Won't work in Firefox: MIME type has character set appended, breaks restws MIME type detection

Problem/Motivation

Noticed that my submissions were working in Safari but failing in Firefox when submitting data via POST, PUT, DELETE, etc using jQuery. Safari's browser headers are uploaded as "application/json" whereas Firefox uploads as "application/json; charset=UTF-8". The charset suffix causes the detection of the format to fail.

Not sure if the charset=UTF-8 suffix is common to all Firefox browsers or just mine (FF 5.0.1 on Mac OS/X Snow Leopard).

Proposed resolution

DELETE already handles splitting the $_SERVER['HTTP_ACCEPT'] string up to detect the mimetype correctly. Solution for PUT/POST is to add a similar check that splits the $_SERVER['CONTENT_TYPE'] field on the semi-colon.

[line 228-232 in restws.module]:

      case 'POST':
        // Get format MIME type form HTTP Content type header.
        $parts = explode(';', $_SERVER['CONTENT_TYPE'], 2);
        $format = restws_format_mimetype($parts[0]);
        break;