web-devel

Download

web-devel@haskell.org

February 2013

5 participants
2 discussions

Parallel IO manager
by Kazu Yamamoto 13 Feb '13

13 Feb '13

Hello, As you may know, parallel IO manager has been merged to the master branch of GHC and the base library. If you compile your network code by this GHC with the "-threaded" option and you execute it with +RTS -Nx option where "x" is the number of cores, your network code can utilize the cores. No modification is necessary for your network code. No more prefork technique! The parallel IO manager is stable on Linux and FreeBSD. But it is a little bit unstable on Mac at this moment. If you are interested, please give a try. And let Andreas and me know if you have problems. --Kazu

2 1

WAI enhancement: request body size
by Michael Snoyman 12 Feb '13

12 Feb '13

I'd like to make an addition to the WAI protocol: a field in the Request data type to track the request body size. I would like this to be: requestBodyLength :: Maybe Word64 I think the choice of Word64 makes sense without further explanation. The perhaps surprising part is the use of `Maybe`. The reason for this is that in the case of a chunked request body, there's no way to know the size of the request body from the headers alone. So the logic for populating this field would go something like: - If content-length is supplied by the user, parse it and populate the field with Just content-length. - If the request is chunked, populate with Nothing. - Otherwise, there is a zero-sized request body, and populate with Just 0. One other idea would be to create a special datatype such as `data RequestBodyLength = ChunkedBody | KnownLength Word64`, but I don't believe it really adds much above the `Maybe Word64`. Any thoughts on this proposal? Note: This is related to Yesod issue: https://github.com/yesodweb/yesod/issues/468

4 4