A bunch of changes

- use parseopt2 in nimtwirp_build
- define the prefix when running nimtwirp_build (defaults to `/twirp/`)
- add a TwirpResponse type
- replace concept with a type having callbacks for each rpc method (a la
  streams.nim)
- check that a request is a POST and that it has a correct Content-Type
- generate only a proc for handling the service, let the user handle responding
  to let them customize e.g. headers

2 files changed, 12 insertions, 7 deletions

diff --git a/example/Makefile b/example/Makefile
index 63da56f..74f6709 100644
--- a/example/Makefile
+++ b/example/Makefile
@@ -7,4 +7,4 @@ haberdasherclient: haberdasherclient.nim service_pb.nim service_twirp.nim
 	nim c haberdasherclient.nim
 
 %_pb.nim %_twirp.nim: %.proto
-	../nimtwirp/nimtwirp_build -I. --out=. $^
+	../nimtwirp/nimtwirp_build -I:. --out:. $^
diff --git a/example/haberdasherserver.nim b/example/haberdasherserver.nim
index a41c3b8..ba85e83 100644
--- a/example/haberdasherserver.nim
+++ b/example/haberdasherserver.nim
@@ -3,14 +3,12 @@ import asyncdispatch
 import random
 
 import nimtwirp/errors
+import nimtwirp/response
 
 import service_pb
 import service_twirp
 
-type
-    HaberdasherService = object
-
-proc MakeHat(x: HaberdasherService, size: twirp_example_haberdasher_Size): twirp_example_haberdasher_Hat =
+proc MakeHatImpl(service: Haberdasher, size: twirp_example_haberdasher_Size): twirp_example_haberdasher_Hat =
     if size.inches <= 0:
         raise newTwirpError(TwirpInvalidArgument, "I can't make a hat that small!")
 
@@ -21,6 +19,13 @@ proc MakeHat(x: HaberdasherService, size: twirp_example_haberdasher_Size): twirp
 
 var
     server = newAsyncHttpServer()
-    service: HaberdasherService
+    service {.threadvar.}: Haberdasher
+
+service = newHaberdasher()
+service.MakeHatImpl = MakeHatImpl
+
+proc cb(req: Request) {.async.} =
+    var resp = HaberdasherHandler(service, req)
+    await respond(req, resp)
 
-waitFor server.serve(Port(8080), HaberdasherServer(service, "/"))
+waitFor server.serve(Port(8080), cb)