BESInfo.cc

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00001 // BESInfo.cc
00002 
00003 // This file is part of bes, A C++ back-end server implementation framework
00004 // for the OPeNDAP Data Access Protocol.
00005 
00006 // Copyright (c) 2004,2005 University Corporation for Atmospheric Research
00007 // Author: Patrick West <pwest@ucar.edu> and Jose Garcia <jgarcia@ucar.edu>
00008 //
00009 // This library is free software; you can redistribute it and/or
00010 // modify it under the terms of the GNU Lesser General Public
00011 // License as published by the Free Software Foundation; either
00012 // version 2.1 of the License, or (at your option) any later version.
00013 // 
00014 // This library is distributed in the hope that it will be useful,
00015 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00016 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00017 // Lesser General Public License for more details.
00018 // 
00019 // You should have received a copy of the GNU Lesser General Public
00020 // License along with this library; if not, write to the Free Software
00021 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00022 //
00023 // You can contact University Corporation for Atmospheric Research at
00024 // 3080 Center Green Drive, Boulder, CO 80301
00025  
00026 // (c) COPYRIGHT University Corporation for Atmostpheric Research 2004-2005
00027 // Please read the full copyright statement in the file COPYRIGHT_UCAR.
00028 //
00029 // Authors:
00030 //      pwest       Patrick West <pwest@ucar.edu>
00031 //      jgarcia     Jose Garcia <jgarcia@ucar.edu>
00032 
00033 #include <sstream>
00034 #include <iostream>
00035 #include <fstream>
00036 
00037 using std::ostringstream ;
00038 using std::ifstream ;
00039 
00040 #include "BESInfo.h"
00041 #include "TheBESKeys.h"
00042 #include "BESHandlerException.h"
00043 
00044 #define BES_INFO_FILE_BUFFER_SIZE 4096
00045 
00051 BESInfo::BESInfo( )
00052     : _strm( 0 ),
00053       _buffered( true )
00054 {
00055     _strm = new ostringstream ;
00056 }
00057 
00066 BESInfo::BESInfo( const string &key )
00067     : _strm( 0 ),
00068       _buffered( true )
00069 {
00070     bool found = false ;
00071     string b = TheBESKeys::TheKeys()->get_key( key, found ) ;
00072     if( b == "true" || b == "True" || b == "TRUE" ||
00073         b == "yes" || b == "Yes" || b == "YES" )
00074     {
00075         _strm = new ostringstream ;
00076         _buffered = true ;
00077     }
00078     else
00079     {
00080         _buffered = false ;
00081     }
00082 }
00083 
00084 BESInfo::~BESInfo()
00085 {
00086     if( _buffered && _strm ) delete _strm ;
00087 }
00088 
00089 void
00090 BESInfo::begin_response( const string &response_name )
00091 {
00092     _response_started = true ;
00093     _response_name = response_name ;
00094 }
00095 
00096 void
00097 BESInfo::end_response( )
00098 {
00099     _response_started = false ;
00100     if( _tags.size() )
00101     {
00102         string s = "Not all tags were ended in info response" ;
00103         throw BESHandlerException( s, __FILE__, __LINE__ ) ;
00104     }
00105 }
00106 
00107 void
00108 BESInfo::begin_tag( const string &tag_name,
00109                     map<string,string> *attrs )
00110 {
00111     _tags.push( tag_name ) ;
00112 }
00113 
00114 void
00115 BESInfo::end_tag( const string &tag_name )
00116 {
00117     if( _tags.size() == 0 || _tags.top() != tag_name )
00118     {
00119         string s = (string)"tag " + tag_name
00120                    + " already ended or not started" ;
00121         throw BESHandlerException( s, __FILE__, __LINE__ ) ;
00122     }
00123     else
00124     {
00125         _tags.pop() ;
00126     }
00127 }
00128 
00134 void
00135 BESInfo::add_data( const string &s )
00136 {
00137     if( !_buffered )
00138     {
00139         fprintf( stdout, "%s", s.c_str() ) ;
00140     }
00141     else
00142     {
00143         (*_strm) << s ;
00144     }
00145 }
00146 
00162 void
00163 BESInfo::add_data_from_file( const string &key, const string &name )
00164 {
00165     bool found = false ;
00166     string file = TheBESKeys::TheKeys()->get_key( key, found ) ;
00167     if( found == false )
00168     {
00169         add_data( name + " file key " + key + " not found, information not available\n" ) ;
00170     }
00171     else
00172     {
00173         ifstream ifs( file.c_str() ) ;
00174         if( !ifs )
00175         {
00176             add_data( name + " file " + file + " not found, information not available\n" ) ;
00177         }
00178         else
00179         {
00180             char line[BES_INFO_FILE_BUFFER_SIZE] ;
00181             while( !ifs.eof() )
00182             {
00183                 ifs.getline( line, BES_INFO_FILE_BUFFER_SIZE ) ;
00184                 if( !ifs.eof() )
00185                 {
00186                     add_data( line ) ;
00187                     add_data( "\n" ) ;
00188                 }
00189             }
00190             ifs.close() ;
00191         }
00192     }
00193 }
00194 
00204 void
00205 BESInfo::add_exception( BESException &e )
00206 {
00207     begin_tag( "BESException" ) ;
00208     add_tag( "Type", e.get_context() ) ;
00209     add_tag( "Message", e.get_message() ) ;
00210     begin_tag( "Location" ) ;
00211     add_tag( "File", e.get_file() ) ;
00212     ostringstream sline ;
00213     sline << e.get_line() ;
00214     add_tag( "Line", sline.str() ) ;
00215     end_tag( "Location" ) ;
00216     end_tag( "BESException" ) ;
00217 }
00218 
00227 void
00228 BESInfo::print(FILE *out)
00229 {
00230     if( _buffered )
00231     {
00232         fprintf( out, "%s", ((ostringstream *)_strm)->str().c_str() ) ;
00233     }
00234 }
00235 
00243 void
00244 BESInfo::dump( ostream &strm ) const
00245 {
00246     strm << BESIndent::LMarg << "BESInfo::dump - ("
00247                              << (void *)this << ")" << endl ;
00248     BESIndent::Indent() ;
00249     strm << BESIndent::LMarg << "response name: " << _response_name << endl ;
00250     strm << BESIndent::LMarg << "is it buffered? " << _buffered << endl ;
00251     strm << BESIndent::LMarg << "has response been started? " << _response_started << endl ;
00252     if( _tags.size() )
00253     {
00254         strm << BESIndent::LMarg << "tags:" << endl ;
00255         BESIndent::Indent() ;
00256         stack<string> temp_tags = _tags ;
00257         while( !temp_tags.empty() )
00258         {
00259             string tag = temp_tags.top() ;
00260             strm << BESIndent::LMarg << tag << endl ;
00261             temp_tags.pop() ;
00262         }
00263         BESIndent::UnIndent() ;
00264     }
00265     else
00266     {
00267         strm << BESIndent::LMarg << "tags: empty" << endl ;
00268     }
00269     BESIndent::UnIndent() ;
00270 }
00271 

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