From 50d40fd0bf6c796e7acf20fc2ca377cfca734251 Mon Sep 17 00:00:00 2001
From: Ahmed Omar <spawn.think@gmail.com>
Date: Thu, 16 Dec 2010 11:45:10 +0100
Subject: Fixes a bug found in percept:stop_webserver/1, where it doesn't stop
 the webserver completely

percept:stop_webserver/1 will only stop the httpd service in inets, but not the percept_httpd process. As a result, when trying to start the webserver again it will return {error, already_started}. Test case was updated to simulate this case and fix is included to stop the webserver in a consistent way wether stop_webserver/0 or stop_webserver/1 was used.
---
 lib/percept/src/percept.erl        | 32 ++++++++++++++++++++++----------
 lib/percept/test/percept_SUITE.erl |  2 ++
 2 files changed, 24 insertions(+), 10 deletions(-)

diff --git a/lib/percept/src/percept.erl b/lib/percept/src/percept.erl
index f5e0f7e469..3a2d9f7601 100644
--- a/lib/percept/src/percept.erl
+++ b/lib/percept/src/percept.erl
@@ -185,10 +185,27 @@ stop_webserver() ->
     	undefined -> 
 	    {error, not_started};
 	Pid ->
-	    Pid ! {self(), get_port},
-	    receive Port -> ok end,
-	    Pid ! quit,
-	    stop_webserver(Port)
+            do_stop([], Pid)
+    end.
+
+do_stop([], Pid)->
+    Pid ! {self(), get_port},
+    Port = receive P -> P end,
+    do_stop(Port, Pid);
+do_stop(Port, [])->
+    case whereis(percept_httpd) of
+        undefined ->
+            {error, not_started};
+        Pid ->
+            do_stop(Port, Pid)
+    end;
+do_stop(Port, Pid)->
+    case find_service_pid_from_port(inets:services_info(), Port) of
+        undefined ->
+            {error, not_started};
+        Pid2 ->
+            Pid ! quit,
+            inets:stop(httpd, Pid2)
     end.
 
 %% @spec stop_webserver(integer()) -> ok | {error, not_started}
@@ -196,12 +213,7 @@ stop_webserver() ->
 %% @hidden
 
 stop_webserver(Port) ->
-    case find_service_pid_from_port(inets:services_info(), Port) of
-	undefined ->
-	    {error, not_started};
-	Pid ->
-	    inets:stop(httpd, Pid)
-    end. 
+    do_stop(Port,[]).
 
 %%==========================================================================
 %%
diff --git a/lib/percept/test/percept_SUITE.erl b/lib/percept/test/percept_SUITE.erl
index ff7cccdaa8..803ce6b95f 100644
--- a/lib/percept/test/percept_SUITE.erl
+++ b/lib/percept/test/percept_SUITE.erl
@@ -70,6 +70,8 @@ webserver(Config) when is_list(Config) ->
     % Explicit start inets?
     ?line {started, _, Port} = percept:start_webserver(),
     ?line ok = percept:stop_webserver(Port), 
+    ?line {started, _, NewPort} = percept:start_webserver(),
+    ?line ok = percept:stop_webserver(NewPort),
     ?line application:stop(inets),
     ok.
 
-- 
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