Alap python socket programok

cli.py

#Kliens, csatlakozik a szerverhez, küld egy üzenetet és 
#fogadja a szerver válaszát amit kiír a képernyőre

import socket

sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.connect(("127.0.0.1", 5555))

sock.send(b"Hello!\n")
reply = sock.recv(1024)

print(reply)
sock.close()

file_send.py

import socket

sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.connect(("127.0.0.1", 5555))

def open_bin(filename):
    with open(filename, "rb") as f:
        while True:
            buff = f.read(1024)
            if not buff:
                return
            yield buff

prev = 0
md5 = hashlib.md5()
for buff in open_bin("data.bin"):
    prev = zlib.crc32(buff, prev)
    md5.update(buff)

    sock.send(buff)
else:
    print("CRC32: ", hex(prev))
    print("MD5: ", md5.hexdigest())

multi.py

#Chat broadcast szerver: fogadja a kiensek csatlakozását és az üzeneteiket
#továbbküldi a csatlakozott klienseknek

import socket
import select

socks = []

srv = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
srv.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
srv.bind(("0.0.0.0", 5555))
srv.listen()
socks.append(srv)

while True:
    readable, writeable, err = select.select(socks, [], [], 0)

    for s in readable:
        if s == srv:
            client, client_address = srv.accept()
            print("New client from", client_address)
            socks.append(client)
        else:
            msg = s.recv(1024)
            if msg: #[sock.send(msg) for sock in socks if sock != s and sock != srv]
                for sock in socks:
                    if sock != s and sock != srv:
                        sock.send(msg)
            else:
                socks.remove(s)
                s.close()

srv.py

#Szerver, bejövő kapcsolat esetén vár egy üzenetre,
#majd erre az üzenetre küld egy választ

import socket

srv = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
srv.bind(("0.0.0.0", 5555))
srv.listen()
client, client_address = srv.accept()

message = client.recv(1024)
print(message)
client.send(b"Hello client!\n")

client.close()
srv.close()

struct_cli.py

import socket
import struct

sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.connect(("127.0.0.1", 5555))

msg = (2019, b"HELLO", 0.5)
msg_packed = struct.Struct("I 5s f").pack(*msg)

sock.sendall(msg_packed)

sock.close()

struct_srv.py

import socket
import struct

srv = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
srv.bind(("0.0.0.0", 5555))
srv.listen()
client, client_address = srv.accept()

msg_packed = client.recv(1024)
msg = struct.Struct("I 5s f").unpack(msg_packed)
print(msg)

client.close()
srv.close()

tcp_multi_proxy.py

import select
import socket
import sys

socks = []
sockmap = {}

srv = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
srv.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
srv.bind(('0.0.0.0', 5555))
srv.listen()
socks.append(srv)

while True:
    readable, _, _ = select.select(socks, [], [], 0)
    for s in readable:
        if s == srv:
            cli, _ = srv.accept()
            remote = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
            remote.connect((sys.argv[1], int(sys.argv[2])))
            sockmap[cli] = remote
            sockmap[remote] = cli
            socks.append(cli)
            socks.append(remote)
        else:
            msg = s.recv(4096)
            if not msg:
                s.close()
                sockmap[s].close()
                socks.remove(s)
                socks.remove(sockmap[s])
            else:
                sockmap[s].sendall(msg)

srv.close()

tcp_proxy.py

import socket
import select
import sys

#python3 tcp_proxy.py 80 ik.elte.hu 80

srv = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
srv.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
srv.bind(("0.0.0.0", int(sys.argv[1])))
srv.listen()
client, client_address = srv.accept()

remote = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
remote.connect((sys.argv[2], int(sys.argv[3])))

while True:
    readable, _, _ = select.select((client, remote), [], [], 0)
    for s in readable:
        msg = s.recv(4096)
        if msg:
            if s == client:
                print("from client: *************")
                remote.send(msg)
            else:
                print("from remote: *************")
                client.send(msg)

            print(msg)

client.close()
remote.close()
srv.close()