I am using Node.js.

I have a piece of code that works well in returning the expected response 
and the response is received quickly:

if (req.accepts('json')) {

    res.header('Content-Type', 'application/json');

    res.send(res.locals.items, 200);

}


In addition to the Status 200, I want to add a message in the header. 
Therefore, I modified the code above a little bit to be consistent with the 
syntax, which is, *response.writeHead(statusCode, [reasonPhrase], 
[headers])*,  stated in the Node.js v0.10.26 Manual & Documentation 
(http://nodejs.org/api/http.html):

if (req.accepts('json')) {

    res.writeHead( 200, 'my_customizd_message', {'Content-Type' : 
'application/json'} );

    res.send(res.locals.items);

}

then, I got an error in the console saying "Error : can't set headers after 
they are sent".

I tried something else:

if (req.accepts('json')) {

    res.writeHead( 200, 'my_customizd_message', {'Content-Type' : 
'application/json'} );

    res.end();

}

There is no error message on the console. But, nothing is returned. The 
code is running forever. I am hoping someone could help me out. Thank you 
very much.
  
 

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