Convert the GET echo example to a release

examples/echo_get/Makefile

@@ -0,0 +1,14 @@
+PROJECT = echo_get
+
+DEPS = cowboy
+dep_cowboy = pkg://cowboy master
+
+.PHONY: release clean-release
+
+release: clean-release all
+	relx
+
+clean-release:
+	rm -rf _rel
+
+include ../../erlang.mk

examples/echo_get/README.md

@@ -1,23 +1,28 @@
-Cowboy GET Echo
-===============
+GET parameter echo example
+==========================
 
-To compile this example you need rebar in your PATH.
+To try this example, you need GNU `make`, `git` and
+[relx](https://github.com/erlware/relx) in your PATH.
 
-Type the following command:
-```
-$ rebar get-deps compile
-```
+To build the example, run the following command:
 
-You can then start the Erlang node with the following command:
+``` bash
+$ make
 ```
-./start.sh
+
+To start the release in the foreground:
+
+``` bash
+$ ./_rel/bin/get_echo_example console
 ```
 
-Then point your browser to the indicated URL. You can change
-the GET parameter to check that the handler is echoing properly.
+Then point your browser at
+[http://localhost:8080/?echo=hello](http://localhost:8080/?echo=hello).
+You can replace the `echo` parameter with another to check
+that the handler is echoing it back properly.
 
-Example
--------
+Example output
+--------------
 
 ``` bash
 $ curl -i "http://localhost:8080/?echo=saymyname"
@@ -26,7 +31,7 @@ connection: keep-alive
 server: Cowboy
 date: Fri, 28 Sep 2012 04:09:04 GMT
 content-length: 9
-Content-Encoding: utf-8
+content-type: text/plain; charset=utf-8
 
 saymyname
 ```

examples/echo_get/rebar.config

@@ -1,4 +0,0 @@
-{deps, [
-	{cowboy, ".*",
-		{git, "git://github.com/extend/cowboy.git", "master"}}
-]}.

examples/echo_get/relx.config

@@ -0,0 +1,2 @@
+{release, {echo_get_example, "1"}, [echo_get]}.
+{extended_start_script, true}.

examples/echo_get/src/echo_get.erl

@@ -1,15 +0,0 @@
-%% Feel free to use, reuse and abuse the code in this file.
-
--module(echo_get).
-
-%% API.
--export([start/0]).
-
-%% API.
-
-start() ->
-	ok = application:start(crypto),
-	ok = application:start(cowlib),
-	ok = application:start(ranch),
-	ok = application:start(cowboy),
-	ok = application:start(echo_get).

examples/echo_get/src/toppage_handler.erl

@@ -19,8 +19,9 @@ handle(Req, State) ->
 echo(<<"GET">>, undefined, Req) ->
 	cowboy_req:reply(400, [], <<"Missing echo parameter.">>, Req);
 echo(<<"GET">>, Echo, Req) ->
-	cowboy_req:reply(200,
-		[{<<"content-encoding">>, <<"utf-8">>}], Echo, Req);
+	cowboy_req:reply(200, [
+		{<<"content-type">>, <<"text/plain; charset=utf-8">>}
+	], Echo, Req);
 echo(_, _, Req) ->
 	%% Method not allowed.
 	cowboy_req:reply(405, Req).

examples/echo_get/start.sh

@@ -1,3 +0,0 @@
-#!/bin/sh
-erl -pa ebin deps/*/ebin -s echo_get \
-	-eval "io:format(\"Point your browser at http://localhost:8080/?echo=test~n\")."