Web动态服务器-1
#coding=utf-8
import socket
import sys
from multiprocessing import Process
import re
class WSGIServer(object):
addressFamily = socket.AF_INET
socketType = socket.SOCK_STREAM
requestQueueSize = 5
def __init__(self, serverAddress):
#创建一个tcp套接字
self.listenSocket = socket.socket(self.addressFamily,self.socketType)
#允许重复使用上次的套接字绑定的port
self.listenSocket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
#绑定
self.listenSocket.bind(serverAddress)
#变为被动，并制定队列的长度
self.listenSocket.listen(self.requestQueueSize)
self.servrName = "localhost"
self.serverPort = serverAddress[1]
def serveForever(self):
'循环运行web服务器，等待客户端的链接并为客户端服务'
while True:
#等待新客户端到来
self.clientSocket, client_address = self.listenSocket.accept()
#方法2，多进程服务器，并发服务器于多个客户端
newClientProcess = Process(target = self.handleRequest)
newClientProcess.start()
#因为创建的新进程中，会对这个套接字+1，所以需要在主进程中减去依次，即调用一次close
self.clientSocket.close()
def setApp(self, application):
'设置此WSGI服务器调用的应用程序入口函数'
self.application = application
def handleRequest(self):
'用一个新的进程，为一个客户端进行服务'
self.recvData = self.clientSocket.recv(2014)
requestHeaderLines = self.recvData.splitlines()
for line in requestHeaderLines:
print(line)
httpRequestMethodLine = requestHeaderLines[0]
getFileName = re.match("[^/]+(/[^ ]*)", httpRequestMethodLine).group(1)
print("file name is ===>%s"%getFileName) #for test
if getFileName[-3:] != ".py":
if getFileName == '/':
getFileName = documentRoot + "/index.html"
else:
getFileName = documentRoot + getFileName
print("file name is ===2>%s"%getFileName) #for test
try:
f = open(getFileName)
except IOError:
responseHeaderLines = "HTTP/1.1 404 not found\r\n"
responseHeaderLines += "\r\n"
responseBody = "====sorry ,file not found===="
else:
responseHeaderLines = "HTTP/1.1 200 OK\r\n"
responseHeaderLines += "\r\n"
responseBody = f.read()
f.close()
finally:
response = responseHeaderLines + responseBody
self.clientSocket.send(response)
self.clientSocket.close()
else:
#根据接收到的请求头构造环境变量字典
env = {}
#调用应用的相应方法，完成动态数据的获取
bodyContent = self.application(env, self.startResponse)
#组织数据发送给客户端
self.finishResponse(bodyContent)
def startResponse(self, status, response_headers):
serverHeaders = [
('Date', 'Tue, 31 Mar 2016 10:11:12 GMT'),
('Server', 'WSGIServer 0.2'),
]
self.headers_set = [status, response_headers + serverHeaders]
def finishResponse(self, bodyContent):
try:
status, response_headers = self.headers_set
#response的第一行
response = 'HTTP/1.1 {status}\r\n'.format(status=status)
#response的其他头信息
for header in response_headers:
response += '{0}: {1}\r\n'.format(*header)
#添加一个换行，用来和body进行分开
response += '\r\n'
#添加发送的数据
for data in bodyContent:
response += data
self.clientSocket.send(response)
finally:
self.clientSocket.close()
#设定服务器的端口
serverAddr = (HOST, PORT) = '', 8888
#设置服务器静态资源的路径
documentRoot = './html'
#设置服务器动态资源的路径
pythonRoot = './wsgiPy'
def makeServer(serverAddr, application):
server = WSGIServer(serverAddr)
server.setApp(application)
return server
def main():
if len(sys.argv) < 2:
sys.exit('请按照要求，指定模块名称:应用名称,例如 module:callable')
#获取module:callable
appPath = sys.argv[1]
#根据冒号切割为module和callable
module, application = appPath.split(':')
#添加路径套sys.path
sys.path.insert(0, pythonRoot)
#动态导入module变量中指定的模块
module = __import__(module)
#获取module变量中指定的模块的，application变量指定的属性
application = getattr(module, application)
httpd = makeServer(serverAddr, application)
print('WSGIServer: Serving HTTP on port %d ...\n'%PORT)
httpd.serveForever()
if __name__ == '__main__':
main()
