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Test switch_handler against all relevant REST callbacks
This commit is contained in:
Loïc Hoguin
parent
8c9ad7bf07
commit
06f9f3714f
2 changed files with 245 additions and 10 deletions
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@ -1,21 +1,163 @@
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-module(switch_handler_h).
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-export([init/2]).
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-export([allowed_methods/2]).
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-export([allow_missing_post/2]).
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-export([charsets_provided/2]).
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-export([content_types_accepted/2]).
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-export([content_types_provided/2]).
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-export([delete_completed/2]).
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-export([delete_resource/2]).
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-export([forbidden/2]).
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-export([is_authorized/2]).
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-export([is_conflict/2]).
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-export([known_methods/2]).
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-export([languages_provided/2]).
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-export([malformed_request/2]).
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-export([moved_permanently/2]).
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-export([moved_temporarily/2]).
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-export([multiple_choices/2]).
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-export([options/2]).
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-export([previously_existed/2]).
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-export([rate_limited/2]).
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-export([resource_exists/2]).
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-export([service_available/2]).
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-export([uri_too_long/2]).
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-export([valid_content_headers/2]).
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-export([valid_entity_length/2]).
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-export([accept/2]).
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-export([provide/2]).
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-export([info/3]).
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init(Req, State) ->
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{cowboy_rest, Req, State}.
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content_types_provided(Req, State) ->
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{[{<<"text/plain">>, provide}], Req, State}.
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allowed_methods(Req, State) ->
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maybe_switch_handler(Req, State, ?FUNCTION_NAME).
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provide(Req0, run) ->
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allow_missing_post(Req, State) ->
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maybe_switch_handler(Req, State, ?FUNCTION_NAME).
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charsets_provided(Req, State) ->
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maybe_switch_handler(Req, State, ?FUNCTION_NAME).
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content_types_accepted(Req, State) ->
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maybe_switch_handler(Req, State, ?FUNCTION_NAME).
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content_types_provided(Req, State) ->
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maybe_switch_handler(Req, State, ?FUNCTION_NAME).
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delete_completed(Req, State) ->
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maybe_switch_handler(Req, State, ?FUNCTION_NAME).
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delete_resource(Req, State) ->
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maybe_switch_handler(Req, State, ?FUNCTION_NAME).
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forbidden(Req, State) ->
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maybe_switch_handler(Req, State, ?FUNCTION_NAME).
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is_authorized(Req, State) ->
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maybe_switch_handler(Req, State, ?FUNCTION_NAME).
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is_conflict(Req, State) ->
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maybe_switch_handler(Req, State, ?FUNCTION_NAME).
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known_methods(Req, State) ->
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maybe_switch_handler(Req, State, ?FUNCTION_NAME).
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languages_provided(Req, State) ->
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maybe_switch_handler(Req, State, ?FUNCTION_NAME).
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malformed_request(Req, State) ->
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maybe_switch_handler(Req, State, ?FUNCTION_NAME).
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moved_permanently(Req, State) ->
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maybe_switch_handler(Req, State, ?FUNCTION_NAME).
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moved_temporarily(Req, State) ->
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maybe_switch_handler(Req, State, ?FUNCTION_NAME).
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multiple_choices(Req, State) ->
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maybe_switch_handler(Req, State, ?FUNCTION_NAME).
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options(Req, State) ->
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maybe_switch_handler(Req, State, ?FUNCTION_NAME).
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previously_existed(Req, State) ->
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maybe_switch_handler(Req, State, ?FUNCTION_NAME).
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rate_limited(Req, State) ->
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maybe_switch_handler(Req, State, ?FUNCTION_NAME).
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resource_exists(Req, State) ->
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maybe_switch_handler(Req, State, ?FUNCTION_NAME).
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service_available(Req, State) ->
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maybe_switch_handler(Req, State, ?FUNCTION_NAME).
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uri_too_long(Req, State) ->
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maybe_switch_handler(Req, State, ?FUNCTION_NAME).
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valid_content_headers(Req, State) ->
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maybe_switch_handler(Req, State, ?FUNCTION_NAME).
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valid_entity_length(Req, State) ->
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maybe_switch_handler(Req, State, ?FUNCTION_NAME).
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accept(Req, State) ->
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maybe_switch_handler(Req, State, ?FUNCTION_NAME).
