Fix pre-loading into daemon process in different virtual host.

Author: GrahamDumpleton

docs/release-notes/version-4.5.16.rst

@@ -18,6 +18,13 @@ Bugs Fixed
   was not resulting in daemon processes being restarted when the WSGI script
   file could not be loaded successfully by the specified timeout.
 
+* When using ``WSGIImportScript``, or ``WSGIScriptAlias`` with both the
+  ``process-group`` and ``application-group`` options, with the intent of
+  preloading a WSGI script file, the ability to reach across to a daemon
+  process defined in a different virtual host with same ``ServerName`` was
+  always failing and the target daemon process group would be flagged as
+  not accessible when instead it should have been.
+
 New Features
 ------------
 

src/server/mod_wsgi.c

@@ -4621,8 +4621,28 @@ static const char *wsgi_add_script_alias(cmd_parms *cmd, void *mconfig,
             if (!group)
                 return "WSGI process group not yet configured.";
 
-            if (group->server != cmd->server && group->server->is_virtual)
+            if (cmd->server->server_hostname &&
+                group->server->server_hostname &&
+                strcmp(cmd->server->server_hostname,
+                group->server->server_hostname) &&
+                group->server->is_virtual) {
+
                 return "WSGI process group not accessible.";
+            }
+
+            if (!cmd->server->server_hostname &&
+                group->server->server_hostname &&
+                group->server->is_virtual) {
+
+                return "WSGI process group not matchable.";
+            }
+
+            if (cmd->server->server_hostname &&
+                !group->server->server_hostname &&
+                group->server->is_virtual) {
+
+                return "WSGI process group not matchable.";
+            }
         }
 #endif
     }
@@ -5128,8 +5148,28 @@ static const char *wsgi_add_import_script(cmd_parms *cmd, void *mconfig,
         if (!group)
             return "WSGI process group not yet configured.";
 
-        if (group->server != cmd->server && group->server->is_virtual)
+        if (cmd->server->server_hostname &&
+            group->server->server_hostname &&
+            strcmp(cmd->server->server_hostname,
+            group->server->server_hostname) &&
+            group->server->is_virtual) {
+
             return "WSGI process group not accessible.";
+        }
+
+        if (!cmd->server->server_hostname &&
+            group->server->server_hostname &&
+            group->server->is_virtual) {
+
+            return "WSGI process group not matchable.";
+        }
+
+        if (cmd->server->server_hostname &&
+            !group->server->server_hostname &&
+            group->server->is_virtual) {
+
+            return "WSGI process group not matchable.";
+        }
     }
 #else
     object->process_group = "";