Strip leading and trailing whitespace from x-name-prefix values

Author: michaelklishin

deps/rabbit/src/rabbit_amqqueue.erl

@@ -366,10 +366,15 @@ is_server_named_allowed(Args) ->
     {ok, binary()} | {error, {prefix_too_long, binary()}}.
 server_named_queue_prefix(Args) ->
     case rabbit_misc:table_lookup(Args, <<"x-name-prefix">>) of
-        {longstr, Prefix} when Prefix =/= <<>> ->
-            case byte_size(Prefix) =< 64 of
-                true  -> {ok, Prefix};
-                false -> {error, {prefix_too_long, Prefix}}
+        {longstr, Prefix0} ->
+            case string:trim(Prefix0) of
+                <<>> ->
+                    {ok, <<"amq.gen">>};
+                Prefix ->
+                    case byte_size(Prefix) =< 64 of
+                        true  -> {ok, Prefix};
+                        false -> {error, {prefix_too_long, Prefix}}
+                    end
             end;
         _ ->
             {ok, <<"amq.gen">>}