Иван Солнцев
346f01c9d9
- Rename function fileiter to file_iterator; Fix: - BrokenPipeError for thread; - Log strings;
264 lines
8.6 KiB
Python
264 lines
8.6 KiB
Python
#
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# CatNet Python Server
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#
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# Copyright (C) 2023-2024 John Solntsev
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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#
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import logging
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import config
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from .common import MAX_REQUEST_LINE_SIZE, HandlerType, HTTPMethod
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from .file_read import file_iterator
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from .response import Response
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log = logging.getLogger(__name__)
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class HTTPHandler:
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def __init__(self, conn, addr):
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self.conn = conn
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self.addr = addr
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self.read_fd = conn.makefile("rb")
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self.write_fd = conn.makefile("wb")
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self.http_method = ""
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self.http_address = ""
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self.http_get_request = {}
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self.http_headers = {}
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self.data = b""
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try:
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self.__handle_connection()
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except BrokenPipeError:
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log.info("Conenction pipe broken, close thread")
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def __write_data(self, response):
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for chunk in response:
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self.write_fd.write(chunk)
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self.write_fd.flush()
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def __read_data(self, size=MAX_REQUEST_LINE_SIZE+1):
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return self.read_fd.readline(size)
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def __close(self):
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self.write_fd.close()
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self.read_fd.close()
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self.conn.close()
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def __handle_connection(self):
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"""
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Chain of handle first line of HTTP request
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"""
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raw = self.__read_data()
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if len(raw) > MAX_REQUEST_LINE_SIZE:
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log.debug("Request line too long")
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r = Response(status_code=413, data=b"Request line too long")
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self.__write_data(r)
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self.__close()
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return
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# FIXME data maybe isn't UTF-8 or just binary
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req_line = raw.decode().rstrip("\r\n")
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req_line_splited = req_line.split(" ")
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if len(req_line_splited) != 3:
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if len(req_line_splited) > 3:
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log.debug("Request head too long")
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else:
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log.debug("Request head too small")
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r = Response(status_code=400, data=b"Bad request")
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self.__write_data(r)
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self.__close()
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return
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if req_line_splited[2].startswith("HTTP/"):
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if (req_line_splited[2] == "HTTP/1.0" or
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req_line_splited[2] == "HTTP/1.1"):
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http_method = req_line_splited[0]
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else:
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log.debug("Unsupported HTTP version")
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r = Response(status_code=505, data=b"HTTP Version Not Supported")
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self.__write_data(r)
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self.__close()
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return
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else:
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log.debug("Protocol isn't HTTP version 1.0 or 1.1")
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r = Response(status_code=400, data=b"Bad request")
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self.__write_data(r)
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self.__close()
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return
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if http_method == "GET":
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self.http_method = HTTPMethod.GET
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elif http_method == "POST":
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self.http_method = HTTPMethod.POST
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elif http_method == "PUT":
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self.http_method = HTTPMethod.PUT
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elif http_method == "HEAD":
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self.http_method = HTTPMethod.HEAD
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elif http_method == "DELETE":
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self.http_method = HTTPMethod.DELETE
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elif http_method == "OPTIONS":
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self.http_method = HTTPMethod.OPTIONS
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elif http_method == "TRACE":
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self.http_method = HTTPMethod.TRACE
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elif http_method == "PATCH":
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self.http_method = HTTPMethod.PATCH
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else:
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log.debug("Method not allowed")
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r = Response(status_code=405, data=b"Method not allowed")
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self.__write_data(r)
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self.__close()
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return
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if (self.http_method == HTTPMethod.GET and
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req_line_splited[1].find("?") >= 0):
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addr, get_req = req_line_splited[1].split("?", 1)
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self.http_address = addr
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for param in get_req.split("&"):
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if len(param) == 0:
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continue
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elif param.find("=") >= 0:
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name, val = param.split("=", 1)
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else:
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name, val = (param, "")
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self.http_get_request.update({name: val})
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else:
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self.http_address = req_line_splited[1]
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self.http_get_request = {}
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self.__http_header_handle()
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def __http_header_handle(self):
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"""
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Chain of handle headers in HTTP request
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"""
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while True:
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raw = self.__read_data()
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if len(raw) > MAX_REQUEST_LINE_SIZE:
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log.debug("Request header line too long")
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self.__close()
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return
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if raw == b"":
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log.debug("Client not send data, close connection")
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self.__close()
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return
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if raw == b"\r\n" or raw == b"\n":
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self.__http_data_handle()
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break
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else:
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decoded_data = raw.decode("UTF-8").rstrip("\r\n")
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decoded_data_split = decoded_data.split(":", 1)
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self.http_headers.update(
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{
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decoded_data_split[0]: decoded_data_split[1].strip(" ")
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})
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def __http_data_handle(self):
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"""
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Chain of receive data partitions HTTP request
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"""
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if "Content-Length" in self.http_headers:
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# TODO: if content-length biggest of MAX_REQUEST_LINE_SIZE - partition receive
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log.debug("Request has contain body, try to read")
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log.debug("Check Content-Length value type:")
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if self.http_headers["Content-Length"].isdigit():
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log.debug(" Pass")
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bytes_to_receive = int(self.http_headers["Content-Length"])
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else:
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log.error(" Content-Length is not integer")
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self.__close()
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return
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log.debug("Want to receive %s bytes from client", bytes_to_receive)
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self.data = self.read_fd.read(bytes_to_receive)
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log.debug("Request method: %s", self.http_method)
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log.debug("Requested address: %s", self.http_address)
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log.debug("Request headers: %s", self.http_headers)
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log.debug("Request in GET after ?: %s", self.http_get_request)
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log.debug("Data: %s", self.data)
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self.__send_form_data()
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def __send_form_data(self):
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"""
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Chain of handle, pack & send data to client
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"""
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found = False
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for path in config.urls:
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if self.http_address == path.address:
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if self.http_method in path.methods:
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found = True
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if path.handler_type == HandlerType.STATIC_FILE:
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log.debug("Address associated with static file on path %s", path.link)
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r = Response(data=file_iterator(path.link))
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self.__write_data(r)
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elif path.handler_type == HandlerType.FUNCTION:
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log.debug("Address associated with function")
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func = path.link
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if func.__code__.co_argcount == 0:
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func_return = func()
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elif func.__code__.co_argcount == 1:
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func_return = func(self.http_headers)
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elif func.__code__.co_argcount == 2:
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func_return = func(self.http_headers, self.http_get_request)
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elif func.__code__.co_argcount == 3:
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func_return = func(self.http_headers, self.http_get_request, self.data)
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self.__write_data(func_return)
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else:
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log.warning("Address configured on server, but type not allowed URL type in URLs list")
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r = Response(status_code=404,
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data=b"Address configured on server, but type not allowed URL type in URLs list")
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self.__write_data(r)
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if not found:
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r = Response(status_code=404, data=b"Not found!")
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self.__write_data(r)
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self.__handle_connection()
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