[PATCH] http: reject non-LWS CTL chars (0..31 + 127) in field values

[Eric Wong <e@80x24.org>]

RFC 2616 doesn't appear to allow most CTL bytes even though
Mongrel always did.  Rack::Lint disallows 0..31, too, though we
allow "\t" (HT, 09) since it's LWS and allowed by RFC 2616.
---
 ext/kcar/kcar_http_common.rl | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/ext/kcar/kcar_http_common.rl b/ext/kcar/kcar_http_common.rl
index 36752b0..cb89248 100644
--- a/ext/kcar/kcar_http_common.rl
+++ b/ext/kcar/kcar_http_common.rl
@@ -21,6 +21,7 @@
   pchar = (uchar | ":" | "@" | "&" | "=" | "+");
   tspecials = ("(" | ")" | "<" | ">" | "@" | "," | ";" | ":" | "\\" | "\"" | "/" | "[" | "]" | "?" | "=" | "{" | "}" | " " | "\t");
   lws = (" " | "\t");
+  content = ((any -- CTL) | lws);
 
 # elements
   token = (ascii -- (CTL | tspecials));
@@ -32,9 +33,9 @@
 
   field_name = ( token -- ":" )+ >start_field %write_field;
 
-  field_value = any* >start_value %write_value;
+  field_value = content* >start_value %write_value;
 
-  value_cont = lws+ any* >start_value %write_cont_value;
+  value_cont = lws+ content* >start_value %write_cont_value;
 
   message_header = ((field_name ":" lws* field_value)|value_cont) :> CRLF;
   chunk_ext_val = token*;
-- 
EW