Using Socket for File Transfer

[Naterlarsen]

Good day all. I am more on the experienced side of Python and have written some 
successful file transfer applications (in python). However, I am struggling to 
find sufficient information or examples on how to do the same in nim. I have 
taken my code that I had done in Python and have attempted to translate it into 
nim. But not as easy as I hoped it would be. And when looking for online 
information on how to do, very little is found to assist with this. Please help 
me with this. Need to understand better on how to implement this.

Here is my translated python to nim code. Both client and server.
    
    
    Server -
    
    import net, os, strutils
    
    const
      BUFFER_SIZE = 4096
    
    let server: Socket = newSocket()
    server.bind(Port(5555))
    server.listen(1)
    stdout.writeLine("Server: waiting for client connection")
    
    while true:
        let (client_socket, _) = server.accept()
        stdout.writeLine("Server: client connected")
        
        while true:
            let data = client_socket.recv(BUFFER_SIZE)
            let filename = data.split("\r\n")[0]
            let filepath = data.split("\r\n")[1]
            if filename == "exit":
                client_socket.close()
                break
            
            if not fileExists(filepath):
                let filesize_bytes = -1.int64.pack()
                client_socket.send(filesize_bytes)
                continue
            
            let filesize_bytes = fileSize(filepath).int64.pack()
            client_socket.send(filesize_bytes)
            let file = open(filepath, fmRead)
            
            while true:
                let bytes_read = file.read(BUFFER_SIZE)
                if not bytes_read:
                    break
                client_socket.sendall(bytes_read)
            
            file.close()
    
    
    
    
    Client -
    
    import net, os, strutils
    
    let client: Socket = newSocket()
    client.connect("127.0.0.1", Port(5555))
    stdout.writeLine("Client: connected to server on address 127.0.0.1:5555")
    
    while true:
        stdout.write("> ")
        let filepath: string = stdin.readLine()
        if filepath == "exit":
            break
        
        let filename = filepath.split("/")[-1]
        let data = filename & "\r\n" & filepath
        client.send(data)
        
        let filesize_bytes = client.recv(8)
        let filesize = filesize_bytes.unpackInt64()
        if filesize == -1:
            stdout.writeLine("Server: file not found")
            continue
        
        let bytes_received = 0
        let download_folder = "downloads"
        if not existsDir(download_folder):
            createDir(download_folder)
        let file = open(download_folder & "/" & filename, fmReadWrite)
        
        while bytes_received < filesize:
            let bytes_read = client.recv(BUFFER_SIZE)
            if not bytes_read:
                break
            file.write(bytes_read)
            bytes_received += len(bytes_read)
        
        file.close()
        stdout.writeLine("Server: file downloaded successfully")
    
    client.close()
    
    
    Run