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Don't crash in delete_resp_header if no resp headers are set

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Loïc Hoguin 2018-01-22 14:00:05 +01:00
parent 82cd22a88b
commit 3a7b411143
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2 changed files with 11 additions and 5 deletions
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5
src/cowboy_req.erl
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@ -688,7 +688,10 @@ has_resp_body(_) ->
-spec delete_resp_header(binary(), Req)
-> Req when Req::req().
delete_resp_header(Name, Req=#{resp_headers := RespHeaders}) ->
Req#{resp_headers => maps:remove(Name, RespHeaders)}.
Req#{resp_headers => maps:remove(Name, RespHeaders)};
%% There are no resp headers so we have nothing to delete.
delete_resp_header(Name, Req) ->
Req.
-spec inform(cowboy:http_status(), req()) -> ok.
inform(Status, Req) ->

11
test/handlers/resp_h.erl
View file

@ -94,10 +94,13 @@ do(<<"has_resp_body">>, Req0, Opts) ->
{ok, cowboy_req:reply(200, #{}, Req), Opts}
end;
do(<<"delete_resp_header">>, Req0, Opts) ->
false = cowboy_req:has_resp_header(<<"content-type">>, Req0),
Req1 = cowboy_req:set_resp_header(<<"content-type">>, <<"text/plain">>, Req0),
true = cowboy_req:has_resp_header(<<"content-type">>, Req1),
Req = cowboy_req:delete_resp_header(<<"content-type">>, Req1),
%% We try to delete first even though it hasn't been set to
%% make sure this noop is possible.
Req1 = cowboy_req:delete_resp_header(<<"content-type">>, Req0),
false = cowboy_req:has_resp_header(<<"content-type">>, Req1),
Req2 = cowboy_req:set_resp_header(<<"content-type">>, <<"text/plain">>, Req1),
true = cowboy_req:has_resp_header(<<"content-type">>, Req2),
Req = cowboy_req:delete_resp_header(<<"content-type">>, Req2),
false = cowboy_req:has_resp_header(<<"content-type">>, Req),
{ok, cowboy_req:reply(200, #{}, "OK", Req), Opts};
do(<<"inform2">>, Req0, Opts) ->