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-rw-r--r--src/cow_spdy.erl27
1 files changed, 25 insertions, 2 deletions
diff --git a/src/cow_spdy.erl b/src/cow_spdy.erl
index 59c1ba4..94f2310 100644
--- a/src/cow_spdy.erl
+++ b/src/cow_spdy.erl
@@ -253,13 +253,36 @@ goaway(LastGoodStreamID, Status) ->
%% @todo window_update
build_headers(Zdef, Headers) ->
- NbHeaders = length(Headers),
+ DedupedHeaders = dedupe_headers(Headers, []),
+ NbHeaders = length(DedupedHeaders),
Headers2 = [begin
L1 = iolist_size(Key),
L2 = iolist_size(Value),
[<< L1:32 >>, Key, << L2:32 >>, Value]
- end || {Key, Value} <- Headers],
+ end || {Key, Value} <- DedupedHeaders],
zlib:deflate(Zdef, [<< NbHeaders:32 >>, Headers2], full).
+dedupe_headers([], Acc) ->
+ lists:reverse(Acc);
+dedupe_headers([{Key, Value}|Headers], Acc) ->
+ Acc2 = append_header_value(Key, Value, Acc, []),
+ dedupe_headers(Headers, Acc2).
+
+append_header_value(Key, Value, [], Acc) ->
+ [{Key, Value}|Acc];
+append_header_value(Key, Value, [{Key, PrevValue}|Rest], Acc) ->
+ [{Key, [PrevValue, 0, Value]}|Rest] ++ Acc;
+append_header_value(Key, Value, [Header|Headers], Acc) ->
+ append_header_value(Key, Value, Headers, [Header|Acc]).
+
+-ifdef(TEST).
+dedupe_headers_test_() ->
+ Tests = [
+ {[{<<"set-cookie">>, <<"session=123">>}, {<<"set-cookie">>, <<"other=456">>}, {<<"content-type">>, <<"text/html">>}],
+ [{<<"set-cookie">>, [<<"session=123">>, 0, <<"other=456">>]}, {<<"content-type">>, <<"text/html">>}]}
+ ],
+ [fun() -> D = dedupe_headers(R, []) end || {R, D} <- Tests].
+-endif.
+
to_flag(false) -> 0;
to_flag(true) -> 1.