def read_config(config_path):
default_config = {
"address": '0.0.0.0',
"queue": 8,
"port": 80,
"datasize": 1024,
"cpu_limit": psutil.cpu_count(),
"document_root": "/server/"
}
file_existed = os.path.exists(config_path)
if not file_existed:
raise ValueError(f"Missed config on {config_path}")
config_raw, error = open_io(config_path)
if error:
raise ValueError(f"Read file error: {config_path}")
config_values = config_raw.decode("utf-8").split('\n')
for values in config_values:
if values:
key, value = re.search(r'\S* \S*', values).group(0).split(' ')
default_config.update({key: value})
default_config["binding"] = (default_config["address"],
default_config["port"])
default_config["cpu_limit"] = int(default_config["cpu_limit"])
logger.info(f"Config: {default_config}")
return default_config
def server_init(self):
self.socket_initialize()
for worker in range(self.cpu_number):
pid = os.fork()
if pid > 0:
self.forking_workers.append(pid)
elif pid == 0:
logger.info(f'Create new worker with pid: {os.getpid()}')
while True:
client_socket, client_address = self.socket.accept()
raw_request = client_socket.recv(self.size)
if raw_request.strip() == 0:
client_socket.close()
continue
request = http_handlers.request_handler(raw_request)
if not request.validated:
response = self.answers["FORBIDDEN"]
else:
response = self.handle_request(request)
client_socket.send(response)
client_socket.close()
else:
logger.info("Cant fork anymore")
self.socket.close()
for worker_pid in self.forking_workers:
os.waitpid(worker_pid, 0)
def socket_initialize(self):
server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
server_socket.bind(self.binding)
server_socket.listen(self.queue)
self.socket = server_socket
logger.info(f"""Binding on {self.binding} with process count {self.cpu_number} with filepath {self.root}""")
def file_handler(self, filepath):
content_type = None
content_length = 0
data, error = open_io(filepath)
if error:
logger.info(f"Error in reading file with filename:{filepath}") # Raise some exception?
else:
content_length = len(data)
content_type = self.content_type(filepath)
return data, content_length, content_type
def request_handler(input_request):
method, path = None, None
logger.info(f"Input raw request {input_request} \n")
request_body = input_request.decode('utf-8')
request_by_string = request_body.split(" ")
validate = True if len(request_by_string) >= 3 else False # Minimum length ( head example )
if validate:
method = request_by_string[0]
path = unquote(request_by_string[1].split('?')[0])
processing_request = Request(input_request.decode('utf-8'),
method,
validate,
path)
return processing_request
def handle_request(self, request):
filepath = os.path.normpath(self.root + request.path)
logger.info(f"Filepath {filepath}")
# Prefix check
if os.path.commonprefix([self.root, filepath]) != self.root:
logger.info("Status: 403")
return self.answers["FORBIDDEN"]
if request.method not in ("GET", "HEAD"):
logger.info("Status: 405")
return self.answers["NOT_ALLOWED"]
elif not os.path.exists(filepath):
logger.info("Status: 404")
return self.answers["NOT_FOUND"]
# Check dir path
if os.path.isdir(filepath):
filepath += '/index.html'
if not os.path.exists(filepath):
logger.info("Status: 403")
return self.answers["FORBIDDEN"]
if not os.path.isfile(filepath):
logger.info("Status: 403")
return self.answers["FORBIDDEN"]
data, content_length, content_type = self.file_handler(filepath)
if content_type is None:
logger.info("Status: 404")
return self.answers["NOT_FOUND"]
if request.method == 'HEAD':
logger.info("Status: 200")
return http_handlers.response_handler(http_version=HTTP_VERSION,
status_code=HTTPStatus.OK,
content_len=content_length,
content_type=content_type)
logger.info("Status: 200")
return http_handlers.response_handler(http_version=HTTP_VERSION,
status_code=HTTPStatus.OK,
content_len=content_length,
content_type=content_type,
data=data)
