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#include "telnet_connection.h"
#include "commands.h"
#include <boost/bind.hpp>
#include <boost/algorithm/string.hpp>
#include <boost/spirit/include/qi.hpp>
#include <iostream>
namespace qi = boost::spirit::qi;
telnet::Connection::Connection(boost::asio::io_service& io_service) : socket(io_service) {
}
void telnet::Connection::handle_read(const boost::system::error_code& error, size_t bytes_transferred) {
if(error) {
return;
}
std::string line;
std::istream is(&buf);
std::getline(is, line);
boost::trim(line);
if(line == "exit") {
return;
}
std::vector<std::string> args;
// failed to parse or no arguments, i.e. empty line
if(!parse_args(line, args) || !args.size()) {
start();
return;
}
std::vector<std::string> r;
try {
Commands cmd(socket.get_io_service(), args);
r = cmd();
} catch(CommandException& ce) {
std::string s(ce.what());
s += '\n';
boost::asio::write(socket, boost::asio::buffer(s));
start();
return;
}
for(std::vector<std::string>::iterator it = r.begin(); it != r.end(); it++) {
boost::asio::write(socket, boost::asio::buffer(*it + "\n"));
}
start();
}
/** Parse a given line and return a vector with its arguments.
* Arguments which are surrounded by "quotes" are interpreted as a single argument.
*/
bool telnet::Connection::parse_args(std::string& line, std::vector<std::string>& args) {
std::string::const_iterator begin = line.begin(), end = line.end();
return qi::parse(begin, end,
// find "words in quotes"
(('"' >> *(qi::char_ - '"') >> '"') |
// single words
*(qi::char_ - ' ')) %
// skip spaces between arguments
+qi::char_(' '), args);
}
void telnet::Connection::start() {
boost::asio::async_read_until(socket, buf, "\n", boost::bind(&Connection::handle_read, shared_from_this(),
boost::asio::placeholders::error, boost::asio::placeholders::bytes_transferred));
}
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