diff options
Diffstat (limited to '1.1.x/src/ibrowse/ibrowse_http_client.erl')
| -rw-r--r-- | 1.1.x/src/ibrowse/ibrowse_http_client.erl | 1855 |
1 files changed, 1855 insertions, 0 deletions
diff --git a/1.1.x/src/ibrowse/ibrowse_http_client.erl b/1.1.x/src/ibrowse/ibrowse_http_client.erl new file mode 100644 index 00000000..eb2bf315 --- /dev/null +++ b/1.1.x/src/ibrowse/ibrowse_http_client.erl @@ -0,0 +1,1855 @@ +%%%------------------------------------------------------------------- +%%% File : ibrowse_http_client.erl +%%% Author : Chandrashekhar Mullaparthi <chandrashekhar.mullaparthi@t-mobile.co.uk> +%%% Description : The name says it all +%%% +%%% Created : 11 Oct 2003 by Chandrashekhar Mullaparthi <chandrashekhar.mullaparthi@t-mobile.co.uk> +%%%------------------------------------------------------------------- +-module(ibrowse_http_client). +-behaviour(gen_server). +%%-------------------------------------------------------------------- +%% Include files +%%-------------------------------------------------------------------- + +%%-------------------------------------------------------------------- +%% External exports +-export([ + start_link/1, + start/1, + stop/1, + send_req/7 + ]). + +-ifdef(debug). +-compile(export_all). +-endif. + +%% gen_server callbacks +-export([ + init/1, + handle_call/3, + handle_cast/2, + handle_info/2, + terminate/2, + code_change/3 + ]). + +-include("ibrowse.hrl"). +-include_lib("kernel/include/inet.hrl"). + +-record(state, {host, port, connect_timeout, + inactivity_timer_ref, + use_proxy = false, proxy_auth_digest, + ssl_options = [], is_ssl = false, socket, + proxy_tunnel_setup = false, + tunnel_setup_queue = [], + reqs=queue:new(), cur_req, status=idle, http_status_code, + reply_buffer = <<>>, rep_buf_size=0, streamed_size = 0, + recvd_headers=[], + status_line, raw_headers, + is_closing, send_timer, content_length, + deleted_crlf = false, transfer_encoding, + chunk_size, chunk_size_buffer = <<>>, + recvd_chunk_size, interim_reply_sent = false, + lb_ets_tid, cur_pipeline_size = 0, prev_req_id + }). + +-record(request, {url, method, options, from, + stream_to, caller_controls_socket = false, + caller_socket_options = [], + req_id, + stream_chunk_size, + save_response_to_file = false, + tmp_file_name, tmp_file_fd, preserve_chunked_encoding, + response_format}). + +-import(ibrowse_lib, [ + get_value/2, + get_value/3, + do_trace/2 + ]). + +-define(DEFAULT_STREAM_CHUNK_SIZE, 1024*1024). +-define(dec2hex(X), erlang:integer_to_list(X, 16)). +%%==================================================================== +%% External functions +%%==================================================================== +%%-------------------------------------------------------------------- +%% Function: start_link/0 +%% Description: Starts the server +%%-------------------------------------------------------------------- +start(Args) -> + gen_server:start(?MODULE, Args, []). + +start_link(Args) -> + gen_server:start_link(?MODULE, Args, []). + +stop(Conn_pid) -> + case catch gen_server:call(Conn_pid, stop) of + {'EXIT', {timeout, _}} -> + exit(Conn_pid, kill), + ok; + _ -> + ok + end. + +send_req(Conn_Pid, Url, Headers, Method, Body, Options, Timeout) -> + gen_server:call( + Conn_Pid, + {send_req, {Url, Headers, Method, Body, Options, Timeout}}, Timeout). + +%%==================================================================== +%% Server functions +%%==================================================================== + +%%-------------------------------------------------------------------- +%% Function: init/1 +%% Description: Initiates the server +%% Returns: {ok, State} | +%% {ok, State, Timeout} | +%% ignore | +%% {stop, Reason} +%%-------------------------------------------------------------------- +init({Lb_Tid, #url{host = Host, port = Port}, {SSLOptions, Is_ssl}}) -> + State = #state{host = Host, + port = Port, + ssl_options = SSLOptions, + is_ssl = Is_ssl, + lb_ets_tid = Lb_Tid}, + put(ibrowse_trace_token, [Host, $:, integer_to_list(Port)]), + put(my_trace_flag, ibrowse_lib:get_trace_status(Host, Port)), + {ok, State}; +init(Url) when is_list(Url) -> + case catch ibrowse_lib:parse_url(Url) of + #url{protocol = Protocol} = Url_rec -> + init({undefined, Url_rec, {[], Protocol == https}}); + {'EXIT', _} -> + {error, invalid_url} + end; +init({Host, Port}) -> + State = #state{host = Host, + port = Port}, + put(ibrowse_trace_token, [Host, $:, integer_to_list(Port)]), + put(my_trace_flag, ibrowse_lib:get_trace_status(Host, Port)), + {ok, State}. + +%%-------------------------------------------------------------------- +%% Function: handle_call/3 +%% Description: Handling call messages +%% Returns: {reply, Reply, State} | +%% {reply, Reply, State, Timeout} | +%% {noreply, State} | +%% {noreply, State, Timeout} | +%% {stop, Reason, Reply, State} | (terminate/2 is called) +%% {stop, Reason, State} (terminate/2 is called) +%%-------------------------------------------------------------------- +%% Received a request when the remote server has already sent us a +%% Connection: Close header +handle_call({send_req, _}, _From, #state{is_closing = true} = State) -> + {reply, {error, connection_closing}, State}; + +handle_call({send_req, {Url, Headers, Method, Body, Options, Timeout}}, + From, State) -> + send_req_1(From, Url, Headers, Method, Body, Options, Timeout, State); + +handle_call(stop, _From, State) -> + do_close(State), + do_error_reply(State, closing_on_request), + {stop, normal, ok, State}; + +handle_call(Request, _From, State) -> + Reply = {unknown_request, Request}, + {reply, Reply, State}. + +%%-------------------------------------------------------------------- +%% Function: handle_cast/2 +%% Description: Handling cast messages +%% Returns: {noreply, State} | +%% {noreply, State, Timeout} | +%% {stop, Reason, State} (terminate/2 is called) +%%-------------------------------------------------------------------- +handle_cast(_Msg, State) -> + {noreply, State}. + +%%-------------------------------------------------------------------- +%% Function: handle_info/2 +%% Description: Handling all non call/cast messages +%% Returns: {noreply, State} | +%% {noreply, State, Timeout} | +%% {stop, Reason, State} (terminate/2 is called) +%%-------------------------------------------------------------------- +handle_info({tcp, _Sock, Data}, #state{status = Status} = State) -> +%% io:format("Recvd data: ~p~n", [Data]), + do_trace("Data recvd in state: ~p. Size: ~p. ~p~n~n", [Status, size(Data), Data]), + handle_sock_data(Data, State); +handle_info({ssl, _Sock, Data}, State) -> + handle_sock_data(Data, State); + +handle_info({stream_next, Req_id}, #state{socket = Socket, + cur_req = #request{req_id = Req_id}} = State) -> + %% io:format("Client process set {active, once}~n", []), + do_setopts(Socket, [{active, once}], State), + {noreply, set_inac_timer(State)}; + +handle_info({stream_next, _Req_id}, State) -> + _Cur_req_id = case State#state.cur_req of + #request{req_id = Cur} -> + Cur; + _ -> + undefined + end, +%% io:format("Ignoring stream_next as ~1000.p is not cur req (~1000.p)~n", +%% [_Req_id, _Cur_req_id]), + {noreply, State}; + +handle_info({stream_close, _Req_id}, State) -> + shutting_down(State), + do_close(State), + do_error_reply(State, closing_on_request), + {stop, normal, State}; + +handle_info({tcp_closed, _Sock}, State) -> + do_trace("TCP connection closed by peer!~n", []), + handle_sock_closed(State), + {stop, normal, State}; +handle_info({ssl_closed, _Sock}, State) -> + do_trace("SSL connection closed by peer!