[TYPO3-dev] Possible IE bug in dam_frontend

[Jason Alexander]

Hello all,

I was just curious if anyone has had any problems using the  
dam_frontend in IE. The issue we are having is that when you try to  
download a file we get this error:

	Internet Explorer cannot download FILENAME from SITE
	Internet Explorer was not able to open this Internet Site. The  
requested site is either unavailable or cannot be found. Please try  
again later.

I have figured out that it is a known Microsoft bug when trying to  
download some file with IE. Here is Microsoft explanation:

In order for Internet Explorer to open documents in Office (or any out- 
of-process, ActiveX document server), Internet Explorer must save the  
file to the local cache directory and ask the associated application  
to load the file by using IPersistFile::Load. If the file is not  
stored to disk, this operation fails.

When Internet Explorer communicates with a secure Web site through  
SSL, Internet Explorer enforces any no-cache request. If the header or  
headers are present, Internet Explorer does not cache the file.  
Consequently, Office cannot open the file.

If I go into the pushfile.php (within the extension) and edit the  
sendFile function by defining Pragma like so:

header("Pragma: private"); or header("Pragma: public");

(doesn't work with header("Pragma: no-cache"); )

then the file is allowed to be downloaded through IE. I was just  
curious as to why this may happen. I have the fix but unsure why this  
fix is working. Any comments, suggestion would be greatly appreciated.

Is this a DAM bug? Of this also happens in mm_dam_filelist as well.  
Can't find anything about this through Google.

Thanks in advance,

Jason