XmlRpcUtil.cpp
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00001 
00002 #include "XmlRpcUtil.h"
00003 
00004 #ifndef MAKEDEPEND
00005 # include <ctype.h>
00006 # include <iostream>
00007 # include <stdarg.h>
00008 # include <stdio.h>
00009 # include <string.h>
00010 #endif
00011 
00012 #include "XmlRpc.h"
00013 
00014 using namespace XmlRpc;
00015 
00016 
00017 //#define USE_WINDOWS_DEBUG // To make the error and log messages go to VC++ debug output
00018 #ifdef USE_WINDOWS_DEBUG
00019 #define WIN32_LEAN_AND_MEAN
00020 #include <windows.h>
00021 #endif
00022 
00023 // Version id
00024 const char XmlRpc::XMLRPC_VERSION[] = "XMLRPC++ 0.7";
00025 
00026 // Default log verbosity: 0 for no messages through 5 (writes everything)
00027 int XmlRpcLogHandler::_verbosity = 0;
00028 
00029 // Default log handler
00030 static class DefaultLogHandler : public XmlRpcLogHandler {
00031 public:
00032 
00033   void log(int level, const char* msg) { 
00034 #ifdef USE_WINDOWS_DEBUG
00035     if (level <= _verbosity) { OutputDebugString(msg); OutputDebugString("\n"); }
00036 #else
00037     if (level <= _verbosity) std::cout << msg << std::endl; 
00038 #endif  
00039   }
00040 
00041 } defaultLogHandler;
00042 
00043 // Message log singleton
00044 XmlRpcLogHandler* XmlRpcLogHandler::_logHandler = &defaultLogHandler;
00045 
00046 
00047 // Default error handler
00048 static class DefaultErrorHandler : public XmlRpcErrorHandler {
00049 public:
00050 
00051 #ifdef USE_WINDOWS_DEBUG
00052   void error(const char* msg) {
00053     OutputDebugString(msg); OutputDebugString("\n");
00054 #else
00055   void error(const char*) {
00056 #endif  
00057     // As far as I can tell, throwing an exception here is a bug, unless
00058     // the intention is that the program should exit.  Throughout the code,
00059     // calls to error() are followed by cleanup code that does things like
00060     // closing a failed socket.  Thus it would seem that it should be
00061     // possible to continue execution.  But if the user just catches the
00062     // exception that's thrown here, the library ends up in a bogus state.
00063     // So I'm commenting out the throw.  - BPG
00064     //
00065     //throw std::runtime_error(msg);
00066   }
00067 } defaultErrorHandler;
00068 
00069 
00070 // Error handler singleton
00071 XmlRpcErrorHandler* XmlRpcErrorHandler::_errorHandler = &defaultErrorHandler;
00072 
00073 
00074 // Easy API for log verbosity
00075 int XmlRpc::getVerbosity() { return XmlRpcLogHandler::getVerbosity(); }
00076 void XmlRpc::setVerbosity(int level) { XmlRpcLogHandler::setVerbosity(level); }
00077 
00078  
00079 
00080 void XmlRpcUtil::log(int level, const char* fmt, ...)
00081 {
00082   if (level <= XmlRpcLogHandler::getVerbosity())
00083   {
00084     va_list va;
00085     char buf[1024];
00086     va_start( va, fmt);
00087     vsnprintf(buf,sizeof(buf)-1,fmt,va);
00088     buf[sizeof(buf)-1] = 0;
00089     XmlRpcLogHandler::getLogHandler()->log(level, buf);
00090   }
00091 }
00092 
00093 
00094 void XmlRpcUtil::error(const char* fmt, ...)
