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46 lines
1.4 KiB
Erlang
46 lines
1.4 KiB
Erlang
%% This module defines the ranges_provided callback
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%% and a generate_etag callback that returns something
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%% different depending on query string. It also defines
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%% a last_modified callback that must be ignored when a
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%% date is provided in if_range.
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-module(if_range_h).
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-export([init/2]).
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-export([content_types_provided/2]).
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-export([ranges_provided/2]).
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-export([generate_etag/2]).
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-export([last_modified/2]).
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-export([get_text_plain/2]).
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-export([get_text_plain_bytes/2]).
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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">>, []}, get_text_plain}], Req, State}.
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%% Simulate the callback being missing.
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ranges_provided(#{qs := <<"missing-ranges_provided">>}, _) ->
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no_call;
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ranges_provided(Req=#{qs := <<"empty-ranges_provided">>}, State) ->
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{[], Req, State};
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ranges_provided(Req, State) ->
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{[{<<"bytes">>, get_text_plain_bytes}], Req, State}.
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generate_etag(Req=#{qs := <<"weak-etag">>}, State) ->
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{{weak, <<"weak-no-match">>}, Req, State};
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generate_etag(Req, State) ->
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{{strong, <<"strong-and-match">>}, Req, State}.
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last_modified(Req, State) ->
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{{{2222, 2, 22}, {11, 11, 11}}, Req, State}.
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get_text_plain(Req, State) ->
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{<<"This is REST!">>, Req, State}.
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get_text_plain_bytes(Req, State) ->
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%% We send everything in one part, since we are not testing
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%% this callback specifically.
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Body = <<"This is ranged REST!">>,
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{[{{0, byte_size(Body) - 1, byte_size(Body)}, Body}], Req, State}.
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