changed auto_ptr to shared_ptr

Signed-off-by: Michael Krelin <hacker@klever.net>

6 files changed, 59 insertions, 10 deletions

diff --git a/acinclude.m4 b/acinclude.m4
index 80defc7..fbb4cdc 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -118,49 +118,66 @@ AC_DEFUN([AC_WITH_PCREPP],[
  AC_ARG_WITH([pcrepp],
   AC_HELP_STRING([--with-pcrepp=location],[Look for pcre++ in specified locations]),
   [
    if test "${withval}" = "no" ; then
     WANT_PCREPP="no"
    else
     if test -x "${withval}" ; then
      PCREPP_CONFIG="${withval}"
     elif test -x "${withval}/pcre++-config" ; then
      PCREPP_CONFIG="${withval}/pcre++-config"
     elif test -x "${withval}/bin/pcre++-config" ; then
      PCREPP_CONFIG="${withval}/bin/pcre++-config"
     fi
    fi
   ]
  )
  if test "${WANT_PCREPP}" = "no" ; then
   ifelse([$2], , :, [$2])
  else
   if test "${HAVE_PCRE}" != "yes" ; then
    ifelse([$2], , :, [$2])
   else
    if test -z "${PCREPP_CONFIG}" ; then
     AC_PATH_PROG([PCREPP_CONFIG],[pcre++-config],false,[${PCREPP_LOCATIONS}])
     if test "${PCREPP_CONFIG}" = "false" ; then
      ifelse([$2], , :, [$2])
     else
      HAVE_PCREPP="yes"
      PCREPP_PREFIX="`${PCREPP_CONFIG} --prefix`"
      PCREPP_EXEC_PREFIX="`${PCREPP_CONFIG} --exec-prefix`"
      PCREPP_VERSION="`${PCREPP_CONFIG} --version`"
      PCREPP_CFLAGS="`${PCREPP_CONFIG} --cflags` ${PCRE_CFLAGS}"
      PCREPP_LIBS="`${PCREPP_CONFIG} --libs` ${PCRE_LIBS}"
      AC_SUBST([PCREPP_CONFIG])
      AC_SUBST([PCREPP_PREFIX])
      AC_SUBST([PCREPP_EXEC_PREFIX])
      AC_SUBST([PCREPP_VERSION])
      AC_SUBST([PCREPP_CFLAGS])
      AC_SUBST([PCREPP_LIBS])
      AC_DEFINE([HAVE_PCREPP],,[pcre++ support])
      AC_DEFINE_UNQUOTED([PCREPP_VERSION],["${PCREPP_VERSION}"],[pcre++ version])
      $1
     fi
    fi
   fi
  fi
 ])
 
+dnl AC_CHECK_SHAREDPTR(NS,HEADER[,ACTION-IF-FOUND[,ACTION-IF-NOT-FOUND]])
+AC_DEFUN([AC_CHECK_SHAREDPTR],[
+ AC_LANG_PUSH([C++])
+ AC_MSG_CHECKING([for $1::shared_ptr<> in $2])
+ AC_COMPILE_IFELSE([
+  #include <$2>
+  int main(int c,char**v) { $1::shared_ptr<int> spi(new int(0)); return *spi; }
+ ],[
+  AC_MSG_RESULT([found])
+  $3
+ ],[
+  AC_MSG_RESULT([not found])
+  $4
+ ])
+ AC_LANG_POP([C++])
+])
+
 m4_include([acinclude.d/libcurl.m4])
diff --git a/configure.ac b/configure.ac
index 1bd1873..c4e9a74 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,76 +1,107 @@
 AC_INIT([libopkele], [0.4], [libopkele-bugs@klever.net])
 AC_CONFIG_SRCDIR([include/opkele/opkele-config.h])
 AC_CONFIG_HEADERS([config.h include/opkele/acconfig.h])
 AM_INIT_AUTOMAKE([dist-bzip2])
 
 AC_PROG_INSTALL
 AC_PROG_CXX
 AC_PROG_CC
 AC_PROG_LIBTOOL
 PKG_PROG_PKG_CONFIG
 
 AC_HEADER_STDC
 
 AC_PATH_PROG([XSLTPROC],[xsltproc],[true])
 
