+(defun header-lines-matching (key headers)
+ (loop for hdr in headers
+ when (eq key (car hdr))
+ collect (cdr hdr)))
+
+(defun set-cookies-in-headers (headers)
+ (header-lines-matching :set-cookie headers))
+
+(defun cookies-in-headers (headers)
+ (header-lines-matching :cookie headers))
+