nodejs zmq - 收到的缓冲区数据比实际消息

Question

我正在做 this link 中的 pubsub 的例子，并设法让它工作。

server.js:

const zmq = require("zeromq")

async function run() {
  const sock = new zmq.Publisher

  await sock.bind("tcp://127.0.0.1:3000")
  console.log("Publisher bound to port 3000")

  while (true) {
    console.log("sending a multipart message envelope")
    await sock.send(["kitty cats", "meow!"])
    await new Promise(resolve => setTimeout(resolve, 500))
  }
}

run()

client.js:

const zmq = require("zeromq")

async function run() {
  const sock = new zmq.Subscriber

  sock.connect("tcp://127.0.0.1:3000")
  sock.subscribe("kitty cats")
  console.log("Subscriber connected to port 3000")

  for await (const [topic, msg] of sock) {
    console.log("received a message related to:", topic, "containing message:", msg)
  }
}

run()

所以我希望来自 client.js 的日志是：

received a message related to: kitty cats containing message: meow!

但改用这个：

received a message related to: <Buffer 6b 69 74 74 79 20 63 61 74 73> containing message: <Buffer 6d 65 6f 77 21>

这正常吗？或者有没有办法以 string 形式取回我的消息？

Answer 1

您需要使用 toString() 将缓冲区转换为字符串（默认为 utf-8 编码）

或者您可以使用来自 nodejs

的 string-decoder

和stringDecoder.write(buffer)

即stringDecoder.write(topic)

const zmq = require("zeromq")

async function run() {
  const sock = new zmq.Subscriber

  sock.connect("tcp://127.0.0.1:3000")
  sock.subscribe("kitty cats")
  console.log("Subscriber connected to port 3000")

  for await (const [topic, msg] of sock) {
    console.log("received a message related to:", topic.toString("utf=8"), "containing message:", msg.toString("utf-8")
  }
}

run()

nodejs zmq - 收到的缓冲区数据比实际消息

nodejs zmq - received buffer data than actual message

node.js

zeromq