Posted by Eric on 05/19/06 20:08

Martin Jay wrote:

> In message <2IKdnetQhNV1cfDZRVn-qA@comcast.com>, Eric <nospam@email.com>
> writes
>>Martin Jay wrote:
>>> In message <fa6dnfXtqdyC1ffZ4p2dnA@comcast.com>, Eric <nospam@email.com>
>>> writes
>>>>Is it possible to check for existence of a file from a web page using
>>>>javascript? I am trying to come up with a routine that i can call from
>>>>the rest of my javascript code that will check if a particular file
>>>>exists on disk at the server. ie bool
>>>>FileExists("http://myServer.com/File.gif"); Any ideas on how to do this?
>
>>> I cannot think of a way to achieve this.
>>>
>>> You could, however, include a list of filenames in your Javascript, and
>>> then simply check it to see whether a particular file exists.
>>>
>>> There are some problems, though:
>>>
>>> you may not wish to give visitors a list of all the files;
>>>
>>> the list may be rather long;
>>>
>>> and it might be a pain keeping the list up-to-date. :(
>>>
>>> Does your host offer server side scripting, such as PHP or Perl? That's
>>> probably the best solution.
>
>>Yes, but HOW? do you determine a file is there? I'm not looking for
>>unknown files, I'm looking for a very specific filename.
>>Eric
>
> From the PHP manual:
>
> <?php
> $filename = '/path/to/foo.txt';
>
> if (file_exists($filename)) {
> echo "The file $filename exists";
> } else {
> echo "The file $filename does not exist";
> }
> ?>
How do i do that from javascript? Can i call it somehow? I'm in a javascript
loop looking at a series of files, and if one is missing i need to break
out of the loop early.
Thanks
Eric

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