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from socket import socket, AF_INET, SOCK_STREAM, SHUT_RDWR, SOL_SOCKET, SO_REUSEADDR
from time import strftime, gmtime
import logging
import db
from backend import run
from utils import (
parse_cookies, parse_query, parse_headers,
validate_url, add_text_headers, format_cookies,
NOT_FOUND, BAD_REQUEST
)
from templater import render_template
from config import *
logging.basicConfig(filename=db.get_config_entry('log_path'), level=logging.INFO)
def log_requests(func):
def wrapper(*args, **kwargs):
address = kwargs['address'] if 'address' in kwargs else args[0]
request = kwargs['request'] if 'request' in kwargs else args[1]
response = func(*args, **kwargs)
status = response.split('\n').pop(0).split()[1]
if not db.get_config_entry('short_log', False):
# Формируем строку заголовков для вывода
header_pairs = []
for header, value in request['headers'].items():
if header == 'Cookie':
value = format_cookies(value)
header_pairs.append(f'{header}: {value}')
# В логе желательно не использовать переводы строк, когда они не предусмотрены, поэтому
# \r\n заменяем на <CRLF>, чтобы мы могли понимать где в строке должны были находиться переводы строк
headers_line = '<CRLF>'.join(header_pairs)
# Формируем строку тела запроса для вывода
query_pairs = []
for key, value in request['query'].items():
query_pairs.append(f'{key}={value}')
query_line = '&'.join(query_pairs)
to_logger = f'Headers: {headers_line} | Query: {query_line}'
else:
to_logger = f'Cookies: {format_cookies(request["cookies"])} '
log_line = (
f'{address[0]}: {strftime("[%d %b %Y %H:%M:%S]", gmtime())} '
f'"{request["method"]} {request["url"]} {request["http_ver"]}"'
f' | {to_logger} | '
f'Status: {status}'
)
print(log_line)
logging.info(log_line)
return response
return wrapper
@log_requests
def process_request(address, request: dict):
if validate_url(request['url']):
response = run(request)
else:
response = add_text_headers(NOT_FOUND, '404 NOT FOUND')
return response
def parse_request(connection):
buffer = b''
request = b''
while not request.endswith(b'\r\n\r\n'):
data = connection.recv(1024).split(b'\r\n\r\n')
if len(data) == 1:
if not data[0]:
return None
request += data[0]
else:
request += data[0] + b'\r\n\r\n'
buffer += data[1]
method, url, http_ver, headers = parse_headers(request.strip().decode())
try:
cookies = parse_cookies(headers['Cookie'])
except (ValueError, KeyError):
cookies = {}
if 'Content-Type' in headers and headers['Content-Type'] == 'application/x-www-form-urlencoded':
chunk = db.get_config_entry('chunk')
length = int(headers['Content-Length']) - len(buffer)
while length > 0:
if length < chunk:
data = connection.recv(length)
length = 0
else:
data = connection.recv(chunk)
length -= chunk
buffer += data[0]
query = parse_query(buffer.strip().decode()) if buffer else {}
return {
'method': method, 'url': url,
'http_ver': http_ver, 'headers': headers,
'query': query, 'cookies': cookies
}
def get_color():
color = db.get_cookie('bg_color', 'white')
if color not in ['green', 'white']:
color = 'white'
return color
def handle_connection(connection, address):
try:
request = parse_request(connection)
except ValueError as e:
response = add_text_headers(BAD_REQUEST, render_template(
TEXT_TEMPLATE_NAME, color=get_color(),
text=BAD_REQUEST + ('<br>' + str(e) if db.get_config_entry('show_errors') else '')
))
connection.sendall(response.encode())
return
if request is None:
return
response = process_request(address, request)
connection.sendall(response.encode())
def main():
host = db.get_config_entry('host')
port = db.get_config_entry('port')
sock = socket(AF_INET, SOCK_STREAM)
sock.setsockopt(SOL_SOCKET, SO_REUSEADDR, 1)
sock.bind((host, port))
sock.listen(5)
print(f'* Server started on http://{host}:{port}/')
print('* Listening to new connections...')
while True:
try:
connection, address = sock.accept()
handle_connection(connection, address)
connection.shutdown(SHUT_RDWR)
connection.close()
del connection
except (KeyboardInterrupt, ConnectionError):
print('Stopping server...')
try:
connection.shutdown(SHUT_RDWR)
connection.close()
except UnboundLocalError:
# Если переменная connection еще не создана, то нам не нужно закрывать
# соединение, а значит можно игнорировать это исключение.
pass
sock.shutdown(SHUT_RDWR)
sock.close()
print('Server stopped')
break
if __name__ == '__main__':
main()
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