jQuery doesn't seem to parse JSON automatically

Question

Here's my client-side jQuery code:

$.ajaxSetup ({
   contentType: "application/json",
   datatype: 'json'
});

$.ajax({
   type: "POST",
   url: "http://localhost:1234/path",
   data: JSON.stringify(myData),
   success: function(aString){
      alert(aString);
   },
   error: function(errorData){
      alert(errorData);
   }
});

Here is the data the server sends out:

200
Content-Type: application/json

"aStringsData"

In the alert the quotes of "aStringData" are displayed. However, I'd expect the quotes to be taken away due to the automatic JSON.parse I expect to happen from datatype: 'json'. Am I wrong on this?

Thanks much, I probably wouldn't have figured it out in quiet some time.. — hansi
– hansi, Commented Jun 13, 2012 at 16:10

thecodeparadox · Accepted Answer · 2012-06-13 15:41:13Z

5

The parameter is actually dataType, not datatype (JavaScript is case sensitive).

You can try with:

dataType: 'json' // not datatype

within your ajaxSetup;

edited Jun 13, 2012 at 15:41

answered Jun 13, 2012 at 15:33

thecodeparadox

87.2k22 gold badges143 silver badges164 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Matt · Accepted Answer · 2012-06-13 17:02:53Z

0

Your response:

"aStringsData"

is not valid JSON I believe, as JSON supposed to start with a {, right?.

You might mean

{
 "string": "data"
}

edited Jun 13, 2012 at 17:02

Matt

75.4k26 gold badges156 silver badges181 bronze badges

answered Jun 13, 2012 at 15:33

Nanne

64.4k16 gold badges123 silver badges166 bronze badges

3 Comments

Nanne Over a year ago

Well, it can be either an object, or a list of things (like a string), but not a string in itself, can it? (of course, I can be mistaken, but the first 3 validators I tried same to say the same)

Nanne Over a year ago

@matt : the json page you link has 2 bolletpoints: they tell that it's an object or a list. There is a definition of "value" later on, sure, but it doens't say the value alone is valid JSON as I read it.

Matt Over a year ago

@Nanne: I'm inclined to agree with you. I tried JSON.parse('"foo"') and it worked fine, but the RFC I read said that JavaScript parsers could accept non-JSON as an extension if they wanted... json.org doesn't do a very good job of explaining it, one way or another.

bluish · Accepted Answer · 2012-07-16 11:51:49Z

-1

you can try to use something like this:

eval(aString)

edited Jul 16, 2012 at 11:51

bluish

27.6k28 gold badges126 silver badges185 bronze badges

answered Jun 13, 2012 at 15:35

ebram khalil

8,3197 gold badges45 silver badges60 bronze badges

1 Comment

Matt Over a year ago

This doesn't come close to answering the question. The question is asking why the JSON isn't parsed automatically, not how to do it.

Collectives™ on Stack Overflow

jQuery doesn't seem to parse JSON automatically

3 Answers 3

Comments

3 Comments

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

Comments

3 Comments

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related