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Diffstat (limited to 'src/ibrowse/ibrowse.erl')
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diff --git a/src/ibrowse/ibrowse.erl b/src/ibrowse/ibrowse.erl deleted file mode 100644 index 1913ef59..00000000 --- a/src/ibrowse/ibrowse.erl +++ /dev/null @@ -1,760 +0,0 @@ -%%%------------------------------------------------------------------- -%%% File : ibrowse.erl -%%% Author : Chandrashekhar Mullaparthi <chandrashekhar.mullaparthi@t-mobile.co.uk> -%%% Description : Load balancer process for HTTP client connections. -%%% -%%% Created : 11 Oct 2003 by Chandrashekhar Mullaparthi <chandrashekhar.mullaparthi@t-mobile.co.uk> -%%%------------------------------------------------------------------- -%% @author Chandrashekhar Mullaparthi <chandrashekhar dot mullaparthi at gmail dot com> -%% @copyright 2005-2009 Chandrashekhar Mullaparthi -%% @version 1.5.2 -%% @doc The ibrowse application implements an HTTP 1.1 client. This -%% module implements the API of the HTTP client. There is one named -%% process called 'ibrowse' which assists in load balancing and maintaining configuration. There is one load balancing process per unique webserver. There is -%% one process to handle one TCP connection to a webserver -%% (implemented in the module ibrowse_http_client). Multiple connections to a -%% webserver are setup based on the settings for each webserver. The -%% ibrowse process also determines which connection to pipeline a -%% certain request on. The functions to call are send_req/3, -%% send_req/4, send_req/5, send_req/6. -%% -%% <p>Here are a few sample invocations.</p> -%% -%% <code> -%% ibrowse:send_req("http://intranet/messenger/", [], get). -%% <br/><br/> -%% -%% ibrowse:send_req("http://www.google.com/", [], get, [], -%% [{proxy_user, "XXXXX"}, -%% {proxy_password, "XXXXX"}, -%% {proxy_host, "proxy"}, -%% {proxy_port, 8080}], 1000). -%% <br/><br/> -%% -%%ibrowse:send_req("http://www.erlang.org/download/otp_src_R10B-3.tar.gz", [], get, [], -%% [{proxy_user, "XXXXX"}, -%% {proxy_password, "XXXXX"}, -%% {proxy_host, "proxy"}, -%% {proxy_port, 8080}, -%% {save_response_to_file, true}], 1000). -%% <br/><br/> -%% -%% ibrowse:send_req("http://www.erlang.org", [], head). -%% -%% <br/><br/> -%% ibrowse:send_req("http://www.sun.com", [], options). -%% -%% <br/><br/> -%% ibrowse:send_req("http://www.bbc.co.uk", [], trace). -%% -%% <br/><br/> -%% ibrowse:send_req("http://www.google.com", [], get, [], -%% [{stream_to, self()}]). -%% </code> -%% -%% <p>A driver exists which implements URL encoding in C, but the -%% speed achieved using only erlang has been good enough, so the -%% driver isn't actually used.</p> - --module(ibrowse). --vsn('$Id: ibrowse.erl,v 1.8 2009/07/01 22:43:19 chandrusf Exp $ '). - --behaviour(gen_server). -%%-------------------------------------------------------------------- -%% Include files -%%-------------------------------------------------------------------- - -%%-------------------------------------------------------------------- -%% External exports --export([start_link/0, start/0, stop/0]). - -%% gen_server callbacks --export([init/1, handle_call/3, handle_cast/2, handle_info/2, - terminate/2, code_change/3]). - -%% API interface --export([ - rescan_config/0, - rescan_config/1, - get_config_value/1, - get_config_value/2, - spawn_worker_process/2, - spawn_link_worker_process/2, - stop_worker_process/1, - send_req/3, - send_req/4, - send_req/5, - send_req/6, - send_req_direct/4, - send_req_direct/5, - send_req_direct/6, - send_req_direct/7, - stream_next/1, - set_max_sessions/3, - set_max_pipeline_size/3, - set_dest/3, - trace_on/0, - trace_off/0, - trace_on/2, - trace_off/2, - all_trace_off/0, - show_dest_status/0, - show_dest_status/2 - ]). - --ifdef(debug). --compile(export_all). --endif. - --import(ibrowse_lib, [ - parse_url/1, - get_value/3, - do_trace/2 - ]). - --record(state, {trace = false}). - --include("ibrowse.hrl"). --include_lib("stdlib/include/ms_transform.hrl"). - --define(DEF_MAX_SESSIONS,10). --define(DEF_MAX_PIPELINE_SIZE,10). - -%%==================================================================== -%% External functions -%%==================================================================== -%%-------------------------------------------------------------------- -%% Function: start_link/0 -%% Description: Starts the server -%%-------------------------------------------------------------------- -%% @doc Starts the ibrowse process linked to the calling process. Usually invoked by the supervisor ibrowse_sup -%% @spec start_link() -> {ok, pid()} -start_link() -> - gen_server:start_link({local, ?MODULE}, ?MODULE, [], []). - -%% @doc Starts the ibrowse process without linking. Useful when testing using the shell -start() -> - gen_server:start({local, ?MODULE}, ?MODULE, [], [{debug, []}]). - -%% @doc Stop the ibrowse process. Useful when testing using the shell. -stop() -> - catch gen_server:call(ibrowse, stop). - -%% @doc This is the basic function to send a HTTP request. -%% The Status return value indicates the HTTP status code returned by the webserver -%% @spec send_req(Url::string(), Headers::headerList(), Method::method()) -> response() -%% headerList() = [{header(), value()}] -%% header() = atom() | string() -%% value() = term() -%% method() = get | post | head | options | put | delete | trace | mkcol | propfind | proppatch | lock | unlock | move | copy -%% Status = string() -%% ResponseHeaders = [respHeader()] -%% respHeader() = {headerName(), headerValue()} -%% headerName() = string() -%% headerValue() = string() -%% response() = {ok, Status, ResponseHeaders, ResponseBody} | {ibrowse_req_id, req_id() } | {error, Reason} -%% req_id() = term() -%% ResponseBody = string() | {file, Filename} -%% Reason = term() -send_req(Url, Headers, Method) -> - send_req(Url, Headers, Method, [], []). - -%% @doc Same as send_req/3. -%% If a list is specified for the body it has to be a flat list. The body can also be a fun/0 or a fun/1. <br/> -%% If fun/0, the connection handling process will repeatdely call the fun until it returns an error or eof. <pre>Fun() = {ok, Data} | eof</pre><br/> -%% If fun/1, the connection handling process will repeatedly call the fun with the supplied state until it returns an error or eof. <pre>Fun(State) = {ok, Data} | {ok, Data, NewState} | eof</pre> -%% @spec send_req(Url, Headers, Method::method(), Body::body()) -> response() -%% body() = [] | string() | binary() | fun_arity_0() | {fun_arity_1(), initial_state()} -%% initial_state() = term() -send_req(Url, Headers, Method, Body) -> - send_req(Url, Headers, Method, Body, []). - -%% @doc Same as send_req/4. -%% For a description of SSL Options, look in the <a href="http://www.erlang.org/doc/apps/ssl/index.html">ssl</a> manpage. If the -%% HTTP Version to use is not specified, the default is 1.1. -%% <br/> -%% <p>The <code>host_header</code> option is useful in the case where ibrowse is -%% connecting to a component such as <a -%% href="http://www.stunnel.org">stunnel</a> which then sets up a -%% secure connection to a webserver. In this case, the URL supplied to -%% ibrowse must have the stunnel host/port details, but that won't -%% make sense to the destination webserver. This option can then be -%% used to specify what should go in the <code>Host</code> header in -%% the request.