
> >> >> >> <[email protected]> wrote:
> >> >> >> > In video controller, create action. I am using FFMPEG to generate a
> >> >> >> > thumbnail of videos that are uploaded.
>
> >> >> >> > The tempfile is created as such:
>
> >> >> >> > def create
> >> >> >> > ......
> >> >> >> > dst = Tempfile.new(basename)
> >> >> >> > dst.binmode
>
> >> >> >> > system("ffmpeg -itsoffset -4 -i #{file.path} -y -vcodec mjpeg -
> >> >> >> > vframes 1 -an -f rawvideo #{File.expand_path(dst.path)}.png")
> >> >> >> > ....
> >> >> >> > end
>
> >> >> >> > As you can see from above, ffmpeg outputs a file to the var dst
> >> >> >> > which
> >> >> >> > is an instance of Tempfile. In console, when I do:
>
> >> >> >> > ls /var/folders/uL/uL0bYOOZEZaJH5E+BmDJVE+++TI/-Tmp-/
>
> >> >> >> > thumb20101111-989-1gflwhr.png
> >> >> >> > thumb20101111-989-1pt72my.png
> >> >> >> > thumb20101111-989-kjcsgd.png
> >> >> >> > thumb20101111-989-3ocf15.png
> >> >> >> > thumb20101111-989-10azwnn.png
> >> >> >> > thumb20101111-989-7x11w7.png
>
> >> >> >> > I see a bunch of files in the directory. It seems that rails did
> >> >> >> > not
> >> >> >> > automatically delete these temp files. Should I manually delete
> >> >> >> > these
> >> >> >> > files?
>
> >> >> >> > I am worried that, if my temp dir fills up with temp files, it'll
> >> >> >> > eventually take up most of the server space...
>
> >> >> >> > Your thoughts on this matter?
>
> >> >> >> > --
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