00095 {
00096   va_list va;
00097   va_start(va, fmt);
00098   char buf[1024];
00099   vsnprintf(buf,sizeof(buf)-1,fmt,va);
00100   buf[sizeof(buf)-1] = 0;
00101   XmlRpcErrorHandler::getErrorHandler()->error(buf);
00102 }
00103 
00104 
00105 // Returns contents between <tag> and </tag>, updates offset to char after </tag>
00106 std::string 
00107 XmlRpcUtil::parseTag(const char* tag, std::string const& xml, int* offset)
00108 {
00109   if (*offset >= int(xml.length())) return std::string();
00110   size_t istart = xml.find(tag, *offset);
00111   if (istart == std::string::npos) return std::string();
00112   istart += strlen(tag);
00113   std::string etag = "</";
00114   etag += tag + 1;
00115   size_t iend = xml.find(etag, istart);
00116   if (iend == std::string::npos) return std::string();
00117 
00118   *offset = int(iend + etag.length());
00119   return xml.substr(istart, iend-istart);
00120 }
00121 
00122 
00123 // Returns true if the tag is found and updates offset to the char after the tag
00124 bool 
00125 XmlRpcUtil::findTag(const char* tag, std::string const& xml, int* offset)
00126 {
00127   if (*offset >= int(xml.length())) return false;
00128   size_t istart = xml.find(tag, *offset);
00129   if (istart == std::string::npos)
00130     return false;
00131 
00132   *offset = int(istart + strlen(tag));
00133   return true;
00134 }
00135 
00136 
00137 // Returns true if the tag is found at the specified offset (modulo any whitespace)
00138 // and updates offset to the char after the tag
00139 bool 
00140 XmlRpcUtil::nextTagIs(const char* tag, std::string const& xml, int* offset)
00141 {
00142   if (*offset >= int(xml.length())) return false;
00143   const char* cp = xml.c_str() + *offset;
00144   int nc = 0;
00145   while (*cp && isspace(*cp)) {
00146     ++cp;
00147     ++nc;
00148   }
00149 
00150   int len = int(strlen(tag));
00151   if  (*cp && (strncmp(cp, tag, len) == 0)) {
00152     *offset += nc + len;
00153     return true;
00154   }
00155   return false;
00156 }
00157 
00158 // Returns the next tag and updates offset to the char after the tag, or empty string
00159 // if the next non-whitespace character is not '<'
00160 std::string 
00161 XmlRpcUtil::getNextTag(std::string const& xml, int* offset)
00162 {
00163   if (*offset >= int(xml.length())) return std::string();
00164 
00165   size_t pos = *offset;
00166   const char* cp = xml.c_str() + pos;
00167   while (*cp && isspace(*cp)) {
00168     ++cp;
00169     ++pos;
00170   }
00171 
00172   if (*cp != '<') return std::string();
00173 
00174   std::string s;
00175   do {
00176     s += *cp;
00177     ++pos;
00178   } while (*cp++ != '>' && *cp != 0);
00179 
00180   *offset = int(pos);
00181   return s;
00182 }
00183 
00184 
00185 
00186 // xml encodings (xml-encoded entities are preceded with '&')
00187 static const char  AMP = '&';
00188 static const char  rawEntity[] = { '<',   '>',   '&',    '\'',    '\"',    0 };
00189 static const char* xmlEntity[] = { "lt;", "gt;", "amp;", "apos;", "quot;", 0 };
00190 static const int   xmlEntLen[] = { 3,     3,     4,      5,       5 };
00191 
00192 
00193 // Replace xml-encoded entities with the raw text equivalents.
00194 
00195 std::string 
00196 XmlRpcUtil::xmlDecode(const std::string& encoded)
00197 {
00198   std::string::size_type iAmp = encoded.find(AMP);
00199   if (iAmp == std::string::npos)
00200     return encoded;
00201 
00202   std::string decoded(encoded, 0, iAmp);
00203   std::string::size_type iSize = encoded.size();
00204   decoded.reserve(iSize);
00205 
00206   const char* ens = encoded.c_str();
00207   while (iAmp != iSize) {
00208     if (encoded[iAmp] == AMP && iAmp+1 < iSize) {
00209       int iEntity;
00210       for (iEntity=0; xmlEntity[iEntity] != 0; ++iEntity)
00211         //if (encoded.compare(iAmp+1, xmlEntLen[iEntity], xmlEntity[iEntity]) == 0)
00212         if (strncmp(ens+iAmp+1, xmlEntity[iEntity], xmlEntLen[iEntity]) == 0)
00213         {
00214           decoded += rawEntity[iEntity];
00215           iAmp += xmlEntLen[iEntity]+1;
00216           break;
00217         }
00218       if (xmlEntity[iEntity] == 0)    // unrecognized sequence
00219         decoded += encoded[iAmp++];
00220 
00221     } else {
00222       decoded += encoded[iAmp++];
00223     }
00224   }
00225     
00226   return decoded;
00227 }
00228 
00229 
00230 // Replace raw text with xml-encoded entities.
00231 
00232 std::string 
00233 XmlRpcUtil::xmlEncode(const std::string& raw)
00234 {
00235   std::string::size_type iRep = raw.find_first_of(rawEntity);
00236   if (iRep == std::string::npos)
00237     return raw;
00238 
00239   std::string encoded(raw, 0, iRep);
00240   std::string::size_type iSize = raw.size();
00241 
00242   while (iRep != iSize) {
00243     int iEntity;
00244     for (iEntity=0; rawEntity[iEntity] != 0; ++iEntity)
00245       if (raw[iRep] == rawEntity[iEntity])
00246       {
00247         encoded += AMP;
00248         encoded += xmlEntity[iEntity];
00249         break;
00250       }
00251     if (rawEntity[iEntity] == 0)
00252       encoded += raw[iRep];
00253     ++iRep;
00254   }
00255   return encoded;
00256 }
00257 
00258 
00259 


xmlrpcpp
Author(s): Chris Morley and Konstantin Pilipchuk, slight modifications and ROS wrapping by Morgan Quigley
autogenerated on Sat Dec 28 2013 17:42:59