Question

我正在尝试构建一个简单的多线程服务器，当通过浏览器查询时，会回复所请求的html页面或404页面。

这是我的代码：

from socket import *
import thread

def handler(connectionSocket,addr):
    try:
        message = connectionSocket.recv(2048) 
        filename = message.split()[1] 
        f = open(filename[1:], 'r')
        outputdata = f.read()

        #Send one HTTP header line into socket
        connectionSocket.send("\nHTTP/1.0 200 OK\n\n")

        #Send the content of the requested file to the client
        connectionSocket.send(outputdata)

        #Close client socket
        f.close()
        connectionSocket.close()
    except IOError:
        #Send response message for file not found
        print "404 Not Found"

        #Send over 404 page
        f = open("404.php",'r')
        outputdata = f.read()
        connectionSocket.send("\nHTTP/1.0 404 Not Found\n\n")
        connectionSocket.send(outputdata)

        #Close client socket
        f.close()
        connectionSocket.close()


def main():
    #Prepare a sever socket
    serverPort = 6789
    serverSocket = socket(AF_INET, SOCK_STREAM)
    serverSocket.bind(('',serverPort))
    serverSocket.listen(1)
    print "Starting server on port: " + str(serverPort) + ". User <CTRL-C> to stop"

    while True:
        #Establish the connection
        print 'Ready to serve...'
        connectionSocket, addr = serverSocket.accept()
        print '...connected from:', addr
        thread.start_new_thread(handler,(connectionSocket,addr))

    serverSocket.close()

if __name__ == '__main__':
    main()

当我查询helloworld.html时，我收到了网页，但服务器似乎连接了4次，如下所示。页面显示后，它会一直保持“准备服务......”＃34;几分钟然后得到错误。

Starting server on port: 6789. User <CTRL-C> to stop
Ready to serve...
...connected from: ('127.0.0.1', 61382)
Ready to serve...
...connected from: ('127.0.0.1', 61386)
Ready to serve...
...connected from: ('127.0.0.1', 61387)
Ready to serve...
...connected from: ('127.0.0.1', 61388)
Ready to serve...
Unhandled exception in thread started by <function handler at 0x10051a410>
Traceback (most recent call last):
 File "web_server2.py", line 13, in handler
    filename = message.split()[1]
IndexError: list index out of rangeUnhandled exception in thread started by <function handler at 0x10051a410>
Traceback (most recent call last):
  File "web_server2.py", line 13, in handler
    filename = message.split()[1]
IndexError: list index out of range

Unhandled exception in thread started by <function handler at 0x10051a410>
Traceback (most recent call last):
  File "web_server2.py", line 13, in handler
    filename = message.split()[1]
IndexError: list index out of range
^CTraceback (most recent call last):
  File "web_server2.py", line 58, in <module>
    main()
  File "web_server2.py", line 51, in main
    connectionSocket, addr = serverSocket.accept()
  File "//anaconda/lib/python2.7/socket.py", line 206, in accept
    sock, addr = self._sock.accept()

从错误回溯中，似乎程序连接并发送页面，然后认为它再次连接，但是当没有发送查询时，数组为空并且以一个边界错误退出。

同样，当我查询不在那里的页面并收到我的404页面时：

Starting server on port: 6789. User <CTRL-C> to stop
Ready to serve...
...connected from: ('127.0.0.1', 55032)
Ready to serve...
...connected from: ('127.0.0.1', 55033)
Ready to serve...
404 Not Found
...connected from: ('127.0.0.1', 55059)
Ready to serve...
...connected from: ('127.0.0.1', 55061)
Ready to serve...
...connected from: ('127.0.0.1', 55063)
Ready to serve...
...connected from: ('127.0.0.1', 55065)
Ready to serve...
...connected from: ('127.0.0.1', 55067)
Ready to serve...
...connected from: ('127.0.0.1', 55069)
Ready to serve...
...connected from: ('127.0.0.1', 55071)
Ready to serve...
...connected from: ('127.0.0.1', 55073)
Ready to serve...
...connected from: ('127.0.0.1', 55075)
Ready to serve...
...connected from: ('127.0.0.1', 55077)
Ready to serve...
...connected from: ('127.0.0.1', 55079)
Ready to serve...
...connected from: ('127.0.0.1', 55093)
Ready to serve...
404 Not Found
...connected from: ('127.0.0.1', 55095)
Ready to serve...
404 Not Found

它连接多次，但只通过ioexception部分3次，因为只有3次＆＃34; 404 Not Found＆＃34;的打印。但是现在，服务器没有像helloworld.html页面那样退出，它完全保持原样，当再次查询不存在的页面时，我得到另一个404.但是当查询helloworld.html时，它显示它然后退出与上面相同的错误。

任何寻找bug的帮助都会很棒。我可以通过测试来判断它似乎与我处理i / o的方式有关，但我不确定这似乎是什么问题。这是我的第一个服务器程序，并希望了解更多相关信息。谢谢！

Python多线程服务器 - 客户端服务器通信问题

0 个答案: