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authorMicael Karlberg <[email protected]>2012-05-22 17:37:33 +0200
committerMicael Karlberg <[email protected]>2012-05-22 17:37:33 +0200
commit022bc68b6dd10624b58779dc2b3b0e392e3e04f5 (patch)
tree60c818aef959b24f83a21b857dc906406b3c16d9 /lib
parentef14221acafe78b7a77b5d42b6a615fa7333750d (diff)
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[inets/httpc] Better handling of session db update failure
A failure to update the session database will now result in an informative error message and a controlled (handler) exit rather then an ugly crash. Also debug functions to retrieve sessions info and updated the info function with more info (sessions and options). OTP-10093
Diffstat (limited to 'lib')
-rw-r--r--lib/inets/src/http_client/httpc.erl26
-rw-r--r--lib/inets/src/http_client/httpc_handler.erl27
-rw-r--r--lib/inets/src/http_client/httpc_manager.erl92
3 files changed, 135 insertions, 10 deletions
diff --git a/lib/inets/src/http_client/httpc.erl b/lib/inets/src/http_client/httpc.erl
index f4802fb96d..b6e7708353 100644
--- a/lib/inets/src/http_client/httpc.erl
+++ b/lib/inets/src/http_client/httpc.erl
@@ -39,6 +39,7 @@
cookie_header/1, cookie_header/2, cookie_header/3,
which_cookies/0, which_cookies/1,
reset_cookies/0, reset_cookies/1,
+ which_sessions/0, which_sessions/1,
stream_next/1,
default_profile/0,
profile_name/1, profile_name/2,
@@ -267,6 +268,7 @@ set_option(Key, Value, Profile) ->
%% Reason - term()
%% Description: Retrieves the current options.
%%-------------------------------------------------------------------------
+
get_options() ->
record_info(fields, options).
@@ -373,8 +375,6 @@ cookie_header(Url, Opts, Profile)
{error, {not_started, Profile}}
end.
-
-
%%--------------------------------------------------------------------------
%% which_cookies() -> [cookie()]
@@ -398,6 +398,28 @@ which_cookies(Profile) ->
%%--------------------------------------------------------------------------
+%% which_sessions() -> {GoodSession, BadSessions, NonSessions}
+%% which_sessions(Profile) -> {GoodSession, BadSessions, NonSessions}
+%%
+%% Description: Debug function, dumping the sessions database, sorted
+%% into three groups (Good-, Bad- and Non-sessions).
+%%-------------------------------------------------------------------------
+which_sessions() ->
+ which_sessions(default_profile()).
+
+which_sessions(Profile) ->
+ ?hcrt("which sessions", [{profile, Profile}]),
+ try
+ begin
+ httpc_manager:which_sessions(profile_name(Profile))
+ end
+ catch
+ exit:{noproc, _} ->
+ {[], [], []}
+ end.
+
+
+%%--------------------------------------------------------------------------
%% info() -> list()
%% info(Profile) -> list()
%%
diff --git a/lib/inets/src/http_client/httpc_handler.erl b/lib/inets/src/http_client/httpc_handler.erl
index b8c34bd99b..6fe05dec80 100644
--- a/lib/inets/src/http_client/httpc_handler.erl
+++ b/lib/inets/src/http_client/httpc_handler.erl
@@ -1713,7 +1713,32 @@ update_session(ProfileName, #session{id = SessionId} = Session, Pos, Value) ->
catch
error:undef -> % This could happen during code upgrade
Session2 = erlang:setelement(Pos, Session, Value),
- insert_session(Session2, ProfileName)
+ insert_session(Session2, ProfileName);
+ T:E ->
+ error_logger:error_msg("Failed updating session: "
+ "~n ProfileName: ~p"
+ "~n SessionId: ~p"
+ "~n Pos: ~p"
+ "~n Value: ~p"
+ "~nwhen"
+ "~n Session (db) info: ~p"
+ "~n Session (db): ~p"
+ "~n Session (record): ~p"
+ "~n T: ~p"
+ "~n E: ~p",
+ [ProfileName, SessionId, Pos, Value,
+ (catch httpc_manager:which_session_info(ProfileName)),
+ Session,
+ (catch httpc_manager:lookup_session(ProfileName, SessionId)),
+ T, E]),
+ exit({failed_updating_session,
+ [{profile, ProfileName},
+ {session_id, SessionId},
+ {pos, Pos},
+ {value, Value},
+ {etype, T},
+ {error, E},
+ {stacktrace, erlang:get_stacktrace()}]})
end.
diff --git a/lib/inets/src/http_client/httpc_manager.erl b/lib/inets/src/http_client/httpc_manager.erl
index 771968e169..3612b331e7 100644
--- a/lib/inets/src/http_client/httpc_manager.erl
+++ b/lib/inets/src/http_client/httpc_manager.erl
@@ -34,8 +34,11 @@
retry_request/2,
redirect_request/2,
insert_session/2,
+ lookup_session/2,
update_session/4,
delete_session/2,
+ which_sessions/1,
+ which_session_info/1,
set_options/2,
get_options/2,
store_cookies/3,
@@ -187,13 +190,28 @@ insert_session(Session, ProfileName) ->
%%--------------------------------------------------------------------
+%% Function: lookup_session(SessionId, ProfileName) -> _
+%% SessionId - term()
+%% ProfileName - atom()
+%%
+%% Description: Looks up a session record in the httpc manager
+%% table <ProfileName>__session_db.
