JSON有什么问题？

Question

Anybody out there notice anything wrong with this JSON? It validates at JSONLint.com, but neither Chrome nor Firefox's native JSON parse functions will properly parse it.

Any ideas?

{
        "result": "{\"players\":[{\"name\":\"User 522\",\"turn\":true,\"score\":0},{\"name\":\"User 925\",\"turn\":false,\"score\":5}],\"enableControls\":false}",
        "error": "null",
        "id": "7"
}

Answer 1

Even though you json looks kind of weird, it conforms with the json specification.

You problem comes from an escaping problem when defining literals in Firefox or Chrome. The "\\" (backslash) character needs to be escaped with a backslash.

Example 1:

JSON.parse('{"key":"\""}'); breaks

Example 2:

JSON.parse('{"key":"\\""}'); works

So JSONLint.com is right, and Firefox is right and Chrome is right also.

You would not hit this problem if you were testing through an ajax request, because the escaping would be handled automatically. You are hitting the problem because you want to feed the json string as a literal (hence the need for escaping)

I hope this will help you.

Answer 2

I see now what is happening. result is itself an embedded json string.

Let me regroup and answer again.

Your server is not doing you any favors here.

Again, the string as given will NOT parse thus is not a valid JSON string. And I don't see a way to massage it to get it to parse.

Are you SURE that this is the string that is being returned or perhaps this is a visualization of the string from a debugger?

That is not valid JSON text, that is a somewhat mishappen JavaScript literal.

You do not parse a literal, you parse text to obtain a literal.

Your literal would be better represented as...

 
 
 
 
  
  
  var obj = { result: { players: [{ name: "User 522", turn: true, score: 0 }, { name: "User 925", turn: false, score: 5 }], enableControls: false }, error: null, id: 7 };
 
 
  

and this is the equivalent JSON text. Try parsing this..

 
 
 
 
  
  
  var json = '{"result":{"players":[{"name":"User522","turn":true,"score":0},{"name":"User925","turn": false,"score":5}],"enableControls":false},"error":null,"id":7}';