oorot.blogg.se - Multi chat client

MULTI CHAT CLIENT FULL
MULTI CHAT CLIENT CODE

The client has to actually listen for server message and user input at the same time. If the user types in a message then send it to the server.

Listen for incoming messages from the server.

The chat client does the following 2 things : It connects to a remote server, sends messages and receives messages. The client is based on the telnet program in python.

MULTI CHAT CLIENT CODE

Now lets code the chat client that will connect to the above chat server. Print "Client (%s, %s) is offline" % addrĬhat server started on port 5000 Chat client # a "Connection reset by peer" exception will be thrownīroadcast_data(sock, "Client (%s, %s) is offline" % addr) #In Windows, sometimes when a TCP program closes abruptly, # Handle the case in which there is a new connection recieved through server_socketīroadcast_data(sockfd, " entered room\n" % addr) Print "Chat server started on port " + str(PORT) # Add server socket to the list of readable connections Server_tsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) Server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM) RECV_BUFFER = 4096 # Advisable to keep it as an exponent of 2 # List to keep track of socket descriptors #Function to broadcast chat messages to all connected clients

MULTI CHAT CLIENT FULL

Here is the full code of the chat client. Rest of the program is quite self explanatory. If the broadcast function fails to send message to any of the client, the client is assumed to be disconnected and the connection is closed and the socket is removed from the connection list. # broken socket connection may be, chat client pressed ctrl+c for example If socket != server_socket and socket != sock : #Do not send the message to master socket and the client who has send us the message The following function broadcasts the message to all chat clients. If any of the client socket is readable, the server would read the message, and broadcast it back to all clients except the one who send the message. So if the master socket is readable, the server would accept the new connection. When the select function returns, the read_sockets will be an array consisting of all socket descriptors that are readable. Read_sockets,write_sockets,error_sockets = lect(CONNECTION_LIST,) # Get the list sockets which are ready to be read through select If any of the client socket is readable then it means that one of the chat client has send a message. The select function monitors all the client sockets and the master socket for readable activity. The server handles multiple chat clients with select based multiplexing. You can change the port number if you want. The chat client must connect to this same port. It server opens up port 5000 to listen for incoming connections.

Read incoming messages from each client and broadcast them to all other connected clients.

Accept multiple incoming connections for client.

The chat server does the following things First is the server and the other is the chat client. The construction is as simple as the theory. Every message is broadcasted to every connected chat user. So this means that multiple users can connect to the chat server and send their messages. The chat application we are going to make will be more like a chat room, rather than a peer to peer chat. In this post we are going to write a very simple chat application in python that is powered by sockets.

In our previous article on socket programming in python we learned about the basics of creating a socket server and client in python.