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ftaclient.cpp
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ftaclient.cpp
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#include <iostream>
#include <string>
#include <boost/asio.hpp>
#include <fstream>
#include <boost/shared_ptr.hpp>
#include <boost/cstdint.hpp>
#include <boost/function.hpp>
#include <boost/date_time/posix_time/posix_time.hpp>
#include <boost/enable_shared_from_this.hpp>
#include <boost/make_shared.hpp>
#include <boost/crc.hpp>
//#include <boost/system.hpp>
#include <boost/bind.hpp>
#include <unordered_map>
#include "packed_message.h"
#include "segment.pb.h"
#include "fta_request.pb.h"
#include "rtp.hpp"
#include <stdlib.h> /* srand, rand */
#include <ctime>
#define FTA_DEBUG false
typedef boost::shared_ptr<fta_request> request_ptr;
// not_receiving and not sending are used to track whether requests are done before
// prompting for a new one
bool not_receiving=true;
bool not_sending=true;
void client_get_handler(request_ptr request, boost::shared_ptr<data_buffer> data, boost::shared_ptr<rtp::Connection> conn,
boost::shared_ptr<rtp::Socket> socket, int size, int current_index, bool killed);
void post(request_ptr request, boost::shared_ptr<rtp::Connection> conn, boost::shared_ptr<rtp::Socket> socket);
void handle_req(request_ptr request, int req_type, boost::shared_ptr<rtp::Connection> conn,
boost::shared_ptr<rtp::Socket> socket, bool killed);
void accept_command(boost::shared_ptr<rtp::Connection> conn, boost::shared_ptr<rtp::Socket> socket);
unsigned decode_header(const data_buffer& buf)
{
if (buf.size() < 4)
return 0;
unsigned msg_size = 0;
for (unsigned i = 0; i < 4; ++i)
{
msg_size = msg_size * 256 + (static_cast<unsigned>((char)buf[i]) & 0xFF);
}
return msg_size;
}
void encode_header(data_buffer& buf, unsigned size)
{
assert(buf.size() >= HEADER_SIZE);
buf[0] = static_cast<boost::uint8_t>((size >> 24) & 0xFF);
buf[1] = static_cast<boost::uint8_t>((size >> 16) & 0xFF);
buf[2] = static_cast<boost::uint8_t>((size >> 8) & 0xFF);
buf[3] = static_cast<boost::uint8_t>(size & 0xFF);
}
std::vector<std::string> &split(const std::string &s, char delim, std::vector<std::string> &elems) {
std::stringstream ss(s);
std::string item;
while (std::getline(ss, item, delim)) {
elems.push_back(item);
}
return elems;
}
// splits a string based on a delimiter
std::vector<std::string> split(const std::string &s, char delim) {
std::vector<std::string> elems;
split(s, delim, elems);
return elems;
}
// get the size of a file based on its filename
int get_file_size(std::string filename)
{
std::ifstream file;
file.open(filename, std::ios::binary);
file.unsetf(std::ios::skipws);
int fileSize;
file.seekg(0, std::ios::end);
fileSize = file.tellg();
file.close();
return fileSize;
}
// finish handler for the client, called when all requests, get or post, are done
void client_finish(boost::shared_ptr<rtp::Connection> conn, boost::shared_ptr<rtp::Socket> socket_, bool is_get, bool killed)
{
if (is_get)
{
not_receiving=true;
}
else
{
not_sending=true;
}
if(not_sending && not_receiving && !killed)
{
accept_command(conn, socket_); // when the client is done sending and receiving prompt for a
// new request
}
if(killed)
{
socket_->close();
}
}
void handle_req(request_ptr request, int req_type, boost::shared_ptr<rtp::Connection> conn,
boost::shared_ptr<rtp::Socket> socket, bool killed)
{
//client_finish(conn, socket, killed);
boost::shared_ptr<data_buffer> storage(boost::make_shared<data_buffer>(0));
if(req_type==1 || req_type==3)
{
not_receiving=false;
conn->async_rcv(storage, boost::bind(&client_get_handler,request, storage, conn, socket, 0, 0, _1));
}
if(req_type==2 || req_type==3)
{
not_sending=false;
post(request, conn, socket);
}
}
// based on user input creates a request packet which is then sent to the server which indicates
// to the server what it should do. ie get or post
void accept_command(boost::shared_ptr<rtp::Connection> conn, boost::shared_ptr<rtp::Socket> socket)
{
boost::shared_ptr<data_buffer> message = boost::make_shared<data_buffer>(0);
request_ptr request= boost::make_shared<fta_request>();
std::string command_str;
std::cout << "Command: ";
getline(std::cin, command_str);
std::vector<std::string> command_info = split(command_str, ' ');
std::string command_type = command_info[0];
if(FTA_DEBUG)std::cout << command_str << std::endl;
if (command_type == "disconnect"&& (int)command_info.size()==1)
{
conn->close_connection();
socket->close();
}
else if (command_type == "get" && (int)command_info.size()==2)
{
request->set_get(true);
