attachment or download filename should have a max length - else some browsers fail

[kapouer]

Hi,

when giving a filename long enough (254 chars long, for example), some browsers fail the download with an error.
Express should warn, or even truncate the filename (but keep the file extensions).
Using express@4.15.3:

• epiphany 3.24, chromium 58 fail
• firefox 45.9 does not fail

[dougwilson]

Is there a specification on what the max length is or at least somewhere to determine what the max lengths for all the possible clients will accept are?

[kapouer]

That is still to be found. I wasn't able to find any kind of limitation explicitely coded into webkit trunk.

[dougwilson]

It doesn't sound like there is anything actionable here. If you think otherwise, please let me know what steps you would like to see taken (perhaps even a pull request)! If this is actually a violation of a spec or even just understanding what limits the clients have, that would be great to have, but limiting it for two clients out of many doesn't seem like a limit that should be built in Express directly.