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Remove the broken examples
Hooks are gone, and we won't be able to stream body in REST in Cowboy 2.0-rc.1, and might not in 2.0 either. That is, other than via halting the processing.
This commit is contained in:
Loïc Hoguin
parent
b5e43527df
commit
e7a65406a7
11 changed files with 0 additions and 299 deletions
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@ -1,8 +0,0 @@
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PROJECT = error_hook
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PROJECT_DESCRIPTION = Cowboy error handler example
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PROJECT_VERSION = 1
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DEPS = cowboy
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dep_cowboy_commit = master
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include ../../erlang.mk
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@ -1,49 +0,0 @@
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= Error hook example
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*This example is currently broken on master.*
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To try this example, you need GNU `make` and `git` in your PATH.
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To build and run the example, use the following command:
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[source,bash]
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$ make run
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Then point your browser to http://localhost:8080
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== Example output
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Not found:
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[source,bash]
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----
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$ curl -i http://localhost:8080
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HTTP/1.1 404 Not Found
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connection: keep-alive
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server: Cowboy
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date: Wed, 27 Feb 2013 23:32:55 GMT
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content-length: 56
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404 Not Found: "/" is not the path you are looking for.
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----
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Bad request:
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[source,bash]
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----
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$ telnet localhost 8080
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Trying ::1...
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Connection failed: Connection refused
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Trying 127.0.0.1...
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Connected to localhost.
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Escape character is '^]'.
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bad
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HTTP/1.1 400 Bad Request
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connection: close
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server: Cowboy
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date: Sun, 08 Sep 2013 09:29:27 GMT
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content-length: 15
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HTTP Error 400
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Connection closed by foreign host.
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----
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@ -1,2 +0,0 @@
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{release, {error_hook_example, "1"}, [error_hook]}.
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{extended_start_script, true}.
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@ -1,39 +0,0 @@
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%% Feel free to use, reuse and abuse the code in this file.
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%% @private
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-module(error_hook_app).
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-behaviour(application).
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%% API.
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-export([start/2]).
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-export([stop/1]).
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%% API.
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start(_Type, _Args) ->
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Dispatch = cowboy_router:compile([
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{'_', []}
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]),
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{ok, _} = cowboy:start_http(http, 100, [{port, 8080}], [
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{env, [{dispatch, Dispatch}]},
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{onresponse, fun error_hook/4}
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]),
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error_hook_sup:start_link().
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stop(_State) ->
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ok.
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error_hook(404, Headers, <<>>, Req) ->
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Path = cowboy_req:path(Req),
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Body = ["404 Not Found: \"", Path,
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"\" is not the path you are looking for.\n"],
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Headers2 = lists:keyreplace(<<"content-length">>, 1, Headers,
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{<<"content-length">>, integer_to_list(iolist_size(Body))}),
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cowboy_req:reply(404, Headers2, Body, Req);
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error_hook(Code, Headers, <<>>, Req) when is_integer(Code), Code >= 400 ->
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Body = ["HTTP Error ", integer_to_list(Code), $\n],
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Headers2 = lists:keyreplace(<<"content-length">>, 1, Headers,
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{<<"content-length">>, integer_to_list(iolist_size(Body))}),
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cowboy_req:reply(Code, Headers2, Body, Req);
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error_hook(_Code, _Headers, _Body, Req) ->
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Req.
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@ -1,23 +0,0 @@
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%% Feel free to use, reuse and abuse the code in this file.
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%% @private
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-module(error_hook_sup).
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-behaviour(supervisor).
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%% API.
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-export([start_link/0]).
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%% supervisor.
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-export([init/1]).
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%% API.
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-spec start_link() -> {ok, pid()}.
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start_link() ->
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supervisor:start_link({local, ?MODULE}, ?MODULE, []).
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%% supervisor.
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init([]) ->
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Procs = [],
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{ok, {{one_for_one, 10, 10}, Procs}}.
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@ -1,8 +0,0 @@
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PROJECT = rest_stream_response
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PROJECT_DESCRIPTION = Cowboy REST example with streaming
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PROJECT_VERSION = 1
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DEPS = cowboy
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dep_cowboy_commit = master
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include ../../erlang.mk
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@ -1,69 +0,0 @@
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= REST streaming example
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*This example is currently broken on master.*
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To try this example, you need GNU `make` and `git` in your PATH.
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To build and run the example, use the following command:
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[source,bash]
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$ make run
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Then point your browser to http://localhost:8080
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== About
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This example simulates streaming a large amount of data from a data store one
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record at a time in CSV format. It also uses a constraint to ensure that the
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last segment of the route is an integer.
