下面給大家介紹python實現簡易版的web服務器，具體內容詳情大家通過本文學習吧！

1、請自行了解HTTP協議

2、創建Socket服務，監聽指定IP和端口

3、以阻塞方式等待客戶端連接

4、讀取客戶端請求數據并進行解析

5、準備服務器運行上下文

6、處理客戶端請求數據

7、根據用戶請求路徑讀取文件

8、返回響應結果給客戶端

9、程序入口

10、目錄結構

11、運行

python wsgiserver.py app:run

12、源碼

a.wsgiserver.py文件

#encoding:utf-8

import socket

import StringIO

import sys

import logging

from datetime import datetime

logger = logging.getLogger(__name__)

class WSGIServer(object):

address_family = socket.AF_INET

socket_type = socket.SOCK_STREAM

request_queue_size = 30

recv_size = 1024

def __init__(self, server_address):

self._listen_socket = _listen_socket = socket.socket(self.address_family,

self.socket_type) _listen_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR,1) _listen_socket.bind(server_address)

_listen_socket.listen(self.request_queue_size)

_host, _port = _listen_socket.getsockname()

self._server_name = socket.getfqdn(_host)

self._server_port = _port

self._headers_set = []

self._application = None

self._client = None

self._request_data = None

self._request_method = None

self._path = None

self._request_version = None

self._start_response = None

def set_application(self, application):

self._application = application

def server_forever(self):

_listen_socket = self._listen_socket

logger.info('listen on %s:%s', self._server_name, self._server_port) while 1:

try:

self._client, _addr = _listen_socket.accept()

self._handle_request(_addr)

except KeyboardInterrupt as e:

logger.info('interrupt')

break

except BaseException as e:

logger.error(e)

def _handle_request(self, client_addr):

self._request_data = _request_data = self._client.recv(self.recv_size)

self._parse_request_data(_request_data)

_env = self._get_environment(client_addr)

_result = self._application(_env, self.start_response)

self._finish_response(_result)

def _parse_request_data(self, request_data):

_request_line = str(request_data.splitlines()[0]).rstrip('\r\n')

(self._request_method, self._path, self._request_version) = _request_line.split()

def _get_environment(self, client_addr):

_env = {}

_env['wsgi.version'] = (1, 0)

_env['wsgi.url_scheme'] = 'http'

_env['wsgi.input'] = StringIO.StringIO(self._request_data) _env['wsgi.errors'] = sys.stderr

_env['wsgi.multithread'] = False

_env['wsgi.multiprocess'] = False

_env['wsgi.run_once'] = False

_env['REQUEST_METHOD'] = self._request_method.upper()

_env['PATH_INFO'] = self._path

_env['SERVER_NAME'] = self._server_name

_env['SERVER_PORT'] = self._server_port

_env['HTTP_CLIENT_IP'] = client_addr[0]

logger.info('%s %s %s %s', _env['HTTP_CLIENT_IP'], datetime.now().strftime('%Y-%m-%d %H:%M:%S'), _env['REQUEST_METHOD'], _env['PATH_INFO'])

return _env

def start_response(self, status, response_headers, exc_info=None): _server_headers = [

('Date', 'Sun, 7 Jun 2015 23:07:04 GMT'),

('Server', 'WSGIServer 0.1')

]

self._headers_set = [status, response_headers + _server_headers]

def _finish_response(self, result):

_status, _response_headers = self._headers_set

_response = 'HTTP/1.1 {status}\r\n'.format(status=_status) for _header in _response_headers:

_response += '{0}:{1}\r\n'.format(*_header)

_response += '\r\n'

for _data in result:

_response += _data

self._client.sendall(_response)

self._client.close()

def make_server(server_address, application):

server = WSGIServer(server_address)

server.set_application(application)

return server

if __name__ == '__main__':

logging.basicConfig(level=logging.DEBUG)

server_addr= ('0.0.0.0', 43002)

app_path = sys.argv[1]

module, application = app_path.split(':')

module = __import__(module)

application = getattr(module, application)

httpd = make_server(server_addr, application)

httpd.server_forever()

b.app.py文件

#encoding:utf-8

import os

class PageNotFoundException(BaseException):

pass

def render(filename, dirname='html'):

_path = os.path.join(dirname, filename)

if os.path.exists(_path):

with open(_path, 'rb') as handler:

return handler.read()

raise PageNotFoundException('file not found:%s' % _path)

def run(env, start_response):

_path = env.get('PATH_INFO')

response = ''

try:

_path = 'index.html' if _path == '/' else _path[1:]

if _path.endswith('.css'):

start_response('200 OK', [('Content-Type', 'text/css')])

elif _path.endswith('.js'):

start_response('200 OK', [('Content-Type', 'text/javascript')]

elif _path.endswith('.html'):

start_response('200 OK', [('Content-Type', 'text/html')])

else:

start_response('200 OK', [('Content-Type', 'text/plain'), ('Content-Disposition', 'attachment; filename=%s' % os.path.basename(_path))])

response = render(_path)

except PageNotFoundException as e:

response = render('404.html')

return [response, '\r\n']

總結

以上所述是小編給大家介紹的Python實現簡易版的Web服務器，希望對大家有所幫助，如果大家有任何疑問請給我留言，小編會及時回復大家的。在此也非常感謝大家對腳本之家網站的支持！

總結

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