~n", []), + handle_sock_closed(State), + {stop, normal, State}; + +handle_info({tcp_error, _Sock, Reason}, State) -> + do_trace("Error on connection to ~1000.p:~1000.p -> ~1000.p~n", + [State#state.host, State#state.port, Reason]), + handle_sock_closed(State), + {stop, normal, State}; +handle_info({ssl_error, _Sock, Reason}, State) -> + do_trace("Error on SSL connection to ~1000.p:~1000.p -> ~1000.p~n", + [State#state.host, State#state.port, Reason]), + handle_sock_closed(State), + {stop, normal, State}; + +handle_info({req_timedout, From}, State) -> + case lists:keymember(From, #request.from, queue:to_list(State#state.reqs)) of + false -> + {noreply, State}; + true -> + shutting_down(State), + do_error_reply(State, req_timedout), + {stop, normal, State} + end; + +handle_info(timeout, State) -> + do_trace("Inactivity timeout triggered. Shutting down connection~n", []), + shutting_down(State), + do_error_reply(State, req_timedout), + {stop, normal, State}; + +handle_info({trace, Bool}, State) -> + put(my_trace_flag, Bool), + {noreply, State}; + +handle_info(Info, State) -> + io:format("Unknown message recvd for ~1000.p:~1000.p -> ~p~n", + [State#state.host, State#state.port, Info]), + io:format("Recvd unknown message ~p when in state: ~p~n", [Info, State]), + {noreply, State}. + +%%-------------------------------------------------------------------- +%% Function: terminate/2 +%% Description: Shutdown the server +%% Returns: any (ignored by gen_server) +%%-------------------------------------------------------------------- +terminate(_Reason, State) -> + do_close(State), + ok. + +%%-------------------------------------------------------------------- +%% Func: code_change/3 +%% Purpose: Convert process state when code is changed +%% Returns: {ok, NewState} +%%-------------------------------------------------------------------- +code_change(_OldVsn, State, _Extra) -> + {ok, State}. + +%%-------------------------------------------------------------------- +%%% Internal functions +%%-------------------------------------------------------------------- + +%%-------------------------------------------------------------------- +%% Handles data recvd on the socket +%%-------------------------------------------------------------------- +handle_sock_data(Data, #state{status=idle}=State) -> + do_trace("Data recvd on socket in state idle!. ~1000.p~n", [Data]), + shutting_down(State), + do_error_reply(State, data_in_status_idle), + do_close(State), + {stop, normal, State}; + +handle_sock_data(Data, #state{status = get_header}=State) -> + case parse_response(Data, State) of + {error, _Reason} -> + shutting_down(State), + {stop, normal, State}; + #state{socket = Socket, status = Status, cur_req = CurReq} = State_1 -> + case {Status, CurReq} of + {get_header, #request{caller_controls_socket = true}} -> + do_setopts(Socket, [{active, once}], State_1); + _ -> + active_once(State_1) + end, + {noreply, set_inac_timer(State_1)} + end; + +handle_sock_data(Data, #state{status = get_body, + socket = Socket, + content_length = CL, + http_status_code = StatCode, + recvd_headers = Headers, + chunk_size = CSz} = State) -> + case (CL == undefined) and (CSz == undefined) of + true -> + case accumulate_response(Data, State) of + {error, Reason} -> + shutting_down(State), + fail_pipelined_requests(State, + {error, {Reason, {stat_code, StatCode}, Headers}}), + {stop, normal, State}; + State_1 -> + active_once(State_1), + State_2 = set_inac_timer(State_1), + {noreply, State_2} + end; + _ -> + case parse_11_response(Data, State) of + {error, Reason} -> + shutting_down(State), + fail_pipelined_requests(State, + {error, {Reason, {stat_code, StatCode}, Headers}}), + {stop, normal, State}; + #state{cur_req = #request{caller_controls_socket = Ccs}, + interim_reply_sent = Irs} = State_1 -> + case Irs of + true -> + active_once(State_1); + false when Ccs == true -> + do_setopts(Socket, [{active, once}], State); + false -> + active_once(State_1) + end, + State_2 = State_1#state{interim_reply_sent = false}, + case Ccs of + true -> + cancel_timer(State_2#state.inactivity_timer_ref, {eat_message, timeout}), + {noreply, State_2#state{inactivity_timer_ref = undefined}}; + _ -> + {noreply, set_inac_timer(State_2)} + end; + State_1 -> + active_once(State_1), + State_2 = set_inac_timer(State_1), + {noreply, State_2} + end + end. + +accumulate_response(Data, + #state{ + cur_req = #request{save_response_to_file = Srtf, + tmp_file_fd = undefined} = CurReq, + http_status_code=[$2 | _]}=State) when Srtf /= false -> + TmpFilename = make_tmp_filename(Srtf), + case file:open(TmpFilename, [write, delayed_write, raw]) of + {ok, Fd} -> + accumulate_response(Data, State#state{ + cur_req = CurReq#request{ + tmp_file_fd = Fd, + tmp_file_name = TmpFilename}}); + {error, Reason} -> + {error, {file_open_error, Reason}} + end; +accumulate_response(Data, #state{cur_req = #request{save_response_to_file = Srtf, + tmp_file_fd = Fd}, + transfer_encoding=chunked, + reply_buffer = Reply_buf, + http_status_code=[$2 | _] + } = State) when Srtf /= false -> + case file:write(Fd, [Reply_buf, Data]) of + ok -> + State#state{reply_buffer = <<>>}; + {error, Reason} -> + {error, {file_write_error, Reason}} + end; +accumulate_response(Data, #state{cur_req = #request{save_response_to_file = Srtf, + tmp_file_fd = Fd}, + reply_buffer = RepBuf, + http_status_code=[$2 | _] + } = State) when Srtf /= false -> + case file:write(Fd, [RepBuf, Data]) of + ok -> + State#state{reply_buffer = <<>>}; + {error, Reason} -> + {error, {file_write_error, Reason}} + end; +accumulate_response(Data, #state{reply_buffer = RepBuf, + rep_buf_size = RepBufSize, + streamed_size = Streamed_size, + cur_req = CurReq}=State) -> + #request{stream_to = StreamTo, + req_id = ReqId, + stream_chunk_size = Stream_chunk_size, + response_format = Response_format, + caller_controls_socket = Caller_controls_socket} = CurReq, + RepBuf_1 = <<RepBuf/binary, Data/binary>>, + New_data_size = RepBufSize - Streamed_size, + case StreamTo of + undefined -> + State#state{reply_buffer = RepBuf_1}; + _ when Caller_controls_socket == true -> + do_interim_reply(StreamTo, Response_format, ReqId, RepBuf_1), + State#state{reply_buffer = <<>>, + interim_reply_sent = true, + streamed_size = Streamed_size + size(RepBuf_1)}; + _ when New_data_size >= Stream_chunk_size -> + {Stream_chunk, Rem_data} = split_binary(RepBuf_1, Stream_chunk_size), + do_interim_reply(StreamTo, Response_format, ReqId, Stream_chunk), + State_1 = State#state{ + reply_buffer = <<>>, + interim_reply_sent = true, + streamed_size = Streamed_size + Stream_chunk_size}, + case Rem_data of + <<>> -> + State_1; + _ -> + accumulate_response(Rem_data, State_1) + end; + _ -> + State#state{reply_buffer = RepBuf_1} + end. + +make_tmp_filename(true) -> + DownloadDir = ibrowse:get_config_value(download_dir, filename:absname("./")), + {A,B,C} = now(), + filename:join([DownloadDir, + "ibrowse_tmp_file_"++ + integer_to_list(A) ++ + integer_to_list(B) ++ + integer_to_list(C)]); +make_tmp_filename(File) when is_list(File) -> + File. + + +%%-------------------------------------------------------------------- +%% Handles the case when the server closes the socket +%%-------------------------------------------------------------------- +handle_sock_closed(#state{status=get_header} = State) -> + shutting_down(State), + do_error_reply(State, connection_closed); + +handle_sock_closed(#state{cur_req=undefined} = State) -> + shutting_down(State); + +%% We check for IsClosing because