request->set_get_filename(command_info[1]);
PackedMessage<fta_request> m_packed_request(request);
m_packed_request.pack(*message);
if(FTA_DEBUG)
{
std::cout <<"MESSAGE SIZE\n";
std::cout << message->size() << std::endl;
}
// sends the message, when the message is sent run the handle_req callback
conn->async_send(message, boost::bind(&handle_req, request, 1, conn, socket, _1));
}
else if (command_type == "post" && (int)command_info.size()==2)
{
request->set_post(true);
request->set_post_filename(command_info[1]);
request->set_post_size(get_file_size(command_info[1]));
PackedMessage<fta_request> m_packed_request(request);
m_packed_request.pack(*message);
// sends the message, when the message is sent run the handle_req callback
conn->async_send(message, boost::bind(&handle_req, request, 2, conn, socket, _1));
}
else if (command_type == "get-post" && (int)command_info.size()==3)
{
request->set_get(true);
request->set_get_filename(command_info[1]);
request->set_post(true);
request->set_post_filename(command_info[2]);
request->set_post_size(get_file_size(command_info[2]));
PackedMessage<fta_request> m_packed_request(request);
m_packed_request.pack(*message);
// sends the message, when the message is sent run the handle_req callback
conn->async_send(message, boost::bind(&handle_req, request, 3, conn, socket, _1));
}
if (FTA_DEBUG)
{
std::cout << "Is Get: " << request->get() << "\n";
std::cout << "Is Post: " << request->post() << "\n";
std::cout << "POST FILENAME" << "\n";
std::cout << request->post_filename()<< "\n";
std::cout << "GET FILENAME" << "\n";
std::cout << request->get_filename() << std::endl;;
}
}
// get request handler, receives data from server
void client_get_handler(request_ptr request, boost::shared_ptr<data_buffer> data, boost::shared_ptr<rtp::Connection> conn,
boost::shared_ptr<rtp::Socket> socket, int size, int current_index, bool killed)
{
if(!killed)
{
if (data->size() > 0)
{
std::string msg;
if(FTA_DEBUG)std::cout << "IN THE GET FUNCTION" << std::endl;
std::ofstream out;
if (size > 0)
{
msg.assign(data->begin(), data->end());
out.open("get_"+request->get_filename(), std::ios::app | std::ios::out);
}
else if(data->size() >= 4)
{
out.open("get_"+request->get_filename(), std::ios::out);
size = decode_header(*data);
if(FTA_DEBUG) std::cout << "MESSAGE SIZE " << size <<std::endl;
msg.assign(data->begin()+4, data->end());
}
if (current_index < size)
{
out << msg;
out.close();
current_index += msg.size();
if (current_index < size)
{
boost::shared_ptr<data_buffer> storage(boost::make_shared<data_buffer>(0));
conn->async_rcv(storage, boost::bind(&client_get_handler, request, storage,
conn, socket, size, current_index, _1));
}
else
{
client_finish(conn, socket, true, killed);
}
}
}
else
{
boost::shared_ptr<data_buffer> storage(boost::make_shared<data_buffer>(0));
conn->async_rcv(storage, boost::bind(&client_get_handler, request, storage, conn, socket,
size, current_index, _1));
}
}
else
{
client_finish(conn, socket, true, killed);
}
}
// post request handler, loads file into memory then sends it
void post(request_ptr request, boost::shared_ptr<rtp::Connection> conn, boost::shared_ptr<rtp::Socket> socket)
{
std::ifstream file;
file.open(request->post_filename(), std::ios::binary);
file.unsetf(std::ios::skipws);
std::streampos fileSize;
file.seekg(0, std::ios::end);
fileSize = file.tellg();
if(FTA_DEBUG)std::cout << fileSize <<std::endl;
file.seekg(0, std::ios::beg);
boost::shared_ptr<data_buffer> bytes(boost::make_shared<data_buffer>(0));
while (!file.eof())
{
char byte;
file >> byte;
if (file.fail())
{
//error
break;
}
bytes->push_back((uint8_t)byte);
}
conn->async_send(bytes, boost::bind(&client_finish, conn, socket, false, _1));
}
// based on command line arguments connect to server
int main(int argc, char* argv[])
{
srand(time(0));
boost::asio::io_service io_service_;
boost::shared_ptr<rtp::Socket> socket;
std::string ip;
std::string port;
int window_size = 20000;
if (argc == 3)
{
std::vector<std::string> ip_port = split(argv[1], ':');
ip =ip_port[0];
port = ip_port[1];
window_size = std::stoi(std::string(argv[2]));
}
else
{
ip = u8"127.0.0.1";
port = u8"4545";
}
int lp = rand()% 30000 + 4000;
std::string local_port = std::to_string(lp);
socket.reset(new rtp::Socket(io_service_, u8"127.0.0.1", local_port, window_size));
boost::shared_ptr<rtp::Connection> conn = socket->create_connection(ip, port);
boost::asio::deadline_timer starttimer(io_service_, boost::posix_time::milliseconds(1000));
starttimer.async_wait(boost::bind(&accept_command, conn, socket));
io_service_.run();
return 0;
}