+%%--------------------------------------------------------------------
+
+lookup_session(SessionId, ProfileName) ->
+ SessionDbName = session_db_name(ProfileName),
+ ?hcrt("lookup session", [{session_id, SessionId}, {profile, ProfileName}]),
+ ets:lookup(SessionDbName, SessionId).
+
+
+%%--------------------------------------------------------------------
%% Function: update_session(ProfileName, SessionId, Pos, Value) -> _
%% Session - #session{}
%% ProfileName - atom()
%%
%% Description: Update, only one field (Pos) of the session record
%% identified by the SessionId, the session information
-%% of the httpc manager table <ProfileName>_session_db.
+%% of the httpc manager table <ProfileName>__session_db.
%% Intended to be called by the httpc request handler process.
%%--------------------------------------------------------------------
@@ -208,12 +226,12 @@ update_session(ProfileName, SessionId, Pos, Value) ->
%%--------------------------------------------------------------------
-%% Function: delete_session(SessionId, ProfileName) -> _
+%% Function: delete_session(SessionId, ProfileName) -> void()
%% SessionId - {{Host, Port}, HandlerPid}
%% ProfileName - atom()
%%
%% Description: Deletes session information from the httpc manager
-%% table httpc_manager_session_db_<Profile>. Intended to be called by
+%% table <ProfileName>__session_db. Intended to be called by
%% the httpc request handler process.
%%--------------------------------------------------------------------
@@ -224,6 +242,57 @@ delete_session(SessionId, ProfileName) ->
%%--------------------------------------------------------------------
+%% Function: which sessions(ProfileName) -> SessionsInfo
+%% ProfileName - atom()
+%% SessionsInfo - {GoodSessions, BadSessions, NonSessions}
+%% GoodSessions - [#session{}]
+%% BadSessions - [tuple()]
+%% NonSessions - [term()]
+%%
+%% Description: Produces a list of all sessions in the session db.
+%% Used for debugging and since that is the intent, there is some
+%% checking and transforming done, which produces the results.
+%%--------------------------------------------------------------------
+
+which_sessions(ProfileName) ->
+ ?hcrt("which_sessions", [{profile, ProfileName}]),
+ SessionDbName = session_db_name(ProfileName),
+ which_sessions2(SessionDbName).
+
+which_sessions2(SessionDbName) ->
+ Sessions = which_sessions_order(ets:tab2list(SessionDbName)),
+ GoodSessions = [GoodSession || {good_session, GoodSession} <- Sessions],
+ BadSessions = [BadSession || {bad_session, BadSession} <- Sessions],
+ NonSessions = [NonSession || {non_session, NonSession} <- Sessions],
+ {lists:keysort(#session.id, GoodSessions),
+ lists:keysort(#session.id, BadSessions),
+ lists:sort(NonSessions)}.
+
+which_sessions_order([]) ->
+ [];
+which_sessions_order([Session|Sessions]) when is_record(Session, session) ->
+ [{good_session, Session} | which_sessions_order(Sessions)];
+which_sessions_order([BadSession|Sessions])
+ when is_tuple(BadSession) andalso
+ (element(1, BadSession) =:= session) ->
+ [{bad_session, BadSession} | which_sessions_order(Sessions)];
+which_sessions_order([NonSession|Sessions]) ->
+ [{non_session, NonSession} | which_sessions_order(Sessions)].
+
+
+%%--------------------------------------------------------------------
+%% Function: which session_info(ProfileName) -> list()
+%%
+%% Description: Produces a ets table info list of the sessions table
+%%--------------------------------------------------------------------
+
+which_session_info(ProfileName) ->
+ SessionDbName = session_db_name(ProfileName),
+ ?hcrt("which_session_info", [{profile, ProfileName}]),
+ ets:info(SessionDbName).
+
+
+%%--------------------------------------------------------------------
%% Function: set_options(Options, ProfileName) -> ok
%%
%% Options = [Option]
@@ -449,8 +518,8 @@ handle_call({which_cookies, Url, Options}, _,
handle_call({get_options, OptionItems}, _, #state{options = Options} = State) ->
?hcrv("get options", [{option_items, OptionItems}]),
- Reply = [{OptionItem, get_option(OptionItem, Options)} || OptionItem <-
- OptionItems],
+ Reply = [{OptionItem, get_option(OptionItem, Options)} ||
+ OptionItem <- OptionItems],
{reply, Reply, State};
handle_call(info, _, State) ->
@@ -665,10 +734,19 @@ update_session_table(SessionDB, Key, Transform) ->
%%--------------------------------------------------------------------
get_manager_info(#state{handler_db = HDB,
- cookie_db = CDB} = _State) ->
+ session_db = SDB,
+ cookie_db = CDB,
+ options = Options} = _State) ->
HandlerInfo = get_handler_info(HDB),
+ SessionInfo = which_sessions2(SDB),
+ OptionsInfo =
+ [{Item, get_option(Item, Options)} ||
+ Item <- record_info(fields, options)],
CookieInfo = httpc_cookie:which_cookies(CDB),
- [{handlers, HandlerInfo}, {cookies, CookieInfo}].
+ [{handlers, HandlerInfo},
+ {sessions, SessionInfo},
+ {options, OptionsInfo},
+ {cookies, CookieInfo}].
sort_handlers(Unsorted) ->
sort_handlers2(lists:keysort(1, Unsorted)).