this the server could have sent a +%% Connection-Close header and has closed the socket to indicate end +%% of response. There maybe requests pipelined which need a response. +handle_sock_closed(#state{reply_buffer = Buf, reqs = Reqs, http_status_code = SC, + is_closing = IsClosing, + cur_req = #request{tmp_file_name=TmpFilename, + tmp_file_fd=Fd} = CurReq, + status = get_body, + recvd_headers = Headers, + status_line = Status_line, + raw_headers = Raw_headers + }=State) -> + #request{from=From, stream_to=StreamTo, req_id=ReqId, + response_format = Resp_format, + options = Options} = CurReq, + case IsClosing of + true -> + {_, Reqs_1} = queue:out(Reqs), + Body = case TmpFilename of + undefined -> + Buf; + _ -> + ok = file:close(Fd), + {file, TmpFilename} + end, + Reply = case get_value(give_raw_headers, Options, false) of + true -> + {ok, Status_line, Raw_headers, Body}; + false -> + {ok, SC, Headers, Buf} + end, + State_1 = do_reply(State, From, StreamTo, ReqId, Resp_format, Reply), + ok = do_error_reply(State_1#state{reqs = Reqs_1}, connection_closed), + State_1; + _ -> + ok = do_error_reply(State, connection_closed), + State + end. + +do_connect(Host, Port, Options, #state{is_ssl = true, + use_proxy = false, + ssl_options = SSLOptions}, + Timeout) -> + ssl:connect(Host, Port, get_sock_options(Host, Options, SSLOptions), Timeout); +do_connect(Host, Port, Options, _State, Timeout) -> + gen_tcp:connect(Host, Port, get_sock_options(Host, Options, []), Timeout). + +get_sock_options(Host, Options, SSLOptions) -> + Caller_socket_options = get_value(socket_options, Options, []), + Ipv6Options = case is_ipv6_host(Host) of + true -> + [inet6]; + false -> + [] + end, + Other_sock_options = filter_sock_options(SSLOptions ++ Caller_socket_options ++ Ipv6Options), + case lists:keysearch(nodelay, 1, Other_sock_options) of + false -> + [{nodelay, true}, binary, {active, false} | Other_sock_options]; + {value, _} -> + [binary, {active, false} | Other_sock_options] + end. + +is_ipv6_host(Host) -> + case inet_parse:address(Host) of + {ok, {_, _, _, _, _, _, _, _}} -> + true; + {ok, {_, _, _, _}} -> + false; + _ -> + case inet:gethostbyname(Host) of + {ok, #hostent{h_addrtype = inet6}} -> + true; + _ -> + false + end + end. + +%% We don't want the caller to specify certain options +filter_sock_options(Opts) -> + lists:filter(fun({active, _}) -> + false; + ({packet, _}) -> + false; + (list) -> + false; + (_) -> + true + end, Opts). + +do_send(Req, #state{socket = Sock, + is_ssl = true, + use_proxy = true, + proxy_tunnel_setup = Pts}) when Pts /= done -> gen_tcp:send(Sock, Req); +do_send(Req, #state{socket = Sock, is_ssl = true}) -> ssl:send(Sock, Req); +do_send(Req, #state{socket = Sock, is_ssl = false}) -> gen_tcp:send(Sock, Req). + +%% @spec do_send_body(Sock::socket_descriptor(), Source::source_descriptor(), IsSSL::boolean()) -> ok | error() +%% source_descriptor() = fun_arity_0 | +%% {fun_arity_0} | +%% {fun_arity_1, term()} +%% error() = term() +do_send_body(Source, State, TE) when is_function(Source) -> + do_send_body({Source}, State, TE); +do_send_body({Source}, State, TE) when is_function(Source) -> + do_send_body1(Source, Source(), State, TE); +do_send_body({Source, Source_state}, State, TE) when is_function(Source) -> + do_send_body1(Source, Source(Source_state), State, TE); +do_send_body(Body, State, _TE) -> + do_send(Body, State). + +do_send_body1(Source, Resp, State, TE) -> + case Resp of + {ok, Data} -> + do_send(maybe_chunked_encode(Data, TE), State), + do_send_body({Source}, State, TE); + {ok, Data, New_source_state} -> + do_send(maybe_chunked_encode(Data, TE), State), + do_send_body({Source, New_source_state}, State, TE); + eof when TE == true -> + do_send(<<"0\r\n\r\n">>, State), + ok; + eof -> + ok; + Err -> + Err + end. + +maybe_chunked_encode(Data, false) -> + Data; +maybe_chunked_encode(Data, true) -> + [?dec2hex(iolist_size(Data)), "\r\n", Data, "\r\n"]. + +do_close(#state{socket = undefined}) -> ok; +do_close(#state{socket = Sock, + is_ssl = true, + use_proxy = true, + proxy_tunnel_setup = Pts + }) when Pts /= done -> catch gen_tcp:close(Sock); +do_close(#state{socket = Sock, is_ssl = true}) -> catch ssl:close(Sock); +do_close(#state{socket = Sock, is_ssl = false}) -> catch gen_tcp:close(Sock). + +active_once(#state{cur_req = #request{caller_controls_socket = true}}) -> + ok; +active_once(#state{socket = Socket} = State) -> + do_setopts(Socket, [{active, once}], State). + +do_setopts(_Sock, [], _) -> ok; +do_setopts(Sock, Opts, #state{is_ssl = true, + use_proxy = true, + proxy_tunnel_setup = Pts} + ) when Pts /= done -> inet:setopts(Sock, Opts); +do_setopts(Sock, Opts, #state{is_ssl = true}) -> ssl:setopts(Sock, Opts); +do_setopts(Sock, Opts, _) -> inet:setopts(Sock, Opts). + +check_ssl_options(Options, State) -> + case get_value(is_ssl, Options, false) of + false -> + State; + true -> + State#state{is_ssl=true, ssl_options=get_value(ssl_options, Options)} + end. + +send_req_1(From, + #url{host = Host, + port = Port} = Url, + Headers, Method, Body, Options, Timeout, + #state{socket = undefined} = State) -> + {Host_1, Port_1, State_1} = + case get_value(proxy_host, Options, false) of + false -> + {Host, Port, State}; + PHost -> + ProxyUser = get_value(proxy_user, Options, []), + ProxyPassword = get_value(proxy_password, Options, []), + Digest = http_auth_digest(ProxyUser, ProxyPassword), + {PHost, get_value(proxy_port, Options, 80), + State#state{use_proxy = true, + proxy_auth_digest = Digest}} + end, + State_2 = check_ssl_options(Options, State_1), + do_trace("Connecting...~n", []), + Conn_timeout = get_value(connect_timeout, Options, Timeout), + case do_connect(Host_1, Port_1, Options, State_2, Conn_timeout) of + {ok, Sock} -> + do_trace("Connected! Socket: ~1000.p~n", [Sock]), + State_3 = State_2#state{socket = Sock, + connect_timeout = Conn_timeout}, + send_req_1(From, Url, Headers, Method, Body, Options, Timeout, State_3); + Err -> + shutting_down(State_2), + do_trace("Error connecting. Reason: ~1000.p~n", [Err]), + gen_server:reply(From, {error, {conn_failed, Err}}), + {stop, normal, State_2} + end; + +%% Send a CONNECT request. +%% Wait for 200 OK +%% Upgrade to SSL connection +%% Then send request + +send_req_1(From, + #url{ + host = Server_host, + port = Server_port + } = Url, + Headers, Method, Body, Options, Timeout, + #state{ + proxy_tunnel_setup = false, + use_proxy = true, + is_ssl = true} = State) -> + NewReq = #request{ + method = connect, + preserve_chunked_encoding = get_value(preserve_chunked_encoding, Options, false), + options = Options + }, + State_1 = State#state{reqs=queue:in(NewReq, State#state.reqs)}, + Pxy_auth_headers = maybe_modify_headers(Url, Method, Options, [], State_1), + Path = [Server_host, $:, integer_to_list(Server_port)], + {Req, Body_1} = make_request(connect, Pxy_auth_headers, + Path, Path, + [], Options, State_1, undefined), + TE = is_chunked_encoding_specified(Options), + trace_request(Req), + case do_send(Req, State) of + ok -> + case do_send_body(Body_1, State_1, TE) of + ok -> + trace_request_body(Body_1), + active_once(State_1), + Ref = case Timeout of + infinity -> + undefined; + _ -> + erlang:send_after(Timeout, self(), {req_timedout, From}) + end, + State_2 = State_1#state{status = get_header, + cur_req = NewReq, + send_timer = Ref, + proxy_tunnel_setup = in_progress, + tunnel_setup_queue = [{From, Url, Headers, Method, Body, Options, Timeout}]}, + State_3 = set_inac_timer(State_2), + {noreply, State_3}; + Err -> + shutting_down(State_1), + do_trace("Send