C++访问Redis的mset 二进制数据接口封装方案

void msetNotBinary(redisContext *c, const vector<string> &vtKey, const vector<string> & vtVal )
{
  if(vtKey.size() != vtVal.size())
  {
    throw runtime_error( "Redis error" );
  }

  string strCmd = "MSET";
  for(int i = 0; i < vtKey.size(); i++)
  {
    strCmd += " "+vtKey[i]+" "+vtVal[i];
  }
  cout << "strCmd:" << strCmd << endl;

  void * r = redisCommand(c, strCmd.c_str() );
  if ( !r )
    throw runtime_error( "Redis error" );
  freeReplyObject( r );
}

void do_test( redisContext *c )
{  
  vector<string> vtKey;
  vector<string> vtVal;

  vtKey.push_back("A");
  vtVal.push_back("AAAA");
  vtKey.push_back("B");
  vtVal.push_back("BBBB");
  vtKey.push_back("C");
  vtVal.push_back("CCCC");
  //add a binary data
  vtKey.push_back("D");
  vtVal.push_back("");
  char a[] = "ABCDE";
  a[2] = 0;
  vtVal[3].assign(a,5);

  try
  {
    msetNotBinary(c, vtKey, vtVal );
    //mset1( c, vtKey, vtVal );
    //mset2( c, vtKey, vtVal );
  }
  catch ( runtime_error & )
  {
    cout << "Error" << endl;
  }
}

int main(int argc, char *argv[])
{
  redisContext *c;

  c = redisConnect("127.0.0.1",6379);
  if (c->err)
   {
    cout << "Connection error: " << c->errstr << endl;
    return -1;
  }

  do_test(c);

  redisFree(c);

  return 0;
}

void mset1( redisContext *c, const vector<string> &vtKey, const vector<string> & vtVal )
{
  if(vtKey.size() != vtVal.size())
  {
    throw runtime_error( "Redis error" );
  }

  char ** argv = new char*[vtKey.size() + vtVal.size() + 1 ];
  size_t * argvlen = new size_t[vtKey.size() + vtVal.size() + 1 ];

  int j = 0;
  argv[j] = new char[5];
  memcpy(argv[j],"MSET",4);
  argvlen[j] = 4;
  ++j;


  for(int i = 0 ; i < vtKey.size();i++)
  {  
    argvlen[j] = vtKey[i].length();
    argv[j] = new char[argvlen[j]];
     memset((void*)argv[j],0,argvlen[j] );
    memcpy((void*)argv[j],vtKey[i].data(),vtKey[i].length());
    j++;

    argvlen[j] = vtVal[i].length();
    argv[j] = new char[argvlen[j]];
    memset((void*)argv[j],0,argvlen[j]);
    memcpy((void*)argv[j],vtVal[i].data(),vtVal[i].length());
    j++;
  }

  //if not use const_cast<const char**> ,compile error
  //for why assign from char** to const char** error, see my blog ...
   void *r = redisCommandArgv(c, vtKey.size() + vtVal.size() + 1, const_cast<const char**>(argv), argvlen );
  if ( !r )
    throw runtime_error( "Redis error" );
  freeReplyObject( r );

  for(int i = 0;i < vtKey.size();i++)
  {
    delete [] argv[i];
    argv[i] = NULL;
  }

  delete []argv;
  delete []argvlen;
  argv = NULL;
}

void mset2( redisContext *c, const vector<string> &vtKey, const vector<string> & vtVal)
{
  if(vtKey.size() != vtVal.size())
  {
    throw runtime_error( "Redis error" );
  }

  vector<const char *> argv( vtKey.size() + vtVal.size() + 1 );
  vector<size_t> argvlen( vtKey.size() + vtVal.size() + 1 );
  int j = 0;

  static char msetcmd[] = "MSET";
  argv[j] = msetcmd;
  argvlen[j] = sizeof(msetcmd)-1;
  ++j;

  for(int i = 0;i< vtKey.size();++i)
  {
    argvlen[j] = vtKey[i].length();
    argv[j] = new char[argvlen[j]];
     memset((void*)argv[j],0,argvlen[j] );
    memcpy((void*)argv[j],vtKey[i].data(),vtKey[i].length());
    j++;

    argvlen[j] = vtVal[i].length();
    argv[j] = new char[argvlen[j]];
    memset((void*)argv[j],0,argvlen[j]);
    memcpy((void*)argv[j],vtVal[i].data(),vtVal[i].length());
    j++;
  }

  void *r = redisCommandArgv(c, argv.size(), &(argv[0]), &(argvlen[0]) );
  if ( !r )
    throw runtime_error( "Redis error" );
  freeReplyObject( r );
}