id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
12131	Boost Asio async HTTP Client example source code incorrect	Micah Quinn <micah.quinn@…>	chris_kohlhoff	"The example source code for the async HTTP Client (http://www.boost.org/doc/libs/1_60_0/doc/html/boost_asio/example/cpp03/http/client/async_client.cpp) does not output the final read bytes inside ""handle_read_content"" if the parameter to the transfer_at_least(x) algorithm is greater than one. The code prematurely checks for an error code and disregards any already read data.

The current code in question:

{{{
void handle_read_content(const boost::system::error_code& err)
  {
    if (!err)
    {
      // Write all of the data that has been read so far.
      std::cout << &response_;

      // Continue reading remaining data until EOF.
      boost::asio::async_read(socket_, response_,
          boost::asio::transfer_at_least(1),
          boost::bind(&client::handle_read_content, this,
            boost::asio::placeholders::error));
    }
    else if (err != boost::asio::error::eof)
    {
      std::cout << ""Error: "" << err << ""\n"";
    }
  }
}}}

One possible ""fix"" for the code would be:

{{{
 void handle_read_content(const boost::system::error_code& err)
  {

    // Write all of the data that has been read so far.
    if ( response_.size() > 0 )
      std::cout << &response_;

    if (!err)
    {
      // Continue reading remaining data until EOF.
      boost::asio::async_read(socket_, response_,
          boost::asio::transfer_at_least(1024),
          boost::bind(&client::handle_read_content, this,
            boost::asio::placeholders::error));
    }
    else if (err != boost::asio::error::eof)
    {
      std::cout << ""Error: "" << err << ""\n"";
    }
  }
}}}"	Bugs	new	To Be Determined	asio	Boost 1.61.0	Problem