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import socket
import struct
from db import search_by_date
import re
import json
def pack_data(data):
encoded = data.encode()
return struct.pack('I', len(encoded)) + encoded
def handle_request(data):
match = re.match(r'(\d+):?(\d+)?:?(\d+)?-(.*)', data)
if match:
*date, msg = match.groups()
return pack_data(json.dumps(search_by_date(*date, msg)))
else:
print('String not matched.')
return pack_data(json.dumps([]))
def get_data(connection):
buffer = b''
while len(buffer) < 4:
data = connection.recv(4 - len(buffer))
if not data:
raise ConnectionError('Connection was closed')
buffer += data
size_packed, buffer = buffer[:4], buffer[4:]
if not size_packed:
raise ConnectionError('Connection was closed')
(size,) = struct.unpack('I', size_packed)
data = connection.recv(size - len(buffer))
return buffer + data
def handle_connection(connection, address):
while True:
try:
data = get_data(connection)
except ConnectionResetError:
print(f'Connection with {address[0]} was unexpectedly closed')
break
except ConnectionError:
print(f'Connection with {address[0]} was ended')
break
except KeyboardInterrupt:
raise KeyboardInterrupt()
else:
if not data:
print(f'Connection with {address[0]} was ended')
break
response = handle_request(data.decode())
connection.sendall(response)
HOST, PORT = ADDR = '0.0.0.0', 6001
sock = socket.socket()
sock.bind(ADDR)
sock.listen(5)
while True:
print('Listening for new connections...')
try:
connection, address = sock.accept()
print(f'Got a connection from {address[0]}')
handle_connection(connection, address)
except KeyboardInterrupt:
print('Stopping server...')
sock.close()
print('Server stopped')
break
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