1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
|
%% This module defines the ranges_provided callback
%% and return something different depending on query string.
-module(ranges_provided_h).
-export([init/2]).
-export([content_types_provided/2]).
-export([ranges_provided/2]).
-export([get_text_plain/2]).
init(Req, State) ->
{cowboy_rest, Req, State}.
content_types_provided(Req, State) ->
{[{{<<"text">>, <<"plain">>, []}, get_text_plain}], Req, State}.
ranges_provided(Req=#{qs := <<"list">>}, State) ->
{[
{<<"bytes">>, get_text_plain_bytes},
{<<"pages">>, get_text_plain_pages},
{<<"chapters">>, get_text_plain_chapters}
], Req, State};
ranges_provided(Req=#{qs := <<"none">>}, State) ->
{[], Req, State};
%% Simulate the callback being missing in other cases.
ranges_provided(_, _) ->
no_call.
get_text_plain(Req, State) ->
{<<"This is REST!">>, Req, State}.
|
