Syntax error in a valid JSON document

I am using Node js and this is how I build my response :

response.writeHead(200, {"Content-Type": "script"});

The client makes a jsonp request and in Chrome as in Safari I get this error :

Resource interpreted as Script but transferred with MIME type text/plain.
SyntaxError: Unexpected token ':'

The browser gives access to the response it recieved :


Where does the syntax error come from ?


The client is trying to execute the Script resource (it is interpreted as Script, not JSON). {"test":fail"} is invalid JavaScript -- try running it in the console.

jsonp requires a callback that is ordinarily requested by the client so that it can be run properly. You should actually be doing something like:

response.write(request.query.callback + "(" + JSON.stringify(json) + ")");

This will be emitted as


which is valid JavaScript and will run properly.

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