1. http headers container added

2. preliminary cookies support
3. absolutely useless http_quoted_string and http_quote utility functions added

10 files changed, 757 insertions, 2 deletions

diff --git a/include/Makefile.am b/include/Makefile.am
index e0b778b..ee5cd51 100644
--- a/include/Makefile.am
+++ b/include/Makefile.am
@@ -1,7 +1,9 @@
 nobase_include_HEADERS = \
     kingate/cgi_gateway.h \
     kingate/cgi_interface.h \
     kingate/fastcgi.h \
     kingate/exception.h \
     kingate/util.h \
-    kingate/plaincgi.h
+    kingate/plaincgi.h \
+    kingate/cookies.h \
+    kingate/headers.h
diff --git a/include/kingate/cgi_gateway.h b/include/kingate/cgi_gateway.h
index a5c4056..f20d72b 100644
--- a/include/kingate/cgi_gateway.h
+++ b/include/kingate/cgi_gateway.h
@@ -1,269 +1,274 @@
 #ifndef __KINGATE_CGI_GATEWAY_H
 #define __KINGATE_CGI_GATEWAY_H
 
 #include <map>
 #include "kingate/cgi_interface.h"
+#include "kingate/cookies.h"
 
 #ifndef __deprecated
 #if ( __GNUC__ == 3 && __GNUC_MINOR__ > 0 ) || __GNUC__ > 3
 #define __deprecated    __attribute__((deprecated))
 #else
 #define __deprecated
 #endif
 #endif
 
 /**
  * @file
  * @brief the cgi_gateway -- main interface to CGI.
  */
 
 namespace kingate {
     using namespace std;
 
     /**
      * The main class interfacing with the CGI environment.
      */
     class cgi_gateway {
         public:
             /**
              * The interface to CGI environment (e.g. fastcgi).
              */
             cgi_interface& iface;
             /**
              * The type describing map holding parameters parsed from query string or input.
              */
             typedef multimap<string,string> params_t;
             /**
              * The GET-passed parameters.
              */
             params_t get;
             /**
              * The POST-passed parameters.
              */
             params_t post;
             /**
+             * Cookies passed.
+             */
+            cookies_t cookies;
+            /**
              * Was the stdin content parsed?
              */
             bool b_parsed_content;
 
             /**
              * @param ci the interface to use.
              */
             cgi_gateway(cgi_interface& ci);
 
             /**
              * Check whether there is an 'environment' meta-variable with specific name
              * passed to CGI.
              * @param n variable name.
              * @return true if yes.
              * @see cgi_interface::has_meta()
              * @see get_meta()
              */
             bool has_meta(const string& n) const { return iface.has_meta(n); }
             /**
              * Retrieve the 'environment' meta-variable value.
              * @param n variable name.
              * @return variable contents.
              * @see exception_notfound
              * @see cgi_interface::get_meta()
              */
             const string& get_meta(const string& n) const { return iface.get_meta(n); }
 
             /**
              * fetch reference to the 'stdin' stream.
              * @return the reference to the corresponding istream object.
              * @see cgi_interface::in()
              */
             istream& in() { return iface.in(); }
             /**
              * fetch reference to the 'stdout' stream.
              * @return the reference to the corresponding ostream object.
              * @see cgi_interface::out()
              */
             ostream& out() { return iface.out(); }
             /**
              * fetch reference to the 'stderr' stream.
              * @return the reference to the corresponding ostream object.
              * @see cgi_interface::err()
              */
             ostream& err() { return iface.err(); }
             /**
              * cast to the ostream -- fetches the reference to the 'stdout'
              * stream.
              * @see out()
              */
             operator ostream& (void) { return out(); }
 
             /**
              * Check to see whether the parameter was passed via GET.
              * @param n the parameter name.
              * @return true if yes.
              */
             bool has_GET(const string& n) const;
             /**
              * Retrieve the parameter passed via GET.
              * @param n the parameter name.
              * @return the parameter contents.
              * @see exception_notfound
              */
             const string& get_GET(const string& n) const;
             /**
              * Check to see whether the parameter was passed via POST.
              * @param n the parameter name.
              * @return true if yes.
              */
             bool has_POST(const string& n) const;
             /**
              * Retrieve the POST-parameter.
              * @param n the parameter name.
              * @return the parameter contents.
              * @see exception_notfound
              */
             const string& get_POST(const string& n) const;
             /**
              * Check to see whether the parameter was passed either via POST or
              * GET.
              * @param n the parameter name.
              * @return true if yes.
              */
             bool has_param(const string& n) const;
             /**
              * Retrieve the parameter passed either via POST or GET
              * (GET-parameter takes precedence).
              * @param n the parameter name.
              * @return true if yes.
              * @see exception_notfound.
              */
             const string& get_param(const string& n) const;
 
             /**
              * Retrieve the POST content-type (as passed via CONTENT_TYPE
              * environment variable).
              * @return the content type.
              */
             const string& __deprecated get_content_type() const;
             /**
              * Retrieve the POST content length (as passed via the
              * CONTENT_LENGTH environment variable).
              * @return the content length.
              */
             unsigned long __deprecated get_content_length() const;
 
             /**
              * Check to see whether the content from stdin stream was parsed.
              * @return true if yes.
              */
             bool is_content_parsed() const { return b_parsed_content; }
 
