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REST: Allow generate_etag to return undefined

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This allows conditionally generating an etag.
This commit is contained in:
Loïc Hoguin 2024-01-16 16:28:52 +01:00
parent ec12c2f051
commit defce46fdf
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4 changed files with 29 additions and 2 deletions
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3
test/handlers/generate_etag_h.erl
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@ -34,6 +34,9 @@ generate_etag(Req=#{qs := <<"binary-weak-unquoted">>}, State) ->
generate_etag(Req=#{qs := <<"binary-strong-unquoted">>}, State) ->
ct_helper_error_h:ignore(cow_http_hd, parse_etag, 1),
{<<"etag-header-value">>, Req, State};
%% Returning 'undefined' to indicate no etag.
generate_etag(Req=#{qs := <<"undefined">>}, State) ->
{undefined, Req, State};
%% Simulate the callback being missing in other cases.
generate_etag(#{qs := <<"missing">>}, _) ->
no_call.