Hey Team,
Just recently Chrome has been updated which now blocks certain files with
certain extensions (like those with .zip extension) from being saved to the
desktop. Chrome no longer presents a Save As dialog when using the following
code. (taken and slightly modified from the ticket [1]).
var saveFile:FileReference = new FileReference();
saveFile.save(zipBinaryContent,"ourArchive.zip");
If you change the filename parameter to not have the ".zip" extension, then the
Save As dialog appears.
The chromium team's current response on the issue is as follows [2]:
"This is working-as-intended.
For security reasons, Chrome will now block dangerous (executable) file types
from being downloaded via Flash since they bypass Chrome's Safe Browsing
protection. This bypass is being actively exploited MUCH more than it is used
for legitimate reasons unfortunately, so for users' security it is blocked.
If you need to work around it: 1) download via javascript rather than within
Flash, or 2) download to a different extension and ask the user to rename. If
there is a domain where a large number of users are adversely affected (>1000
downloads/day), please let me know so we can look into it further."
This change in Chrome has an immediate affect on any Flex based application
that used the documented flash API to save files to the user's system. A full
list of extensions has not been made available yet, but so far if you use that
API with the following extensions the Save As dialog will not appear and there
will be no warning or feedback shown to the end user:
zip, exe, com, bat, gzip, and xml.
You can find the full ticket here [3]. They are seeking feedback from sites
that have >1000 downloads a day to continue their research into the issue.
Cheers,
Chris
[1] https://code.google.com/p/chromium/issues/detail?id=576708#c13[2]
https://code.google.com/p/chromium/issues/detail?id=576708#c25[3]
https://code.google.com/p/chromium/issues/detail?id=576708
