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Re: How to validate a file in a javascript

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In comp.lang.javascript message <k6lgcv$vth$2@dont-email.me>, Mon, 29
Oct 2012 08:57:03, Denis McMahon <denismfmcmahon@gmail.com> posted:

>On Sun, 28 Oct 2012 23:32:33 -0700, Katja wrote:
>
>>> I wouldn't trust on file extensions. As a just a warning for user then
>>>
>>> it is ok. Just my "5 cents".
>>>
>> I know but I still need it =)
>
>Javascript has no direct access to the filesystem. Thus, it can not
>reliably determine the size of a file. At best, you can do (sub)string
>comparisons and regex checks against a file name entered into a form
>field.

JScript, in an HTA, running in Internet Explorer in Windows has; and it
can be fetched by (I suppose) HTTP and will run with a single additional
click.  E.G. : <http://www.merlyn.demon.co.uk/programs/32-bit/seek.hta>;
after that additional click, press green SEEK and wait a few seconds; it
will then give a directory listing (of files since yesterday).  I never
tried that before (the idea is that a local copy should be run from a
command prompt).

SEEK - see seakfyle.htm via
<http://www.merlyn.demon.co.uk/programs/32-bit/00index.htm> is a
functional 32-bit non-equivalent replacement for my 16-bit HUNT, in
<http://www.merlyn.demon.co.uk/programs/00index.htm>.  They can seek
with more discrimination than Microsoft provide; for example one can
seek files dated Friday AND between 32kB & 35kB AND name containing
Denis.

-- 
 (c) John Stockton, nr London, UK.  For Mail, see Home Page.  Turnpike, WinXP.
 Web  <http://www.merlyn.demon.co.uk/> - FAQ-type topics, acronyms, and links.
 Command-prompt MiniTrue is useful for viewing/searching/altering files. Free,
 DOS/Win/UNIX now 2.0.6; see <URL:http://www.merlyn.demon.co.uk/pc-links.htm>.

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Thread

How to validate a file in a javascript Katja <kate.kokatjuhha@gmail.com> - 2012-10-28 11:56 -0700
  Re: How to validate a file in jquery Denis McMahon <denismfmcmahon@gmail.com> - 2012-10-28 21:11 +0000
  Re: How to validate a file in a javascript Cezary Tomczyk <cezary.tomczyk@gmail.com> - 2012-10-28 22:38 +0100
    Re: How to validate a file in a javascript Katja <kate.kokatjuhha@gmail.com> - 2012-10-28 23:32 -0700
      Re: How to validate a file in a javascript Denis McMahon <denismfmcmahon@gmail.com> - 2012-10-29 08:57 +0000
        Re: How to validate a file in a javascript Cezary Tomczyk <cezary.tomczyk@gmail.com> - 2012-10-29 15:20 +0100
          Re: How to validate a file in a javascript Denis McMahon <denismfmcmahon@gmail.com> - 2012-10-29 23:22 +0000
            Re: How to validate a file in a javascript Jeff North <jnorthau@yahoo.com.au> - 2012-10-30 17:11 +1100
              Re: How to validate a file in a javascript Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-11-01 21:51 +0100
        Re: How to validate a file in a javascript Dr J R Stockton <reply1244@merlyn.demon.co.uk.invalid> - 2012-10-30 19:47 +0000

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