duanliaouu965826 2014-07-08 20:20
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从服务器发送JSON需要两次JSON.parse

For some reason I have to call JSON.parse twice to create an object in JavaScript. I'm generating JSON from a Go (Golang) server.

This is the JavaScript code I'm using.

ws.onmessage = function(e) {
    console.log(e.data);
    console.log(JSON.parse(e.data));
    console.log(JSON.parse(JSON.parse(e.data)));
};

And this is what I saw in Chrome's console.

"{\"hello\":\"world\"}"
{"hello":"world"}
Object {hello: "world"}

This is how I'm generating JSON on the server side. I suspect my server code is wrong.

var jsonBuffer bytes.Buffer

jsonBuffer.WriteString("{")
for key, value := range mydict {
    jsonBuffer.WriteString(`"` + key `":"` + value + `"`)
}
jsonBuffer.WriteString("}")

return jsonBuffer.String()

This is a simplification of what I'm working on. In reality, mydict is defined as map[string]mystruct.

mystruct is something like this:

type mystruct struct {
    Foo int
    Bar float64
}
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1条回答 默认 最新

  • dongmei3498 2014-07-11 06:11
    关注

    Why are you building the json response by hand? I would suggest to use the json package. Your code would look something like this

    package main
    
    import (
        "fmt"
        "encoding/json"
    )
    
    type Mystruct struct {
        Foo int
        Bar float64
    }
    
    func main() {
        m := Mystruct{1,100}
        j, _ := json.Marshal(m)
        fmt.Print(string(j))
    }
    
    本回答被题主选为最佳回答 , 对您是否有帮助呢?
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