             /**
              * Retrieve the HTTP header value from the HTTP_ meta-variable.
              * (see RFC3875)
              * @param hn header field name.
              * @return the HTTP header value.
              */
             const string& http_request_header(const string& hn) const;
 
             /**
              * Retrieve the AUTH_TYPE meta-variable (see RFC3875)
              * @return authentication type.
              */
             const string& auth_type() const;
             /**
              * Retrieve the CONTENT_LENGTH meta-variable (see RFC3875)
              * @return size of the request message body.
              */
             unsigned long cgi_gateway::content_length() const;
             /**
              * Retrieve the CONTENT_TYPE meta-variable (see RFC3875)
              * @return media type of the request message body.
              */
             const string& content_type() const;
             /**
              * Retrieve the GATEWAY_INTERFACE meta-variable (see RFC3875)
              * @return the gateway interface dialect.
              */
             const string& gateway_interface() const;
             /**
              * Retrieve the PATH_INFO meta-variable (see RFC3875)
              * @return path to be interpreted by the script.
              */
             const string& path_info() const;
             /**
              * Retrieve the PATH_TRANSLATED meta-variable (see RFC3875)
              * @return the translated path to the document.
              */
             const string& path_translated() const;
             /**
              * Retrieve the QUERY_STRING meta-variable (see RFC3875)
              * @return the query string.
              */
             const string& query_string() const;
             /**
              * Retrieve the REMOTE_ADDR meta-variable (see RFC3875)
              * @return the network address of the remote host.
              */
             const string& remote_addr() const;
             /**
              * Retrieve the REMOTE_HOST meta-variable (see RFC3875)
              * @return the fully qualified domain name of the client if
              * available. REMOTE_ADDR otherwise.
              * @see remote_addr()
              */
             const string& remote_host() const;
             /**
              * Retrieve the REMOTE_IDENT meta-variable (see RFC3875)
              * @return remote user identity (see RFC1413).
              */
             const string& remote_ident() const;
             /**
              * Retrieve the REMOTE_USER meta-variable (see RFC3875)
              * @return the authenticated user name.
              */
             const string& remote_user() const;
             /**
              * Retrieve the REQUEST_METHOD meta-variable (see RFC3875)
              * @return the http request method.
              */
             const string& request_method() const;
             /**
              * Retrieve the SCRIPT_NAME meta-variable (see RFC3875)
              * @return the uri path identifying the script.
              */
             const string& script_name() const;
             /**
              * Retrieve the SERVER_NAME meta-variable (see RFC3875)
              * @return the server name of the script.
              */
             const string& server_name() const;
             /**
              * Retrieve the SERVER_PORT meta-variable (see RFC3875)
              * @return the port on which request was received.
              */
             unsigned int server_port() const;
             /**
              * Retrieve the SERVER_PROTOCOL meta-variable (see RFC3875)
              * @return the protocol used for the request.
              */
             const string& server_protocol() const;
             /**
              * Retrieve the SERVER_SOFTWARE meta-variable (see RFC3875)
              * @return the name and version of server software.
              */
             const string& server_software() const;
 
         private:
             /**
              * Parse the query string, putting the parameters into the map
              * specified.
              * @param q the query string.
              * @param p destination parameters map.
              */
             static void parse_query(string& q,params_t& p);
     };
 
