Question

我的服务器向客户端发送文件时遇到了非常不寻常的行为（从它们接收没有问题）。更糟糕的是，它在看似随机的时候挂断了。有时传输100个文件，有时只传输1-3个文件。

它挂起的地方：在while循环中的“l = s.recv（512）”的客户端代码定义中的receiveFile

编辑：一些重要信息。当我在服务器上运行客户端代码时，它不会挂断！

很明显，客户端正在等待某种输入，服务器不再提供数据了？但为什么服务器功能不再提供数据呢？我显然错过了一些明显的东西？为什么它会随机挂断？

我正在尝试将4000个相对较小的文件从我的服务器传输到客户端。文件大小范围从981B到37.0kB。

我已尝试更改发送/接收的字节数，但没有任何影响。

我知道这是一个很高的命令，但任何帮助的尝试都非常感激（现在已经工作了一个星期但没有用）

服务器代码：

import socket
import os
import sys
import time
import thread
import easygui
import os.path
import MySQLdb
from socket import error as socket_error
from random import randint


serverIP = "192.168.1.65"

class fileConnection(object):
    def connect(self, clientsocket):
        sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
        connected = False
        while not connected:
            try:
                port = randint(1024,2024)
                sock.bind((serverIP,port))
                connected = True
            except socket_error:
                None
        return sock

    def receiveFile(self, fileName, clientsocket):
        s = self.connect(clientsocket)
        s.listen(5)
        clientsocket.send(str(s.getsockname()[1]).ljust(5)[0:5])
        c, addr = s.accept()

        fout = open(fileName,'wb')
        l = c.recv(512)
        while (l):
            fout.write(l)
            l = c.recv(512)
        fout.close()

        s.shutdown(2) #has to be 2
        #s.close() #is this causing problems?

    def sendFile(self, fileName, clientsocket):
        s = self.connect(clientsocket)
        s.listen(5)
        clientsocket.send(str(s.getsockname()[1]).ljust(5)[0:5])
        c, addr = s.accept()

        fin = open(fileName,'rb')       
        l = fin.read(512)
        while (l):
            c.send(l)
            l = fin.read(512)
        fin.close()

        s.shutdown(1) #works for 1 and 2 AND without. Maybe doesnt need this...
        #s.close()


def client_thread(clientsocket, file_names):
    file_name = file_names.pop()
    clientsocket.send(file_name.ljust(64)[0:64])
    connect = fileConnection()
    connect.sendFile("./folder/" + file_name, clientsocket)




##################################################
#puts filenames in fileNames
##################################################
file_names = []
for (dirpath, dirnames, filenames) in os.walk("./folder/"):
    file_names.extend(filenames)
    break
##################################################

serversocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
serversocket.bind((serverIP, 9999))
serversocket.listen(5)

print "Listening for jobs to send...\n"


while True:
    (clientsocket, address) = serversocket.accept()
    ct = thread.start_new_thread(client_thread,(clientsocket, file_names,))

客户代码：

import easygui
import os.path
import socket
import sys
import os
import time
import errno
from socket import error as socket_error
import tarfile
import shutil
from timeout import timeout

serverIP = "192.168.1.65"

class fileConnection(object):
    def connect(self, client_socket):
        port = int(client_socket.recv(5).strip())
        sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        connected = False
        while not connected:
            try:
                sock.connect((serverIP,port))
                connected = True
            except socket_error:
                print "Couldn't connect to server. Trying again in 5 seconds"
                time.sleep(5)
        print port
        return sock

    def receiveFile(self, fileName, client_socket):     
        s = self.connect(client_socket)
        fout = open(fileName,'wb')
        l = s.recv(512)
        while (l):
            fout.write(l)
            l = s.recv(512)
        fout.close()
        s.close()
        #time.sleep(0.25)
        return True

    def sendFile(self, fileName, client_socket):
        s = self.connect(client_socket)
        fin = open(fileName,'rb')
        l = fin.read(512)
        while (l):
            s.send(l)
            l = fin.read(512)
        fin.close()
        s.close()
        #time.sleep(0.25)
        return True


def test_receive_file(client_socket):
    file_name = client_socket.recv(64).strip()
    print file_name
    connect = fileConnection()
    connect.receiveFile("./folder/" + file_name, client_socket)
    return file_name

while True:
    #time.sleep(.1)

    client_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    client_socket.connect((serverIP, 9999))
    file_name = test_receive_file(client_socket)
    client_socket.close()

通过python端口发送多个文件随机挂起

0 个答案: