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Cowboy Hello World | ||
================== | ||
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To compile this example you need rebar in your PATH. | ||
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Type the following command: | ||
``` | ||
$ rebar get-deps compile | ||
``` | ||
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You can then start the Erlang node with the following command: | ||
``` | ||
./start.sh | ||
``` | ||
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Then run any given command or point your browser to the indicated URL. |
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{deps, [ | ||
{cowboy, ".*", | ||
{git, "git://github.com/extend/cowboy.git", "master"}} | ||
]}. |
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%% Feel free to use, reuse and abuse the code in this file. | ||
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{application, rest_hello_world, [ | ||
{description, "Cowboy REST Hello World example."}, | ||
{vsn, "1"}, | ||
{modules, []}, | ||
{registered, []}, | ||
{applications, [ | ||
kernel, | ||
stdlib, | ||
cowboy | ||
]}, | ||
{mod, {rest_hello_world_app, []}}, | ||
{env, []} | ||
]}. |
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%% Feel free to use, reuse and abuse the code in this file. | ||
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-module(rest_hello_world). | ||
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%% API. | ||
-export([start/0]). | ||
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%% API. | ||
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start() -> | ||
ok = application:start(cowboy), | ||
ok = application:start(rest_hello_world). |
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%% Feel free to use, reuse and abuse the code in this file. | ||
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%% @private | ||
-module(rest_hello_world_app). | ||
-behaviour(application). | ||
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%% API. | ||
-export([start/2]). | ||
-export([stop/1]). | ||
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%% API. | ||
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start(_Type, _Args) -> | ||
Dispatch = [ | ||
{'_', [ | ||
{[], toppage_handler, []} | ||
]} | ||
], | ||
{ok, _} = cowboy:start_listener(http, 100, | ||
cowboy_tcp_transport, [{port, 8080}], | ||
cowboy_http_protocol, [{dispatch, Dispatch}] | ||
), | ||
rest_hello_world_sup:start_link(). | ||
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stop(_State) -> | ||
ok. |
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%% Feel free to use, reuse and abuse the code in this file. | ||
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%% @private | ||
-module(rest_hello_world_sup). | ||
-behaviour(supervisor). | ||
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%% API. | ||
-export([start_link/0]). | ||
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%% supervisor. | ||
-export([init/1]). | ||
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%% API. | ||
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-spec start_link() -> {ok, pid()}. | ||
start_link() -> | ||
supervisor:start_link({local, ?MODULE}, ?MODULE, []). | ||
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%% supervisor. | ||
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init([]) -> | ||
Procs = [], | ||
{ok, {{one_for_one, 10, 10}, Procs}}. |
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%% Feel free to use, reuse and abuse the code in this file. | ||
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%% @doc Hello world handler. | ||
-module(toppage_handler). | ||
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-export([init/3]). | ||
-export([content_types_provided/2]). | ||
-export([hello_to_html/2]). | ||
-export([hello_to_json/2]). | ||
-export([hello_to_text/2]). | ||
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init(_Transport, _Req, []) -> | ||
{upgrade, protocol, cowboy_http_rest}. | ||
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content_types_provided(Req, State) -> | ||
{[ | ||
{<<"text/html">>, hello_to_html}, | ||
{<<"application/json">>, hello_to_json}, | ||
{<<"text/plain">>, hello_to_text} | ||
], Req, State}. | ||
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hello_to_html(Req, State) -> | ||
Body = <<"<html> | ||
<head> | ||
<meta charset=\"utf-8\"> | ||
<title>REST Hello World!</title> | ||
</head> | ||
<body> | ||
<p>REST Hello World as HTML!</p> | ||
</body> | ||
</html>">>, | ||
{Body, Req, State}. | ||
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hello_to_json(Req, State) -> | ||
Body = <<"{\"rest\": \"Hello World!\"}">>, | ||
{Body, Req, State}. | ||
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hello_to_text(Req, State) -> | ||
{<<"REST Hello World as text!">>, Req, State}. |
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#!/bin/sh | ||
erl -pa ebin deps/*/ebin -s rest_hello_world \ | ||
-eval "io:format(\"Get HTML: curl -i http://localhost:8080~n\")." \ | ||
-eval "io:format(\"Get JSON: curl -i -H \\\"Accept: application/json\\\" http://localhost:8080~n\")." \ | ||
-eval "io:format(\"Get text: curl -i -H \\\"Accept: text/plain\\\" http://localhost:8080~n\")." \ | ||
-eval "io:format(\"Get a 406: curl -i -H \\\"Accept: text/css\\\" http://localhost:8080~n\")." |