 }
 
 #endif /* __KINGATE_CGI_GATEWAY_H */
 /*
  * vim:set ft=cpp:
  */
diff --git a/include/kingate/cookies.h b/include/kingate/cookies.h
new file mode 100644
index 0000000..83ef0c6
--- a/dev/null
+++ b/include/kingate/cookies.h
@@ -0,0 +1,300 @@
+#ifndef __KINGATE_COOKIES_H
+#define __KINGATE_COOKIES_H
+
+#include <string>
+#include <map>
+#include <ostream>
+
+/**
+ * @file
+ * @brief cookies-related classes.
+ */
+
+namespace kingate {
+    using namespace std;
+
+    /**
+     * Class, holding the cookie with parameters.
+     */
+    class cookie : public map<string,string> {
+        public:
+            /**
+             * Cookie name.
+             */
+            string name;
+            /**
+             * Cookie value.
+             */
+            string value;
+
+            cookie() { }
+            /**
+             * @param n cookie name.
+             * @param v cookie value.
+             */
+            cookie(const string& n,const string& v)
+                : name(n), value(v) { }
+
+            /**
+             * set cookie parameter.
+             * @param p parameter name.
+             * @param v parameter value.
+             * @see _get_string()
+             */
+            void _set_string(const string& p,const string& v);
+           
+            /**
+             * @param n cookie name.
+             * @see get_name()
+             */
+            void set_name(const string& n) { name = n; }
+            /**
+             * @param v cookie value.
+             * @see set_value()
+             */
+            void set_value(const string& v) { value = v; }
+            /**
+             * @param c coomment.
+             * @see get_comment()
+             * @see has_comment()
+             * @see unset_comment()
+             */
+            void set_comment(const string& c);
+            /**
+             * @param d domain.
+             * @see get_domain()
+             * @see has_domain()
+             * @see unset_domain()
+             */
+            void set_domain(const string& d);
+            /**
+             * @param ma max-age.
+             * @see get_max_age()
+             * @see has_max_age()
+             * @see unset_max_age()
+             */
+            void set_max_age(const string& ma);
+            /**
+             * @param p path.
+             * @see get_path()
+             * @see has_path()
+             * @see unset_path()
+             */
+            void set_path(const string& p);
+            /**
+             * set cookie security.
+             * @param s true if secure.
+             * @see get_secure()
+             * @see is_secure()
+             */
+            void set_secure(bool s);
+
+            /**
+             * @param e expiration time.
+             * @see get_expires()
+             * @see has_expires()
+             * @see unset_expires()
+             */
+            void set_expires(const string& e);
+
+            /**
+             * get cookie parameter.
+             * @param p parameter name.
+             * @return parameter value.
+             * @see _set_string()
+             */
+            const string& _get_string(const string& p) const;
+
+            /**
+             * @return cookie name.
+             * @see set_name()
+             */
+            const string& get_name() const { return name; }
+            /**
+             * @return cookie value.
+             * @see set_value()
+             */
+            const string& get_value() const { return value; }
+            /**
+             * @return cookie comment.
+             * @see set_comment()
+             * @see has_comment()
+             * @see unset_comment()
+             */
+            const string& get_comment() const;
+            /**
+             * @return cookie domain.
+             * @see set_domain()
+             * @see has_domain()
+             * @see unset_domain()
+             */
+            const string& get_domain() const;
+            /**
+             * @return cookie max-age.
+             * @see set_max_age()
+             * @see has_max_age()
+             * @see unset_max_age()
+             */
+            const string& get_max_age() const;
+            /**
+             * @return cookie path.
+             * @see set_path()
+             * @see has_path()
+             * @see unset_path()
+             */
+            const string& get_path() const;
+            /**
+             * @return cookie security.
+             * @see is_secure()
+             * @see set_secure()
+             */
+            bool get_secure() const;
+            /**
+             * @return cookie security.
+             * @see get_secure()
+             * @see set_secure()
+             */
+            bool is_secure() const { return get_secure(); }
+
+            /**
+             * @return cookie expiration time.
+             * @see set_expires()
+             * @see has_expires()
+             * @see unset_expires()
+             */
+            const string& get_expires() const;
+
+            /**
+             * @return true if cookie has comment.
+             * @see set_comment()
+             * @see get_comment()
+             * @see unset_comment()
+             */
+            bool has_comment() const;
+            /**
+             * @return true if cookie has domain.
+             * @see set_domain()
+             * @see get_domain()
+             * @see unset_domain()
+             */
+            bool has_domain() const;
+            /**
+             * @return true if cookie has max-age.
+             * @see set_max_age()
+             * @see get_max_age()
+             * @see unset_max_age()
+             */
+            bool has_max_age() const;
+            /**
+             * @return true if cookie has path.
+             * @see set_path()
+             * @see get_path()
+             * @see unset_path()
+             */
+            bool has_path() const;
+
+            /**
+             * @return true if cookie has expiration time.
+             * @see set_expires()
+             * @see get_expires()
+             * @see unset_expires()
+             */
+            bool has_expires() const;
+
+            /**
+             * rid cookie of comment.
+             * @see set_comment()
+             * @see get_comment()
+             * @see has_comment()
+             */
+            void unset_comment();
+            /**
+             * rid cookie of domain.
+             * @see set_domain()
+             * @see get_domain()
+             * @see has_domain()
+             */
+            void unset_domain();
+            /**
+             * rid cookie of max-age.
+             * @see set_max_age()
+             * @see get_max_age()
+             * @see has_max_age()
+             */
+            void unset_max_age();
+            /**
+             * rid cookie of path.
+             * @see set_path()
+             * @see get_path()
+             * @see has_path()
+             */
+            void unset_path();
+
+            /**
+             * rid cookie of expiration time.
+             * @see set_expires()
+             * @see get_expires()
+             * @see has_expires()
+             */
+            void unset_expires();
+
+            /**
+             * render the 'Set-Cookie' HTTP header according to RFC2109.
+             * Absolutely useless, only works with lynx.
+             * @return the rendered header content.
+             */
+            string set_cookie_header_rfc2109() const;
+            /**
+             * render the 'Set-Cookie' header according to the early vague
+             * netscape specs and common practice.
+             * @return the rendered header content.
+             */
+            string set_cookie_header() const;
+    };
+
+    /**
+     * Cookies container class.
+     */
+    class cookies_t : public map<string,cookie> {
+        public:
+
+            cookies_t() { }
+            /**
+             * @param s 'Cookie:' HTTP header contents to parse.
+             */
+            cookies_t(const string& s) { parse_cookies(s); }
+
+            /**
+             * @param c cookie to set.
+             */
+            void set_cookie(const cookie& c) { (*this)[c.get_name()]=c; }
+            /**
+             * @param n cookie name to remove.
+             */
+            void unset_cookie(const key_type& n) { erase(n); }
+            /**
+             * @param n cookie name.
+             * @return true if exists.
+             */
+            bool has_cookie(const key_type& n) const;
+            /**
+             * Return the named cookie if one exists.
+             * @param n cookie name.
+             * @return const reference to cookie object.
+             */
+            const cookie& get_cookie(const key_type& n) const;
+            /**
+             * Return the named cookie if one exists.
+             * @param n cookie name.
+             * @return reference to cookie object.
+             */
+            cookie& get_cookie(const key_type& n);
+
+            /**
+             * @param s HTTP 'Cookie' header content.
+             */
+            void parse_cookies(const string& s);
+    };
+}
+
+#endif /* __KINGATE_COOKIES_H */
diff --git a/include/kingate/headers.h b/include/kingate/headers.h
new file mode 100644
index 0000000..fb37fec
--- a/dev/null
+++ b/include/kingate/headers.h
@@ -0,0 +1,94 @@
+#ifndef __KINGATE_HEADERS_H
+#define __KINGATE_HEADERS_H
+
+#include <string>
+#include <map>
+#include <ostream>
+
+/**
+ * @file
+ * @brief the headers -- HTTP headers container class.
+ */
+
+namespace kingate {
+    using namespace std;
+
+    /**
+     * The container class for HTTP headers.
+     */
+    class headers : public multimap<string,string> {
+        public:
+
+            /**
+             * Reference header if one exists.
+             * @param k the header.
+             * @return reference to the content.
+             */
+            const mapped_type& operator[](const key_type& k) const {
+                return get_header(k);
+            }
+            /**
+             * Reference header, creating one if needed.
+             * @param k the header.
+             * @return reference to the content.
+             */
+            mapped_type& operator[](const key_type& k) {
+                return get_header(k);
+            }
+
+            /**
+             * Set HTTP header. Remove all existent occurences of headers with
+             * this name.
+             * @param h header name.
+             * @param c header content.
+             */
+            void set_header(const key_type& h,const mapped_type& c);
+            /**
+             * Add HTTP header.
+             * @param h header name.
+             * @param c header content.
+             */
+            void add_header(const key_type& h,const mapped_type& c);
+            /**
+             * Remove named header.
+             * @param h header name.
+             */
+            void unset_header(const key_type& h);
+            /**
+             * Return const reference to the existing header.
+             * @param h header name.
+             * @return reference to header content.
+             */
+            const mapped_type& get_header(const key_type& h) const;
+            /**
+             * Return reference to the header, creating one if needed.
+             * @param h header name.
+             * @return reference to the content.
+             */
+            mapped_type& get_header(const key_type& h);
+            /**
+             * Return the range of headers with a certain name.
+             * @param h header name.
+             * @return pair of const iterators with the beginning and the end
+             * of range.
+             */
+            pair<const_iterator,const_iterator> get_headers(const key_type& h) const;
+            /**
+             * Return the range of headers with a certain name.
+             * @param h header name.
+             * @return pair of iterators with the beginning and the end
+             * of range.
+             */
+            pair<iterator,iterator> get_headers(const key_type& h);
+            /**
+             * Inquire whether the named header exists.
+             * @param h header name.
+             * @return true if exists.
+             */
+            bool has_header(const key_type& h) const;
+
+    };
+
+}
+
+#endif /* __KINGATE_HEADERS_H */
diff --git a/include/kingate/util.h b/include/kingate/util.h
index 6024ccf..3fd96f6 100644
--- a/include/kingate/util.h
+++ b/include/kingate/util.h
@@ -1,49 +1,62 @@
 #ifndef __KINGATE_UTIL_H
 #define __KINGATE_UTIL_H
 
