java - Http 400 in appengine when using URLFetch with Http Method 'DELETE' -

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I am unable to request "DELETE" using the code given below: 

  URLFetchService fetchService = URLFetchServiceFactory.getURLFetchService (); URL posturals = new URL ("http://www.example.com/comment?token=xxx"); HTTPResponse response = fetchService.fetch (new HTTPRequest (posturl, HTTPMethod.DELETE)); Int responseCode = response.getResponseCode ();   
 This is for Google Appengine 'DELETE' request is for the Facebook Graph API. The above code gives me a status code 400 - bad request.  
 This is an open source Java library that I have created for the Facebook Graph API.   
 
 
 This is not really an app engine problem; This means that the destination webserver will not accept your request.  
 If you are actually trying to send DELETE to example.com, this is your problem. If this is considered a clear URL, then you have left the problem that facilitates troubleshooting.

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