[web-devel] Content-Length on sendFile

Michael Snoyman michael at snoyman.com
Tue Jun 14 20:50:57 CEST 2011

I think the reason we didn't include the header is because, when I
wrote it, I didn't know of a cross-platform way to get file sizes. Now
that I know about unix-compat, this seems like a reasonable thing to
add. Anyone know a reason we *shouldn't* do this?


On Tue, Jun 14, 2011 at 8:16 PM, Nubis <nubis at woobiz.com.ar> wrote:
> Hi guys,
> Just wanted to give you a heads up that yesod's sendFile is not setting the
> Content-Length header, which 'breaks' some proxies and load balancers. (in
> our case, amazon elastic load balancer).
> I don't know if that's by design, I'm not 100% sure but not setting the
> header would be only useful for 'long pooling' of binary files for doing
> some sort of hackish http streaming, which I don't think is yesod's purpose
> anyways :)
> A workaround is setting the Content-Length header before calling sendFile, I
> guess it may be something easy to add, I was going to propose a patch that
> just wraps the current implementation in a do block that sets the header,
> but then I noticed a number of optimizations being made that hint there
> should be a 'better' way.
> cheers!
> ----nubis :)
> _______________________________________________
> web-devel mailing list
> web-devel at haskell.org
> http://www.haskell.org/mailman/listinfo/web-devel

More information about the web-devel mailing list