 #include <string>
 
 #ifndef __deprecated
 #if ( __GNUC__ == 3 && __GNUC_MINOR__ > 0 ) || __GNUC__ > 3
 #define __deprecated    __attribute__((deprecated))
 #else
 #define __deprecated
 #endif
 #endif
 
 namespace kingate {
     using namespace std;
 
     /**
      * Encode string for passing via URL.
      * @param str string unencoded.
      * @return the encoded string.
      */
     string url_encode(const string& str);
     /**
      * Remove URL-encoding from the string.
      * @param str the URL-encoded string.
      * @return the decoded string.
      */
     string url_decode(const string& str);
 
     /**
+     * Quote string for use in HTTP header.
+     * @param str the string to quote.
+     * @return the quoted string.
+     */
+    string http_quoted_string(const string& str);
+    /**
+     * Quote string for use in HTTP header if necessary.
+     * @param str the string to quote.
+     * @return the quoted string or token left as is.
+     */
+    string http_quote(const string& str);
+
+    /**
      * deprecated alias to url_encode.
      * @see url_encode
      */
     inline string __deprecated url_escape(const string& str) {
         return url_encode(str);
     }
     /**
      * deprecated alias to url_decode.
      * @see url_decode
      */
     inline string __deprecated url_unescape(const string& str) {
         return url_decode(str);
     }
 }
 
 #endif /* __KINGATE_UTIL_H */
 /*
  * vim:set ft=cpp:
  */
diff --git a/src/Makefile.am b/src/Makefile.am
index 12bb1f8..2d462c8 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -1,25 +1,27 @@
 lib_LTLIBRARIES = libkingate.la libkingate-plaincgi.la
 
 if HAVE_FCGI
 lib_LTLIBRARIES += libkingate-fcgi.la
 endif
 
 INCLUDES = -I${top_srcdir}/include -I${top_srcdir}
 AM_CXXFLAGS = ${KONFORKA_CFLAGS}
 LDADD = ${KONFORKA_LIBS}
 
 libkingate_la_SOURCES = \
     cgi_gateway.cc \
     cgi_interface.cc \
-    util.cc
+    util.cc \
+    cookies.cc \
+    headers.cc
 libkingate_la_LDFLAGS = -version-info 2:0:0
 
 libkingate_fcgi_la_SOURCES = \
     fastcgi.cc
 libkingate_fcgi_la_LDFLAGS = -version-info 1:0:0
 
 libkingate_plaincgi_la_SOURCES = \
         plaincgi.cc
 libkingate_plaincgi_la_LDFLAGS = -version-info 1:0:0
 
