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%% @author Bob Ippolito <bob@mochimedia.com>
%% @copyright 2007 Mochi Media, Inc.
%% @doc Response abstraction.
-module(mochiweb_response, [Request, Code, Headers]).
-author('bob@mochimedia.com').
-define(QUIP, "Any of you quaids got a smint?").
-export([get_header_value/1, get/1, dump/0]).
-export([send/1, write_chunk/1]).
%% @spec get_header_value(string() | atom() | binary()) -> string() | undefined
%% @doc Get the value of the given response header.
get_header_value(K) ->
mochiweb_headers:get_value(K, Headers).
%% @spec get(request | code | headers) -> term()
%% @doc Return the internal representation of the given field.
get(request) ->
Request;
get(code) ->
Code;
get(headers) ->
Headers.
%% @spec dump() -> {mochiweb_request, [{atom(), term()}]}
%% @doc Dump the internal representation to a "human readable" set of terms
%% for debugging/inspection purposes.
dump() ->
[{request, Request:dump()},
{code, Code},
{headers, mochiweb_headers:to_list(Headers)}].
%% @spec send(iodata()) -> ok
%% @doc Send data over the socket if the method is not HEAD.
send(Data) ->
case Request:get(method) of
'HEAD' ->
ok;
_ ->
Request:send(Data)
end.
%% @spec write_chunk(iodata()) -> ok
%% @doc Write a chunk of a HTTP chunked response. If Data is zero length,
%% then the chunked response will be finished.
write_chunk(Data) ->
Length = iolist_size(Data),
send(io_lib:format("~.16b\r\n", [Length])),
send([Data, <<"\r\n">>]).
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