 AC_MSG_CHECKING([for source tree version])
 if headrev=$(cd $srcdir && git rev-parse --verify HEAD 2>/dev/null) ; then
  PACKAGE_SRC_VERSION="$(cd $srcdir && git describe --tags $headrev)"
  test "$PACKAGE_SRC_VERSION" = "$PACKAGE_VERSION" \
   -o "${PACKAGE_SRC_VERSION#${PACKAGE_VERSION}-}" != "$PACKAGE_SRC_VERSION" || PACKAGE_SRC_VERSION="${PACKAGE_VERSION}:${PACKAGE_SRC_VERSION}"
  ( cd $srcdir && git diff-index $headrev | read dirt ) && PACKAGE_SRC_VERSION="${PACKAGE_SRC_VERSION}-dirty"
 else
  PACKAGE_SRC_VERSION="$PACKAGE_VERSION"
 fi
 AC_MSG_RESULT([$PACKAGE_SRC_VERSION])
 AC_SUBST([PACKAGE_SRC_VERSION])
 AC_DEFINE_UNQUOTED([PACKAGE_SRC_VERSION],["$PACKAGE_SRC_VERSION"],[more or less precise source tree version])
 
+tr1_mem_std="false"
+tr1_mem_boost="false"
+AC_CHECK_SHAREDPTR(std::tr1,tr1/memory,[ tr1_mem_std=true ])
+AC_CHECK_SHAREDPTR(boost,boost/shared_ptr.hpp,[ tr1_mem_boost=true ])
+tr1_mem=""
+AC_ARG_WITH([tr1-memory],
+ AC_HELP_STRING([--with-tr1-memory=<boost|std>],[select tr1/memory (shared_ptr<>) implementation to use]),
+ [ tr1_mem="$withval" ]
+)
+AC_MSG_CHECKING([for tr1/memory implementation to use])
+test -z "$tr1_mem" && $tr1_mem_std && tr1_mem=std
+test -z "$tr1_mem" && $tr1_mem_boost && tr1_mem=boost
+test -z "$tr1_mem" && AC_MSG_RESULT([none found]) || AC_MSG_RESULT([$tr1_mem])
+case "$tr1_mem" in
+ std)
+  $tr1_mem_std || AC_MSG_ERROR([std implementation requested, but not found])
+  OPKELE_TR1_MEM_NS=std::tr1
+  OPKELE_TR1_MEM_HEADER=tr1/memory
+  ;;
+ boost)
+  $tr1_mem_boost || AC_MSG_ERROR([boost implementation requested, but not found])
+  OPKELE_TR1_MEM_NS=boost
+  OPKELE_TR1_MEM_HEADER=boost/shared_ptr.hpp
+  ;;
+ *)
+  AC_MSG_ERROR([no shared_ptr<> implementation found])
+  ;;
+esac
+AC_SUBST([OPKELE_TR1_MEM_NS])
+AC_SUBST([OPKELE_TR1_MEM_HEADER])
+
 PKG_CHECK_MODULES([OPENSSL],[openssl],,[
  AC_MSG_ERROR([no openssl library found. get one from http://www.openssl.org/])
 ])
 
 WANT_KONFORKA="yes"
 AC_ARG_ENABLE([konforka],
  AC_HELP_STRING([--disable-konforka],[do not use konforka library (default: use if found)]),
  [
   test "${enableval}" = "no" && WANT_KONFORKA="no"
  ]
 )
 if test "${WANT_KONFORKA}" = "yes" ; then
  PKG_CHECK_MODULES([KONFORKA],[konforka],[
   AC_SUBST([KONFORKA_CFLAGS])
   AC_SUBST([KONFORKA_LIBS])
   AC_DEFINE([HAVE_KONFORKA],,[defined in presence of konforka library])
   AC_DEFINE([OPKELE_HAVE_KONFORKA],,[defined in presence of konforka library])
   AC_SUBST([KONFORKA_KONFORKA],[konforka])
  ],[true])
 fi
 
 WANT_DOXYGEN="yes"
 AC_ARG_ENABLE([doxygen],
  AC_HELP_STRING([--disable-doxygen],[do not generate documentation]),
  [
   test "${enableval}" = "no" && WANT_DOXYGEN="no"
  ]
 )
 if test "${WANT_DOXYGEN}" = "yes" ; then
  AC_WITH_DOXYGEN
  AC_WITH_DOT
 else
  AM_CONDITIONAL([HAVE_DOXYGEN],[false])
  AM_CONDITIONAL([HAVE_DOT],[false])
 fi
 
 LIBCURL_CHECK_CONFIG(,,,[
  AC_MSG_ERROR([no required libcurl library. get one from http://curl.haxx.se/])
 ])
 
