如何使用客户端javascript向具有特定端口的服务器发送请求？

Question

The question might not describe actually my problem. So I have aa host A. I want to send a request with a payload using js in html page. The destination is another Host B. Host B is on another network and I want it to receive the request from A. I don't know how to do that. I tried setting up a simple python server that just prints the request:

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind((localhost, PORT)) ## localhost: 127.0.0.1 and random port
s.listen()
conn, addr = s.accept()
with conn:
    print('Connected by', addr)
    data = ""
    while True:
        data += conn.recv(2048)
        if not data:
            break
    print(data)

I feel like this is very wrong. Anyway, on AI tried to send a get request using fetch api:

fetch(`http://${public_ip_of_B}:${port_of_B}/${payload}`)

The request remains on pending status and throws an error.

So how can I send the request from A to B? Thanks in advance

Answer 1

Don't bind to localhost . To accept connections from anywhere, use an empty string for the host address when binding.

s.bind(('', PORT))