1. renamed url_escape/unescape to encode/decode

2. introduced a number of wrappers for accessing meta-variables mentioned in RFC3875
3. bumped library version info

6 files changed, 316 insertions, 26 deletions

diff --git a/include/kingate/cgi_gateway.h b/include/kingate/cgi_gateway.h
index f683580..a5c4056 100644
--- a/include/kingate/cgi_gateway.h
+++ b/include/kingate/cgi_gateway.h
@@ -1,18 +1,26 @@
 #ifndef __KINGATE_CGI_GATEWAY_H
 #define __KINGATE_CGI_GATEWAY_H
 
 #include <map>
 #include "kingate/cgi_interface.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 {
@@ -50,25 +58,25 @@ namespace kingate {
              * @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()
              */
-            string get_meta(const string& n) const { return iface.get_meta(n); }
+            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()
              */
@@ -89,72 +97,169 @@ namespace kingate {
             /**
              * 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
              */
-            string get_GET(const string& n) const;
+            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
              */
-            string get_POST(const string& n) const;
+            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.
              */
-            string get_param(const string& n) const;
+            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& get_content_type() const;
+            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 get_content_length() const;
+            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);
     };
 
 }
 
diff --git a/include/kingate/exception.h b/include/kingate/exception.h
index 6ebb361..85d89ea 100644
--- a/include/kingate/exception.h
+++ b/include/kingate/exception.h
@@ -27,18 +27,27 @@ namespace kingate {
     };
 
     /**
      * Thrown if the specified variable or parameter wasn't found.
      */
     class exception_notfound : public exception {
         public:
             explicit exception_notfound(const string& w)
                 : exception(w) { }
             exception_notfound(const string& fi,const string& fu,int l,const string& w)
                 : exception(fi,fu,l,w) { }
     };
+
+    /**
+     * Thrown in case of unexpected server behaviour.
+     */
+    class server_error : public exception {
+        public:
+            server_error(const string& fi,const string& fu,int l,const string& w)
+                : exception(fi,fu,l,w) { }
+    };
 }
 
 #endif /* __KINGATE_EXCEPTION_H */
 /*
  * vim:set ft=cpp:
  */
diff --git a/include/kingate/util.h b/include/kingate/util.h
index 4b0dca8..6024ccf 100644
--- a/include/kingate/util.h
+++ b/include/kingate/util.h
@@ -1,26 +1,49 @@
 #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;
 
     /**
-     * Escape string for passing via URL.
-     * @param str string unescaped.
-     * @return the escaped string.
+     * Encode string for passing via URL.
+     * @param str string unencoded.
+     * @return the encoded string.
      */
-    string url_escape(const string& str);
+    string url_encode(const string& str);
     /**
      * Remove URL-encoding from the string.
      * @param str the URL-encoded string.
-     * @return the unescaped string.
+     * @return the decoded string.
+     */
+    string url_decode(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
      */
-    string url_unescape(const string& str);
+    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 d516d37..12bb1f8 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -3,23 +3,23 @@ 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
-libkingate_la_LDFLAGS = -version-info 1:0:0
+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 eae7a03..30410f2 100644
--- a/src/cgi_gateway.cc
+++ b/src/cgi_gateway.cc
@@ -1,88 +1,241 @@
+#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
-            if(iface.has_meta("QUERY_STRING")) {
-                string qs = iface.get_meta("QUERY_STRING");
+            try {
+                string qs = get_meta("QUERY_STRING");
                 parse_query(qs,get);
-            }
+            }catch(exception_notfound& enf) { }
             // Fetch POST content
-            if(!strcasecmp(get_content_type().c_str(),"application/x-www-form-urlencoded")) {
-                unsigned long cl = get_content_length();
+            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;
             }
         }
 
     bool cgi_gateway::has_GET(const string& n) const {
         return get.find(n) != get.end();
     }
-    string cgi_gateway::get_GET(const string& n) const {
+    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();
     }
-    string cgi_gateway::get_POST(const string& n) const {
+    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);
     }
-    string cgi_gateway::get_param(const string& n) const {
+    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 ""; // XXX:
+            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_unescape(pp)));
+                p.insert(params_t::value_type("",url_decode(pp)));
             }else{
-                p.insert(params_t::value_type(url_unescape(pp.substr(0,eq)),url_unescape(pp.substr(eq+1))));
+                p.insert(params_t::value_type(url_decode(pp.substr(0,eq)),url_decode(pp.substr(eq+1))));
             }
         }
     }
 
 }
diff --git a/src/util.cc b/src/util.cc
index 2e2d305..3166e62 100644
--- a/src/util.cc
+++ b/src/util.cc
@@ -1,45 +1,45 @@
 #include "kingate/util.h"
 #include "kingate/exception.h"
 
 namespace kingate {
 
     static const char *safeChars = 
         "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
         "abcdefghijklmnopqrstuvwxyz"
         "0123456789"
         "_-" ;
 
-    string url_escape(const string& str) {
+    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_unescape(const string& str) {
+    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?