#include<winsock.h>
#include<iostream>
#include<fstream>
#include<cstring> 
#pragma comment(lib,"wsock32.lib")


using namespace std;	

	
SOCKET client;
SOCKET server;	


char file[50];
char send_file[5000];
char *str_file;
char *file_dir;
int a;
ifstream infile;
	
int main()
{
	WORD sockversion;
	WSADATA wsaData;
	int net;
	
	sockversion=MAKEWORD(1,1);
	WSAStartup(sockversion,&wsaData);
	
	cout<<"ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ\n";
	cout<<"Quick-e FTP server\n";
	cout<<"ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ\n";
	
	server=socket(PF_INET,SOCK_STREAM,IPPROTO_TCP);
	if(server==INVALID_SOCKET)
	{
		cout<<"invalid socket\n";
		WSACleanup();
		return 0;
	}
	
	sockaddr_in sin;
	sin.sin_family=AF_INET;
	sin.sin_port=htons(21);
	sin.sin_addr.s_addr=INADDR_ANY;
	
	net=bind(server,(LPSOCKADDR)&sin,sizeof(sin));
	if(net==SOCKET_ERROR)
	{
		cout<<"failed bind\n";
		WSACleanup();
		return 0;
	}
	
	if((net=listen(server,4))!=SOCKET_ERROR)
	{
			
		client=accept(server,NULL,NULL);
		if(client==INVALID_SOCKET)
		{
			cout<<"error accepting connection\n";
		}
		else
		{
			cout<<"client connected\n";
		}
		
		for(;;)
		{
			a=recv(client,file,sizeof(file),0);    //recieve file request from client
			if(a==SOCKET_ERROR)
			{
				int error=WSAGetLastError();
				if(error==WSAENOTCONN)
				{
					cout<<"client not connected\n";
					WSACleanup();
				}
				else if(error==WSAESHUTDOWN)
				{
					cout<<"client disconnected\n";
					WSACleanup();
				}
				cout<<"failed to recieve file request\n";
			}
			else
			{
				cout<<file<<endl;
			}
				
			infile.open(file,ios::binary);           //open filename sent by client
			if(infile)
			{
				while(!infile.eof())               //while the end of file is not reached 
				{									//retrieve data from the file and send it to the client
					infile.get(send_file,sizeof(send_file));
					infile.ignore(80,'\n');
					send(server,send_file,sizeof(send_file),0);    
				}
			}
			else
			{
				cout<<"invalid file name\n";
				send(server,"invalid file name",sizeof("invalid file name"),0);
			}
			infile.close();
		}
		WSACleanup();
		closesocket(client);
	}
	WSACleanup();
	closesocket(client);
	return 0;
}

#include<winsock.h>
#include<iostream>
#include<fstream>
#include<cstring> 
#pragma comment(lib,"wsock32.lib")
#define MAXBUFLEN 500
	
using namespace std;	

	
SOCKET client;
SOCKET server;	


char file[50];
char recv_file[5000];
int a;
int count=0;
	
int main()
{
	WORD sockversion;
	WSADATA wsaData;
	int net;
	
	char rdata[500];
	char data[500];
	
	sockversion=MAKEWORD(1,1);
	WSAStartup(sockversion,&wsaData);
	
	client=socket(PF_INET,SOCK_STREAM,IPPROTO_TCP);
	if(server==INVALID_SOCKET)
	{
		cout<<"invalid socket\n";
		WSACleanup();
		return 0;
	}
	
	sockaddr_in sin;
	sin.sin_family=AF_INET;
	sin.sin_port=htons(21);
	sin.sin_addr.s_addr=inet_addr("127.0.0.1");
	
	if(connect(client,(LPSOCKADDR)&sin,sizeof(sin))!=SOCKET_ERROR)
	{
		cout<<"connected to FTP server\n";
		while(strcmp(file,"exit ftp")!=0)
		{
			int a;
			ifstream infile;
			ofstream outfile;
			
			cout<<"get file: ";         //enter file to get
			cin.get(file,49);
			cin.ignore(80,'\n');
			
			a=send(client,file,sizeof(file),0);       //send file request to server
			if(a==SOCKET_ERROR)
			{
				cout<<"failed to send file request\n";
			}
			
			outfile.open(file,ios::out);               //open the requested file
			if(outfile)
			{
				while(SOCKET_ERROR)                    //while SOCKET_ERROR recieve file date  
				{     									//from server and write it to the file
					count++;
					
					a=recv(client,recv_file,sizeof(recv_file),0);    
					if(a==SOCKET_ERROR)
					{
						int error=WSAGetLastError();
						if(error==WSAENOTCONN)
						{
							cout<<"socket not connected\n";
							WSACleanup();
							return 1;
						}
						else if(error==WSAESHUTDOWN)
						{
							cout<<"connection closed\n";
							WSACleanup();
							return 1;
						}
						cout<<"failed to recieve file\n";
					}
					else if(strcmp(recv_file,"invalid file name")==0)
					{
						cout<<"invalid file name\n";
						break;
					}
					else
					{
						outfile<<recv_file<<endl;
						cout<<"chunck "<<count<<" recieved\n";
					}
				}
				cout<<"file recieved\n";
			}
			else
			{
				cout<<"failed to save file\n";
			}
			outfile.close();
		}
	}
	
	WSACleanup();
	closesocket(server);
	closesocket(client);
	return 0;
}