</p> -%% <ul> -%% <li>The <code>stream_to</code> option can be used to have the HTTP -%% response streamed to a process as messages as data arrives on the -%% socket. If the calling process wishes to control the rate at which -%% data is received from the server, the option <code>{stream_to, -%% {process(), once}}</code> can be specified. The calling process -%% will have to invoke <code>ibrowse:stream_next(Request_id)</code> to -%% receive the next packet.</li> -%% -%% <li>When both the options <code>save_response_to_file</code> and <code>stream_to</code> -%% are specified, the former takes precedence.</li> -%% -%% <li>For the <code>save_response_to_file</code> option, the response body is saved to -%% file only if the status code is in the 200-299 range. If not, the response body is returned -%% as a string.</li> -%% <li>Whenever an error occurs in the processing of a request, ibrowse will return as much -%% information as it has, such as HTTP Status Code and HTTP Headers. When this happens, the response -%% is of the form <code>{error, {Reason, {stat_code, StatusCode}, HTTP_headers}}</code></li> -%% -%% <li>The <code>inactivity_timeout</code> option is useful when -%% dealing with large response bodies and/or slow links. In these -%% cases, it might be hard to estimate how long a request will take to -%% complete. In such cases, the client might want to timeout if no -%% data has been received on the link for a certain time interval.</li> -%% -%% <li> -%% The <code>connect_timeout</code> option is to specify how long the -%% client process should wait for connection establishment. This is -%% useful in scenarios where connections to servers are usually setup -%% very fast, but responses might take much longer compared to -%% connection setup. In such cases, it is better for the calling -%% process to timeout faster if there is a problem (DNS lookup -%% delays/failures, network routing issues, etc). The total timeout -%% value specified for the request will enforced. To illustrate using -%% an example: -%% <code> -%% ibrowse:send_req("http://www.example.com/cgi-bin/request", [], get, [], [{connect_timeout, 100}], 1000). -%% </code> -%% In the above invocation, if the connection isn't established within -%% 100 milliseconds, the request will fail with -%% <code>{error, conn_failed}</code>.<br/> -%% If connection setup succeeds, the total time allowed for the -%% request to complete will be 1000 milliseconds minus the time taken -%% for connection setup. -%% </li> -%% </ul> -%% -%% @spec send_req(Url::string(), Headers::headerList(), Method::method(), Body::body(), Options::optionList()) -> response() -%% optionList() = [option()] -%% option() = {max_sessions, integer()} | -%% {response_format,response_format()}| -%% {stream_chunk_size, integer()} | -%% {max_pipeline_size, integer()} | -%% {trace, boolean()} | -%% {is_ssl, boolean()} | -%% {ssl_options, [SSLOpt]} | -%% {pool_name, atom()} | -%% {proxy_host, string()} | -%% {proxy_port, integer()} | -%% {proxy_user, string()} | -%% {proxy_password, string()} | -%% {use_absolute_uri, boolean()} | -%% {basic_auth, {username(), password()}} | -%% {cookie, string()} | -%% {content_length, integer()} | -%% {content_type, string()} | -%% {save_response_to_file, srtf()} | -%% {stream_to, stream_to()} | -%% {http_vsn, {MajorVsn, MinorVsn}} | -%% {host_header, string()} | -%% {inactivity_timeout, integer()} | -%% {connect_timeout, integer()} | -%% {transfer_encoding, {chunked, ChunkSize}} -%% -%% stream_to() = process() | {process(), once} -%% process() = pid() | atom() -%% username() = string() -%% password() = string() -%% SSLOpt = term() -%% ChunkSize = integer() -%% srtf() = boolean() | filename() -%% filename() = string() -%% response_format() = list | binary -send_req(Url, Headers, Method, Body, Options) -> - send_req(Url, Headers, Method, Body, Options, 30000). - -%% @doc Same