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author | josh rotenberg <[email protected]> | 2013-11-17 15:47:35 -0800 |
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committer | josh rotenberg <[email protected]> | 2013-12-04 14:44:53 -0800 |
commit | 88209ea02ea71fd8c028e76f9bf7aedbf0dfdd55 (patch) | |
tree | 3139b2d57c6552d1b38d1792ce4a644bf8590628 /examples | |
parent | 6a5015fedd0f85388144de7b8a6ed7d883da5e1a (diff) | |
download | ranch-88209ea02ea71fd8c028e76f9bf7aedbf0dfdd55.tar.gz ranch-88209ea02ea71fd8c028e76f9bf7aedbf0dfdd55.tar.bz2 ranch-88209ea02ea71fd8c028e76f9bf7aedbf0dfdd55.zip |
Add example using gen_server
Diffstat (limited to 'examples')
-rw-r--r-- | examples/tcp_reverse/Makefile | 6 | ||||
-rw-r--r-- | examples/tcp_reverse/README.md | 29 | ||||
-rw-r--r-- | examples/tcp_reverse/relx.config | 2 | ||||
-rw-r--r-- | examples/tcp_reverse/src/reverse_protocol.erl | 61 | ||||
-rw-r--r-- | examples/tcp_reverse/src/tcp_reverse.app.src | 15 | ||||
-rw-r--r-- | examples/tcp_reverse/src/tcp_reverse.erl | 13 | ||||
-rw-r--r-- | examples/tcp_reverse/src/tcp_reverse_app.erl | 19 | ||||
-rw-r--r-- | examples/tcp_reverse/src/tcp_reverse_sup.erl | 22 |
8 files changed, 167 insertions, 0 deletions
diff --git a/examples/tcp_reverse/Makefile b/examples/tcp_reverse/Makefile new file mode 100644 index 0000000..f56d051 --- /dev/null +++ b/examples/tcp_reverse/Makefile @@ -0,0 +1,6 @@ +PROJECT = tcp_reverse + +DEPS = ranch +dep_ranch = pkg://ranch 0.9.0 + +include ../../erlang.mk diff --git a/examples/tcp_reverse/README.md b/examples/tcp_reverse/README.md new file mode 100644 index 0000000..c73ae60 --- /dev/null +++ b/examples/tcp_reverse/README.md @@ -0,0 +1,29 @@ +Ranch TCP Reverse +================= + +This example uses a gen_server to handle a protocol to revese input. See +reverse_protocol.erl for the implementation, and documentation at +the following URL: + +http://ninenines.eu/docs/en/ranch/HEAD/guide/protocols/#using_gen_server + +To build the example: +``` bash +$ make +``` + +To start the release in the foreground: + +``` bash +$ ./_rel/bin/tcp_reverse_example console +``` + +Then start a telnet session to port 5555: +``` bash +$ telnet localhost 5555 +``` + +Type in a few words and see them reversed! Amazing! + +Be aware that there is a timeout of 5 seconds without receiving +data before the example server disconnects your session. diff --git a/examples/tcp_reverse/relx.config b/examples/tcp_reverse/relx.config new file mode 100644 index 0000000..2a83916 --- /dev/null +++ b/examples/tcp_reverse/relx.config @@ -0,0 +1,2 @@ +{release, {tcp_reverse_example, "1"}, [tcp_reverse]}. +{extended_start_script, true}. diff --git a/examples/tcp_reverse/src/reverse_protocol.erl b/examples/tcp_reverse/src/reverse_protocol.erl new file mode 100644 index 0000000..ea28d4e --- /dev/null +++ b/examples/tcp_reverse/src/reverse_protocol.erl @@ -0,0 +1,61 @@ +%% Feel free to use, reuse and abuse the code in this file. + +-module(reverse_protocol). + +-behaviour(gen_server). +-behaviour(ranch_protocol). + +-export([start_link/4]). + +-export([init/1, init/4, handle_call/3, handle_cast/2, handle_info/2, + terminate/2, code_change/3]). + +-export([reverse_binary/1]). + +-define(TIMEOUT, 5000). + +-record(state, {socket, transport}). + +reverse_binary(B) when