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It allows to temporarily disable Websocket compression when it was negotiated. It's ignored otherwise. This can be used as fine-grained control when some frames do not compress well.
24 lines
734 B
Erlang
24 lines
734 B
Erlang
%% This module enables/disables compression
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%% every time it echoes a frame.
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-module(ws_deflate_commands_h).
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-behavior(cowboy_websocket).
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-export([init/2]).
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-export([websocket_handle/2]).
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-export([websocket_info/2]).
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init(Req, RunOrHibernate) ->
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{cowboy_websocket, Req,
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#{deflate => true, hibernate => RunOrHibernate},
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#{compress => true}}.
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websocket_handle(Frame, State=#{deflate := Deflate0, hibernate := run}) ->
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Deflate = not Deflate0,
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{[Frame, {deflate, Deflate}], State#{deflate => Deflate}};
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websocket_handle(Frame, State=#{deflate := Deflate0, hibernate := hibernate}) ->
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Deflate = not Deflate0,
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{[Frame, {deflate, Deflate}], State#{deflate => Deflate}, hibernate}.
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websocket_info(_Info, State) ->
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{[], State}.
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