as send_req/5. -%% All timeout values are in milliseconds. -%% @spec send_req(Url, Headers::headerList(), Method::method(), Body::body(), Options::optionList(), Timeout) -> response() -%% Timeout = integer() | infinity -send_req(Url, Headers, Method, Body, Options, Timeout) -> - case catch parse_url(Url) of - #url{host = Host, - port = Port, - protocol = Protocol} = Parsed_url -> - Lb_pid = case ets:lookup(ibrowse_lb, {Host, Port}) of - [] -> - get_lb_pid(Parsed_url); - [#lb_pid{pid = Lb_pid_1}] -> - Lb_pid_1 - end, - Max_sessions = get_max_sessions(Host, Port, Options), - Max_pipeline_size = get_max_pipeline_size(Host, Port, Options), - Options_1 = merge_options(Host, Port, Options), - {SSLOptions, IsSSL} = - case (Protocol == https) orelse - get_value(is_ssl, Options_1, false) of - false -> {[], false}; - true -> {get_value(ssl_options, Options_1, []), true} - end, - case ibrowse_lb:spawn_connection(Lb_pid, Parsed_url, - Max_sessions, - Max_pipeline_size, - {SSLOptions, IsSSL}) of - {ok, Conn_Pid} -> - do_send_req(Conn_Pid, Parsed_url, Headers, - Method, Body, Options_1, Timeout); - Err -> - Err - end; - Err -> - {error, {url_parsing_failed, Err}} - end. - -merge_options(Host, Port, Options) -> - Config_options = get_config_value({options, Host, Port}, []), - lists:foldl( - fun({Key, Val}, Acc) -> - case lists:keysearch(Key, 1, Options) of - false -> - [{Key, Val} | Acc]; - _ -> - Acc - end - end, Options, Config_options). - -get_lb_pid(Url) -> - gen_server:call(?MODULE, {get_lb_pid, Url}). - -get_max_sessions(Host, Port, Options) -> - get_value(max_sessions, Options, - get_config_value({max_sessions, Host, Port}, ?DEF_MAX_SESSIONS)). - -get_max_pipeline_size(Host, Port, Options) -> - get_value(max_pipeline_size, Options, - get_config_value({max_pipeline_size, Host, Port}, ?DEF_MAX_PIPELINE_SIZE)). - -%% @doc Deprecated. Use set_max_sessions/3 and set_max_pipeline_size/3 -%% for achieving the same effect. -set_dest(Host, Port, [{max_sessions, Max} | T]) -> - set_max_sessions(Host, Port, Max), - set_dest(Host, Port, T); -set_dest(Host, Port, [{max_pipeline_size, Max} | T]) -> - set_max_pipeline_size(Host, Port, Max), - set_dest(Host, Port, T); -set_dest(Host, Port, [{trace, Bool} | T]) when Bool == true; Bool == false -> - ibrowse ! {trace, true, Host, Port}, - set_dest(Host, Port, T); -set_dest(_Host, _Port, [H | _]) -> - exit({invalid_option, H}); -set_dest(_, _, []) -> - ok. - -%% @doc Set the maximum number of connections allowed to a specific Host:Port. -%% @spec set_max_sessions(Host::string(), Port::integer(), Max::integer()) -> ok -set_max_sessions(Host, Port, Max) when is_integer(Max), Max > 0 -> - gen_server:call(?MODULE, {set_config_value, {max_sessions, Host, Port}, Max}). - -%% @doc Set the maximum pipeline size for each connection to a specific Host:Port. -%% @spec set_max_pipeline_size(Host::string(), Port::integer(), Max::integer()) -> ok -set_max_pipeline_size(Host, Port, Max) when is_integer(Max), Max > 0 -> - gen_server:call(?MODULE, {set_config_value, {max_pipeline_size, Host, Port}, Max}). - -do_send_req(Conn_Pid, Parsed_url, Headers, Method, Body, Options, Timeout) -> - case catch ibrowse_http_client:send_req(Conn_Pid, Parsed_url, - Headers, Method, ensure_bin(Body), - Options, Timeout) of - {'EXIT', {timeout, _}} -> - {error, req_timedout}; - {'EXIT', Reason} -> - {error, {'EXIT', Reason}}; - {ok, St_code, Headers, Body} = Ret when is_binary(Body) -> - case get_value(response_format, Options, list) of - list -> - {ok, St_code, Headers, binary_to_list(Body)}; - binary -> - Ret - end; - Ret -> - Ret - end. - -ensure_bin(L) when is_list(L) -> list_to_binary(L); -ensure_bin(B) when is_binary(B) -> B; -ensure_bin(Fun) when is_function(Fun) -> Fun; -ensure_bin({Fun}) when