commit 7f477d65750b88f49b9fe17880f8862d8809248a
author Jeff Kaufman <jefftk@google.com> Wed Jul 22 10:32:41 2015 -0400
committer Jeff Kaufman <jefftk@google.com> Wed Jul 22 10:32:41 2015 -0400
tree 2d04b5bdae8bf7dc207e17169a2f66457b8e6e0b
parent cc10f15f53dcfc536322e4fe0b8ec0be7179f070

config: whitelist a few more directives for script variables

When configuring downstream caching if you have an origin with multiple caches in front of it you might want to choose how you handle requests in response to which cache you're getting them from.  Whitelist DownstreamCachePurgeLocationPrefix, DownstreamCachePurgeMethod, and DownstreamCacheRewrittenPercentageThreshold for scripting so this is possible.

src/ngx_rewrite_options.cc

diff --git a/src/ngx_rewrite_options.cc b/src/ngx_rewrite_options.cc
index 3ff44f7..2cebb2c 100644
--- a/src/ngx_rewrite_options.cc
+++ b/src/ngx_rewrite_options.cc
@@ -280,7 +280,11 @@
   // as browsers might be able to manipulate its natural use-case: $http_host.
   if (!StringCaseStartsWith(directive, "LoadFromFile") &&
       !StringCaseEqual(directive, "EnableFilters") &&
-      !StringCaseEqual(directive, "DisableFilters")) {
+      !StringCaseEqual(directive, "DisableFilters") &&
+      !StringCaseEqual(directive, "DownstreamCachePurgeLocationPrefix") &&
+      !StringCaseEqual(directive, "DownstreamCachePurgeMethod") &&
+      !StringCaseEqual(directive,
+                       "DownstreamCacheRewrittenPercentageThreshold")) {
     compile_scripts = false;
   }