 AC_CHECK_HEADER([expat.h],[
  AC_CHECK_LIB([expat],[XML_ParserCreate],[
   EXPAT_LIBS=-lexpat
   EXPAT_CFLAGS=
   AC_SUBST([EXPAT_LIBS])
   AC_SUBST([EXPAT_CFLAGS])
  ],[
   AC_MSG_ERROR([no required expat library. get one from http://expat.sourceforge.net/])
@@ -99,52 +130,53 @@ ${curl_ssl_verify_host} || AC_DEFINE([DISABLE_CURL_SSL_VERIFYHOST],,[defined if
 curl_ssl_verify_peer="true"
 AC_ARG_ENABLE([ssl-verify-peer],
  AC_HELP_STRING([--disable-ssl-verify-peer],[disable cURL cert validity verification]),
  [ test "${enableval}" = "no" && curl_ssl_verify_peer="false" ]
 )
 ${curl_ssl_verify_peer} || AC_DEFINE([DISABLE_CURL_SSL_VERIFYPEER],,[defined if cURL is not to verify cert validity])
 
 postels_law=true
 AC_ARG_ENABLE([postels-law],
  AC_HELP_STRING([--disable-postels-law],[Be strict, do not adhere to Postel's Law ("be conservative in what you do, be liberal in what you accept from others", RFC 793)]),
  [ test "${enableval}" = "no" && postels_law=false ]
 )
 $postels_law && AC_DEFINE([POSTELS_LAW],,[defined if we want to adhere to Postel's Law])
 
 AC_DEFINE_UNQUOTED([OPKELE_SRC_DIR],["$PWD"],[source directory])
 
 nitpick=false
 AC_ARG_ENABLE([nitpicking],
  AC_HELP_STRING([--enable-nitpicking],[make compiler somewhat overly fastidious about the code it deals with]),
  [ test "$enableval" = "no" || nitpick=true ]
 )
 if $nitpick ; then
  CPP_NITPICK="-pedantic -Wall -Wextra -Wundef -Wshadow \
   -Wunsafe-loop-optimizations -Wconversion -Wmissing-format-attribute \
   -Wredundant-decls -ansi"
  # -Wlogical-op -Wmissing-noreturn 
  C_NITPICK="$CPP_NITPICK"
  CXX_NITPICK="$C_NITPICK"
 
  CPPFLAGS="$CPPFLAGS $CPP_NITPICK"
  CFLAGS="$CFLAGS $C_NITPICK"
  CXXFLAGS="$CXXFLAGS $CXX_NITPICK"
 fi
 
 xri_proxy_url="http://beta.xri.net/"
 AC_MSG_CHECKING([for XRI resolver proxy])
 AC_ARG_ENABLE([xri-proxy],
  AC_HELP_STRING([--with-xri-proxy=url],[set xri proxy for use when resolving xri identities, default is http://xr_proxy_url]),
  [ xri_proxy_url="$withval" ]
 )
 AC_MSG_RESULT([$xri_proxy_url])
 AC_DEFINE_UNQUOTED([XRI_PROXY_URL],["$xri_proxy_url"],[XRI proxy resolver URL])
 
 AC_CONFIG_FILES([
  Makefile
   libopkele.pc
   Doxyfile
  include/Makefile
+  include/opkele/tr1-mem.h
  lib/Makefile
  test/Makefile
 ])
 AC_OUTPUT
diff --git a/include/Makefile.am b/include/Makefile.am
index 078c6dc..26cb614 100644
--- a/include/Makefile.am
+++ b/include/Makefile.am
@@ -1,19 +1,20 @@
 nobase_include_HEADERS = \
 	opkele/acconfig.h \
 	opkele/opkele-config.h \
 	opkele/types.h \
 	opkele/association.h \
 	opkele/exception.h \
 	opkele/server.h \
 	opkele/consumer.h \
 	opkele/extension.h \
 	opkele/sreg.h \
 	opkele/extension_chain.h \
 	opkele/xconsumer.h \
 	opkele/xserver.h \
 	opkele/discovery.h \
-	opkele/uris.h
+	opkele/uris.h \
+	opkele/tr1-mem.h
 EXTRA_DIST = \
 	opkele/data.h \
 	opkele/curl.h opkele/expat.h \
 	opkele/util.h
diff --git a/include/opkele/consumer.h b/include/opkele/consumer.h
index c463787..3c1d318 100644
--- a/include/opkele/consumer.h
+++ b/include/opkele/consumer.h
@@ -1,144 +1,144 @@
 #ifndef __OPKELE_CONSUMER_H
 #define __OPKELE_CONSUMER_H
 