is_function(Fun) -> Fun; -ensure_bin({Fun, _} = Body) when is_function(Fun) -> Body. - -%% @doc Creates a HTTP client process to the specified Host:Port which -%% is not part of the load balancing pool. This is useful in cases -%% where some requests to a webserver might take a long time whereas -%% some might take a very short time. To avoid getting these quick -%% requests stuck in the pipeline behind time consuming requests, use -%% this function to get a handle to a connection process. <br/> -%% <b>Note:</b> Calling this function only creates a worker process. No connection -%% is setup. The connection attempt is made only when the first -%% request is sent via any of the send_req_direct/4,5,6,7 functions.<br/> -%% <b>Note:</b> It is the responsibility of the calling process to control -%% pipeline size on such connections. -%% -%% @spec spawn_worker_process(Host::string(), Port::integer()) -> {ok, pid()} -spawn_worker_process(Host, Port) -> - ibrowse_http_client:start({Host, Port}). - -%% @doc Same as spawn_worker_process/2 except the the calling process -%% is linked to the worker process which is spawned. -spawn_link_worker_process(Host, Port) -> - ibrowse_http_client:start_link({Host, Port}). - -%% @doc Terminate a worker process spawned using -%% spawn_worker_process/2 or spawn_link_worker_process/2. Requests in -%% progress will get the error response <pre>{error, closing_on_request}</pre> -%% @spec stop_worker_process(Conn_pid::pid()) -> ok -stop_worker_process(Conn_pid) -> - ibrowse_http_client:stop(Conn_pid). - -%% @doc Same as send_req/3 except that the first argument is the PID -%% returned by spawn_worker_process/2 or spawn_link_worker_process/2 -send_req_direct(Conn_pid, Url, Headers, Method) -> - send_req_direct(Conn_pid, Url, Headers, Method, [], []). - -%% @doc Same as send_req/4 except that the first argument is the PID -%% returned by spawn_worker_process/2 or spawn_link_worker_process/2 -send_req_direct(Conn_pid, Url, Headers, Method, Body) -> - send_req_direct(Conn_pid, Url, Headers, Method, Body, []). - -%% @doc Same as send_req/5 except that the first argument is the PID -%% returned by spawn_worker_process/2 or spawn_link_worker_process/2 -send_req_direct(Conn_pid, Url, Headers, Method, Body, Options) -> - send_req_direct(Conn_pid, Url, Headers, Method, Body, Options, 30000). - -%% @doc Same as send_req/6 except that the first argument is the PID -%% returned by spawn_worker_process/2 or spawn_link_worker_process/2 -send_req_direct(Conn_pid, Url, Headers, Method, Body, Options, Timeout) -> - case catch parse_url(Url) of - #url{host = Host, - port = Port} = Parsed_url -> - Options_1 = merge_options(Host, Port, Options), - case do_send_req(Conn_pid, Parsed_url, Headers, Method, Body, Options_1, Timeout) of - {error, {'EXIT', {noproc, _}}} -> - {error, worker_is_dead}; - Ret -> - Ret - end; - Err -> - {error, {url_parsing_failed, Err}} - end. - -%% @doc Tell ibrowse to stream the next chunk of data to the -%% caller. Should be used in conjunction with the -%% <code>stream_to</code> option -%% @spec stream_next(Req_id :: req_id()) -> ok | {error, unknown_req_id} -stream_next(Req_id) -> - case ets:lookup(ibrowse_stream, {req_id_pid, Req_id}) of - [] -> - {error, unknown_req_id}; - [{_, Pid}] -> - catch Pid ! {stream_next, Req_id}, - ok - end. - -%% @doc Turn tracing on for the ibrowse process -trace_on() -> - ibrowse ! {trace, true}. -%% @doc Turn tracing off for the ibrowse process -trace_off() -> - ibrowse ! {trace, false}. - -%% @doc Turn tracing on for all connections to the specified HTTP -%% server. Host is whatever is specified as the domain name in the URL -%% @spec trace_on(Host, Port) -> ok -%% Host = string() -%% Port = integer() -trace_on(Host, Port) -> - ibrowse ! {trace, true, Host, Port}, - ok. - -%% @doc Turn tracing OFF for all connections to the specified HTTP -%% server. -%% @spec trace_off(Host, Port) -> ok -trace_off(Host, Port) -> - ibrowse ! {trace, false, Host, Port}, - ok. - -%% @doc Turn Off ALL tracing -%% @spec all_trace_off() -> ok -all_trace_off() -> - ibrowse ! all_trace_off, - ok. - -show_dest_status() -> - Dests = lists:filter(fun({lb_pid, {Host, Port}, _}) when is_list(Host), - is_integer(Port) -> - true; - (_) -> - false - end, ets:tab2list(ibrowse_lb)), - All_ets = ets:all(), - io:format("~-40.40s | ~-5.5s | ~-10.10s | ~s~n", - ["Server:port", "ETS", "Num conns", "LB Pid"]), - io:format("~80.80.=s~n", [""]), - lists:foreach(fun({lb_pid, {Host, Port}, Lb_pid}) -> - case lists:dropwhile( - fun(Tid) -> - ets:info(Tid, owner) /= Lb_pid - end, All_ets) of - [] -> - io:format("~40.40s | ~-5.5s | ~-5.5s | ~s~n", - [Host ++ ":" ++ integer_to_list(Port), - "", - "", - io_lib:format("~p", [Lb_pid])] - ); - [Tid | _] -> - catch ( - begin - Size = ets:info(Tid, size), - io:format("~40.40s | ~-5.5s | ~-5.5s | ~s~n", - [Host ++ ":" ++ integer_to_list(Port), - integer_to_list(Tid), - integer_to_list(Size), - io_lib:format("~p", [Lb_pid])] - ) - end - ) - end - end, Dests). - -%% @doc Shows some internal information about load balancing to a -%% specified Host:Port. Info about workers spawned using -%% spawn_worker_process/2 or spawn_link_worker_process/2 is not -%% included. -show_dest_status(Host, Port) -> - case ets:lookup(ibrowse_lb, {Host, Port}) of - [] -> - no_active_processes; - [#lb_pid{pid = Lb_pid}] -> - io:format("Load Balancer Pid : ~p~n", [Lb_pid]), - io:format("LB process msg q size : ~p~n", [(catch process_info(Lb_pid, message_queue_len))]), - case lists:dropwhile( - fun(Tid) -> - ets:info(Tid, owner) /= Lb_pid - end, ets:all()) of - [] -> - io:format("Couldn't locate ETS table for ~p~n", [Lb_pid]); - [Tid | _] -> - First = ets:first(Tid), - Last = ets:last(Tid), - Size = ets:info(Tid, size), - io:format("LB ETS table id : ~p~n", [Tid]), - io:format("Num Connections : ~p~n", [Size]), - case Size of - 0 -> - ok; - _ -> - {First_p_sz, _} = First, - {Last_p_sz, _} = Last, - io:format("Smallest pipeline : ~1000.p~n", [First_p_sz]), - io:format("Largest pipeline : ~1000.p~n", [Last_p_sz]) - end - end - end. - -%% @doc Clear current configuration for ibrowse and load from the file -%% ibrowse.conf in the IBROWSE_EBIN/../priv directory. Current -%% configuration is cleared only if the ibrowse.conf file is readable -%% using file:consult/1 -rescan_config() -> - gen_server:call(?MODULE, rescan_config). - -%% Clear current configuration for ibrowse and load from the specified -%% file. Current configuration is cleared only if the specified -%% file is readable using file:consult/1 -rescan_config(File) when is_list(File) -> - gen_server:call(?MODULE, {rescan_config, File}). - -%%==================================================================== -%% Server functions -%%==================================================================== - -%%-------------------------------------------------------------------- -%% Function: init/1 -%% Description: Initiates the server -%% Returns: {ok, State} | -%% {ok, State, Timeout} | -%% ignore | -%% {stop, Reason} -%%-------------------------------------------------------------------- -init(_) -> - process_flag(trap_exit, true), - State = #state{}, - put(my_trace_flag, State#state.trace), - put(ibrowse_trace_token, "ibrowse"), - ets:new(ibrowse_lb, [named_table, public, {keypos, 2}]), - ets:new(ibrowse_conf, [named_table, protected, {keypos, 2}]), - ets:new(ibrowse_stream, [named_table, public]), - import_config(), - {ok, #state{}}. - -import_config() -> - case code:priv_dir(ibrowse) of - {error, _} = Err -> - Err; - PrivDir -> - Filename = filename:join(PrivDir, "ibrowse.conf"), - import_config(Filename) - end. - -import_config(Filename) -> - case file:consult(Filename) of - {ok, Terms} -> - ets:delete_all_objects(ibrowse_conf), - Fun = fun({dest, Host, Port, MaxSess, MaxPipe, Options}) - when is_list(Host), is_integer(Port), - is_integer(MaxSess), MaxSess > 0, - is_integer(MaxPipe), MaxPipe > 0, is_list(Options) -> - I = [{{max_sessions, Host, Port}, MaxSess}, - {{max_pipeline_size, Host, Port}, MaxPipe}, - {{options, Host, Port}, Options}], - lists:foreach( - fun({X, Y}) -> - ets:insert(ibrowse_conf, - #ibrowse_conf{key = X, - value = Y}) - end, I); - ({K, V}) -> - ets:insert(ibrowse_conf, - #ibrowse_conf{key = K, - value = V}); - (X) -> - io:format("Skipping unrecognised term: ~p~n", [X]) - end, - lists:foreach(Fun, Terms); - Err -> - Err - end. - -%% @doc Internal export -get_config_value(Key) -> - [#ibrowse_conf{value = V}] = ets:lookup(ibrowse_conf, Key), - V. - -%% @doc Internal export -get_config_value(Key, DefVal) -> - case ets:lookup(ibrowse_conf, Key) of - [] -> - DefVal; - [#ibrowse_conf{value = V}] -> - V - end. - -set_config_value(Key, Val) -> - ets:insert(ibrowse_conf, #ibrowse_conf{key = Key, value = Val}). -%%-------------------------------------------------------------------- -%% 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) -%%-------------------------------------------------------------------- -handle_call({get_lb_pid, #url{host = Host, port = Port} = Url}, _From, State) -> - Pid = do_get_connection(Url, ets:lookup(ibrowse_lb, {Host, Port})), - {reply, Pid, State}; - -handle_call(stop, _From, State) -> - do_trace("IBROWSE shutting down~n", []), - {stop, normal, ok, State}; - -handle_call({set_config_value, Key, Val}, _From, State) -> - set_config_value(Key, Val), - {reply, ok, State}; - -handle_call(rescan_config, _From, State) -> - Ret = (catch import_config()), - {reply, Ret, State}; - -handle_call({rescan_config, File}, _From, State) -> - Ret = (catch import_config(File)), - {reply, Ret, 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(all_trace_off, State) -> - Mspec = [{{ibrowse_conf,{trace,'$1','$2'},true},[],[{{'$1','$2'}}]}], - Trace_on_dests = ets:select(ibrowse_conf, Mspec), - Fun = fun(#lb_pid{host_port = {H, P}, pid = Pid}, _) -> - case lists:member({H, P}, Trace_on_dests) of - false -> - ok; - true -> - catch Pid ! {trace, false} - end; - (_, Acc) -> - Acc - end, - ets:foldl(Fun, undefined, ibrowse_lb), - ets:select_delete(ibrowse_conf, [{{ibrowse_conf,{trace,'$1','$2'},true},[],['true']}]), - {noreply, State}; - -handle_info({trace, Bool}, State) -> - put(my_trace_flag, Bool), - {noreply, State}; - -handle_info({trace, Bool, Host, Port}, State) -> - Fun = fun(#lb_pid{host_port = {H, P}, pid = Pid}, _) - when H == Host, - P == Port -> - catch Pid ! {trace, Bool}; - (_, Acc) -> - Acc - end, - ets:foldl(Fun, undefined, ibrowse_lb), - ets:insert(ibrowse_conf, #ibrowse_conf{key = {trace, Host, Port}, - value = Bool}), - {noreply, State}; - -handle_info(_Info, State) -> - {noreply, State}. - -%%-------------------------------------------------------------------- -%% Function: terminate/2 -%% Description: Shutdown the server -%% Returns: any (ignored by gen_server) -%%-------------------------------------------------------------------- -terminate(_Reason, _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 -%%-------------------------------------------------------------------- -do_get_connection(#url{host = Host, port = Port}, []) -> - {ok, Pid} = ibrowse_lb:start_link([Host, Port]), - ets:insert(ibrowse_lb, #lb_pid{host_port = {Host, Port}, pid = Pid}), - Pid; -do_get_connection(_Url, [#lb_pid{pid = Pid}]) -> - Pid. |