Question

使用Python构建我自己的代理服务器。客户端与代理之间以及服务器与代理之间的连接均成功。但是，例如，当我刷新网页时，使用recv（）时不会得到任何数据。


class Proxy_server_connection(Thread):
    def __init__(self, host, port):
        super(Proxy_server_connection, self).__init__()
        self.client = None 
        self.port = port 
        self.host = host 
        self.server = socket.socket(socket.AF_INET, socket.SOCK_STREAM) 
        self.server.connect((host, port)) 

    def run(self):
        while True:
            data = self.server.recv(4096) 
            print ("prox_server: ", data)
            if data:
                self.client.sendall(data)


class Proxy_client_connection(Thread):
    def __init__(self, host,port):
        super(Proxy_client_connection, self).__init__()
        self.server = None
        self.port = port
        self.host = host
        s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
        s.bind((host, port))
        s.listen(1)
        self.client, addr = s.accept() 

    def run(self):
        while True:
            data = self.client.recv(4096)
            print ("prox_client: ", data)
            if data:
                self.server.sendall(data) #socket connected to real server


class Proxy(Thread):

    def __init__(self, from_host, to_host, port):
        super(Proxy, self).__init__()
        self.from_host = from_host
        self.to_host = to_host
        self.port = port

    def run(self):
        while True:
            print (("[proxy({})] setting up").format(self.port))
            self.pc_connection = Proxy_client_connection(self.from_host, self.port)

            #pick out url
            data = self.pc_connection.client.recv(4096).decode()
            host_word_len = 6
            url_start = data.find("Host: ", 0, len(data)-1)
            url_end = data.find("\r\n", url_start, len(data)-1)
            url = data[url_start + host_word_len:url_end]

            HTTP_PORT = 80
            self.ps_connection = Proxy_server_connection(url, HTTP_PORT)
            print(("[proxy({})] connection established").format(self.port))

            self.pc_connection.server = self.ps_connection.server
            self.ps_connection.client = self.pc_connection.client

            self.pc_connection.start()
            self.ps_connection.start()

master_server = Proxy('0.0.0.0', '127.0.0.1', 12345)
master_server.start()

当我启动代理并更新网页时，结果如下：

[proxy(12345)] setting up
[proxy(12345)] connection established
[proxy(12345)] setting up

(then it takes a couple of seconds in between)


prox_server: b''
prox_server: b''
prox_server: b''
etc.

因此由于某种原因，它从不接收任何数据，因此被困在Proxy_server_connection类的while循环中。这个代理我在做什么错了？

python recv（）中的代理服务器未接收到数据

0 个答案: