boost-base64.cxx

#include <boost/archive/iterators/base64_from_binary.hpp>
#include <boost/archive/iterators/binary_from_base64.hpp>
#include <boost/archive/iterators/transform_width.hpp>
#include <string>
#include <iostream>
#include <sstream>
using namespace std;
using namespace boost::archive::iterators;
 
bool Base64Encode( const string & input, string * output )
{
  typedef base64_from_binary<transform_width<string::const_iterator, 6, 8>> Base64EncodeIterator;
  stringstream result;
  try {
    copy( Base64EncodeIterator( input.begin() ), Base64EncodeIterator( input.end() ), ostream_iterator<char>( result ) );
  } catch ( ... ) {
    return false;
  }
  size_t equal_count = (3 - input.length() % 3) % 3;
  for ( size_t i = 0; i < equal_count; i++ )
    {
      result.put( '=' );
    }
  *output = result.str();
  return output->empty() == false;
}
 
bool Base64Decode( const string & input, string * output )
{
  typedef transform_width<binary_from_base64<string::const_iterator>, 8, 6> Base64DecodeIterator;
  stringstream result;
  try {
    copy( Base64DecodeIterator( input.begin() ), Base64DecodeIterator( input.end() ), ostream_iterator<char>( result ) );
  } catch ( ... ) {
    return false;
  }
  *output = result.str();
  return output->empty() == false;
}
 
int main(int argc, char* argv[])
{
  cout << "C/C++中使用Base64编码解码(使用boost库)" << endl;
 
  string input_str("http://blog.csdn.net/qq0824?viewmode=contents");
  string base64_str, output_str;
 
  cout << "origin text: \n" << input_str << endl;
 
  Base64Encode(input_str, &base64_str);
  cout << "encode: \n" << base64_str << endl;
 
  Base64Decode(base64_str, &output_str);
  cout << "decode: \n"<<output_str << endl;
 
  // system("pause");
  return 0;
}