failed... Reason: ~p~n", [Err]), + gen_server:reply(From, {error, {send_failed, Err}}), + {stop, normal, State_1} + end; + Err -> + shutting_down(State_1), + do_trace("Send failed... Reason: ~p~n", [Err]), + gen_server:reply(From, {error, {send_failed, Err}}), + {stop, normal, State_1} + end; + +send_req_1(From, Url, Headers, Method, Body, Options, Timeout, + #state{proxy_tunnel_setup = in_progress, + tunnel_setup_queue = Q} = State) -> + do_trace("Queued SSL request awaiting tunnel setup: ~n" + "URL : ~s~n" + "Method : ~p~n" + "Headers : ~p~n", [Url, Method, Headers]), + {noreply, State#state{tunnel_setup_queue = [{From, Url, Headers, Method, Body, Options, Timeout} | Q]}}; + +send_req_1(From, + #url{abspath = AbsPath, + path = RelPath} = Url, + Headers, Method, Body, Options, Timeout, + #state{status = Status, + socket = Socket} = State) -> + cancel_timer(State#state.inactivity_timer_ref, {eat_message, timeout}), + ReqId = make_req_id(), + Resp_format = get_value(response_format, Options, list), + Caller_socket_options = get_value(socket_options, Options, []), + {StreamTo, Caller_controls_socket} = + case get_value(stream_to, Options, undefined) of + {Caller, once} when is_pid(Caller) or + is_atom(Caller) -> + Async_pid_rec = {{req_id_pid, ReqId}, self()}, + true = ets:insert(ibrowse_stream, Async_pid_rec), + {Caller, true}; + undefined -> + {undefined, false}; + Caller when is_pid(Caller) or + is_atom(Caller) -> + {Caller, false}; + Stream_to_inv -> + exit({invalid_option, {stream_to, Stream_to_inv}}) + end, + SaveResponseToFile = get_value(save_response_to_file, Options, false), + NewReq = #request{url = Url, + method = Method, + stream_to = StreamTo, + caller_controls_socket = Caller_controls_socket, + caller_socket_options = Caller_socket_options, + options = Options, + req_id = ReqId, + save_response_to_file = SaveResponseToFile, + stream_chunk_size = get_stream_chunk_size(Options), + response_format = Resp_format, + from = From, + preserve_chunked_encoding = get_value(preserve_chunked_encoding, Options, false) + }, + State_1 = State#state{reqs=queue:in(NewReq, State#state.reqs)}, + Headers_1 = maybe_modify_headers(Url, Method, Options, Headers, State_1), + {Req, Body_1} = make_request(Method, + Headers_1, + AbsPath, RelPath, Body, Options, State_1, + ReqId), + trace_request(Req), + do_setopts(Socket, Caller_socket_options, State_1), + TE = is_chunked_encoding_specified(Options), + case do_send(Req, State_1) of + ok -> + case do_send_body(Body_1, State_1, TE) of + ok -> + trace_request_body(Body_1), + State_2 = inc_pipeline_counter(State_1), + active_once(State_2), + Ref = case Timeout of + infinity -> + undefined; + _ -> + erlang:send_after(Timeout, self(), {req_timedout, From}) + end, + State_3 = case Status of + idle -> + State_2#state{status = get_header, + cur_req = NewReq, + send_timer = Ref}; + _ -> + State_2#state{send_timer = Ref} + end, + case StreamTo of + undefined -> + ok; + _ -> + gen_server:reply(From, {ibrowse_req_id, ReqId}) + end, + State_4 = set_inac_timer(State_3), + {noreply, State_4}; + Err -> + shutting_down(State_1), + do_trace("Send failed... Reason: ~p~n", [Err]), + gen_server:reply(From, {error, {send_failed, Err}}), + {stop, normal, State_1} + end; + Err -> + shutting_down(State_1), + do_trace("Send failed... Reason: ~p~n", [Err]), + gen_server:reply(From, {error, {send_failed, Err}}), + {stop, normal, State_1} + end. + +maybe_modify_headers(#url{}, connect, _, Headers, State) -> + add_proxy_auth_headers(State, Headers); +maybe_modify_headers(#url{host = Host, port = Port} = Url, + _Method, + Options, Headers, State) -> + case get_value(headers_as_is, Options, false) of + false -> + Headers_1 = add_auth_headers(Url, Options, Headers, State), + HostHeaderValue = case lists:keysearch(host_header, 1, Options) of + false -> + case Port of + 80 -> Host; + 443 -> Host; + _ -> [Host, ":", integer_to_list(Port)] + end; + {value, {_, Host_h_val}} -> + Host_h_val + end, + [{"Host", HostHeaderValue} | Headers_1]; + true -> + Headers + end. + +add_auth_headers(#url{username = User, + password = UPw}, + Options, + Headers, + State) -> + Headers_1 = case User of + undefined -> + case get_value(basic_auth, Options, undefined) of + undefined -> + Headers; + {U,P} -> + [{"Authorization", ["Basic ", http_auth_digest(U, P)]} | Headers] + end; + _ -> + [{"Authorization", ["Basic ", http_auth_digest(User, UPw)]} | Headers] + end, + add_proxy_auth_headers(State, Headers_1). + +add_proxy_auth_headers(#state{use_proxy = false}, Headers) -> + Headers; +add_proxy_auth_headers(#state{proxy_auth_digest = []}, Headers) -> + Headers; +add_proxy_auth_headers(#state{proxy_auth_digest = Auth_digest}, Headers) -> + [{"Proxy-Authorization", ["Basic ", Auth_digest]} | Headers]. + +http_auth_digest([], []) -> + []; +http_auth_digest(Username, Password) -> + ibrowse_lib:encode_base64(Username ++ [$: | Password]). + +make_request(Method, Headers, AbsPath, RelPath, Body, Options, + #state{use_proxy = UseProxy, is_ssl = Is_ssl}, ReqId) -> + HttpVsn = http_vsn_string(get_value(http_vsn, Options, {1,1})), + Fun1 = fun({X, Y}) when is_atom(X) -> + {to_lower(atom_to_list(X)), X, Y}; + ({X, Y}) when is_list(X) -> + {to_lower(X), X, Y} + end, + Headers_0 = [Fun1(X) || X <- Headers], + Headers_1 = + case lists:keysearch("content-length", 1, Headers_0) of + false when (Body =:= [] orelse Body =:= <<>>) andalso + (Method =:= post orelse Method =:= put) -> + [{"content-length", "Content-Length", "0"} | Headers_0]; + false when is_binary(Body) orelse is_list(Body) -> + [{"content-length", "Content-Length", integer_to_list(iolist_size(Body))} | Headers_0]; + _ -> + %% Content-Length is already specified or Body is a + %% function or function/state pair + Headers_0 + end, + {Headers_2, Body_1} = + case is_chunked_encoding_specified(Options) of + false -> + {[{Y, Z} || {_, Y, Z} <- Headers_1], Body}; + true -> + Chunk_size_1 = case get_value(transfer_encoding, Options) of + chunked -> + 5120; + {chunked, Chunk_size} -> + Chunk_size + end, + {[{Y, Z} || {X, Y, Z} <- Headers_1, + X /= "content-length"] ++ + [{"Transfer-Encoding", "chunked"}], + chunk_request_body(Body, Chunk_size_1)} + end, + Headers_3 = case lists:member({include_ibrowse_req_id, true}, Options) of + true -> + [{"x-ibrowse-request-id", io_lib:format("~1000.p",[ReqId])} | Headers_2]; + false -> + Headers_2 + end, + Headers_4 = cons_headers(Headers_3), + Uri = case get_value(use_absolute_uri, Options, false) or UseProxy of + true -> + case Is_ssl of + true -> + RelPath; + false -> + AbsPath + end; + false -> + RelPath + end, + {[method(Method), " ", Uri, " ", HttpVsn, crnl(), Headers_4, crnl()], Body_1}. + +is_chunked_encoding_specified(Options) -> + case get_value(transfer_encoding, Options, false) of + false -> + false; + {chunked, _} -> + true; + chunked -> + true + end. + +http_vsn_string({0,9}) -> "HTTP/0.9"; +http_vsn_string({1,0}) -> "HTTP/1.0"; +http_vsn_string({1,1}) -> "HTTP/1.1". + +cons_headers(Headers) -> + cons_headers(Headers, []). +cons_headers([], Acc) -> + encode_headers(Acc); +cons_headers([{basic_auth, {U,P}} | T], Acc) -> + cons_headers(T, [{"Authorization", + ["Basic ", ibrowse_lib:encode_base64(U++":"++P)]} | Acc]); +cons_headers([{cookie, Cookie} | T], Acc) -> + cons_headers(T, [{"Cookie", Cookie} | Acc]); +cons_headers([{content_length, L} | T], Acc) -> + cons_headers(T, [{"Content-Length", L} | Acc]); +cons_headers([{content_type, L} | T], Acc) -> + cons_headers(T, [{"Content-Type", L} | Acc]); +cons_headers([H | T], Acc) -> + cons_headers(T, [H | Acc]). + +encode_headers(L) -> + encode_headers(L, []). +encode_headers([{http_vsn, _Val} | T], Acc) -> + encode_headers(T, Acc); +encode_headers([{Name,Val} | T], Acc) when is_list(Name) -> + encode_headers(T, [[Name, ": ", fmt_val(Val), crnl()] | Acc]); +encode_headers([{Name,Val} | T], Acc) when is_atom(Name) -> + encode_headers(T, [[atom_to_list(Name), ": ", fmt_val(Val), crnl()] | Acc]); +encode_headers([], Acc) -> + lists:reverse(Acc). + +chunk_request_body(Body, _ChunkSize) when is_tuple(Body) orelse + is_function(Body) -> + Body; +chunk_request_body(Body, ChunkSize) -> + chunk_request_body(Body, ChunkSize, []). + +chunk_request_body(Body, _ChunkSize, Acc) when Body == <<>>; Body == [] -> + LastChunk = "0\r\n", + lists:reverse(["\r\n", LastChunk | Acc]); +chunk_request_body(Body, ChunkSize, Acc) when is_binary(Body), + size(Body) >= ChunkSize -> + <<ChunkBody:ChunkSize/binary, Rest/binary>> = Body, + Chunk = [?dec2hex(ChunkSize),"\r\n", + ChunkBody, "\r\n"], + chunk_request_body(Rest, ChunkSize, [Chunk | Acc]); +chunk_request_body(Body, _ChunkSize, Acc) when is_binary(Body) -> + BodySize = size(Body), + Chunk = [?dec2hex(BodySize),"\r\n", + Body, "\r\n"], + LastChunk = "0\r\n", + lists:reverse(["\r\n", LastChunk, Chunk | Acc]); +chunk_request_body(Body, ChunkSize, Acc) when length(Body) >= ChunkSize -> + {ChunkBody, Rest} = split_list_at(Body, ChunkSize), + Chunk = [?dec2hex(ChunkSize),"\r\n", + ChunkBody, "\r\n"], + chunk_request_body(Rest, ChunkSize, [Chunk | Acc]); +chunk_request_body(Body, _ChunkSize, Acc) when is_list(Body) -> + BodySize = length(Body), + Chunk = [?dec2hex(BodySize),"\r\n", + Body, "\r\n"], + LastChunk = "0\r\n", + lists:reverse(["\r\n", LastChunk, Chunk | Acc]). + + +parse_response(_Data, #state{cur_req = undefined}=State) -> + State#state{status = idle}; +parse_response(Data, #state{reply_buffer = Acc, reqs = Reqs, + cur_req = CurReq} = State) -> + #request{from=From, stream_to=StreamTo, req_id=ReqId, + method=Method, response_format = Resp_format, + options = Options + } = CurReq, + MaxHeaderSize = ibrowse:get_config_value(max_headers_size, infinity), + case scan_header(Acc, Data) of + {yes, Headers, Data_1} -> + do_trace("Recvd Header Data -> ~s~n----~n", [Headers]), + do_trace("Recvd headers~n--- Headers Begin ---~n~s~n--- Headers End ---~n~n", [Headers]), + {HttpVsn, StatCode, Headers_1, Status_line, Raw_headers} = parse_headers(Headers), + do_trace("HttpVsn: ~p StatusCode: ~p Headers_1 -> ~1000.p~n", [HttpVsn, StatCode, Headers_1]), + LCHeaders = [{to_lower(X), Y} || {X,Y} <- Headers_1], + ConnClose = to_lower(get_value("connection", LCHeaders, "false")), + IsClosing = is_connection_closing(HttpVsn, ConnClose), + case IsClosing of + true -> + shutting_down(State); + false -> + ok + end, + Give_raw_headers = get_value(give_raw_headers, Options, false), + State_1 = case Give_raw_headers of + true -> + State#state{recvd_headers=Headers_1, status=get_body, + reply_buffer = <<>>, + status_line = Status_line, + raw_headers = Raw_headers, + http_status_code=StatCode, is_closing=IsClosing}; + false -> + State#state{recvd_headers=Headers_1, status=get_body, + reply_buffer = <<>>, + http_status_code=StatCode, is_closing=IsClosing} + end, + put(conn_close, ConnClose), + TransferEncoding = to_lower(get_value("transfer-encoding", LCHeaders, "false")), + case get_value("content-length", LCHeaders, undefined) of + _ when Method == connect, + hd(StatCode) == $2 -> + cancel_timer(State#state.send_timer), + {_, Reqs_1} = queue:out(Reqs), + upgrade_to_ssl(set_cur_request(State#state{reqs = Reqs_1, + recvd_headers = [], + status = idle + })); + _ when Method == connect -> + {_, Reqs_1} = queue:out(Reqs), + do_error_reply(State#state{reqs = Reqs_1}, + {error, proxy_tunnel_failed}), + {error, proxy_tunnel_failed}; + _ when Method == head -> + {_, Reqs_1} = queue:out(Reqs), + send_async_headers(ReqId, StreamTo, Give_raw_headers, State_1), + State_1_1 = do_reply(State_1, From, StreamTo, ReqId, Resp_format, + {ok, StatCode, Headers_1, []}), + cancel_timer(State_1_1#state.send_timer, {eat_message, {req_timedout, From}}), + State_2 = reset_state(State_1_1), + State_3 = set_cur_request(State_2#state{reqs = Reqs_1}), + parse_response(Data_1, State_3); + _ when hd(StatCode) =:= $1 -> + %% No message body is expected. Server may send + %% one or more 1XX responses before a proper + %% response. + send_async_headers(ReqId, StreamTo, Give_raw_headers, State_1), + do_trace("Recvd a status code of ~p. Ignoring and waiting for a proper response~n", [StatCode]), + parse_response(Data_1, State_1#state{recvd_headers = [], + status = get_header}); + _ when StatCode =:= "204"; + StatCode =:= "304" -> + %% No message body is expected for these Status Codes. + %% RFC2616 - Sec 4.4 + {_, Reqs_1} = queue:out(Reqs), + send_async_headers(ReqId, StreamTo, Give_raw_headers, State_1), + State_1_1 = do_reply(State_1, From, StreamTo, ReqId, Resp_format, + {ok, StatCode, Headers_1, []}), + cancel_timer(State_1_1#state.send_timer, {eat_message, {req_timedout, From}}), + State_2 = reset_state(State_1_1), + State_3 = set_cur_request(State_2#state{reqs = Reqs_1}), + parse_response(Data_1, State_3); + _ when TransferEncoding =:= "chunked" -> + do_trace("Chunked encoding detected...~n",[]), + send_async_headers(ReqId, StreamTo, Give_raw_headers, State_1), + case parse_11_response(Data_1, State_1#state{transfer_encoding=chunked, + chunk_size=chunk_start, + reply_buffer = <<>>}) of + {error, Reason} -> + fail_pipelined_requests(State_1, + {error, {Reason, + {stat_code, StatCode}, Headers_1}}), + {error, Reason}; + State_2 -> + State_2 + end; + undefined when HttpVsn =:= "HTTP/1.0"; + ConnClose =:= "close" -> + send_async_headers(ReqId, StreamTo, Give_raw_headers, State_1), + State_1#state{reply_buffer = Data_1}; + undefined -> + fail_pipelined_requests(State_1, + {error, {content_length_undefined, + {stat_code, StatCode}, Headers}}), + {error, content_length_undefined}; + V -> + case catch list_to_integer(V) of + V_1 when is_integer(V_1), V_1 >= 0 -> + send_async_headers(ReqId, StreamTo, Give_raw_headers, State_1), + do_trace("Recvd Content-Length of ~p~n", [V_1]), + State_2 = State_1#state{rep_buf_size=0, + reply_buffer = <<>>, + content_length=V_1}, + case parse_11_response(Data_1, State_2) of + {error, Reason} -> + fail_pipelined_requests(State_1, + {error, {Reason, + {stat_code, StatCode}, Headers_1}}), + {error, Reason}; + State_3 -> + State_3 + end; + _ -> + fail_pipelined_requests(State_1, + {error, {content_length_undefined, + {stat_code, StatCode}, Headers}}), + {error, content_length_undefined} + end + end; + {no, Acc_1} when MaxHeaderSize == infinity -> + State#state{reply_buffer = Acc_1}; + {no, Acc_1} when size(Acc_1) < MaxHeaderSize -> + State#state{reply_buffer = Acc_1}; + {no, _Acc_1} -> + fail_pipelined_requests(State, {error, max_headers_size_exceeded}), + {error, max_headers_size_exceeded} + end. + +upgrade_to_ssl(#state{socket = Socket, + connect_timeout = Conn_timeout, + ssl_options = Ssl_options, + tunnel_setup_queue = Q} = State) -> + case ssl:connect(Socket, Ssl_options, Conn_timeout) of + {ok, Ssl_socket} -> + do_trace("Upgraded to SSL socket!!