http: support for multi-line HTTP headers

While I still consider pound to be irrelevant, but I still
sometimes get hand-crafted HTTP requests that come in with
multiline headers.  Since these are part of the HTTP specs and
not difficult to support, we might as well support them for
the sake of completeness.

1 files changed, 4 insertions, 1 deletions

diff --git a/ext/unicorn_http/unicorn_http_common.rl b/ext/unicorn_http/unicorn_http_common.rl
index f1ed138..9b51ba1 100644
--- a/ext/unicorn_http/unicorn_http_common.rl
+++ b/ext/unicorn_http/unicorn_http_common.rl
@@ -19,6 +19,7 @@
   uchar = (unreserved | escape | sorta_safe);
   pchar = (uchar | ":" | "@" | "&" | "=" | "+");
   tspecials = ("(" | ")" | "<" | ">" | "@" | "," | ";" | ":" | "\\" | "\"" | "/" | "[" | "]" | "?" | "=" | "{" | "}" | " " | "\t");
+  lws = (" " | "\t");
 
 # elements
   token = (ascii -- (CTL | tspecials));
@@ -49,7 +50,9 @@
 
   field_value = any* >start_value %write_value;
 
-  message_header = field_name ":" " "* field_value :> CRLF;
+  value_cont = lws+ any* >start_value %write_cont_value;
+
+  message_header = ((field_name ":" " "* field_value)|value_cont) :> CRLF;
   chunk_ext_val = token*;
   chunk_ext_name = token*;
   chunk_extension = ( ";" " "* chunk_ext_name ("=" chunk_ext_val)? )*;