e016bd61f8
* Postgis plug-in determines encoding by querying 'client_encoding' parameter (libpq). * Shapfiles (dbf!) don't store character encoding information. Users can apply 'encoding' parameter at datasource creation stage (defaults to Latin1 (ISO-8859-1)) * Raster plug-in utf-8
108 lines
3.1 KiB
C++
108 lines
3.1 KiB
C++
/*****************************************************************************
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*
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* This file is part of Mapnik (c++ mapping toolkit)
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*
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* Copyright (C) 2006 Artem Pavlenko
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*****************************************************************************/
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//$Id: connection.hpp 17 2005-03-08 23:58:43Z pavlenko $
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#ifndef CONNECTION_HPP
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#define CONNECTION_HPP
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extern "C"
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{
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#include "libpq-fe.h"
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}
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#include "resultset.hpp"
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using namespace mapnik;
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class ResultSet;
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class Connection
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{
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private:
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PGconn *conn_;
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public:
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Connection(std::string const& uri,
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std::string const& port,
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std::string const& dbname,
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std::string const& username,
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std::string const& password)
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{
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std::string connStr="host="+uri;
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if (port.length()) connStr+=" port="+port;
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connStr+=" dbname="+dbname;
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connStr+=" user="+username;
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connStr+=" password="+password;
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connStr+=" connect_timeout=4"; // todo: set by client (param)
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conn_=PQconnectdb(connStr.c_str());
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if (PQstatus(conn_) == CONNECTION_BAD)
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{
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std::clog << "connection to "<< connStr << " failed\n"
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<< PQerrorMessage(conn_)<< std::endl;
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}
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}
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bool execute(const std::string& sql) const
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{
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PGresult *result=PQexec(conn_,sql.c_str());
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bool ok=(result && PQresultStatus(result)==PGRES_COMMAND_OK);
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PQclear(result);
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return ok;
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}
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boost::shared_ptr<ResultSet> executeQuery(const std::string& sql,int type=0) const
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{
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PGresult *result=0;
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if (type==1)
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{
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result=PQexecParams(conn_,sql.c_str(),0,0,0,0,0,1);
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return boost::shared_ptr<ResultSet>(new ResultSet(result));
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}
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result=PQexec(conn_,sql.c_str());
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return boost::shared_ptr<ResultSet>(new ResultSet(result));
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}
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std::string client_encoding() const
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{
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return PQparameterStatus(conn_,"client_encoding");
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}
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bool isOK() const
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{
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return (PQstatus(conn_)!=CONNECTION_BAD);
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}
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void close()
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{
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PQfinish(conn_);
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}
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~Connection()
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{
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PQfinish(conn_);
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#ifdef MAPNIK_DEBUG
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std::clog << "close connection " << conn_ << "\n";
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#endif
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}
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};
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#endif //CONNECTION_HPP
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