#include "interface.h"#include "unistd.h"using namespace std;Interface::Interface() {	client = NULL;	passive = false;}void Interface::start() {	while(true) {		cout << "ftp" << (client ? ":"+string(dir) : "") + "> ";		string command;		getline(cin, command);		try {			if(command.substr(0, 5)=="open ") {				if(client) {					client->quit();					delete client;				}				if(logon(command.substr(5))) {					if(client->syst()!=215) continue;					if(client->port(rand())!=200) continue;					client->pwd(dir);				}			} else if(command=="close") {				if(client) {					client->quit();					delete client;					client = NULL;				}			} else if(command=="passive") {				passive = !passive;				cout << "\t[M] Passive mode " << (passive ? "on" : "off") << endl;			} else if(command=="ascii") {				if(client) client->type(Tcp::ASCII);			} else if(command=="binary") {				if(client) client->type(Tcp::IMAGE);			} else if(command=="pwd") {				if(client) client->pwd(dir);			} else if(command.substr(0, 2)=="ls") {				if(command.length()==2) {					if(client) {						if(passive) client->pasv();						client->list();					}				} else if(command.length()>3 && command[2]==' ') {					if(client) {						if(passive) client->pasv();						client->list(command.substr(3));					}				} else					cerr << "ERROR: Invalid command" << endl;			} else if(command.substr(0, 3)=="cd ") {				if(client && client->cwd(command.substr(3))==250)					dir.cd(command.substr(3));			} else if(command.substr(0, 4)=="get ") {					if(client) {						if(passive) client->pasv();						client->retr(command.substr(4));					}			} else if(command.substr(0, 4)=="put ") {					if(client)						if(command.substr(4, 6)=="ftp://") {							// transfer between servers							unsigned int slash = command.find('/', 10);							Client* receiver = client;							if(!logon(command.substr(10, slash-10))) continue;							if(receiver->connect(client))								receiver->transfer(client, command.substr(slash));							client->quit();							delete client;							client = receiver;						} else {							if(passive) client->pasv();							client->stor(command.substr(4));						}			} else if(command.substr(0, 7)=="append ") {					if(client) {						if(passive) client->pasv();						client->appe(command.substr(7));					}			} else if(command.substr(0, 4)=="help") {				if(command.length()==4) {					if(client) client->help();				} else if(command.length()>5 && command[4]==' ') {					if(client) client->help(command.substr(5));				} else					cerr << "ERROR: Invalid command" << endl;			} else if(command=="quit") {				if(client) {					client->quit();					delete client;				}				return;			} else				cerr << "ERROR: Invalid command" << endl;		} catch(const char* message) {			cerr << "ERROR: " << message << endl;		}	}}bool Interface::logon(const string& url) {	unsigned int colon = url.find(':');	if(colon==string::npos)		client = new Client(url);	else		client = new Client(url.substr(0, colon), atoi(url.substr(colon+1).c_str()));	cout << "Username: ";	string username;	getline(cin, username);	int reply = username.length() ? client->user(username): client->user();	if(reply==331)		reply = client->pass(getpass("Password: "));	if(reply==230)		return true;	else {		delete client;		client = NULL;		return false;	}}int main() {	Interface interface;	interface.start();	return 0;}