 EXTRA_DIST = ${libkingate_fcgi_la_SOURCES}
diff --git a/src/cgi_gateway.cc b/src/cgi_gateway.cc
index 30410f2..ab48f78 100644
--- a/src/cgi_gateway.cc
+++ b/src/cgi_gateway.cc
@@ -1,241 +1,245 @@
 #include <errno.h>
 #include <ctype.h>
 #include "kingate/cgi_gateway.h"
 #include "kingate/util.h"
 #include "kingate/exception.h"
 
 namespace kingate {
 
     static string empty_string;
 
     cgi_gateway::cgi_gateway(cgi_interface& ci)
         : iface(ci), b_parsed_content(false) {
             // Fetch GET content
             try {
                 string qs = get_meta("QUERY_STRING");
                 parse_query(qs,get);
             }catch(exception_notfound& enf) { }
             // Fetch POST content
             if(!strcasecmp(content_type().c_str(),"application/x-www-form-urlencoded")) {
                 unsigned long cl = content_length();
                 if(cl) {
                     char * tmp = new char[cl];
                     iface.in().read(tmp,cl);
                     string qs(tmp,cl);
                     delete tmp;
                     parse_query(qs,post);
                 }
                 b_parsed_content = true;
             }
+            // Parse cookies
+            try {
+                cookies.parse_cookies(get_meta("HTTP_COOKIE"));
+            }catch(exception_notfound& enf) { }
         }
 
     bool cgi_gateway::has_GET(const string& n) const {
         return get.find(n) != get.end();
     }
     const string& cgi_gateway::get_GET(const string& n) const {
         params_t::const_iterator i = get.find(n);
         if(i==get.end())
             throw exception_notfound(CODEPOINT,"no such parameter");
         return i->second;
     }
     bool cgi_gateway::has_POST(const string& n) const {
         return post.find(n) != post.end();
     }
     const string& cgi_gateway::get_POST(const string& n) const {
         params_t::const_iterator i = post.find(n);
         if(i==post.end())
             throw exception_notfound(CODEPOINT,"no such parameter");
         return i->second;
     }
     bool cgi_gateway::has_param(const string& n) const {
         return has_GET(n) || has_POST(n);
     }
     const string& cgi_gateway::get_param(const string& n) const {
         params_t::const_iterator i = get.find(n);
         if(i!=get.end())
             return i->second;
         i = post.find(n);
         if(i!=post.end())
             return i->second;
         throw exception_notfound(CODEPOINT,"no such parameter");
     }
 
     /*
      * deprecated stuff.
      */
     const string& cgi_gateway::get_content_type() const {
         if(!has_meta("CONTENT_TYPE"))
             return empty_string;
         return get_meta("CONTENT_TYPE");
     }
     unsigned long cgi_gateway::get_content_length() const {
         if(!has_meta("CONTENT_LENGTH"))
             return 0;
         string cl = get_meta("CONTENT_LENGTH");
         return strtol(cl.c_str(),NULL,10);
     }
     /*
      *
      */
 
     const string& cgi_gateway::http_request_header(const string& hn) const {
         string mvn = "HTTP_";
         for(const char* p=hn.c_str();*p;p++) {
             if(*p=='-')
                 mvn += '_';
             else
                 mvn += toupper(*p);
         }
         return get_meta(mvn);
     }
 
