Implemented a simple 'ls' command for the telnet server.

1 files changed, 65 insertions, 1 deletions

diff --git a/telnet_connection.cpp b/telnet_connection.cpp
index e2ea96f..457d1ba 100644
--- a/telnet_connection.cpp
+++ b/telnet_connection.cpp
@@ -1,12 +1,76 @@
 #include "telnet_connection.h"
+#include "commands.h"
 
 #include <boost/bind.hpp>
+#include <boost/algorithm/string.hpp>
+#include <boost/algorithm/string/regex.hpp>
+#include <boost/format.hpp>
+
+#include <iostream>
 
 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) {
-	boost::asio::write(socket, buf);
+	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 = parse_args(line);
+	// no arguments, i.e. empty line
+	if(!args.size()) {
+		start();
+		return;
+	}
+
+	std::vector<std::string> r;
+	try {
+		r = commands::execute(args);
+	} catch(commands::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();
+}
+
+std::vector<std::string> telnet::Connection::parse_args(std::string& line) {
+	std::string::const_iterator begin = line.begin();
+	std::string::const_iterator end = line.end();
+
+	boost::regex re("(\")?((?(1)[^\"]|[^ ])+)(?(1)\")");
+	boost::match_results<std::string::const_iterator> what;
+	boost::match_flag_type flags = boost::match_default;
+
+	std::vector<std::string> args;
+
+	while(boost::regex_search(begin, end, what, re, flags)) {
+		std::string s = std::string(what[2].first, what[2].second);
+		boost::algorithm::trim(s);
+		// avoid empty strings when parsing multi-word arguments (a "b c")
+		if(s.size()) {
+			args.push_back(s);
+		}
+		begin = what[0].second;
+	}
+
+	return args;
 }
 
 void telnet::Connection::start() {