Handler Functions
Each HTTP Request type has a separate
handler function.
GET -> doGet(HttpServletRequest, HttpServletResponse)
POST -> doPost(HttpServletRequest, HttpServletResponse)
PUT -> doPut (HttpServletRequest, HttpServletResponse)
DELETE -> doDelete (HttpServletRequest,
HttpServletResponse)
TRACE -> doTrace (HttpServletRequest,
HttpServletResponse)
OPTIONS -> doOptions (HttpServletRequest,
HttpServletResponse)
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