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provide(Req, State) ->
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maybe_switch_handler(Req, State, ?FUNCTION_NAME).
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maybe_switch_handler(Req=#{qs := Qs}, State, StateName) ->
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case atom_to_binary(StateName, latin1) of
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Qs -> do_switch_handler(Req, State);
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_ -> do_default(Req, State, StateName)
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end.
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%% These are all the methods necessary to reach all callbacks.
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do_default(Req, State, allowed_methods) ->
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{[<<"GET">>, <<"POST">>, <<"PUT">>, <<"DELETE">>, <<"OPTIONS">>], Req, State};
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%% We need to accept/provide media types to reach these callbacks.
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do_default(Req, State, content_types_accepted) ->
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{[{<<"text/plain">>, accept}], Req, State};
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do_default(Req, State, content_types_provided) ->
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{[{<<"text/plain">>, provide}], Req, State};
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%% We need resource_exists to return false to reach these callbacks.
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do_default(Req=#{qs := <<"allow_missing_post">>}, State, resource_exists) ->
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{false, Req, State};
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do_default(Req=#{qs := <<"moved_permanently">>}, State, resource_exists) ->
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{false, Req, State};
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do_default(Req=#{qs := <<"moved_temporarily">>}, State, resource_exists) ->
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{false, Req, State};
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do_default(Req=#{qs := <<"previously_existed">>}, State, resource_exists) ->
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{false, Req, State};
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%% We need previously_existed to return true to reach these callbacks.
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do_default(Req=#{qs := <<"moved_permanently">>}, State, previously_existed) ->
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{true, Req, State};
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do_default(Req=#{qs := <<"moved_temporarily">>}, State, previously_existed) ->
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{true, Req, State};
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%% We need the DELETE to suceed to reach this callback.
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do_default(Req=#{qs := <<"delete_completed">>}, State, delete_resource) ->
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{true, Req, State};
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%% We should never reach these two callbacks.
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do_default(Req, State, accept) ->
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{false, Req, State};
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do_default(Req, State, provide) ->
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{<<"This is REST!">>, Req, State};
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%% Simulate the callback being missing in any other cases.
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do_default(_, _, _) ->
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no_call.
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do_switch_handler(Req0, run) ->
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Req = cowboy_req:stream_reply(200, Req0),
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send_after(0),
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{{switch_handler, cowboy_loop}, Req, 0};
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provide(Req0, hibernate) ->
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do_switch_handler(Req0, hibernate) ->
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Req = cowboy_req:stream_reply(200, Req0),
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send_after(0),
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{{switch_handler, cowboy_loop, hibernate}, Req, 0}.
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@ -313,19 +313,112 @@ rate_not_limited(Config) ->
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{response, nofin, 200, _} = gun:await(ConnPid, Ref),
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ok.
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switch_handler(Config) ->
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doc("Switch REST to loop handler for streaming the response body."),
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switch_handler_allowed_methods(Config) ->
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do_no_body_switch_handler(Config, get, ?FUNCTION_NAME).
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switch_handler_allow_missing_post(Config) ->
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do_req_body_switch_handler(Config, post, ?FUNCTION_NAME).
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switch_handler_charsets_provided(Config) ->
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do_no_body_switch_handler(Config, get, ?FUNCTION_NAME).
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switch_handler_content_types_accepted(Config) ->
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do_req_body_switch_handler(Config, post, ?FUNCTION_NAME).
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switch_handler_content_types_provided(Config) ->
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do_no_body_switch_handler(Config, get, ?FUNCTION_NAME).
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switch_handler_delete_completed(Config) ->
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do_no_body_switch_handler(Config, delete, ?FUNCTION_NAME).
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switch_handler_delete_resource(Config) ->
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do_no_body_switch_handler(Config, delete, ?FUNCTION_NAME).
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switch_handler_forbidden(Config) ->
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do_no_body_switch_handler(Config, get, ?FUNCTION_NAME).
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switch_handler_is_authorized(Config) ->
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do_no_body_switch_handler(Config, get, ?FUNCTION_NAME).
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switch_handler_is_conflict(Config) ->
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do_req_body_switch_handler(Config, put, ?FUNCTION_NAME).
