diff --git a/include/vlog.hrl b/include/vlog.hrl
index edf33d6..8715876 100644
--- a/include/vlog.hrl
+++ b/include/vlog.hrl
@@ -29,4 +29,8 @@
 
 -define(FMT(S, A), lists:flatten(io_lib:format(S, A))).
 
+% force to string
+-define(LOG_STR(Lvl, X), 
+    vlog:format(Lvl, "~s [~s] {~p, ~p}: ~s~n", 
+    	[?LVLS(Lvl), vlog:time_string(), ?MODULE, ?LINE, X])).
 -endif.
diff --git a/src/http_front/api.erl b/src/http_front/api.erl
index af2f1d8..697bb08 100644
--- a/src/http_front/api.erl
+++ b/src/http_front/api.erl
@@ -13,13 +13,16 @@
 -define(TEXT(Fmt, Args), lists:flatten(io_lib:format(Fmt, Args))).
 -define(MAX_FILE, 3).
 -define(CONTENT_TYPE, "Content-Type: application/json\r\n\r\n").
+-include("vlog.hrl").
 
 % search?q=keyword
-search(SessionID, _Env, Input) ->
+search(SessionID, Env, Input) ->
 	Res = case http_common:get_search_keyword(Input) of
 		[] -> 
 			"{\"error\":\"null input\", \"suggest\":\"api/search?q=keyword\"}";
 		Keyword ->
+			US = http_common:list_to_utf_binary(Keyword),
+			?LOG_STR(?INFO, ?FMT("API: remote ~p search /~s/", [http_common:remote_addr(Env), US])),
 			do_search(Keyword)
 	end,	
 	mod_esi:deliver(SessionID, [?CONTENT_TYPE, Res]).
@@ -48,6 +51,9 @@ stats(SessionID, _Env, _Input) ->
 do_search(Keyword) ->
 	{Rets, Stats} = http_cache:search(Keyword),
 	{_Found, Cost, Scanned} = Stats,
+	CostSecs = Cost / 1000 / 1000,
+	US = http_common:list_to_utf_binary(Keyword),
+	?LOG_STR(?INFO, ?FMT("API: search /~s/ found ~p, cost ~f secs", [US, Scanned, CostSecs])),
 	Tip = ?TEXT("{\"keyword\":\"~s\",\"found\":~p,\"cost\":~p,", [Keyword, Scanned, Cost div 1000]),
 	BodyList = format_search_result(Rets),
 	Body = ?TEXT("\"results\":[~s]}", [BodyList]),
diff --git a/src/http_front/crawler_http.erl b/src/http_front/crawler_http.erl
index 0b0f957..6caa740 100644
--- a/src/http_front/crawler_http.erl
+++ b/src/http_front/crawler_http.erl
@@ -17,6 +17,7 @@
 		 page_temp/0,
 	     stop/0]).
 -record(state, {html_temp, httpid}).
+-include("vlog.hrl").
 
 % start from command line, erl -run crawler_http start localhost 27017 8000 5
 start([DBHostS, DBPortS, PortS, PoolSizeS]) ->
@@ -27,6 +28,8 @@ start([DBHostS, DBPortS, PortS, PoolSizeS]) ->
 	start(DBHost, DBPort, HttpPort, PoolSize).
 
 start(DBHost, DBPort, Port, PoolSize) ->
+	filelib:ensure_dir("log/"),
+	vlog:start_link("log/crawler_http.log", ?INFO),
 	code:add_path("deps/bson/ebin"),
 	code:add_path("deps/mongodb/ebin"),
 	Apps = [crypto, public_key, ssl, inets, bson, mongodb],	
@@ -46,6 +49,7 @@ srv_name() ->
 	crawler_http.
 
 init([DBHost, DBPort, Port, PoolSize]) ->
+	?I(?FMT("httpd startup ~p", [Port])),
 	process_flag(trap_exit, true),
 	db_frontend:start(DBHost, DBPort, PoolSize),
 	http_cache:start_link(),
diff --git a/src/http_front/http_common.erl b/src/http_front/http_common.erl
index fd63263..74cd965 100644
--- a/src/http_front/http_common.erl
+++ b/src/http_front/http_common.erl
@@ -6,8 +6,13 @@
 -module(http_common).
 -export([get_search_keyword/1,
 		 get_view_hash/1,
+		 remote_addr/1,
+		 list_to_utf_binary/1,
 		 sort_file_by_size/1]).
 
+remote_addr(Env) ->
+	proplists:get_value(remote_addr, Env).
+
 get_search_keyword(Input) ->
 	get_q_arg(Input).
 
@@ -28,3 +33,13 @@ sort_file_by_size(Files) ->
 	lists:sort(fun({_, L1}, {_, L2}) ->
 		L1 > L2
 	end, Files).
+
+% io:format("~ts", [list_to_utf_binary(L)])
+% io:format(FP, "~s", [list_to_utf_binary(L)])
+list_to_utf_binary(L) ->	
+	BK = list_to_binary(L),
+	UL = unicode:characters_to_list(BK),
+	US = unicode:characters_to_binary(UL),
+	US.
+
+
diff --git a/src/http_front/http_handler.erl b/src/http_front/http_handler.erl
index 5f80d8c..d7db7ff 100644
--- a/src/http_front/http_handler.erl
+++ b/src/http_front/http_handler.erl
@@ -15,12 +15,15 @@
 -define(TEXT(Fmt, Args), lists:flatten(io_lib:format(Fmt, Args))).
 -import(torrent_file, [size_string/1]).
 -define(CONTENT_TYPE, "Content-Type: text/html\r\n\r\n").
+-include("vlog.hrl").
 
-search(SessionID, _Env, Input) ->
+search(SessionID, Env, Input) ->
 	{K, Body} = case http_common:get_search_keyword(Input) of
 		[] -> 
 			{"", "invalid input"};
 		Key ->
+			US = http_common:list_to_utf_binary(Key),
+			?LOG_STR(?INFO, ?FMT("remote ~p search /~s/", [http_common:remote_addr(Env), US])),
 			{Key, do_search(Key)}
 	end,
 	Response = simple_html(K, Body),
@@ -87,8 +90,11 @@ do_search(Keyword) when length(Keyword) =< 1 ->
 do_search(Keyword) ->
 	{Rets, Stats} = http_cache:search(Keyword),
 	{_Found, Cost, Scanned} = Stats,
+	CostSecs = Cost / 1000 / 1000,
+	US = http_common:list_to_utf_binary(Keyword),
+	?LOG_STR(?INFO, ?FMT("search /~s/ found ~p, cost ~f secs", [US, Scanned, CostSecs])),
 	Tip = ?TEXT("<h4>search ~s, ~b results, ~f seconds</h4>", 
-		[Keyword, Scanned, Cost / 1000 / 1000]),
+		[Keyword, Scanned, CostSecs ]),
 	BodyList = format_search_result(Rets),
 	Body = ?TEXT("<ol>~s</ol>", [lists:flatten(BodyList)]),
 	Tip ++ Body.