Commit graph

9 commits

Author SHA1 Message Date
Index Int
f2f7b061d2 Drop EitherT in favor of ExceptT 2015-09-12 15:11:24 +03:00
Julian K. Arni
6eb7add53a stylish haskell changes
And import fix.
2015-08-18 00:07:12 +02:00
Andres Loeh
eb86a82105 Refactoring: one module per concept.
The main `Server.Internal` module was getting a bit large for my taste.
It now contains just the instances. All the administrative utilities
are in their own dedicated modules.
2015-06-04 13:14:31 +02:00
Andres Loeh
f9b1e7fc50 Switch server interpretation to a datatype for efficiency.
Instead of directly interpreting a server as a `RoutingApplication`,
this change introduces the concept of a `Router`, which is a datatype
with several constructors.

In particular, the type of the `route` function changes from

    route :: Proxy layout -> Server layout -> RoutingApplication

to

    route :: Proxy layout -> IO (RouteResult (Server layout)) -> Router

Most important in practice is the case of the `StaticRouter` constructor
in `Router`. For choices between statically known paths, we can now use
a lookup table to dispatch requests rather than trying each request
individually.

This brings down routing complexity of a common case from
O(n) to O(log n).

Another important change is that the handler that is passed down by
`route` is no longer of type `Server layout`, but of type
`IO (RouteResult (Server layout))`. This means that API constructs
can "delay" checks and failure. For example, `ReqBody` does not have
to fetch the request body and feed it to the handler immediately; it
can instead record these actions in the handler that is passed down.
The code will only be executed at a leaf / endpoint of the API.

This is desired behaviour: We prefer to save work by doing all matching
on static path components first. Furthermore, we get better error codes
by doing so.
2015-06-04 13:07:53 +02:00
Julian K. Arni
50b05860b7 Remove Canonicalize 2015-05-03 01:45:17 +02:00
Julian K. Arni
bdf6d9aa48 Better docs for servant-server 2015-05-03 01:28:13 +02:00
Julian K. Arni
74f4d2db14 Enter via natural transformations 2015-05-03 00:15:35 +02:00
Julian K. Arni
a2b8d6ae58 Better servant-server left 2015-05-02 03:38:53 +01:00
Julian K. Arni
ed502f5f21 Prepare merge 2015-04-20 11:13:18 +02:00
Renamed from src/Servant/Server.hs (Browse further)