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from socket import socket, AF_INET, SOCK_STREAM, SHUT_RDWR
from time import strftime, gmtime
from backend import run
from utils import validate_url, parse_cookies, parse_query, parse_headers, add_headers, NOT_FOUND, BAD_REQUEST
from templater import render_template
from config import *
import db
def log_requests(func):
def wrapper(*args, **kwargs):
address = kwargs['address'] if 'address' in kwargs else args[0]
method = kwargs['method'] if 'method' in kwargs else args[1]
url = kwargs['url'] if 'url' in kwargs else args[2]
http_ver = kwargs['http_ver'] if 'http_ver' in kwargs else args[3]
response = func(*args, **kwargs)
status = response.split('\n').pop(0).split()[1]
log_line = f'{address[0]}: {strftime("[%d %b %Y %H:%M:%S]", gmtime())} "{method} {url} {http_ver}" Status: {status}'
print(log_line)
return response
return wrapper
@log_requests
def process_request(address, method, url, http_ver, headers: dict, query):
if validate_url(url):
try:
cookies = parse_cookies(headers['Cookie'])
except (ValueError, KeyError):
cookies = {}
response = run(method, url, cookies, query)
else:
response = add_headers(NOT_FOUND, '404 NOT FOUND')
return response
def get_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())
if 'Content-Type' in headers and headers['Content-Type'] == 'application/x-www-form-urlencoded':
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, url, http_ver, headers, query
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 = get_request(connection)
except ValueError as e:
response = add_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
method, url, http_ver, headers, query = request
response = process_request(address, method, url, http_ver, headers, query)
connection.sendall(response.encode())
def main(host, port):
sock = socket(AF_INET, SOCK_STREAM)
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:
pass
sock.shutdown(SHUT_RDWR)
sock.close()
print('Server stopped')
break
if __name__ == '__main__':
HOST, PORT = ADDR = '0.0.0.0', 4001
main(HOST, PORT)
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