     const string& cgi_gateway::auth_type() const {
         try {
             return get_meta("AUTH_TYPE");
         }catch(exception_notfound& enf) {
             return empty_string;
         }
     }
     unsigned long cgi_gateway::content_length() const {
         try {
             const string& cl = get_meta("CONTENT_LENGTH");
             errno = 0;
             const char *clp = cl.c_str();
             unsigned long rv = strtol(clp,(char**)&clp,10);
             if(errno || *clp)
                 throw server_error(CODEPOINT,"Invalid CONTENT_LENGTH value passed from server");
             return rv;
         }catch(exception_notfound& enf) {
             return 0;
         }
     }
     const string& cgi_gateway::content_type() const {
         try {
             return get_meta("CONTENT_TYPE");
         }catch(exception_notfound& enf) {
             return empty_string;
         }
     }
     const string& cgi_gateway::gateway_interface() const {
         try {
             return get_meta("GATEWAY_INTERFACE");
         }catch(exception_notfound& enf) {
             return empty_string;
         }
     }
     const string& cgi_gateway::path_info() const {
         try {
             return get_meta("PATH_INFO");
         }catch(exception_notfound& enf) {
             return empty_string;
         }
     }
     const string& cgi_gateway::path_translated() const {
         try {
             return get_meta("PATH_TRANSLATED");
         }catch(exception_notfound& enf) {
             return empty_string;
         }
     }
     const string& cgi_gateway::query_string() const {
         try {
             return get_meta("QUERY_STRING");
         }catch(exception_notfound& enf) {
             return empty_string;
         }
     }
     const string& cgi_gateway::remote_addr() const {
         try {
             return get_meta("REMOTE_ADDR");
         }catch(exception_notfound& enf) {
             return empty_string;
         }
     }
     const string& cgi_gateway::remote_host() const {
         try {
             return get_meta("REMOTE_HOST");
         }catch(exception_notfound& enf) {
             return remote_addr();
         }
     }
     const string& cgi_gateway::remote_ident() const {
         try {
             return get_meta("REMOTE_IDENT");
         }catch(exception_notfound& enf) {
             return empty_string;
         }
     }
     const string& cgi_gateway::remote_user() const {
         try {
             return get_meta("REMOTE_USER");
         }catch(exception_notfound& enf) {
             return empty_string;
         }
     }
     const string& cgi_gateway::request_method() const {
         try {
             return get_meta("REQUEST_METHOD");
         }catch(exception_notfound& enf) {
             throw server_error(CODEPOINT,"No REQUEST_METHOD passed from server");
         }
     }
     const string& cgi_gateway::script_name() const {
         try {
             return get_meta("SCRIPT_NAME");
         }catch(exception_notfound& enf) {
             throw server_error(CODEPOINT,"No SCRIPT_NAME passed from server");
         }
     }
     const string& cgi_gateway::server_name() const {
         try {
             return get_meta("SERVER_NAME");
         }catch(exception_notfound& enf) {
             throw server_error(CODEPOINT,"No SERVER_NAME passed from server");
         }
     }
     unsigned int cgi_gateway::server_port() const {
         try {
             const string& sp = get_meta("SERVER_PORT");
             errno = 0;
             const char *spp = sp.c_str();
             unsigned int rv = strtol(spp,(char**)&spp,10);
             if(errno || *spp)
                 throw server_error(CODEPOINT,"Invalid SERVER_PORT value passed from server");
             return rv;
         }catch(exception_notfound& enf) {
             throw server_error(CODEPOINT,"No SERVER_PORT passed from server");
         }
     }
     const string& cgi_gateway::server_protocol() const {
         try {
             return get_meta("SERVER_PROTOCOL");
         }catch(exception_notfound& enf) {
             throw server_error(CODEPOINT,"No SERVER_PROTOCOL passed from server");
         }
     }
     const string& cgi_gateway::server_software() const {
         try {
             return get_meta("SERVER_SOFTWARE");
         }catch(exception_notfound& enf) {
             throw server_error(CODEPOINT,"No SERVER_SOFTWARE passed from server");
         }
     }
 
     void cgi_gateway::parse_query(string& q,params_t& p) {
         while(!q.empty()) {
             string::size_type amp = q.find('&');
             string pp = (amp==string::npos)?q:q.substr(0,amp);
             if(amp==string::npos)
                 q.clear();
             else
                 q.erase(0,amp+1);
             string::size_type eq = pp.find('=');
             if(eq == string::npos) {
                 p.insert(params_t::value_type("",url_decode(pp)));
             }else{
                 p.insert(params_t::value_type(url_decode(pp.substr(0,eq)),url_decode(pp.substr(eq+1))));
             }
         }
     }
 
