Иван Солнцев
9155cb17ed
Allow handle client requests with HTTP body for custom functions. - Rewrited "path" function to class; - Simple check clien request of method allowed; - Use "Enumirations" for handler types, HTTP methods;
249 lines
8 KiB
Python
249 lines
8 KiB
Python
import threading
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import socket
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import logging
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import os
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import config
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from .file_read import fileiter
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from .response import Response
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from .common import HandlerType, HTTPMethod
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MAX_REQLINE = 64 * 1024
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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_fb = conn.makefile("rb")
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self.write_fb = 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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self.pre_handle_connection()
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def pre_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_fb.readline(MAX_REQLINE + 1)
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if len(raw) > MAX_REQLINE:
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log.debug("Request line too long")
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self.conn.send(b"")
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self.conn.close()
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return
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req_line = raw.decode().rstrip("\r\n")
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# method, address, protocol = req_line_splited
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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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self.conn.send(b"")
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self.conn.close()
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return
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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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self.conn.send(b"")
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self.conn.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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self.conn.send(b"")
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self.conn.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_fb.readline(MAX_REQLINE + 1)
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if len(raw) > MAX_REQLINE:
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log.debug("Request header line too long")
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self.conn.send(b"")
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self.conn.close()
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return
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if raw == b"":
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self.conn.send(b"")
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self.conn.close()
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return
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if raw == b"\r\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_REQLINE - 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.conn.send(b"")
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self.conn.close()
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return
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log.debug("Want to receive {} bytes from client".format(bytes_to_receive))
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self.data = self.read_fb.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 {}".format(path.link))
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r = Response(data=fileiter(path.link))
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for i in r:
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self.write_fb.write(i)
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self.write_fb.flush()
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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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for i in func_return:
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self.write_fb.write(i)
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self.write_fb.flush()
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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, data=b"Address configured on server, but type not allowed URL type in URLs list")
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for i in r:
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self.write_fb.write(i)
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self.write_fb.flush()
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if not found:
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r = Response(status_code=404, data=b"Not found!")
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for i in r:
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self.write_fb.write(i)
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self.write_fb.flush()
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self.write_fb.close()
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self.read_fb.close()
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self.conn.close()
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def start_http_server():
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try:
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with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as main_server_socket:
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main_server_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, True)
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main_server_socket.bind(("0.0.0.0", config.SETUP["server"]["port"]))
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main_server_socket.listen()
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while True:
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conn, addr = main_server_socket.accept()
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log.info("Accept connection from %s", addr[0])
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thr_serv_conn = threading.Thread(target=HTTPHandler, args=(conn, addr,))
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thr_serv_conn.run()
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except KeyboardInterrupt:
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log.info("Server get keyboard interrupt. Initialize server to stop")
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log.info("==================== End of log ====================")
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