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I am seeing a strange issue when fetching a JSON object from a URL using Jquery $.ajax function.

I am using the following JQuery call to retrieve the JSON object:

1  $.ajax({
2       url: '/test/getjson',
3       success: function(data){
4                     doSomething(data); //(breakpoint here)
5                },
6       error: function(x,y,z){
7                     //error..
8               }
9  });

The URL '/test/getjson' returns the following JSON object (Here is what the response looks like in Firebug):

{
    "rsp": {
        "date": "1299195954782" ,
        "type": "Type1" ,
        "Main": {
            "Category1" : {
                "private" : "Y" ,
                "properties" : {
                    "one" : {
                        "response" : "" ,
                        "text" : "label" ,
                        "type" : "property"
                    },
                    "two" : {
                        "options" : [
                            "1" ,
                            "2" ,
                            "3" ,
                            "4" ,
                            "5" ,
                            "6" ,
                            "7" ,
                            "8" ,
                            "9" ,
                            "10"
                        ],
                        "response" : "1" ,
                        "text" : "label2" ,
                        "type" : "property2"
                    }
                }
            },
            "username" : "spiderman"
        }
    }
}

Problem

The problem is that all arrays in the JSON object have extra values with keys 'remove' and '__proto__' after being parsed by JQuery (Firebug's Debugger viewing JSON data object, breakpoint at line 4 in the JS snippet above):

[JSON object as seen by Firebugs debugger]

And here is a closer look at the strange part of the JSON object:

[Closer look at the unknown data]

Thanks ahead everyone :)

I am seeing a strange issue when fetching a JSON object from a URL using Jquery $.ajax function.

I am using the following JQuery call to retrieve the JSON object:

1  $.ajax({
2       url: '/test/getjson',
3       success: function(data){
4                     doSomething(data); //(breakpoint here)
5                },
6       error: function(x,y,z){
7                     //error..
8               }
9  });

The URL '/test/getjson' returns the following JSON object (Here is what the response looks like in Firebug):

{
    "rsp": {
        "date": "1299195954782" ,
        "type": "Type1" ,
        "Main": {
            "Category1" : {
                "private" : "Y" ,
                "properties" : {
                    "one" : {
                        "response" : "" ,
                        "text" : "label" ,
                        "type" : "property"
                    },
                    "two" : {
                        "options" : [
                            "1" ,
                            "2" ,
                            "3" ,
                            "4" ,
                            "5" ,
                            "6" ,
                            "7" ,
                            "8" ,
                            "9" ,
                            "10"
                        ],
                        "response" : "1" ,
                        "text" : "label2" ,
                        "type" : "property2"
                    }
                }
            },
            "username" : "spiderman"
        }
    }
}

Problem

The problem is that all arrays in the JSON object have extra values with keys 'remove' and '__proto__' after being parsed by JQuery (Firebug's Debugger viewing JSON data object, breakpoint at line 4 in the JS snippet above):

[JSON object as seen by Firebugs debugger]

And here is a closer look at the strange part of the JSON object:

[Closer look at the unknown data]

Thanks ahead everyone :)

  • javascript
  • jquery
  • json
  • parsing
Share edited Mar 5, 2011 at 17:06 Oleg 222k35 gold badges413 silver badges812 bronze badges asked Mar 4, 2011 at 18:43 tjmehtatjmehta 31.3k4 gold badges24 silver badges18 bronze badges
Add a ment  | 

1 Answer 1

Reset to default 8

Stop using "for ... in" to iterate over arrays, and use an index variable.

for (var i = 0; i < theArray.length; ++i) {
  var element = theArray[i];
  // ...
}

Those object properties are there thanks to the JavaScript runtime in your browser. I'm not sure why they'd cause you any trouble because they should not be iterable. Perhaps if you showed the actual code that you've got to process the ajax response, the issue might bee more clear.

本文标签： javascriptJQuery JSON parsingAJAX issue (39remove39 and 39proto39 keys in arrays)Stack Overflow

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