 }
diff --git a/src/cookies.cc b/src/cookies.cc
new file mode 100644
index 0000000..40a0c8b
--- a/dev/null
+++ b/src/cookies.cc
@@ -0,0 +1,242 @@
+#include "kingate/cookies.h"
+#include "kingate/util.h"
+#include "kingate/exception.h"
+
+namespace kingate {
+
+    /*
+     * RFC 2109:
+     *    av-pairs        =       av-pair *(";" av-pair)
+     *    av-pair         =       attr ["=" value]        ; optional value
+     *    attr            =       token
+     *    value           =       word
+     *    word            =       token | quoted-string
+     */
+
+    /* RFC 2109:
+     *
+     * The origin server effectively ends a session by sending the client a
+     * Set-Cookie header with Max-Age=0.
+     *
+     * An origin server may include multiple Set-Cookie headers in a response.
+     * Note that an intervening gateway could fold multiple such headers into a
+     * single header.
+     *
+     *
+     *    set-cookie      =       "Set-Cookie:" cookies
+     *    cookies         =       1#cookie
+     *    cookie          =       NAME "=" VALUE *(";" cookie-av)
+     *    NAME            =       attr
+     *    VALUE           =       value
+     *    cookie-av       =       "Comment" "=" value
+     *                    |       "Domain" "=" value
+     *                    |       "Max-Age" "=" value
+     *                    |       "Path" "=" value
+     *                    |       "Secure"
+     *                    |       "Version" "=" 1*DIGIT
+     *
+     *
+     *    The origin server should send the following additional HTTP/1.1
+     *    response headers, depending on circumstances:
+     *
+     *    * To suppress caching of the Set-Cookie header: Cache-control: no-
+     *      cache="set-cookie".
+     *
+     *    and one of the following:
+     *
+     *    * To suppress caching of a private document in shared caches: Cache-
+     *      control: private.
+     *
+     *    * To allow caching of a document and require that it be validated
+     *      before returning it to the client: Cache-control: must-revalidate.
+     *
+     *    * To allow caching of a document, but to require that proxy caches
+     *      (not user agent caches) validate it before returning it to the
+     *      client: Cache-control: proxy-revalidate.
+     *
+     *    * To allow caching of a document and request that it be validated
+     *      before returning it to the client (by "pre-expiring" it):
+     *      Cache-control: max-age=0.  Not all caches will revalidate the
+     *      document in every case.
+     *
+     *    HTTP/1.1 servers must send Expires: old-date (where old-date is a
+     *    date long in the past) on responses containing Set-Cookie response
+     *    headers unless they know for certain (by out of band means) that
+     *    there are no downsteam HTTP/1.0 proxies.  HTTP/1.1 servers may send
+     *    other Cache-Control directives that permit caching by HTTP/1.1
+     *    proxies in addition to the Expires: old-date directive; the Cache-
+     *    Control directive will override the Expires: old-date for HTTP/1.1
+     *    proxies.
+     *
+     */
+
+    void cookie::_set_string(const string& p,const string& v) {
+        (*this)[p]=v;
+    }
+
+    void cookie::set_comment(const string& c) {
+        _set_string("comment",c);
+    }
+    void cookie::set_domain(const string& d) {
+        _set_string("domain",d);
+    }
+    void cookie::set_max_age(const string& ma) {
+        _set_string("max-age",ma);
+    }
+    void cookie::set_path(const string& p) {
+        _set_string("path",p);
+    }
+    void cookie::set_secure(bool s) {
+        if(s)
+            _set_string("secure","");
+        else
+            erase("secure");
+    }
+
+    void cookie::set_expires(const string& e) {
+        (*this)["expires"] = e;
+    }
+
+    const string& cookie::_get_string(const string& s) const {
+        const_iterator i = find(s);
+        if(i==end())
+            throw exception_notfound(CODEPOINT,"No parameter set");
+        return i->second;
+    }
+
+    const string& cookie::get_comment() const {
+        return _get_string("comment");
+    }
+    const string& cookie::get_domain() const {
+        return _get_string("domain");
+    }
+    const string& cookie::get_max_age() const {
+        return _get_string("max-age");
+    }
+    const string& cookie::get_path() const {
+        return _get_string("path");
+    }
+    bool cookie::get_secure() const {
+        return find("secure")!=end();
+    }
+
+    const string& cookie::get_expires() const {
+        return _get_string("expires");
+    }
+
+    bool cookie::has_comment() const {
+        return find("comment")!=end();
+    }
+    bool cookie::has_domain() const {
+        return find("domain")!=end();
+    }
+    bool cookie::has_max_age() const {
+        return find("max-age")!=end();
+    }
+    bool cookie::has_path() const {
+        return find("path")!=end();
+    }
+
+    bool cookie::has_expires() const {
+        return find("expires")!=end();
+    }
+
+    void cookie::unset_comment() {
+        erase("comment");
+    }
+    void cookie::unset_domain() {
+        erase("domain");
+    }
+    void cookie::unset_max_age() {
+        erase("max-age");
+    }
+    void cookie::unset_path() {
+        erase("path");
+    }
+
+    void cookie::unset_expires() {
+        erase("expires");
+    }
+
+    string cookie::set_cookie_header_rfc2109() const {
+        string rv = name + "=" + http_quoted_string(value);
+        for(const_iterator i=begin();i!=end();++i) {
+            if(i->first=="secure") {
+                rv += "; secure";
+            }else{
+                rv += "; "+i->first+"="+http_quote(i->second);
+            }
+        }
+        rv += "; Version=1";
+        return rv;
+    }
+
+    string cookie::set_cookie_header() const {
+        string rv = name + "=" + value;
+        for(const_iterator i=begin();i!=end();++i) {
+            if(i->first=="secure") {
+                rv += "; secure";
+            }else{
+                rv += "; "+i->first+"="+i->second;
+            }
+        }
+        return rv;
+    }
+
+    bool cookies_t::has_cookie(const key_type& n) const {
+        return find(n)!=end();
+    }
+
+    const cookie& cookies_t::get_cookie(const key_type& n) const {
+        const_iterator i=find(n);
+        if(i==end())
+            throw exception_notfound(CODEPOINT,"No cookie with such name found");
+        return i->second;
+    }
+
+    cookie& cookies_t::get_cookie(const key_type& n) {
+        iterator i=find(n);
+        if(i==end())
+            throw exception_notfound(CODEPOINT,"No cookie with such name found");
+        return i->second;
+    }
+
+    void cookies_t::parse_cookies(const string& s) {
+        string str = s;
+        while(!str.empty()) {
+            string::size_type sc = str.find(';');
+            string s;
+            if(sc==string::npos) {
+                s = str;
+                str.erase();
+            }else{
+                s = str.substr(0,sc);
+                str.erase(0,sc+1);
+            }
+            string::size_type nsp=s.find_first_not_of(" \t");
+            if((nsp!=string::npos) && nsp)
+                s.erase(0,nsp);
+            string::size_type eq=s.find('=');
+            if(eq==string::npos)
+                continue;
+            string n = s.substr(0,eq);
+            s.erase(0,eq+1);
+            nsp = n.find_last_not_of(" \t");
+            n.erase(nsp+1);
+            nsp = s.find_first_not_of(" \t");
+            string v;
+            if(nsp!=string::npos)
+                v = s.substr(nsp);
+            else
+                v = s;
+            nsp = v.find_last_not_of(" \t");
+            if(nsp==string::npos)
+                v.erase();
+            else
+                v.erase(nsp+1);
+            cookie& c = (*this)[n];
+            c.set_name(n); c.set_value(v);
+        }
+    }
+
+}
diff --git a/src/headers.cc b/src/headers.cc
new file mode 100644
index 0000000..89ac519
--- a/dev/null
+++ b/src/headers.cc
@@ -0,0 +1,40 @@
+#include "kingate/headers.h"
+#include "kingate/exception.h"
+
+namespace kingate {
+
+    void headers::set_header(const key_type& h,const mapped_type& c) {
+        erase(h);
+        insert(value_type(h,c));
+    }
+    void headers::add_header(const key_type& h,const mapped_type& c) {
+        insert(value_type(h,c));
+    }
+    void headers::unset_header(const key_type& h) {
+        erase(h);
+    }
+    const headers::mapped_type& headers::get_header(const key_type& h) const {
+        const_iterator i=find(h);
+        if(i==end())
+            throw exception_notfound(CODEPOINT,"No such header");
+        return i->second;
+    }
+    headers::mapped_type& headers::get_header(const key_type& h) {
+        // XXX: or should it fail if there's no such thing, unlike operator[]?
+        iterator i=find(h);
+        if(i==end())
+            i = insert(value_type(h,""));
+        return i->second;
+    }
+
+    pair<headers::const_iterator,headers::const_iterator> headers::get_headers(const key_type& h) const {
+        return equal_range(h);
+    }
+    pair<headers::iterator,headers::iterator> headers::get_headers(const key_type& h) {
+        return equal_range(h);
+    }
+
+    bool headers::has_header(const key_type& h) const {
+        return find(h)!=end();
+    }
+}
diff --git a/src/util.cc b/src/util.cc
index 3166e62..48e486a 100644
--- a/src/util.cc
+++ b/src/util.cc
@@ -1,53 +1,106 @@
 #include "kingate/util.h"
 #include "kingate/exception.h"
 
