Python - 通过套接字发送文件

Question

我一直在尝试实现一个小型 SERVER - CLIENT 应用程序，但遇到了错误:

socket.error: [Errno 10057] A request to send or receive data was disallowed because the socket is not connected and (when sending on a datagram socket using a sendto call) no address was supplied

服务器:

class Server:
    gate = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    host = socket.gethostname()
    port = 0
    file = ''

    def __init__(self, port):
        self.port = port
        self.gate.bind((self.host, self.port))  
        self.listen()

    def listen(self):
        self.gate.listen(10)
        while True:
            add = self.gate.accept()
            self.reciveFileName()
            self.reciveFile()


    def reciveFileName(self):
        while True:
            data = self.gate.recv(1024)
            self.file = data

    def reciveFile(self):
        createFile = open("new_"+self.file, "wb")
        while True:
            data = self.gate.recv(1024)
            createFile.write(data)
        createFile.close()



a = Server(1111)

客户:

class Client:
    gateway = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    #host = socket.gethostname()
    host = ''
    port = 0
    file = ''

    def __init__(self, host, port, file):
        self.port = port
        self.host = host
        self.file = file
        self.connect()

    def connect(self):
        self.gateway.connect((self.host, self.port))
        self.sendFileName()
        self.sendFile()

    def sendFileName(self):
        self.gateway.send("name:" + self.file)

    def sendFile(self):
        readByte = open(self.file, "rb")
        data = readByte.read()
        readByte.close()

        self.gateway.send(data)
        self.gateway.close()



a = Client('93.103.56.251', 1111, 'data.txt')

Answer 1

服务器有一个用于接受传入连接的服务器套接字，以及用于每个这些连接的另一个套接字。从您的代码:

self.gate.listen(10)
while True:
    add = self.gate.accept()
    self.reciveFileName() # which calls self.gate.recv()

不要在 reciveFilename 和 reciveFile 中对 self.gate 进行操作(顺便说一句，正确的拼写是 receive)，你应该使这些方法在 accepted 上运行连接，像这样:

def listen(self):
    self.gate.listen(10)
    while True:
        conn,address = self.gate.accept()
        self.receiveFilename(conn)

def receiveFilename(self, sock):
    buf = sock.recv(1024)
    print('First bytes I got: ' + buf)

此外，reciveFilename 当前永远在套接字上监听。相反，您必须设计一个适当的协议(protocol)来指定文件名何时结束以及文件内容何时开始。例如，您可以让文件名以 b'\0' 结尾，让服务器搜索该字节。