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POWhy do Chinese characters in JSON cause "bad control character" error with JSON.parse?
 

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  1. POWhy do Chinese characters in JSON cause "bad control character" error with JSON.parse?
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    <p>I have a standard HTML5-type client/server set up. The server side is all Java, and the client side is JavaScript. Using ajax I send queries and receive replies. Up to now, I've had no problems with <code>JSON.parse(data)</code>. However, I have a new user who entered her last name using Chinese characters. This is causing a "JSON.parse: bad control character in string literal" error on the client side.</p> <p>The server builds a reply as follows (exception handling omitted):</p> <pre><code>JSONObject jsono = new JSONObject(); jsono.put("last_name", last_name); jsono.put("first-name", first_name); String response = jsono.toString(); </code></pre> <p>The client receives something like:</p> <pre><code>{"last_name":"Smith","first_name":"Bob"} </code></pre> <p>The reply is displayed on a web page which is set to <code> &lt;meta charset="utf-8"&gt;</code>:</p> <pre><code>var theResult = JSON.parse(data); $('#first_name').html(theResult.first_name); </code></pre> <p>This works just fine. However, for the Chinese user, the client receives</p> <pre><code>{"last_name":"唐","first_name":"Bob"} </code></pre> <p>and this causes the json.parse error. </p> <p>I've now started looking at other characters. For example, <code>Andr&eacute;s</code> does not cause an error, but also does not display properly. It looks like <code>Andr�s</code>.</p> <p>So, I'm clearly missing something. Could someone enlighten me where the problem lies (e.g., is it server side? client side? JavaScript? jquery? html?) and how to solve it?</p>
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    1. COactually it is not a JavaScript problem, I think you use Java on the server-side, and it is related to your `JSONObject API` not client-side, if you really use Java add the tag then wait for my answer.
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      1. USMehran Hatami
    2. COAs Mehran said, it's not JSON or JavaScript. It's almost certainly an encoding problem. If the encoding is correct and everything knows what that encoding is, that works. (Example: http://jsbin.com/eParenUK/1/edit). So for example, if your JSON is returned to the browser using the Windows-1252 charset (or UTF-16, or...) instead of UTF-8...
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      1. UST.J. Crowder
    3. COI added the [java] tag. The server side is all Java. The production version runs on Linux; my development version runs on Mac.
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