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%% @author Bob Ippolito <bob@mochimedia.com>
%% @copyright 2007 Mochi Media, Inc.
%% @doc HTTP server.
-module(mochiweb_http).
-author('bob@mochimedia.com').
-export([start/0, start/1, stop/0, stop/1]).
-export([loop/2, default_body/1]).
-export([after_response/2, reentry/1]).
-define(IDLE_TIMEOUT, 30000).
-define(MAX_HEADERS, 1000).
-define(DEFAULTS, [{name, ?MODULE},
{port, 8888}]).
set_default({Prop, Value}, PropList) ->
case proplists:is_defined(Prop, PropList) of
true ->
PropList;
false ->
[{Prop, Value} | PropList]
end.
set_defaults(Defaults, PropList) ->
lists:foldl(fun set_default/2, PropList, Defaults).
parse_options(Options) ->
{loop, HttpLoop} = proplists:lookup(loop, Options),
Loop = fun (S) ->
?MODULE:loop(S, HttpLoop)
end,
Options1 = [{loop, Loop} | proplists:delete(loop, Options)],
set_defaults(?DEFAULTS, Options1).
stop() ->
mochiweb_socket_server:stop(?MODULE).
stop(Name) ->
mochiweb_socket_server:stop(Name).
start() ->
start([{ip, "127.0.0.1"},
{loop, {?MODULE, default_body}}]).
start(Options) ->
mochiweb_socket_server:start(parse_options(Options)).
frm(Body) ->
["<html><head></head><body>"
"<form method=\"POST\">"
"<input type=\"hidden\" value=\"message\" name=\"hidden\"/>"
"<input type=\"submit\" value=\"regular POST\">"
"</form>"
"<br />"
"<form method=\"POST\" enctype=\"multipart/form-data\""
" action=\"/multipart\">"
"<input type=\"hidden\" value=\"multipart message\" name=\"hidden\"/>"
"<input type=\"file\" name=\"file\"/>"
"<input type=\"submit\" value=\"multipart POST\" />"
"</form>"
"<pre>", Body, "</pre>"
"</body></html>"].
default_body(Req, M, "/chunked") when M =:= 'GET'; M =:= 'HEAD' ->
Res = Req:ok({"text/plain", [], chunked}),
Res:write_chunk("First chunk\r\n"),
timer:sleep(5000),
Res:write_chunk("Last chunk\r\n"),
Res:write_chunk("");
default_body(Req, M, _Path) when M =:= 'GET'; M =:= 'HEAD' ->
Body = io_lib:format("~p~n", [[{parse_qs, Req:parse_qs()},
{parse_cookie, Req:parse_cookie()},
Req:dump()]]),
Req:ok({"text/html",
[mochiweb_cookies:cookie("mochiweb_http", "test_cookie")],
frm(Body)});
default_body(Req, 'POST', "/multipart") ->
Body = io_lib:format("~p~n", [[{parse_qs, Req:parse_qs()},
{parse_cookie, Req:parse_cookie()},
{body, Req:recv_body()},
Req:dump()]]),
Req:ok({"text/html", [], frm(Body)});
default_body(Req, 'POST', _Path) ->
Body = io_lib:format("~p~n", [[{parse_qs, Req:parse_qs()},
{parse_cookie, Req:parse_cookie()},
{parse_post, Req:parse_post()},
Req:dump()]]),
Req:ok({"text/html", [], frm(Body)});
default_body(Req, _Method, _Path) ->
Req:respond({501, [], []}).
default_body(Req) ->
default_body(Req, Req:get(method), Req:get(path)).
loop(Socket, Body) ->
inet:setopts(Socket, [{packet, http}]),
request(Socket, Body).
request(Socket, Body) ->
case gen_tcp:recv(Socket, 0, ?IDLE_TIMEOUT) of
{ok, {http_request, Method, Path, Version}} ->
headers(Socket, {Method, Path, Version}, [], Body, 0);
{error, {http_error, "\r\n"}} ->
request(Socket, Body);
{error, {http_error, "\n"}} ->
request(Socket, Body);
_Other ->
gen_tcp:close(Socket),
exit(normal)
end.
reentry(Body) ->
fun (Req) ->
?MODULE:after_response(Body, Req)
end.
headers(Socket, Request, Headers, _Body, ?MAX_HEADERS) ->
%% Too many headers sent, bad request.
inet:setopts(Socket, [{packet, raw}]),
Req = mochiweb:new_request({Socket, Request,
lists:reverse(Headers)}),
Req:respond({400, [], []}),
gen_tcp:close(Socket),
exit(normal);
headers(Socket, Request, Headers, Body, HeaderCount) ->
case gen_tcp:recv(Socket, 0, ?IDLE_TIMEOUT) of
{ok, http_eoh} ->
inet:setopts(Socket, [{packet, raw}]),
Req = mochiweb:new_request({Socket, Request,
lists:reverse(Headers)}),
Body(Req),
?MODULE:after_response(Body, Req);
{ok, {http_header, _, Name, _, Value}} ->
headers(Socket, Request, [{Name, Value} | Headers], Body,
1 + HeaderCount);
_Other ->
gen_tcp:close(Socket),
exit(normal)
end.
after_response(Body, Req) ->
Socket = Req:get(socket),
case Req:should_close() of
true ->
gen_tcp:close(Socket),
exit(normal);
false ->
Req:cleanup(),
?MODULE:loop(Socket, Body)
end.
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