[ruby/webrick] Remove the squishing of whitespace in header values

While the stripping of header values is required by RFC 2616 4.2 and
RFC 7230 3.2.4, the squishing is not and can break things, such as
when one header contains an HMAC of another header.

Fixes Ruby Bug 7021.

https://github.com/ruby/webrick/commit/8b96088a86

1 files changed, 1 insertions, 4 deletions

diff --git a/lib/webrick/httputils.rb b/lib/webrick/httputils.rb
index 3a2891900f..76d4bd0dc7 100644
--- a/lib/webrick/httputils.rb
+++ b/lib/webrick/httputils.rb
@@ -162,10 +162,7 @@ module WEBrick
         end
       }
       header.each{|key, values|
-        values.each{|value|
-          value.strip!
-          value.gsub!(/\s+/, " ")
-        }
+        values.each(&:strip!)
       }
       header
     end