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== Example output
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Fetch records with the second field with value 1:
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[source,bash]
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----
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$ curl -i localhost:8080
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HTTP/1.1 200 OK
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transfer-encoding: identity
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server: Cowboy
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date: Sun, 10 Feb 2013 19:32:16 GMT
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connection: close
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content-type: text/csv
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DBUZGQ0C,1,28
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BgoQAxMV,1,6
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DAYEFxER,1,18
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...
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----
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Fetch records with the second field with value 4:
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[source,bash]
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----
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$ curl -i localhost:8080/4
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HTTP/1.1 200 OK
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transfer-encoding: identity
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server: Cowboy
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date: Sun, 10 Feb 2013 19:34:31 GMT
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connection: close
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content-type: text/csv
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ABcFDxcE,4,42
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DgYQCgEE,4,5
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CA8BBhYD,4,10
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...
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----
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Fail to use a proper integer and get an error:
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[source,bash]
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----
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$ curl -i localhost:8080/foo
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HTTP/1.1 404 Not Found
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connection: keep-alive
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server: Cowboy
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date: Sun, 10 Feb 2013 19:36:16 GMT
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content-length: 0
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----
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@ -1,2 +0,0 @@
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{release, {rest_stream_response_example, "1"}, [rest_stream_response]}.
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{extended_start_script, true}.
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@ -1,39 +0,0 @@
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%% Feel free to use, reuse and abuse the code in this file.
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%% @private
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-module(rest_stream_response_app).
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-behaviour(application).
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%% API.
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-export([start/2]).
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-export([stop/1]).
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%% API.
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start(_Type, _Args) ->
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Table = ets:new(stream_tab, []),
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generate_rows(Table, 1000),
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Dispatch = cowboy_router:compile([
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{'_', [
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{"/[:v1]", [{v1, int}], toppage_handler, Table}
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]}
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]),
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{ok, _} = cowboy:start_http(http, 100, [{port, 8080}], [
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{env, [{dispatch, Dispatch}]}
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]),
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rest_stream_response_sup:start_link().
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stop(_State) ->
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ok.
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generate_rows(_Table, 0) ->
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ok;
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generate_rows(Table, N) ->
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ets:insert(Table, {key(), val(), val()}),
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generate_rows(Table, N - 1).
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key() -> key(10).
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key(N) -> key(<< (random:uniform(26) - 1) >>, N - 1).
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key(Acc, 0) -> binary_part(base64:encode(Acc), 0, 8);
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key(Acc, N) -> key(<< Acc/binary, (random:uniform(26) - 1) >>, N - 1).
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val() -> random:uniform(50).
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%% Feel free to use, reuse and abuse the code in this file.
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%% @private
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-module(rest_stream_response_sup).
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-behaviour(supervisor).
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%% API.
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-export([start_link/0]).
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%% supervisor.
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-export([init/1]).
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%% API.
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-spec start_link() -> {ok, pid()}.
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start_link() ->
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supervisor:start_link({local, ?MODULE}, ?MODULE, []).
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%% supervisor.
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init([]) ->
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Procs = [],
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{ok, {{one_for_one, 10, 10}, Procs}}.
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@ -1,37 +0,0 @@
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%% Feel free to use, reuse and abuse the code in this file.
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%% @doc Streaming handler.
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-module(toppage_handler).
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-export([init/2]).
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-export([content_types_provided/2]).
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-export([streaming_csv/2]).
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init(Req, Table) ->
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{cowboy_rest, Req, Table}.
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content_types_provided(Req, State) ->
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{[
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{{<<"text">>, <<"csv">>, []}, streaming_csv}
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], Req, State}.
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streaming_csv(Req, Table) ->
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N = cowboy_req:binding(v1, Req, 1),
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MS = [{{'$1', '$2', '$3'}, [{'==', '$2', N}], ['$$']}],
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{{stream, result_streamer(Table, MS)}, Req, Table}.
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result_streamer(Table, MS) ->
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fun (Socket, Transport) ->
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send_records(Socket, Transport, ets:select(Table, MS, 1))
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end.
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send_records(Socket, Transport, {[Rec], Cont}) ->
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timer:sleep(500),
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send_line(Socket, Transport, Rec),
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send_records(Socket, Transport, ets:select(Cont));
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send_records(_Socket, _Transport, '$end_of_table') ->
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ok.
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send_line(Socket, Transport, [Key, V1, V2]) ->
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Transport:send(Socket,
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[Key, $,, integer_to_list(V1), $,, integer_to_list(V2), $\r, $\n]).
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