[Haskell-cafe] HSGI: Haskell Server Gateway Interface
manlio_perillo at libero.it
Sat Feb 7 16:52:21 EST 2009
Felix Martini ha scritto:
> Hi Manlio,
> Have you looked at
> http://www.haskell.org/haskellwiki/WebApplicationInterface ?
If you remember, I posted a few messages in the thread where WAI was
There is a separate channel where we can discuss in detail?
Or should I just use this thread?
> If you
> did is there something in that proposal that you think should be
> changed or is not clear?
Here are the problems:
1) supported HTTP methods are fixed, since you use a custom data type
2) no support for other possible CGI variables
(or simply custom variables: I use the environ dictionary to store
application configuration, and I think it is a great thing).
I think that we should simply have a dictionary
Map ByteString ByteString
3) No support for optimized file serving, like with WSGI file_wrapper
4) No support for keeping "complex" state (like database connection) in
I have read some examples with CGI package, where a custom monad
transformer is used.
I'm not sure if this solution is flexible and "scalable".
5) I can't find documentation about the type of the response.
It is rather clear that it is
(ByteString, [(ByteString, ByteString)], Enumerator)
but this should be documented somewhere.
There are also few typos:
* Chapter 2:
"A standardized interface is of no use of no..."
"A standardized interface is of no use if no..."
* Chapter 4.2
"However, if the the amount..."
"However, if the amount..."
As a last note: I have some doubts about the name, since gateway is not
in it ;-).
Regards Manlio Perillo
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