 #include <opkele/types.h>
 #include <opkele/extension.h>
 
 /**
  * @file
  * @brief OpenID consumer-side functionality
  */
 
 namespace opkele {
 
     /**
      * implementation of basic consumer functionality
      *
      * @note
      * The consumer uses libcurl internally, which means that if you're using
      * libopkele in multithreaded environment you should call curl_global_init
      * yourself before spawning any threads.
      */
     class consumer_t {
 	public:
 
 	    virtual ~consumer_t() { }
 
 	    /**
 	     * store association. The function should be overridden in the real
 	     * implementation to provide persistent associations store.
 	     * @param server the OpenID server
 	     * @param handle association handle
 	     * @param secret the secret associated with the server and handle
 	     * @param expires_in the number of seconds until the handle is expired
-	     * @return the auto_ptr<> for the newly allocated association_t object
+	     * @return the assoc_t for the newly allocated association_t object
 	     */
 	    virtual assoc_t store_assoc(const string& server,const string& handle,const secret_t& secret,int expires_in) = 0;
 	    /**
 	     * retrieve stored association. The function should be overridden
 	     * in the real implementation to provide persistent assocations
 	     * store.
 	     *
 	     * @note
 	     * The user is responsible for handling associations expiry and
 	     * this function should never return an expired or invalidated
 	     * association.
 	     *
 	     * @param server the OpenID server
 	     * @param handle association handle
 	     * @return the autho_ptr<> for the newly allocated association_t object
 	     * @throw failed_lookup if no unexpired association found
 	     */
 	    virtual assoc_t retrieve_assoc(const string& server,const string& handle) = 0;
 	    /**
 	     * invalidate stored association. The function should be overridden
 	     * in the real implementation of the consumer.
 	     * @param server the OpenID server
 	     * @param handle association handle
 	     */
 	    virtual void invalidate_assoc(const string& server,const string& handle) = 0;
 	    /**
 	     * retrieve any unexpired association for the server. If the
 	     * function is not overridden in the real implementation, the new
 	     * association will be established for each request.
 	     *
 	     * @note
 	     * The user is responsible for handling associations and this
 	     * function should never return an expired or invalidated
 	     * association.
 	     *
 	     * @note
 	     * It may be a good idea to pre-expire associations shortly before
 	     * their time is really up to avoid association expiry in the
 	     * middle of negotiations.
 	     *
 	     * @param server the OpenID server
-	     * @return the auto_ptr<> for the newly allocated association_t object
+	     * @return the assoc_t for the newly allocated association_t object
 	     * @throw failed_lookup in case of absence of the handle
 	     */
 	    virtual assoc_t find_assoc(const string& server);
 
 	    /**
 	     * retrieve the metainformation contained in link tags from the
 	     * page pointed by url. the function may implement caching of the
 	     * information.
 	     * @param url url to harvest for link tags
 	     * @param server reference to the string object where to put
 	     * openid.server value
 	     * @param delegate reference to the string object where to put the
 	     * openid.delegate value (if any)
 	     */
 	    virtual void retrieve_links(const string& url,string& server,string& delegate);
 
 	    /**
 	     * perform the associate request to OpenID server.
 	     * @param server the OpenID server
-	     * @return the auto_ptr<> for the newly allocated association_t
+	     * @return the assoc_t for the newly allocated association_t
 	     * object, representing established association
 	     * @throw exception in case of error
 	     */
 	    assoc_t associate(const string& server);
 	    /**
 	     * prepare the parameters for the checkid_immediate
 	     * request.
 	     * @param identity the identity to verify
 	     * @param return_to the return_to url to pass with the request
 	     * @param trust_root the trust root to advertise with the request
 	     * @param ext pointer to an extension(s) hooks object
 	     * @return the location string
 	     * @throw exception in case of error
 	     */
 	    virtual string checkid_immediate(const string& identity,const string& return_to,const string& trust_root="",extension_t *ext=0);
 	    /**
 	     * prepare the parameters for the checkid_setup
 	     * request.
 	     * @param identity the identity to verify
 	     * @param return_to the return_to url to pass with the request
 	     * @param trust_root the trust root to advertise with the request
 	     * @param ext pointer to an extension(s) hooks object
 	     * @return the location string
 	     * @throw exception in case of error
 	     */
 	    virtual string checkid_setup(const string& identity,const string& return_to,const string& trust_root="",extension_t *ext=0);
 	    /**
 	     * the actual implementation behind checkid_immediate() and
 	     * checkid_setup() functions.
 	     * @param mode checkid_* mode - either mode_checkid_immediate or mode_checkid_setup
 	     * @param identity the identity to verify
 	     * @param return_to the return_to url to pass with the request
 	     * @param trust_root the trust root to advertise with the request
 	     * @param ext pointer to an extension(s) hooks object
 	     * @return the location string
 	     * @throw exception in case of error
 	     */
 	    virtual string checkid_(mode_t mode,const string& identity,const string& return_to,const string& trust_root="",extension_t *ext=0);
 	    /**
 	     * verify the id_res response
 	     * @param pin the response parameters
 	     * @param identity the identity being checked (if not specified,
 	     * @param ext pointer to an extension(s) hooks object
 	     * extracted from the openid.identity parameter
 	     * @throw id_res_mismatch in case of signature mismatch
 	     * @throw id_res_setup in case of openid.user_setup_url failure
 	     * (supposedly checkid_immediate only)
 	     * @throw id_res_failed in case of failure
diff --git a/include/opkele/server.h b/include/opkele/server.h
index dd7fc41..3c25646 100644
--- a/include/opkele/server.h
+++ b/include/opkele/server.h
@@ -1,84 +1,84 @@
 #ifndef __OPKELE_SERVER_H
 #define __OPKELE_SERVER_H
 
