Re: [PHP] Query regarding temporarily-uploaded files

On 7/10/2013 2:15 PM, Ajay Garg wrote:
> Thanks Jim and Matijn for the quick replies.
> I will try to have a workaround.
>
>
>
> On Wed, Jul 10, 2013 at 11:09 PM, Matijn Woudt <[email protected]> wrote:
>
>>
>>
>>
>> On Wed, Jul 10, 2013 at 7:21 PM, Ajay Garg <[email protected]> wrote:
>>
>>> Hi all.
>>>
>>> I have a requirement, wherein I need to allow vanilla uploads of files
>>> to a HTTPD server.
>>>
>>> Any client can upload any number of files (one at a time).
>>> Also, there is just one directory, where the files get stored
>>> "finally" (that is, after being copied from the temporary location,
>>> via "move_uploaded_file")
>>>
>>> Also, I have been able to get the simple file uploading running via
>>> PHP, by picking up one of the numerous "Hello World" examples
>>> available :)
>>>
>>>
>>>
>>> Now, I am facing the following use-case ::
>>>
>>> 1)
>>> User 1 starts uploading a large file, say "big_file.avi".
>>>
>>> 2)
>>> Meanwhile, user 2 also starts uploading a (different) file, but with
>>> the same name "big_file.avi".
>>>
>>>
>>> In an ideal scenario, user 2 should be prompted with a message, that a
>>> file of the same name is already being uploaded by someone else
>>> somewhere.
>>> Is there a way to do this?
>>>
>>> ( Note that, had the user 2 started uploading AFTER user 1 had
>>> finished with the upload, we could probably modify the PHP-script at
>>> the sever-side, to let user-2 know that a file of the same name
>>> already exits. But I am failing to find a solution, when the user 2
>>> starts the upload WHILE the large file of user 1 is in the process of
>>> completing uploading).
>>>
>>>
>>> Any way the issue may be solved?
>>>
>>> I will be grateful for any pointers :)
>>>
>>>
>>>
>>> Regards,
>>> Ajay
>>>
>>>
>>
>> Hi,
>>
>> This is not possible with PHP, PHP will not know about the file until the
>> upload is completed. You can use HTML5 or flash(not recommended) for an
>> alternative way of uploading, and then you can check the file name in
>> advance.
>>
>> - Matijn
>>
>
>
>
As Matijn said, you don't know the name until your php processes the 
file that has been uploaded alreaday.  But my solution will work for you 
- you just have to save it under the temp name until the user responds 
to your message and request for a new title.  You may have to run a 
periodic script to clean up any files with your temp names that the user 
declined to re-name for you.  I'd make up a temp name with some special 
prefix so that you can find and delete them.