javascript - 尝试从Javascript发送JSON变量到服务器(Trying to send a JSON variable from Javascript to go server)

Question

This should be straight forward.

(这应该很简单。)

I have looked at all the examples I can find on the web and think my code is right.

(我看了所有可以在网上找到的示例，并认为我的代码是正确的。)

But when I send two strings in a JSON variable from JavaScript to a Go web server via a websocket, all I ever get is: msg = {}.

(但是，当我通过websocket将两个JSON变量中的字符串从JavaScript发送到Go Web服务器时，我得到的只是：msg = {}。)

Please let me know what I am doing wrong.

(请让我知道我在做什么错。)

Thanks.

(谢谢。)

HTML:

(HTML：)

Foo: <input id="fooIn" type="text" />
Bar: <input id="BarIn" type="text" />
<button onclick="Send()">Send</button>

<script>
    var socket = new WebSocket("ws://localhost:8080/ws");

    socket.onmessage = function (event) {
        output.innerHTML += "Server: " + event.data + "
";
    };

    function Send() { 
        var wsObj = {foo:document.getElementById("fooIn").value, 
                    bar:document.getElementById("BarIn").value};
        socket.send(JSON.stringify(wsObj));
    };
</script>

Go:

(走：)

package main
import (
    "fmt"
    "log"
    "net/http"
    "github.com/gorilla/websocket"
)
type fooBar struct {
    foo string `json:"foo"`
    bar string `json:"bar"`
}
var upgrader = websocket.Upgrader{}

func main() {
    http.HandleFunc("/ws", func(w http.ResponseWriter, r *http.Request) {
        ws, _ := upgrader.Upgrade(w, r, nil) // error ignored for sake of simplicity
        defer ws.Close()
        var msg fooBar
        for {
            err := ws.ReadJSON(&msg)        
            if err != nil {
                log.Fatal("ReadJSON error: ", err)  
            }           
            log.Print("Got: ", msg, " Foo: ", msg.foo, " Bar: ", msg.bar)  
        }
    })
    http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
        http.ServeFile(w, r, "websockets.html")
    })
    fmt.Print("Running Server on :8080.
")
    err := http.ListenAndServe(":8080", nil)
    if err != nil {
        log.Fatal("ListenAndServe error: ", err)  
    }
}```

  ask by John Layne translate from so

Answer 1

等待大神答复