~n", []), + State_1 = State#state{socket = Ssl_socket, + proxy_tunnel_setup = done}, + send_queued_requests(lists:reverse(Q), State_1); + Err -> + do_trace("Upgrade to SSL socket failed. Reson: ~p~n", [Err]), + do_error_reply(State, {error, {send_failed, Err}}), + {error, send_failed} + end. + +send_queued_requests([], State) -> + do_trace("Sent all queued requests via SSL connection~n", []), + State#state{tunnel_setup_queue = []}; +send_queued_requests([{From, Url, Headers, Method, Body, Options, Timeout} | Q], + State) -> + case send_req_1(From, Url, Headers, Method, Body, Options, Timeout, State) of + {noreply, State_1} -> + send_queued_requests(Q, State_1); + Err -> + do_trace("Error sending queued SSL request: ~n" + "URL : ~s~n" + "Method : ~p~n" + "Headers : ~p~n", [Url, Method, Headers]), + do_error_reply(State, {error, {send_failed, Err}}), + {error, send_failed} + end. + +is_connection_closing("HTTP/0.9", _) -> true; +is_connection_closing(_, "close") -> true; +is_connection_closing("HTTP/1.0", "false") -> true; +is_connection_closing(_, _) -> false. + +%% This clause determines the chunk size when given data from the beginning of the chunk +parse_11_response(DataRecvd, + #state{transfer_encoding = chunked, + chunk_size = chunk_start, + chunk_size_buffer = Chunk_sz_buf + } = State) -> + case scan_crlf(Chunk_sz_buf, DataRecvd) of + {yes, ChunkHeader, Data_1} -> + State_1 = maybe_accumulate_ce_data(State, <<ChunkHeader/binary, $\r, $\n>>), + ChunkSize = parse_chunk_header(ChunkHeader), + %% + %% Do we have to preserve the chunk encoding when + %% streaming? NO. This should be transparent to the client + %% process. Chunked encoding was only introduced to make + %% it efficient for the server. + %% + RemLen = size(Data_1), + do_trace("Determined chunk size: ~p. Already recvd: ~p~n", + [ChunkSize, RemLen]), + parse_11_response(Data_1, State_1#state{chunk_size_buffer = <<>>, + deleted_crlf = true, + recvd_chunk_size = 0, + chunk_size = ChunkSize}); + {no, Data_1} -> + State#state{chunk_size_buffer = Data_1} + end; + +%% This clause is to remove the CRLF between two chunks +%% +parse_11_response(DataRecvd, + #state{transfer_encoding = chunked, + chunk_size = tbd, + chunk_size_buffer = Buf + } = State) -> + case scan_crlf(Buf, DataRecvd) of + {yes, _, NextChunk} -> + State_1 = maybe_accumulate_ce_data(State, <<$\r, $\n>>), + State_2 = State_1#state{chunk_size = chunk_start, + chunk_size_buffer = <<>>, + deleted_crlf = true}, + parse_11_response(NextChunk, State_2); + {no, Data_1} -> + State#state{chunk_size_buffer = Data_1} + end; + +%% This clause deals with the end of a chunked transfer. ibrowse does +%% not support Trailers in the Chunked Transfer encoding. Any trailer +%% received is silently discarded. +parse_11_response(DataRecvd, + #state{transfer_encoding = chunked, chunk_size = 0, + cur_req = CurReq, + deleted_crlf = DelCrlf, + chunk_size_buffer = Trailer, + reqs = Reqs} = State) -> + do_trace("Detected end of chunked transfer...~n", []), + DataRecvd_1 = case DelCrlf of + false -> + DataRecvd; + true -> + <<$\r, $\n, DataRecvd/binary>> + end, + case scan_header(Trailer, DataRecvd_1) of + {yes, TEHeaders, Rem} -> + {_, Reqs_1} = queue:out(Reqs), + State_1 = maybe_accumulate_ce_data(State, <<TEHeaders/binary, $\r, $\n>>), + State_2 = handle_response(CurReq, + State_1#state{reqs = Reqs_1}), + parse_response(Rem, reset_state(State_2)); + {no, Rem} -> + accumulate_response(<<>>, State#state{chunk_size_buffer = Rem, deleted_crlf = false}) + end; + +%% This clause extracts a chunk, given the size. +parse_11_response(DataRecvd, + #state{transfer_encoding = chunked, + chunk_size = CSz, + recvd_chunk_size = Recvd_csz, + rep_buf_size = RepBufSz} = State) -> + NeedBytes = CSz - Recvd_csz, + DataLen = size(DataRecvd), + do_trace("Recvd more data: size: ~p. NeedBytes: ~p~n", [DataLen, NeedBytes]), + case DataLen >= NeedBytes of + true -> + {RemChunk, RemData} = split_binary(DataRecvd, NeedBytes), + do_trace("Recvd another chunk...~p~n", [RemChunk]), + do_trace("RemData -> ~p~n", [RemData]), + case accumulate_response(RemChunk, State) of + {error, Reason} -> + do_trace("Error accumulating response --> ~p~n", [Reason]), + {error, Reason}; + #state{} = State_1 -> + State_2 = State_1#state{chunk_size=tbd}, + parse_11_response(RemData, State_2) + end; + false -> + accumulate_response(DataRecvd, + State#state{rep_buf_size = RepBufSz + DataLen, + recvd_chunk_size = Recvd_csz + DataLen}) + end; + +%% This clause to extract the body when Content-Length is specified +parse_11_response(DataRecvd, + #state{content_length=CL, rep_buf_size=RepBufSz, + reqs=Reqs}=State) -> + NeedBytes = CL - RepBufSz, + DataLen = size(DataRecvd), + case DataLen >= NeedBytes of + true -> + {RemBody, Rem} = split_binary(DataRecvd, NeedBytes), + {_, Reqs_1} = queue:out(Reqs), + State_1 = accumulate_response(RemBody, State), + State_2 = handle_response(State_1#state.cur_req, State_1#state{reqs=Reqs_1}), + State_3 = reset_state(State_2), + parse_response(Rem, State_3); + false -> + accumulate_response(DataRecvd, State#state{rep_buf_size = (RepBufSz+DataLen)}) + end. + +maybe_accumulate_ce_data(#state{cur_req = #request{preserve_chunked_encoding = false}} = State, _) -> + State; +maybe_accumulate_ce_data(State, Data) -> + accumulate_response(Data, State). + +handle_response(#request{from=From, stream_to=StreamTo, req_id=ReqId, + response_format = Resp_format, + save_response_to_file = SaveResponseToFile, + tmp_file_name = TmpFilename, + tmp_file_fd = Fd, + options = Options + }, + #state{http_status_code = SCode, + status_line = Status_line, + raw_headers = Raw_headers, + send_timer = ReqTimer, + reply_buffer = RepBuf, + recvd_headers = RespHeaders}=State) when SaveResponseToFile /= false -> + Body = RepBuf, + case Fd of + undefined -> + ok; + _ -> + ok = file:close(Fd) + end, + ResponseBody = case TmpFilename of + undefined -> + Body; + _ -> + {file, TmpFilename} + end, + {Resp_headers_1, Raw_headers_1} = maybe_add_custom_headers(RespHeaders, Raw_headers, Options), + Reply = case get_value(give_raw_headers, Options, false) of + true -> + {ok, Status_line, Raw_headers_1, ResponseBody}; + false -> + {ok, SCode, Resp_headers_1, ResponseBody} + end, + State_1 = do_reply(State, From, StreamTo, ReqId, Resp_format, Reply), + cancel_timer(ReqTimer, {eat_message, {req_timedout, From}}), + set_cur_request(State_1); +handle_response(#request{from=From, stream_to=StreamTo, req_id=ReqId, + response_format = Resp_format, + options = Options}, + #state{http_status_code = SCode, + status_line = Status_line, + raw_headers = Raw_headers, + recvd_headers = Resp_headers, + reply_buffer = RepBuf, + send_timer = ReqTimer} = State) -> + Body = RepBuf, + {Resp_headers_1, Raw_headers_1} = maybe_add_custom_headers(Resp_headers, Raw_headers, Options), + Reply = case get_value(give_raw_headers, Options, false) of + true -> + {ok, Status_line, Raw_headers_1, Body}; + false -> + {ok, SCode, Resp_headers_1, Body} + end, + State_1 = do_reply(State, From, StreamTo, ReqId, Resp_format, Reply), + cancel_timer(ReqTimer, {eat_message, {req_timedout, From}}), + set_cur_request(State_1). + +reset_state(State) -> + State#state{status = get_header, + rep_buf_size = 0, + streamed_size = 0, + content_length = undefined, + reply_buffer = <<>>, + chunk_size_buffer = <<>>, + recvd_headers = [], + status_line = undefined, + raw_headers = undefined, + deleted_crlf = false, + http_status_code = undefined, + chunk_size = undefined, + transfer_encoding = undefined + }. + +set_cur_request(#state{reqs = Reqs, socket = Socket} = State) -> + case queue:to_list(Reqs) of + [] -> + State#state{cur_req = undefined}; + [#request{caller_controls_socket = Ccs} = NextReq | _] -> + case Ccs of + true -> + do_setopts(Socket, [{active, once}], State); + _ -> + ok + end, + State#state{cur_req = NextReq} + end. + +parse_headers(Headers) -> + case