 /**
  * @file
  * @brief OpenID server-side functionality
  */
 
 #include <opkele/types.h>
 #include <opkele/extension.h>
 
 namespace opkele {
 
     /**
      * implementation of basic server functionality
      */
     class server_t {
 	public:
 
 	    virtual ~server_t() { }
 
 	    /**
 	     * allocate the new association. The function should be overridden
 	     * in the real implementation to provide persistent assocations
 	     * store.
 	     * @param mode the mode of request being processed to base the
 	     * statelessness of the association upon
-	     * @return the auto_ptr<> for the newly allocated association_t object
+	     * @return the assoc_t for the newly allocated association_t object
 	     */
 	    virtual assoc_t alloc_assoc(mode_t mode) = 0;
 	    /**
 	     * retrieve the association. The function should be overridden in
 	     * the reqal implementation to provide persistent assocations
 	     * store.
 	     * @param h association handle
-	     * @return the auto_ptr<> for the newly allocated association_t object
+	     * @return the assoc_t for the newly allocated association_t object
 	     * @throw failed_lookup in case of failure
 	     */
 	    virtual assoc_t retrieve_assoc(const string& h) = 0;
 
 	    /**
 	     * validate the identity.
 	     * @param assoc association object
 	     * @param pin incoming request parameters
 	     * @param identity being verified
 	     * @param trust_root presented in the request
 	     * @throw exception if identity can not be confirmed
 	     */
 	    virtual void validate(const association_t& assoc,const params_t& pin,const string& identity,const string& trust_root) = 0;
 
 
 	    /**
 	     * process the associate request.
 	     * @param pin the incoming request parameters
 	     * @param pout the store for the response parameters
 	     */
 	    void associate(const params_t& pin,params_t& pout);
 	    /**
 	     * process the checkid_immediate request.
 	     * @param pin the incoming request parameters
 	     * @param return_to reference to the object to store return_to url to
 	     * @param pout the response parameters
 	     * @param ext pointer to the extension hooks object
 	     * @throw exception in case of errors or negative reply
 	     */
 	    virtual void checkid_immediate(const params_t& pin,string& return_to,params_t& pout,extension_t *ext=0);
 	    /**
 	     * process the checkid_setup request.
 	     * @param pin the incoming request parameters
 	     * @param return_to reference to the object to store return_to url to
 	     * @param pout the response parameters
 	     * @param ext pointer to the extension hooks object
 	     * @throw exception in case of errors or negative reply
 	     */
 	    virtual void checkid_setup(const params_t& pin,string& return_to,params_t& pout,extension_t *ext=0);
 	    /**
 	     * the actual functionality behind checkid_immediate() and
 	     * checkid_setup()
 	     * @param mode the request being processed (either
 	     * mode_checkid_immediate or mode_checkid_setup)
 	     * @param pin the incoming request parameters
 	     * @param return_to reference to the object to store return_to url to
 	     * @param pout the response parameters
 	     * @param ext pointer to the extension hooks object
diff --git a/include/opkele/types.h b/include/opkele/types.h
index ca07df5..d959021 100644
--- a/include/opkele/types.h
+++ b/include/opkele/types.h
@@ -1,161 +1,160 @@
 #ifndef __OPKELE_TYPES_H
 #define __OPKELE_TYPES_H
 
