Go websockets 数据 gopherjs

Question

我目前正在尝试使用 websockets 进行通信，我的代码如下(我使用的是 gorilla )

buff := bytes.NewBuffer([]byte{})
binary.Write(buff, binary.LittleEndian, uint64(1))
binary.Write(buff, binary.LittleEndian, len(message))
binary.Write(buff, binary.LittleEndian, message)
client.Write <- buff.Bytes()

c.Write channel 在一个 for select 循环中

case msg := <-client.Write:
    buffer := &bytes.Buffer{}
    err := binary.Write(buffer, binary.LittleEndian, msg)
    if err != nil {
        return
    }
    err = client.Ws.WriteMessage(websocket.BinaryMessage, buffer.Bytes())
    if err != nil {
        return
    }
    buffer.Reset()

客户端只是一个结构体

type Client struct {
    Ws      *websocket.Conn
    Read    chan []byte
    Write   chan []byte
    Account *models.Account
}

消息发送成功，我是这样看的

b, err := conn.Read(buff)
if err != nil {
    utils.Log("Error while reading from socket " + err.Error())
    return
}
buffer := bytes.NewBuffer(buff[:b])
t, err := binary.ReadUvarint(buffer)
utils.Log(t)
if err != nil {
    utils.Log("Error while reading from socket " + err.Error())
    return
}
switch t {
case 1:
    roomsLen, err := binary.ReadUvarint(buffer)
    if err != nil {
        utils.Log("Error while reading rooms len " + err.Error())
        return
    }
    utils.Log(roomsLen)
    roomsBytes := make([]byte, roomsLen)
    binary.Read(buffer, binary.LittleEndian, roomsBytes)
    rooms := []*Room{}
    err = json.Unmarshal(roomsBytes, rooms)
    if err != nil {
        utils.Log("Error while unmarshaling room list " + err.Error())
        return
    }
    utils.Log(rooms)

utils.Log函数就是这个

func Log(msg interface{}) {
    n := time.Now()
    console.Call("log", fmt.Sprintf("[%v:%v:%v] %v", n.Hour(), n.Minute(),    n.Second(), msg))
}

事情是第一个 uint64 是我正在等待的那个 (1) 但第二个 uint64 im 读数总是 0 而登录它 (len(message)) 给我 52

因为它总是 0 我不能正确解码它

所以我不确定我做错了什么，或者这是否不是使用 websockets 的正确方法。

Answer 1

小错误。您正在编写 uint64，但使用“ReadUvarint”来读取它(varint 是一种不同类型的数据)。

package main

import (
    "bytes"
    "encoding/binary"
    "fmt"
)

func main() {
    b := bytes.NewBuffer([]byte{})
    e1 := binary.Write(b, binary.LittleEndian, uint64(10))
    e2 := binary.Write(b, binary.LittleEndian, uint64(20))

    fmt.Println("writing 10 and 20", e1, e2)

    {
        r := bytes.NewBuffer(b.Bytes())
        res, e := binary.ReadUvarint(r)
        res2, e2 := binary.ReadUvarint(r)
        fmt.Println("using readuvarint here        :", res, res2, e, e2, b.Bytes())
    }
    {
        r := bytes.NewBuffer(b.Bytes())
        var res, res2 uint64
        e := binary.Read(r, binary.LittleEndian, &res)
        e2 := binary.Read(r, binary.LittleEndian, &res2)
        fmt.Println("using read into uint64's here :", res, res2, e, e2, b.Bytes())
    }
}