is_binary(B) -> + [list_to_binary( + lists:reverse( + binary_to_list(binary:part(B, {0, byte_size(B)-2})))), + "\r\n"]. + +start_link(Ref, Socket, Transport, Opts) -> + proc_lib:start_link(?MODULE, init, [Ref, Socket, Transport, Opts]). + +init(Args) -> + {ok, Args}. + +init(Ref, Socket, Transport, _Opts = []) -> + ok = proc_lib:init_ack({ok, self()}), + ok = ranch:accept_ack(Ref), + ok = Transport:setopts(Socket, [{active, once}]), + gen_server:enter_loop(?MODULE,[], {state, Socket, Transport},?TIMEOUT). + +handle_info({tcp, Socket, Data}, #state{transport = Transport} = State) -> + inet:setopts(State#state.socket, [{active, once}]), + Transport:send(Socket, reverse_binary(Data)), + {noreply, State, ?TIMEOUT}; +handle_info({tcp_closed, _Socket}, State) -> + {stop, normal, State}; +handle_info({tcp_error, _, Reason}, State) -> + {stop, Reason, State}; +handle_info(timeout, State) -> + {stop, normal, State}; +handle_info(_Info, State) -> + {stop, normal, State}. + +handle_call(_Request, _From, State) -> + {reply, ok, State}. + +handle_cast(_Msg, State) -> + {noreply, State}. + +terminate(_Reason, _State) -> + ok. + +code_change(_OldVsn, State, _Extra) -> + {ok, State}. + diff --git a/examples/tcp_reverse/src/tcp_reverse.app.src b/examples/tcp_reverse/src/tcp_reverse.app.src new file mode 100644 index 0000000..900b400 --- /dev/null +++ b/examples/tcp_reverse/src/tcp_reverse.app.src @@ -0,0 +1,15 @@ +%% Feel free to use, reuse and abuse the code in this file. + +{application, tcp_reverse, [ + {description, "Ranch TCP Reverse example."}, + {vsn, "1"}, + {modules, []}, + {registered, [tcp_reverse_sup]}, + {applications, [ + kernel, + stdlib, + ranch + ]}, + {mod, {tcp_reverse_app, []}}, + {env, []} +]}. diff --git a/examples/tcp_reverse/src/tcp_reverse.erl b/examples/tcp_reverse/src/tcp_reverse.erl new file mode 100644 index 0000000..e20f170 --- /dev/null +++ b/examples/tcp_reverse/src/tcp_reverse.erl @@ -0,0 +1,13 @@ +%% Feel free to use, reuse and abuse the code in this file. + +-module(tcp_reverse). + +%% API. +-export([start/0]). + +%% API. + +start() -> + io:format("starting ranch and tcp_reverse~n"), + ok = application:start(ranch), + ok = application:start(tcp_reverse). diff --git a/examples/tcp_reverse/src/tcp_reverse_app.erl b/examples/tcp_reverse/src/tcp_reverse_app.erl new file mode 100644 index 0000000..49a5349 --- /dev/null +++ b/examples/tcp_reverse/src/tcp_reverse_app.erl @@ -0,0 +1,19 @@ +%% Feel free to use, reuse and abuse the code in this file. + +%% @private +-module(tcp_reverse_app). +-behaviour(application). + +%% API. +-export([start/2]). +-export([stop/1]). + +%% API. + +start(_Type, _Args) -> + {ok, _} = ranch:start_listener(tcp_reverse, 10, + ranch_tcp, [{port, 5555}], reverse_protocol, []), + tcp_reverse_sup:start_link(). + +stop(_State) -> + ok. diff --git a/examples/tcp_reverse/src/tcp_reverse_sup.erl b/examples/tcp_reverse/src/tcp_reverse_sup.erl new file mode 100644 index 0000000..4264d18 --- /dev/null +++ b/examples/tcp_reverse/src/tcp_reverse_sup.erl @@ -0,0 +1,22 @@ +%% Feel free to use, reuse and abuse the code in this file. + +%% @private +-module(tcp_reverse_sup). +-behaviour(supervisor). + +%% API. +-export([start_link/0]). + +%% supervisor. +-export([init/1]). + +%% API. + +-spec start_link() -> {ok, pid()}. +start_link() -> + supervisor:start_link({local, ?MODULE}, ?MODULE, []). + +%% supervisor. + +init([]) -> + {ok, {{one_for_one, 10, 10}, []}}. |