erlang - Why does my successful streaming response in Webmachine have the status code 500? -


the following code full source of webmachine resource. expected behaviour streaming response should 200, , should string of specified length, entirely composed of letter 'a'.

this string indeed returned body of response, status code 500. how can be?

-module(dummy_binary_resource). -export([init/1, to_html/2]).  -include_lib("webmachine/include/webmachine.hrl").  init(config)->     {ok, config}.  send_streamed_body(remaining) ->     packetsize=1024,     case remaining of         partial when partial =< packetsize ->             {string:chars($a,partial),done};         full ->             {string:chars($a,full), fun() -> send_streamed_body(remaining - packetsize) end}     end.  to_html(reqdata,state)->     pathinfo = wrq:path_info(reqdata),     {ok,sizestring} = dict:find(size,pathinfo),     {size,[]} = string:to_integer(sizestring),     {true,wrq:set_resp_body({stream,send_streamed_body(size)},reqdata),state}.

the return value incorrect.

the appropriate return value {{halt, 200}, wrq:set_resp_body({stream, send_streamed_body(size)}, reqdata), state}. because request data record has been initialized default code of 500. seem counterintuitive returning "halt" value isn't going stop anything, in fact going signify success.


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