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"""
The mighty silly webserver written in python for no good reason
"""
import time
import json
import gzip
import socket
import asyncio
import aiofiles
import threading
# path mapping
PATH_MAP = {
"/": {"path": "www/index.html"},
"/index.html": {"path": "www/index.html"},
"/robots.txt": {"path": "www/robots.txt"},
"/favicon.ico": {"path": "www/favicon.ico"},
"/css/styles.css": {"path": "css/styles.css"},
}
def get_response_code(code: int) -> bytes:
match code:
case 200:
return b'200 OK'
case 400:
return b'400 Bad Request'
case 401:
return b'401 Unauthorized'
case 403:
return b'403 Forbidden'
case 404:
return b'404 Not Found'
case 6969:
return b'6969 UwU'
case _: # in any other case return bad request response
return get_response_code(400)
class Request:
"""
Just a request
"""
def __init__(self):
self.type: str = ""
self.path: str = ""
@staticmethod
def create(raw_request: bytes):
"""
Creates self class from raw request
:param raw_request: bytes
:return: self
"""
# new request
request = Request()
# fix type and path
request.type = raw_request[:raw_request.find(b' ')].decode("ascii")
request.path = raw_request[len(request.type)+1:raw_request.find(b' ', len(request.type)+1)].decode("ascii")
# decode headers
for raw_header in raw_request.split(b'\r\n'):
if len(pair := raw_header.decode("ascii").split(":")) == 2:
key, val = pair
val = val.strip()
# set attribute to key value pair
setattr(request, key, val)
# return request
return request
def __str__(self):
return '\n'.join([f"{key}: {val}" for key, val in self.__dict__.items()])
class HTTPServer:
"""
The mighty HTTP server
"""
def __init__(self, *, port: int, packet_size: int = 2048):
self.bind_port: int = port
self.packet_size: int = packet_size
self.socket: socket.socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
self.clients: list[socket.socket] = []
def start(self):
"""
Method to start the web server
"""
# bind and start listening to port
self.socket.bind(('', self.bind_port))
self.socket.listen()
# start the listening thread
threading.Thread(target=self._listen_thread, daemon=True).start()
# keep alive
try:
while True:
# sleep 100 ms, otherwise the while true will 100% one of your cores
time.sleep(0.1)
# shutdown on keyboard interrupt
except KeyboardInterrupt:
self.socket.close()
print("Closed.")
def _listen_thread(self):
"""
Listening for new connections
"""
# run the coroutine
asyncio.run(self._thread_listen_coro())
async def _thread_listen_coro(self):
while True:
# accept new connection, add to client list and start listening to it
client, _ = self.socket.accept()
self.clients.append(client)
await self.client_handle(client)
async def client_handle(self, client: socket.socket):
"""
Handles client's connection
"""
while True:
# receive request from client
raw_request = self._recvall(client)
# decode request
request: Request = Request.create(raw_request)
# handle requests
match request.type:
case "GET":
await self.handle_get_request(client, request)
case _:
pass
self._close_client(client)
break
@staticmethod
async def handle_get_request(client: socket.socket, request: Request):
"""
Handles user's GET request
:param client: client
:param request: client's request
"""
# check if request path is in the PATH_MAP
if request.path in PATH_MAP:
# if it is -> return file from that path
async with aiofiles.open(PATH_MAP[request.path]["path"], "rb") as f:
data = await f.read()
HTTPServer._send(client, 200, data)
@staticmethod
def _send(client: socket.socket, response: int, data: bytes, headers: dict[str, str] = None):
"""
Sends client response code + headers + data
:param client: client
:param response: response code
:param data: data
:param headers: headers to include
"""
if headers is None:
headers = dict()
byte_header = bytearray()
for key, value in headers.items():
byte_header += f"{key}: {value}\r\n".encode("ascii")
client.sendall(
b'HTTP/1.1 ' +
get_response_code(response) +
b'\r\n' +
byte_header + # if empty, we'll just get b'\r\n\r\n'
b'\r\n' +
data
)
def _close_client(self, client: socket.socket):
"""
Closes a client
"""
client.close()
if client in self.clients:
self.clients.remove(client)
def _recvall(self, client: socket.socket) -> bytes:
"""
Receive All (just receives the whole message, instead of 1 packet at a time)
"""
# create message buffer
buffer: bytearray = bytearray()
# start fetching the message
while True:
try:
# fetch packet
message = client.recv(self.packet_size)
except OSError:
break
# that happens when user stops loading the page
if message == b'':
break
# append fetched message to the buffer
buffer += message
# check for EoF
if buffer[-4:] == b'\r\n\r\n':
# return the received message
return buffer
# return empty buffer on error
return b''
def main():
server = HTTPServer(port=13701)
server.start()
if __name__ == '__main__':
main()
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