PR53963: don't merge the rewritebase down w/o an opt-in

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1410681 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 9 insertions, 2 deletions

diff --git a/modules/mappers/mod_rewrite.c b/modules/mappers/mod_rewrite.c
index be628cdc18..cd293013d7 100644
--- a/modules/mappers/mod_rewrite.c
+++ b/modules/mappers/mod_rewrite.c
@@ -191,6 +191,7 @@ static const char* really_last_key = "rewrite_really_last";
 #define OPTION_INHERIT_BEFORE       1<<2
 #define OPTION_NOSLASH              1<<3
 #define OPTION_ANYURI               1<<4
+#define OPTION_MERGEBASE            1<<5
 
 #ifndef RAND_MAX
 #define RAND_MAX 32767
@@ -2823,8 +2824,11 @@ static void *config_perdir_merge(apr_pool_t *p, void *basev, void *overridesv)
     a->state_set = overrides->state_set || base->state_set;
     a->options = (overrides->options_set == 0) ? base->options : overrides->options;
     a->options_set = overrides->options_set || base->options_set;
-    a->baseurl = (overrides->baseurl_set == 0) ? base->baseurl : overrides->baseurl;
-    a->baseurl_set = overrides->baseurl_set || base->baseurl_set;
+
+    if (a->options & OPTION_MERGEBASE) { 
+        a->baseurl = (overrides->baseurl_set == 0) ? base->baseurl : overrides->baseurl;
+        a->baseurl_set = overrides->baseurl_set || base->baseurl_set;
+    }
 
     a->directory  = overrides->directory;
 
@@ -2899,6 +2903,9 @@ static const char *cmd_rewriteoptions(cmd_parms *cmd,
         else if (!strcasecmp(w, "allowanyuri")) {
             options |= OPTION_ANYURI;
         }
+        else if (!strcasecmp(w, "mergebase")) {
+            options |= OPTION_MERGEBASE;
+        }
         else {
             return apr_pstrcat(cmd->pool, "RewriteOptions: unknown option '",
                                w, "'", NULL);