 namespace kingate {
 
     static const char *safeChars = 
         "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
         "abcdefghijklmnopqrstuvwxyz"
         "0123456789"
         "_-" ;
 
     string url_encode(const string& str) {
         string rv = str;
         string::size_type screwed = 0;
         for(;;) {
             screwed = rv.find_first_not_of(safeChars,screwed);
             if(screwed == string::npos)
                 break;
             while(screwed<rv.length() && !strchr(safeChars,rv.at(screwed))) {
                 char danger = rv.at(screwed);
                 if(danger==' ') {
                     rv.replace(screwed++,1,1,'+');
                 }else{
                     static char tmp[4] = {'%',0,0,0};
                     snprintf(&tmp[1],3,"%02X",0xFF&(int)danger);
                     rv.replace(screwed,1,tmp,3);
                     screwed+=3;
                 }
             }
         }
         return rv;
     }
     string url_decode(const string& str) {
         string rv = str;
         string::size_type unscrewed = 0;
         for(;;) {
             unscrewed = rv.find_first_of("%+",unscrewed);
             if(unscrewed == string::npos)
                 break;
             if(rv.at(unscrewed)=='+') {
                 rv.replace(unscrewed++,1,1,' ');
             }else{
                 if((rv.length()-unscrewed)<3)
                     throw exception(CODEPOINT,"incorrectly escaped string");
                 // XXX: ensure it's hex?
                 int danger = strtol(rv.substr(unscrewed+1,2).c_str(),NULL,16);
                 rv.replace(unscrewed,3,1,danger);
                 unscrewed++;
             }
         }
         return rv;
     }
+
+    /*
+     * RFC 2616:
+     *
+     *        separators     = "(" | ")" | "<" | ">" | "@"
+     *                       | "," | ";" | ":" | "\" | <">
+     *                       | "/" | "[" | "]" | "?" | "="
+     *                       | "{" | "}" | SP | HT
+     */
+    
+    /*
+     * RFC 2616:
+     *
+     *        token          = 1*<any CHAR except CTLs or separators>
+     */
+
+    static const char *quotible_chars =
+        "\001\002\003\004\005\006\007\010"
+        "\011\012\013\014\015\016\017\020"
+        "\021\022\023\024\025\026\027\030"
+        "\031\032\033\034\035\036\037\040"
+        "()<>@,;:\\\"/[]?={}" /* separator chars (except for SP and HT mentioned elsewhere */
+        "\177"
+        ;
+
+    /*
+     * RFC 2616:
+     *
+     *        quoted-string  = ( <"> *(qdtext | quoted-pair ) <"> )
+     *        qdtext         = <any TEXT except <">>
+     *
+     *    The backslash character ("\") MAY be used as a single-character
+     *    quoting mechanism only within quoted-string and comment constructs.
+     *
+     *        quoted-pair    = "\" CHAR
+     */
+
+    string http_quoted_string(const string& str) {
+        string rv = str;
+        string::size_type sp=0;
+        for(string::size_type q=rv.find('"');(q=rv.find('"',q))!=string::npos;q+=2)
+            rv.insert(q,1,'\\');
+        rv.insert(0,1,'"');
+        rv += '"';
+        return rv;
+    }
+
+    string http_quote(const string& str) {
+        if(str.find_first_of(quotible_chars)==string::npos)
+            return str;
+        return http_quoted_string(str);
+    }
+
 }