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Erik de Castro Lopo

8 Dec 2011 8 Dec '11

10:50 p.m.

Hi all, I'm a bit stumped on how to use the RequestBodyBuilder constructor: http://hackage.haskell.org/packages/archive/http-enumerator/latest/doc/html/... Is anyone able to point me at some code that uses this? Cheers, Erik -- ---------------------------------------------------------------------- Erik de Castro Lopo http://www.mega-nerd.com/

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Michael Snoyman

9 Dec 9 Dec

1:27 a.m.

On Fri, Dec 9, 2011 at 5:50 AM, Erik de Castro Lopo wrote:

Hi all,

I'm a bit stumped on how to use the RequestBodyBuilder constructor:

http://hackage.haskell.org/packages/archive/http-enumerator/latest/doc/html/...

Is anyone able to point me at some code that uses this?

Cheers, Erik -- ---------------------------------------------------------------------- Erik de Castro Lopo http://www.mega-nerd.com/

_______________________________________________ web-devel mailing list web-devel@haskell.org http://www.haskell.org/mailman/listinfo/web-devel

No examples, sorry, but the idea is to provide a Builder instead of a ByteString, so that you can cheaply concatenate together smaller pieces and avoid a potentially costly length operation *if* you know the ultimate size of the body. You could consider the following to be equivalent: RequestBodyBS bs ~== RequstBodyBuilder (S.length bs) (fromByteString bs) HTH, Michael

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Erik de Castro Lopo

2:16 a.m.

New subject: Any examples of using RequestBodyBuilder from http-enumerator

Michael Snoyman wrote:

RequestBodyBS bs ~== RequstBodyBuilder (S.length bs) (fromByteString bs)

Ok, that probably means I need to look at RequestBodyEnum instead. What I'd like to do is somthing like: status <- getFileStatus fname let size = fromIntegral $ fileSize status req { HE.requestBody = HE.RequestBodyEnum size $ enumBuilder fname } where enumBuilder :: String -> Enumerator Builder IO () enumBuilder fname = EB.enumFile fname ........ but I can't get the types to match up. Its seems the () requirement for enumBuilder is too inflexible. Cheers, Erik -- ---------------------------------------------------------------------- Erik de Castro Lopo http://www.mega-nerd.com/

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Aristid Breitkreuz

3:04 a.m.

I think I had a similar problem once. The () may need to be changed to forall a. a. Consider filing a bug in http-enumerator. Aristid Am 09.12.2011 08:16 schrieb "Erik de Castro Lopo" :

Michael Snoyman wrote:

...
RequestBodyBS bs ~== RequstBodyBuilder (S.length bs) (fromByteString

bs)

Ok, that probably means I need to look at RequestBodyEnum instead.

What I'd like to do is somthing like:

status <- getFileStatus fname let size = fromIntegral $ fileSize status req { HE.requestBody = HE.RequestBodyEnum size $ enumBuilder fname } where enumBuilder :: String -> Enumerator Builder IO () enumBuilder fname = EB.enumFile fname ........

but I can't get the types to match up. Its seems the () requirement for enumBuilder is too inflexible.

Cheers, Erik -- ---------------------------------------------------------------------- Erik de Castro Lopo http://www.mega-nerd.com/

_______________________________________________ web-devel mailing list web-devel@haskell.org http://www.haskell.org/mailman/listinfo/web-devel

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Michael Snoyman

3:13 a.m.

Can I see an actual code snippet where this comes up? I'd be surprised if we need such a change. On Fri, Dec 9, 2011 at 10:04 AM, Aristid Breitkreuz wrote:

I think I had a similar problem once. The () may need to be changed to forall a. a. Consider filing a bug in http-enumerator.

Aristid

Am 09.12.2011 08:16 schrieb "Erik de Castro Lopo" :

...
Michael Snoyman wrote:

...
RequestBodyBS bs ~== RequstBodyBuilder (S.length bs) (fromByteString bs)

Ok, that probably means I need to look at RequestBodyEnum instead.

What I'd like to do is somthing like:

status <- getFileStatus fname let size = fromIntegral $ fileSize status req { HE.requestBody = HE.RequestBodyEnum size $ enumBuilder fname } where enumBuilder :: String -> Enumerator Builder IO () enumBuilder fname = EB.enumFile fname ........

but I can't get the types to match up. Its seems the () requirement for enumBuilder is too inflexible.

Cheers, Erik -- ---------------------------------------------------------------------- Erik de Castro Lopo http://www.mega-nerd.com/

_______________________________________________ web-devel mailing list web-devel@haskell.org http://www.haskell.org/mailman/listinfo/web-devel

_______________________________________________ web-devel mailing list web-devel@haskell.org http://www.haskell.org/mailman/listinfo/web-devel

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Erik de Castro Lopo

5 a.m.

New subject: Any examples of using RequestBodyBuilder from http-enumerator

Erik de Castro Lopo wrote:

Michael Snoyman wrote:

...
RequestBodyBS bs ~== RequstBodyBuilder (S.length bs) (fromByteString bs)

Ok, that probably means I need to look at RequestBodyEnum instead.

What I'd like to do is somthing like:

status <- getFileStatus fname let size = fromIntegral $ fileSize status req { HE.requestBody = HE.RequestBodyEnum size $ enumBuilder fname } where enumBuilder :: String -> Enumerator Builder IO () enumBuilder fname = EB.enumFile fname ........

but I can't get the types to match up. Its seems the () requirement for enumBuilder is too inflexible.

Yay! Got it at last: enumBuilder :: String -> Enumerator Builder IO () enumBuilder fname = EB.enumFile fname $= EL.map fromByteString Erik -- ---------------------------------------------------------------------- Erik de Castro Lopo http://www.mega-nerd.com/

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Aristid Breitkreuz
Erik de Castro Lopo
Michael Snoyman