Re: Downloading strangeness: downloaded file has no content

On 10/1/2022 3:48 PM, Tim Streater wrote:
> On 01 Oct 2022 at 17:57:19 BST, Jerry Stuckle <[email protected]> wrote:
> 
>> On 10/1/2022 10:50 AM, Tim Streater wrote:
>>> For those requesting that a file be downloaded from my website, having
>>> selected a file (a .zip or a .dmg), the following is then executed:
>>>
>>> <font color="#000000">header('Content-Description: File Transfer');</font>
>>> header('Content-Type: application/octet-stream');
>>> header('Content-Disposition: attachment; filename="' . basename ($file) .
>>> '"');
>>> header('Content-Transfer-Encoding: binary');
>>> header('Expires: 0');
>>> header('Cache-Control: no-cache, must-revalidate, post-check=0, pre-check=0');
>>> header('Pragma: public');
>>> header('Content-Length: ' . filesize ($file));
>>>
>>> ob_clean ();
>>> flush ();
>>> readfile ($file);
>>>
>>>
>>> For most of the files to be downloaded, this works just fine. But for one of
>>> them, the downloaded file has zero content at the receiver's end: it is zero
>>> bytes long. The file on the server is correct - I can download it using an FTP
>>> client and drag/drop the file off the server and onto my desktop. Then it has
>>> the correct size/content.
>>>
>>> Any suggestions as to why this might be?
>>
>> Tim,
>>
>> What's in your PHP error log?  It's always the first place I check when
>> I have weird problems.
> 
> Good question. I'll have to get on to the hosting provider or see whether with
> the tools I have access to, I can locate it. I was minded to contact them
> anyway, in case there's some file caching issue that requires a restart of
> whatever VM they're running for me.
> 
>> Have you checked the contents of $file?  Is it correct - including the
>> path?  What is the result of filesize($file)?
> 
> I log these items just before the first header is sent and they are as
> expected. Filesize is 131Mbytes (not easily overlooked).
> 
>> What are the ownership
>> and permissions on the file?  Does the web server have read access to it?
> 
> This is worth checking too, no doubt about it. :-)
> 

Tim,

131Mbytes?  That brings up another question.  Is this the larges of the 
files?  Does your hosting company have a file size limit?

Jerry

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