Merge pull request #136 from jcmuller/fix-regex-catastrophic-backtrac…

…king-fix Replace regex without catastrophic backtracking
rack · Oct 1, 2017 · 5cbbfb8 · 5cbbfb8
2 parents 624bf9b + 32d8a02
commit 5cbbfb8
Showing 1 changed file with 1 addition and 2 deletions.
diff --git a/lib/rack/contrib/jsonp.rb b/lib/rack/contrib/jsonp.rb
@@ -7,8 +7,7 @@ module Rack
   class JSONP
     include Rack::Utils
 
-    VALID_JS_VAR    = /[a-zA-Z_$][\w$]*/
-    VALID_CALLBACK  = /\A#{VALID_JS_VAR}(?:\.?#{VALID_JS_VAR})*\z/
+    VALID_CALLBACK = /\A[a-zA-Z_$](?:\.?[\w$])*\z/
 
     # These hold the Unicode characters \u2028 and \u2029.
     #