Move Haberdasher example under examples dir

6 files changed, 108 insertions, 0 deletions

diff --git a/examples/haberdasher/Makefile b/examples/haberdasher/Makefile
new file mode 100644
index 0000000..309144f
--- /dev/null
+++ b/examples/haberdasher/Makefile
@@ -0,0 +1,10 @@
+all: haberdasherserver haberdasherclient
+
+haberdasherserver: haberdasherserver.nim service_pb.nim service_twirp.nim
+	nim c haberdasherserver.nim
+
+haberdasherclient: haberdasherclient.nim service_pb.nim service_twirp.nim
+	nim c haberdasherclient.nim
+
+%_pb.nim %_twirp.nim: %.proto
+	../../nimtwirp/nimtwirp_build -I:. --out:. $^
diff --git a/examples/haberdasher/README.md b/examples/haberdasher/README.md
new file mode 100644
index 0000000..acdee60
--- /dev/null
+++ b/examples/haberdasher/README.md
@@ -0,0 +1,3 @@
+# Nimtwirp usage example
+
+This example is basically stolen from [twirp](https://twitchtv.github.io/twirp/docs/example.html).
diff --git a/examples/haberdasher/haberdasherclient.nim b/examples/haberdasher/haberdasherclient.nim
new file mode 100644
index 0000000..d402356
--- /dev/null
+++ b/examples/haberdasher/haberdasherclient.nim
@@ -0,0 +1,25 @@
+import os
+import strformat
+import strutils
+
+import service_pb
+import service_twirp
+
+if paramCount() != 1:
+    echo("usage: " & getAppFilename() & " <size>")
+    quit(QuitFailure)
+
+var size = newtwirp_example_haberdasher_Size()
+try:
+    size.inches = parseInt(paramStr(1)).int32
+except:
+    echo("invalid size")
+    quit(QuitFailure)
+
+let client = newHaberdasherClient("http://localhost:8080")
+
+try:
+    let hat = MakeHat(client, size)
+    echo(&"I have a nice new hat: {hat.inches} inch {hat.color} {hat.name}")
+except Exception as exc:
+    echo(&"oh no: {exc.msg}")
diff --git a/examples/haberdasher/haberdasherserver.nim b/examples/haberdasher/haberdasherserver.nim
new file mode 100644
index 0000000..cdb25cb
--- /dev/null
+++ b/examples/haberdasher/haberdasherserver.nim
@@ -0,0 +1,47 @@
+import asynchttpserver
+import asyncdispatch
+import random
+
+import nimtwirp/nimtwirp
+import nimtwirp/errors
+
+import service_pb
+import service_twirp
+
+proc MakeHatImpl(service: Haberdasher, size: twirp_example_haberdasher_Size): Future[twirp_example_haberdasher_Hat] {.async.} =
+    if size.inches <= 0:
+        raise newTwirpError(TwirpInvalidArgument, "I can't make a hat that small!")
+
+    result = newtwirp_example_haberdasher_Hat()
+    result.inches = size.inches
+    result.color = rand(["white", "black", "brown", "red", "blue"])
+    result.name = rand(["bowler", "baseball cap", "top hat", "derby"])
+
+# You can do serving this way if you want to customize the process a bit
+
+var
+    server = newAsyncHttpServer()
+    service {.threadvar.}: Haberdasher
+
+service = newHaberdasher()
+service.MakeHatImpl = MakeHatImpl
+
+proc handler(req: Request) {.async.} =
+    # Each service will have a generated handleRequest() proc which takes the
+    # service object and a asynchttpserver.Request object and returns a
+    # Future[nimtwirp.Response].
+    var fut = handleRequest(service, req)
+    yield fut
+    if fut.failed:
+        await respond(req, nimtwirp.newResponse(fut.readError()))
+    else:
+        await respond(req, fut.read())
+
+waitFor server.serve(Port(8080), handler)
+
+# Or this way (idea copied from Jester) if your needs are simple.
+#
+#var settings = newSettings(8080)
+#twirpServices(settings):
+#    service
+#runForever()
diff --git a/examples/haberdasher/nim.cfg b/examples/haberdasher/nim.cfg
new file mode 100644
index 0000000..e5cb567
--- /dev/null
+++ b/examples/haberdasher/nim.cfg
@@ -0,0 +1 @@
+--path="../.."
diff --git a/examples/haberdasher/service.proto b/examples/haberdasher/service.proto
new file mode 100644
index 0000000..1945a72
--- /dev/null
+++ b/examples/haberdasher/service.proto
@@ -0,0 +1,22 @@
+syntax = "proto3";
+
+package twirp.example.haberdasher;
+option go_package = "haberdasher";
+
+// Haberdasher service makes hats for clients.
+service Haberdasher {
+  // MakeHat produces a hat of mysterious, randomly-selected color!
+  rpc MakeHat(Size) returns (Hat);
+}
+
+// Size of a Hat, in inches.
+message Size {
+  int32 inches = 1; // must be > 0
+}
+
+// A Hat is a piece of headwear made by a Haberdasher.
+message Hat {
+  int32 inches = 1;
+  string color = 2; // anything but "invisible"
+  string name = 3; // i.e. "bowler"
+}