[erlang-questions] Cowboy static file cahce

Loïc Hoguin essen@REDACTED
Fri Jul 5 16:08:05 CEST 2013

On 07/05/2013 03:52 PM, J K wrote:
> Hi,
> does anyone know if Cowboy can do static file caching?

It doesn't, you could do it, but you probably shouldn't do it.

When using TCP the static handler will use sendfile to send the files. 
Sendfile does the write directly from the kernel, and if the file was in 
the kernel file cache (if it was requested before/enough) it'll be very 

When using SSL you can't just write the file to the socket. So you might 
want something else.

Generally the best solution is to use a CDN for files (on a cookie-less 
domain) and this is the only recommendation we make. The static handler 
is only there to help during development.

Loïc Hoguin
Erlang Cowboy
Nine Nines

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