 /**
  * @file
  * @brief various types declarations
  */
 
 #include <ostream>
 #include <vector>
 #include <string>
 #include <map>
-#include <memory>
 #include <set>
+#include <opkele/tr1-mem.h>
 
 namespace opkele {
     using std::vector;
     using std::string;
     using std::map;
     using std::ostream;
-    using std::auto_ptr;
     using std::multimap;
     using std::set;
 
     /**
      * the OpenID operation mode
      */
     typedef enum _mode_t {
 	mode_associate,
 	mode_checkid_immediate,
 	mode_checkid_setup,
 	mode_check_association
     } mode_t;
 
     /**
      * the association secret container
      */
     class secret_t : public vector<unsigned char> {
 	public:
 
 	    /**
 	     * xor the secret and hmac together and encode, using base64
 	     * @param key_d pointer to the message digest
 	     * @param rv reference to the return value
 	     */
 	    void enxor_to_base64(const unsigned char *key_d,string& rv) const;
 	    /**
 	     * decode base64-encoded secret and xor it with the message digest
 	     * @param key_d pointer to the message digest
 	     * @param b64 base64-encoded secret value
 	     */
 	    void enxor_from_base64(const unsigned char *key_d,const string& b64);
 	    /**
 	     * plainly encode to base64 representation
 	     * @param rv reference to the return value
 	     */
 	    void to_base64(string& rv) const;
 	    /**
 	     * decode cleartext secret from base64
 	     * @param b64 base64-encoded representation of the secret value
 	     */
 	    void from_base64(const string& b64);
     };
 
     /**
      * Interface to the association.
      */
     class association_t {
 	public:
 
 	    virtual ~association_t() { }
 
 	    /**
 	     * retrieve the server with which association was established.
 	     * @return server name
 	     */
 	    virtual string server() const = 0;
 	    /**
 	     * retrieve the association handle.
 	     * @return handle
 	     */
 	    virtual string handle() const = 0;
 	    /**
 	     * retrieve the association type.
 	     * @return association type
 	     */
 	    virtual string assoc_type() const = 0;
 	    /**
 	     * retrieve the association secret.
 	     * @return association secret
 	     */
 	    virtual secret_t secret() const = 0; 
 	    /**
 	     * retrieve the number of seconds the association expires in.
 	     * @return seconds till expiration
 	     */
 	    virtual int expires_in() const = 0;
 	    /**
 	     * check whether the association is stateless.
 	     * @return true if stateless
 	     */
 	    virtual bool stateless() const = 0;
 	    /**
 	     * check whether the association is expired.
 	     * @return true if expired
 	     */
 	    virtual bool is_expired() const = 0;
     };
 
     /**
-     * the auto_ptr<> for association_t object type
+     * the shared_ptr<> for association_t object type
      */
-    typedef auto_ptr<association_t> assoc_t;
+    typedef tr1mem::shared_ptr<association_t> assoc_t;
 
     /**
      * request/response parameters map
      */
     class params_t : public map<string,string> {
 	public:
 
 	    /**
 	     * check whether the parameter is present.
 	     * @param n the parameter name
 	     * @return true if yes
 	     */
 	    bool has_param(const string& n) const;
 	    /**
 	     * retrieve the parameter (const version)
 	     * @param n the parameter name
 	     * @return the parameter value
 	     * @throw failed_lookup if there is no such parameter
 	     */
 	    const string& get_param(const string& n) const;
 	    /**
 	     * retrieve the parameter.
 	     * @param n the parameter name
 	     * @return the parameter value
 	     * @throw failed_lookup if there is no such parameter
 	     */
 	    string& get_param(const string& n);
 
 	    /**
 	     * parse the OpenID key/value data.
 	     * @param kv the OpenID key/value data
 	     */
 	    void parse_keyvalues(const string& kv);
 	    /**
 	     * sign the fields.
 	     * @param secret the secret used for signing
 	     * @param sig reference to the string, containing base64-encoded
 	     * result
 	     * @param slist the comma-separated list of fields to sign
 	     * @param prefix the string to prepend to parameter names
 	     */
 	    void sign(secret_t secret,string& sig,const string& slist,const char *prefix=0) const;
 
 	    /**
 	     * append parameters to the URL as a GET-request parameters.
 	     * @param url the base URL
 	     * @param prefix the string to prepend to parameter names
 	     * @return the ready-to-use location