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switch_handler_known_methods(Config) ->
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do_no_body_switch_handler(Config, get, ?FUNCTION_NAME).
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switch_handler_languages_provided(Config) ->
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do_no_body_switch_handler(Config, get, ?FUNCTION_NAME).
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switch_handler_malformed_request(Config) ->
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do_no_body_switch_handler(Config, get, ?FUNCTION_NAME).
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switch_handler_moved_permanently(Config) ->
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do_no_body_switch_handler(Config, get, ?FUNCTION_NAME).
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switch_handler_moved_temporarily(Config) ->
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do_no_body_switch_handler(Config, get, ?FUNCTION_NAME).
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switch_handler_multiple_choices(Config) ->
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do_no_body_switch_handler(Config, get, ?FUNCTION_NAME).
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switch_handler_options(Config) ->
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do_no_body_switch_handler(Config, options, ?FUNCTION_NAME).
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switch_handler_previously_existed(Config) ->
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do_no_body_switch_handler(Config, get, ?FUNCTION_NAME).
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switch_handler_rate_limited(Config) ->
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do_no_body_switch_handler(Config, get, ?FUNCTION_NAME).
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switch_handler_resource_exists(Config) ->
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do_no_body_switch_handler(Config, get, ?FUNCTION_NAME).
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switch_handler_service_available(Config) ->
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do_no_body_switch_handler(Config, get, ?FUNCTION_NAME).
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switch_handler_uri_too_long(Config) ->
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do_no_body_switch_handler(Config, get, ?FUNCTION_NAME).
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switch_handler_valid_content_headers(Config) ->
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do_no_body_switch_handler(Config, get, ?FUNCTION_NAME).
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switch_handler_valid_entity_length(Config) ->
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do_no_body_switch_handler(Config, get, ?FUNCTION_NAME).
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switch_handler_accept(Config) ->
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do_req_body_switch_handler(Config, post, ?FUNCTION_NAME).
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switch_handler_provide(Config) ->
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do_no_body_switch_handler(Config, get, ?FUNCTION_NAME).
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do_no_body_switch_handler(Config, Method, StateName0) ->
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doc("Switch REST to loop handler for streaming the response body, "
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"with and without options."),
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"switch_handler_" ++ StateName = atom_to_list(StateName0),
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do_no_body_switch_handler1(Config, Method, "/switch_handler?" ++ StateName),
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do_no_body_switch_handler1(Config, Method, "/switch_handler_opts?" ++ StateName).
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do_no_body_switch_handler1(Config, Method, Path) ->
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ConnPid = gun_open(Config),
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Ref = gun:get(ConnPid, "/switch_handler", [{<<"accept-encoding">>, <<"gzip">>}]),
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Ref = gun:Method(ConnPid, Path, [{<<"accept-encoding">>, <<"gzip">>}]),
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{response, nofin, 200, Headers} = gun:await(ConnPid, Ref),
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{ok, Body} = gun:await_body(ConnPid, Ref),
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<<"Hello\nstreamed\nworld!\n">> = do_decode(Headers, Body),
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ok.
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switch_handler_opts(Config) ->
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doc("Switch REST to loop handler for streaming the response body; with options."),
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do_req_body_switch_handler(Config, Method, StateName0) ->
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doc("Switch REST to loop handler for streaming the response body, "
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"with and without options."),
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"switch_handler_" ++ StateName = atom_to_list(StateName0),
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do_req_body_switch_handler1(Config, Method, "/switch_handler?" ++ StateName),
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do_req_body_switch_handler1(Config, Method, "/switch_handler_opts?" ++ StateName).
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do_req_body_switch_handler1(Config, Method, Path) ->
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ConnPid = gun_open(Config),
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Ref = gun:get(ConnPid, "/switch_handler_opts", [{<<"accept-encoding">>, <<"gzip">>}]),
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Ref = gun:Method(ConnPid, Path, [
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{<<"accept-encoding">>, <<"gzip">>},
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{<<"content-type">>, <<"text/plain">>}
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], <<"Hocus PocuSwitch!">>),
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{response, nofin, 200, Headers} = gun:await(ConnPid, Ref),
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{ok, Body} = gun:await_body(ConnPid, Ref),
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<<"Hello\nstreamed\nworld!\n">> = do_decode(Headers, Body),
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