scan_crlf(Headers) of + {yes, StatusLine, T} -> + parse_headers(StatusLine, T); + {no, StatusLine} -> + parse_headers(StatusLine, <<>>) + end. + +parse_headers(StatusLine, Headers) -> + Headers_1 = parse_headers_1(Headers), + case parse_status_line(StatusLine) of + {ok, HttpVsn, StatCode, _Msg} -> + put(http_prot_vsn, HttpVsn), + {HttpVsn, StatCode, Headers_1, StatusLine, Headers}; + _ -> %% A HTTP 0.9 response? + put(http_prot_vsn, "HTTP/0.9"), + {"HTTP/0.9", undefined, Headers, StatusLine, Headers} + end. + +% From RFC 2616 +% +% HTTP/1.1 header field values can be folded onto multiple lines if +% the continuation line begins with a space or horizontal tab. All +% linear white space, including folding, has the same semantics as +% SP. A recipient MAY replace any linear white space with a single +% SP before interpreting the field value or forwarding the message +% downstream. +parse_headers_1(B) when is_binary(B) -> + parse_headers_1(binary_to_list(B)); +parse_headers_1(String) -> + parse_headers_1(String, [], []). + +parse_headers_1([$\n, H |T], [$\r | L], Acc) when H =:= 32; + H =:= $\t -> + parse_headers_1(lists:dropwhile(fun(X) -> + is_whitespace(X) + end, T), [32 | L], Acc); +parse_headers_1([$\n|T], [$\r | L], Acc) -> + case parse_header(lists:reverse(L)) of + invalid -> + parse_headers_1(T, [], Acc); + NewHeader -> + parse_headers_1(T, [], [NewHeader | Acc]) + end; +parse_headers_1([H|T], L, Acc) -> + parse_headers_1(T, [H|L], Acc); +parse_headers_1([], [], Acc) -> + lists:reverse(Acc); +parse_headers_1([], L, Acc) -> + Acc_1 = case parse_header(lists:reverse(L)) of + invalid -> + Acc; + NewHeader -> + [NewHeader | Acc] + end, + lists:reverse(Acc_1). + +parse_status_line(Line) when is_binary(Line) -> + parse_status_line(binary_to_list(Line)); +parse_status_line(Line) -> + parse_status_line(Line, get_prot_vsn, [], []). +parse_status_line([32 | T], get_prot_vsn, ProtVsn, StatCode) -> + parse_status_line(T, get_status_code, ProtVsn, StatCode); +parse_status_line([32 | T], get_status_code, ProtVsn, StatCode) -> + {ok, lists:reverse(ProtVsn), lists:reverse(StatCode), T}; +parse_status_line([], get_status_code, ProtVsn, StatCode) -> + {ok, lists:reverse(ProtVsn), lists:reverse(StatCode), []}; +parse_status_line([H | T], get_prot_vsn, ProtVsn, StatCode) -> + parse_status_line(T, get_prot_vsn, [H|ProtVsn], StatCode); +parse_status_line([H | T], get_status_code, ProtVsn, StatCode) -> + parse_status_line(T, get_status_code, ProtVsn, [H | StatCode]); +parse_status_line([], _, _, _) -> + http_09. + +parse_header(L) -> + parse_header(L, []). + +parse_header([$: | V], Acc) -> + {lists:reverse(Acc), string:strip(V)}; +parse_header([H | T], Acc) -> + parse_header(T, [H | Acc]); +parse_header([], _) -> + invalid. + +scan_header(Bin) -> + case get_crlf_crlf_pos(Bin, 0) of + {yes, Pos} -> + {Headers, <<_:4/binary, Body/binary>>} = split_binary(Bin, Pos), + {yes, Headers, Body}; + no -> + {no, Bin} + end. + +scan_header(Bin1, Bin2) when size(Bin1) < 4 -> + scan_header(<<Bin1/binary, Bin2/binary>>); +scan_header(Bin1, <<>>) -> + scan_header(Bin1); +scan_header(Bin1, Bin2) -> + Bin1_already_scanned_size = size(Bin1) - 4, + <<Headers_prefix:Bin1_already_scanned_size/binary, Rest/binary>> = Bin1, + Bin_to_scan = <<Rest/binary, Bin2/binary>>, + case get_crlf_crlf_pos(Bin_to_scan, 0) of + {yes, Pos} -> + {Headers_suffix, <<_:4/binary, Body/binary>>} = split_binary(Bin_to_scan, Pos), + {yes, <<Headers_prefix/binary, Headers_suffix/binary>>, Body}; + no -> + {no, <<Bin1/binary, Bin2/binary>>} + end. + +get_crlf_crlf_pos(<<$\r, $\n, $\r, $\n, _/binary>>, Pos) -> {yes, Pos}; +get_crlf_crlf_pos(<<_, Rest/binary>>, Pos) -> get_crlf_crlf_pos(Rest, Pos + 1); +get_crlf_crlf_pos(<<>>, _) -> no. + +scan_crlf(Bin) -> + case get_crlf_pos(Bin) of + {yes, Pos} -> + {Prefix, <<_, _, Suffix/binary>>} = split_binary(Bin, Pos), + {yes, Prefix, Suffix}; + no -> + {no, Bin} + end. + +scan_crlf(<<>>, Bin2) -> + scan_crlf(Bin2); +scan_crlf(Bin1, Bin2) when size(Bin1) < 2 -> + scan_crlf(<<Bin1/binary, Bin2/binary>>); +scan_crlf(Bin1, Bin2) -> + scan_crlf_1(size(Bin1) - 2, Bin1, Bin2). + +scan_crlf_1(Bin1_head_size, Bin1, Bin2) -> + <<Bin1_head:Bin1_head_size/binary, Bin1_tail/binary>> = Bin1, + Bin3 = <<Bin1_tail/binary, Bin2/binary>>, + case get_crlf_pos(Bin3) of + {yes, Pos} -> + {Prefix, <<_, _, Suffix/binary>>} = split_binary(Bin3, Pos), + {yes, list_to_binary([Bin1_head, Prefix]), Suffix}; + no -> + {no, list_to_binary([Bin1, Bin2])} + end. + +get_crlf_pos(Bin) -> + get_crlf_pos(Bin, 0). + +get_crlf_pos(<<$\r, $\n, _/binary>>, Pos) -> {yes, Pos}; +get_crlf_pos(<<_, Rest/binary>>, Pos) -> get_crlf_pos(Rest, Pos + 1); +get_crlf_pos(<<>>, _) -> no. + +fmt_val(L) when is_list(L) -> L; +fmt_val(I) when is_integer(I) -> integer_to_list(I); +fmt_val(A) when is_atom(A) -> atom_to_list(A); +fmt_val(Term) -> io_lib:format("~p", [Term]). + +crnl() -> "\r\n". + +method(get) -> "GET"; +method(post) -> "POST"; +method(head) -> "HEAD"; +method(options) -> "OPTIONS"; +method(put) -> "PUT"; +method(delete) -> "DELETE"; +method(trace) -> "TRACE"; +method(mkcol) -> "MKCOL"; +method(propfind) -> "PROPFIND"; +method(proppatch) -> "PROPPATCH"; +method(lock) -> "LOCK"; +method(unlock) -> "UNLOCK"; +method(move) -> "MOVE"; +method(copy) -> "COPY"; +method(connect) -> "CONNECT". + +%% From RFC 2616 +%% +% The chunked encoding modifies the body of a message in order to +% transfer it as a series of chunks, each with its own size indicator, +% followed by an OPTIONAL trailer containing entity-header +% fields. This allows dynamically produced content to be transferred +% along with the information necessary for the recipient to verify +% that it has received the full message. +% Chunked-Body = *chunk +% last-chunk +% trailer +% CRLF +% chunk = chunk-size [ chunk-extension ] CRLF +% chunk-data CRLF +% chunk-size = 1*HEX +% last-chunk = 1*("0") [ chunk-extension ] CRLF +% chunk-extension= *( ";" chunk-ext-name [ "=" chunk-ext-val ] ) +% chunk-ext-name = token +% chunk-ext-val = token | quoted-string +% chunk-data = chunk-size(OCTET) +% trailer = *(entity-header CRLF) +% The chunk-size field is a string of hex digits indicating the size +% of the chunk. The chunked encoding is ended by any chunk whose size +% is zero, followed by the trailer, which is terminated by an empty +% line. +%% +%% The parsing implemented here discards all chunk extensions. It also +%% strips trailing spaces from the chunk size fields as Apache 1.3.27 was +%% sending them. +parse_chunk_header(ChunkHeader) -> + parse_chunk_header(ChunkHeader, []). + +parse_chunk_header(<<$;, _/binary>>, Acc) -> + hexlist_to_integer(lists:reverse(Acc)); +parse_chunk_header(<<H, T/binary>>, Acc) -> + case is_whitespace(H) of + true -> + parse_chunk_header(T, Acc); + false -> + parse_chunk_header(T, [H | Acc]) + end; +parse_chunk_header(<<>>, Acc) -> + hexlist_to_integer(lists:reverse(Acc)). + +is_whitespace($\s) -> true; +is_whitespace($\r) -> true; +is_whitespace($\n) -> true; +is_whitespace($\t) -> true; +is_whitespace(_) -> false. + +send_async_headers(_ReqId, undefined, _, _State) -> + ok; +send_async_headers(ReqId, StreamTo, Give_raw_headers, + #state{status_line = Status_line, raw_headers = Raw_headers, + recvd_headers = Headers, http_status_code = StatCode, + cur_req = #request{options = Opts} + }) -> + {Headers_1, Raw_headers_1} = maybe_add_custom_headers(Headers, Raw_headers, Opts), + case Give_raw_headers of + false -> + catch StreamTo ! {ibrowse_async_headers, ReqId, StatCode, Headers_1}; + true -> + catch StreamTo ! {ibrowse_async_headers, ReqId, Status_line, Raw_headers_1} + end. + +maybe_add_custom_headers(Headers, Raw_headers, Opts) -> + Custom_headers = get_value(add_custom_headers, Opts, []), + Headers_1 = Headers ++ Custom_headers, + Raw_headers_1 = case Custom_headers of + [_ | _] when is_binary(Raw_headers) -> + Custom_headers_bin = list_to_binary(string:join([[X, $:, Y] || {X, Y} <- Custom_headers], "\r\n")), + <<Raw_headers/binary, "\r\n", Custom_headers_bin/binary>>; + _ -> + Raw_headers + end, + {Headers_1, Raw_headers_1}. + +format_response_data(Resp_format, Body) -> + case Resp_format of + list when is_list(Body) -> + flatten(Body); + list when is_binary(Body) -> + binary_to_list(Body); + binary when is_list(Body) -> + list_to_binary(Body); + _ -> + %% This is to cater for sending messages such as + %% {chunk_start, _}, chunk_end etc + Body + end. + +do_reply(State, From, undefined, _, Resp_format, {ok, St_code, Headers, Body}) -> + Msg_1 = {ok, St_code, Headers, format_response_data(Resp_format, Body)}, + gen_server:reply(From, Msg_1), + dec_pipeline_counter(State); +do_reply(State, From, undefined, _, _, Msg) -> + gen_server:reply(From, Msg), + dec_pipeline_counter(State); +do_reply(#state{prev_req_id = Prev_req_id} = State, + _From, StreamTo, ReqId, Resp_format, {ok, _, _, Body}) -> + State_1 = dec_pipeline_counter(State), + case Body of + [] -> + ok; + _ -> + Body_1 = format_response_data(Resp_format, Body), + catch StreamTo ! {ibrowse_async_response, ReqId, Body_1} + end, + catch StreamTo ! {ibrowse_async_response_end, ReqId}, + %% We don't want to delete the Req-id to Pid mapping straightaway + %% as the client may send a stream_next message just while we are + %% sending back this ibrowse_async_response_end message. If we + %% deleted this mapping straightaway, the caller will see a + %% {error, unknown_req_id} when it calls ibrowse:stream_next/1. To + %% get around this, we store the req id, and clear it after the + %% next request. If there are wierd combinations of stream, + %% stream_once and sync requests on the same connection, it will + %% take a while for the req_id-pid mapping to get cleared, but it + %% should do no harm. + ets:delete(ibrowse_stream, {req_id_pid, Prev_req_id}), + State_1#state{prev_req_id = ReqId}; +do_reply(State, _From, StreamTo, ReqId, Resp_format, Msg) -> + State_1 = dec_pipeline_counter(State), + Msg_1 = format_response_data(Resp_format, Msg), + catch StreamTo ! {ibrowse_async_response, ReqId, Msg_1}, + State_1. + +do_interim_reply(undefined, _, _ReqId, _Msg) -> + ok; +do_interim_reply(StreamTo, Response_format, ReqId, Msg) -> + Msg_1 = format_response_data(Response_format, Msg), + catch StreamTo ! {ibrowse_async_response, ReqId, Msg_1}. + +do_error_reply(#state{reqs = Reqs, tunnel_setup_queue = Tun_q} = State, Err) -> + ReqList = queue:to_list(Reqs), + lists:foreach(fun(#request{from=From, stream_to=StreamTo, req_id=ReqId, + response_format = Resp_format}) -> + ets:delete(ibrowse_stream, {req_id_pid, ReqId}), + do_reply(State, From, StreamTo, ReqId, Resp_format, {error, Err}) + end, ReqList), + lists:foreach( + fun({From, _Url, _Headers, _Method, _Body, _Options, _Timeout}) -> + do_reply(State, From, undefined, undefined, undefined, Err) + end, Tun_q). + +fail_pipelined_requests(#state{reqs = Reqs, cur_req = CurReq} = State, Reply) -> + {_, Reqs_1} = queue:out(Reqs), + #request{from=From, stream_to=StreamTo, req_id=ReqId, + response_format = Resp_format} = CurReq, + State_1 = do_reply(State, From, StreamTo, ReqId, Resp_format, Reply), + do_error_reply(State_1#state{reqs = Reqs_1}, previous_request_failed). + +split_list_at(List, N) -> + split_list_at(List, N, []). + +split_list_at([], _, Acc) -> + {lists:reverse(Acc), []}; +split_list_at(List2, 0, List1) -> + {lists:reverse(List1), List2}; +split_list_at([H | List2], N, List1) -> + split_list_at(List2, N-1, [H | List1]). + +hexlist_to_integer(List) -> + hexlist_to_integer(lists:reverse(List), 1, 0). + +hexlist_to_integer([H | T], Multiplier, Acc) -> + hexlist_to_integer(T, Multiplier*16, Multiplier*to_ascii(H) + Acc); +hexlist_to_integer([], _, Acc) -> + Acc. + +to_ascii($A) -> 10; +to_ascii($a) -> 10; +to_ascii($B) -> 11; +to_ascii($b) -> 11; +to_ascii($C) -> 12; +to_ascii($c) -> 12; +to_ascii($D) -> 13; +to_ascii($d) -> 13; +to_ascii($E) -> 14; +to_ascii($e) -> 14; +to_ascii($F) -> 15; +to_ascii($f) -> 15; +to_ascii($1) -> 1; +to_ascii($2) -> 2; +to_ascii($3) -> 3; +to_ascii($4) -> 4; +to_ascii($5) -> 5; +to_ascii($6) -> 6; +to_ascii($7) -> 7; +to_ascii($8) -> 8; +to_ascii($9) -> 9; +to_ascii($0) -> 0. + +cancel_timer(undefined) -> ok; +cancel_timer(Ref) -> _ = erlang:cancel_timer(Ref), + ok. + +cancel_timer(Ref, {eat_message, Msg}) -> + cancel_timer(Ref), + receive + Msg -> + ok + after 0 -> + ok + end. + +make_req_id() -> + now(). + +to_lower(Str) -> + to_lower(Str, []). +to_lower([H|T], Acc) when H >= $A, H =< $Z -> + to_lower(T, [H+32|Acc]); +to_lower([H|T], Acc) -> + to_lower(T, [H|Acc]); +to_lower([], Acc) -> + lists:reverse(Acc). + +shutting_down(#state{lb_ets_tid = undefined}) -> + ok; +shutting_down(#state{lb_ets_tid = Tid, + cur_pipeline_size = Sz}) -> + catch ets:delete(Tid, {Sz, self()}). + +inc_pipeline_counter(#state{is_closing = true} = State) -> + State; +inc_pipeline_counter(#state{cur_pipeline_size = Pipe_sz} = State) -> + State#state{cur_pipeline_size = Pipe_sz + 1}. + +dec_pipeline_counter(#state{is_closing = true} = State) -> + State; +dec_pipeline_counter(#state{lb_ets_tid = undefined} = State) -> + State; +dec_pipeline_counter(#state{cur_pipeline_size = Pipe_sz, + lb_ets_tid = Tid} = State) -> + ets:delete(Tid, {Pipe_sz, self()}), + ets:insert(Tid, {{Pipe_sz - 1, self()}, []}), + State#state{cur_pipeline_size = Pipe_sz - 1}. + +flatten([H | _] = L) when is_integer(H) -> + L; +flatten([H | _] = L) when is_list(H) -> + lists:flatten(L); +flatten([]) -> + []. + +get_stream_chunk_size(Options) -> + case lists:keysearch(stream_chunk_size, 1, Options) of + {value, {_, V}} when V > 0 -> + V; + _ -> + ?DEFAULT_STREAM_CHUNK_SIZE + end. + +set_inac_timer(State) -> + cancel_timer(State#state.inactivity_timer_ref), + set_inac_timer(State#state{inactivity_timer_ref = undefined}, + get_inac_timeout(State)). + +set_inac_timer(State, Timeout) when is_integer(Timeout) -> + Ref = erlang:send_after(Timeout, self(), timeout), + State#state{inactivity_timer_ref = Ref}; +set_inac_timer(State, _) -> + State. + +get_inac_timeout(#state{cur_req = #request{options = Opts}}) -> + get_value(inactivity_timeout, Opts, infinity); +get_inac_timeout(#state{cur_req = undefined}) -> + case ibrowse:get_config_value(inactivity_timeout, undefined) of + Val when is_integer(Val) -> + Val; + _ -> + case application:get_env(ibrowse, inactivity_timeout) of + {ok, Val} when is_integer(Val), Val > 0 -> + Val; + _ -> + 10000 + end + end. + +trace_request(Req) -> + case get(my_trace_flag) of + true -> + %%Avoid the binary operations if trace is not on... + NReq = to_binary(Req), + do_trace("Sending request: ~n" + "--- Request Begin ---~n~s~n" + "--- Request End ---~n", [NReq]); + _ -> ok + end. + +trace_request_body(Body) -> + case get(my_trace_flag) of + true -> + %%Avoid the binary operations if trace is not on... + NBody = to_binary(Body), + case size(NBody) > 1024 of + true -> + ok; + false -> + do_trace("Sending request body: ~n" + "--- Request Body Begin ---~n~s~n" + "--- Request Body End ---~n", [NBody]) + end; + false -> + ok + end. + +to_binary(X) when is_list(X) -> list_to_binary(X); +to_binary(X) when is_binary(X) -> X. |