sending and receiving files using winsock

[Sekkkyyy]

How to implement it properly?

This is what i have so far

Receiver

 else if(command == 'f'){


    char read;
    std::string collector;          //filename
    std::string sizellector;        //filename

    do{                             //get filename

    recv(sock_CONNECTION,&read,1,0);   // for [filename]& 

    if(read !='&')                     //& is delimiter so no need to add
    collector += read;  

    }   while(read != '&');            //end at &



    read =0;//empty
    do{                                 //for [1400000]& which is the size
    recv(sock_CONNECTION,&read,1,0);    //get file type
    if(read !='&')                      //& is delimiter so no need to add
    sizellector += read;                //

    }while(read != '&');                //end


    //collect and complete
    long size = atol(sizellector.c_str());  //convert string to int


    char * buffer = new char[size];         //alocate



    char ptr[1024];                         //buffer
    int var = 0;                    

    while(var <= size){                     //
    recv(sock_CONNECTION,ptr,1024,0);       //receive
    strcat(buffer,ptr);                     //concatenate
    var=var+1024;                           //increase
    }





    std::ofstream outfile (collector,std::ofstream::binary);
    outfile.write (buffer,size);                    //write 

    SetConsoleTextAttribute(hConsole, 2);
    std::cout<<" >Client:has sent a file named "<<collector<<" size is "<<sizellector<<std::endl;   //output
    SetConsoleTextAttribute(hConsole, csbiInfo.wAttributes);


    send(sock_CONNECTION, "File transfer is successful",28 ,NULL);

    delete [] buffer
    outfile.close();

}

then this is my sender:
send(sock,buffer,size,NULL); //size is like 14000000 or higher, would it be possible to send them in 1 go?

Everything on the sender works fine except when sending the buffer itself(file).

Would it be possible to send in one go and let the receiver iterate? I am trying to send file to my tcp server but i can't seem to find the max values for the send and recv. Based from researching, they say that you have to loop until you get all of the bytes.

[kbw]

You never check the return codes of send/recv.

How do you synchronise what the server and client are doing?