Add support for range requests (RFC7233) in cowboy_rest

This is currently undocumented but is planned to be documented
in the next version.

1 files changed, 39 insertions, 0 deletions

diff --git a/test/handlers/range_satisfiable_h.erl b/test/handlers/range_satisfiable_h.erl
new file mode 100644
index 0000000..357c30e
--- /dev/null
+++ b/test/handlers/range_satisfiable_h.erl
@@ -0,0 +1,39 @@
+%% This module defines the range_satisfiable callback
+%% and return something different depending on query string.
+
+-module(range_satisfiable_h).
+
+-export([init/2]).
+-export([content_types_provided/2]).
+-export([ranges_provided/2]).
+-export([range_satisfiable/2]).
+-export([get_text_plain/2]).
+-export([get_text_plain_bytes/2]).
+
+init(Req, State) ->
+	{cowboy_rest, Req, State}.
+
+content_types_provided(Req, State) ->
+	{[{{<<"text">>, <<"plain">>, []}, get_text_plain}], Req, State}.
+
+ranges_provided(Req, State) ->
+	{[{<<"bytes">>, get_text_plain_bytes}], Req, State}.
+
+%% Simulate the callback being missing, otherwise expect true/false.
+range_satisfiable(#{qs := <<"missing">>}, _) ->
+	no_call;
+range_satisfiable(Req=#{qs := <<"false-int">>}, State) ->
+	{{false, 123}, Req, State};
+range_satisfiable(Req=#{qs := <<"false-bin">>}, State) ->
+	{{false, <<"*/456">>}, Req, State};
+range_satisfiable(Req=#{qs := Qs}, State) ->
+	{Qs =:= <<"true">>, Req, State}.
+
+get_text_plain(Req, State) ->
+	{<<"This is REST!">>, Req, State}.
+
+get_text_plain_bytes(Req, State) ->
+	%% We send everything in one part, since we are not testing
+	%% this callback specifically.
+	Body = <<"This is ranged REST!">>,
+	{[{{0, byte_size(Body) - 1, byte_size(Body)}, Body}], Req, State}.