Feature Request: Provide a way to supply download filename to THttpResponse::writeFile()

Please add a 5th, optional parameter to THttpResponse::writeFile(), where 
we can supply a filename for use in the "Content-Disposition" header field 
of the response. Currently, the filename is derived from the basename of 
the 1st parameter, which actually contains the local path of the file to 
be sent - but there are cases where an application want might to provide a 
different default name for the file to be saved. 

For ex. files might be stored under a random-generated filename on the 
server-side by the application to prevent any possible (file)name-based 
attacks by users of the site (much like files in the browser cache are 
stored in random-named directories), but we still might want to provide 
the user with the original name of the file when offering it to download. 

Currently, however, this is not possible, as the writeFile() method 
doesn't provide us a way to supply a default filename other than that of 
the name of the local file we want to sent. But by changing

  public function writeFile
($fileName,$content=null,$mimeType=null,$headers=null)

to

  public function writeFile
($fileName,$content=null,$mimeType=null,$headers=null,$saveName=null)

and

  $fn=basename($fileName);

to

 if (!$saveName) $fn = basename($fileName); else $fn = $saveName;

the method can be easily extended to provide that functionality too.

PS: Please don't tell me to simply load the contents of the file with 
file_get_contents() and supply it as the 2nd parameter to writeFile() 
while using the 1st param as the filename, because the memory footprint of 
that solution exceeds far that of a "regular" file download, as it 
requires PHP to actually load all of the file into the memory (which might 
be hundreds of MBs with a larger download), instead of just passing it to 
the output in block chunks, like it does with readfile().

Original issue reported on code.google.com by google...@pcforum.hu on 16 Jun 2009 at 2:39

tel8618217223380 / prado3

Feature Request: Provide a way to supply download filename to THttpResponse::writeFile() #176