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Add support for range requests (RFC7233) in cowboy_rest

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This is currently undocumented but is planned to be documented
in the next version.
This commit is contained in:
Loïc Hoguin 2018-11-07 18:55:06 +01:00
parent bdd324ec01
commit 29043aa7b4
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GPG key ID: 8A9DF795F6FED764
9 changed files with 745 additions and 9 deletions
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21
test/handlers/switch_handler_h.erl
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@ -22,6 +22,8 @@
-export([multiple_choices/2]).
-export([options/2]).
-export([previously_existed/2]).
-export([range_satisfiable/2]).
-export([ranges_provided/2]).
-export([rate_limited/2]).
-export([resource_exists/2]).
-export([service_available/2]).
@ -31,6 +33,7 @@
-export([accept/2]).
-export([provide/2]).
-export([provide_range/2]).
-export([info/3]).
@ -91,6 +94,12 @@ options(Req, State) ->
previously_existed(Req, State) ->
maybe_switch_handler(Req, State, ?FUNCTION_NAME).
range_satisfiable(Req, State) ->
maybe_switch_handler(Req, State, ?FUNCTION_NAME).
ranges_provided(Req, State) ->
maybe_switch_handler(Req, State, ?FUNCTION_NAME).
rate_limited(Req, State) ->
maybe_switch_handler(Req, State, ?FUNCTION_NAME).
@ -115,6 +124,9 @@ accept(Req, State) ->
provide(Req, State) ->
maybe_switch_handler(Req, State, ?FUNCTION_NAME).
provide_range(Req, State) ->
maybe_switch_handler(Req, State, ?FUNCTION_NAME).
maybe_switch_handler(Req=#{qs := Qs}, State, StateName) ->
case atom_to_binary(StateName, latin1) of
Qs -> do_switch_handler(Req, State);
@ -129,6 +141,11 @@ do_default(Req, State, content_types_accepted) ->
{[{<<"text/plain">>, accept}], Req, State};
do_default(Req, State, content_types_provided) ->
{[{<<"text/plain">>, provide}], Req, State};
%% We need to accept ranges to reach these callbacks.
do_default(Req=#{qs := <<"range_satisfiable">>}, State, ranges_provided) ->
{[{<<"bytes">>, provide_range}], Req, State};
do_default(Req=#{qs := <<"provide_range">>}, State, ranges_provided) ->
{[{<<"bytes">>, provide_range}], Req, State};
%% We need resource_exists to return false to reach these callbacks.
do_default(Req=#{qs := <<"allow_missing_post">>}, State, resource_exists) ->
{false, Req, State};
@ -146,11 +163,13 @@ do_default(Req=#{qs := <<"moved_temporarily">>}, State, previously_existed) ->
%% We need the DELETE to suceed to reach this callback.
do_default(Req=#{qs := <<"delete_completed">>}, State, delete_resource) ->
{true, Req, State};
%% We should never reach these two callbacks.
%% We should never reach these callbacks.
do_default(Req, State, accept) ->
{false, Req, State};
do_default(Req, State, provide) ->
{<<"This is REST!">>, Req, State};
do_default(Req, State, provide_range) ->
{<<"This is ranged REST!">>, Req, State};
%% Simulate the callback being missing in any other cases.
do_default(_, _, _) ->
no_call.