The CONNECT method is reserved for use with a proxy that can dynamically switch to being a tunnel. The DELETE method requests that the origin server delete the resource identified by the Request-URI. The GET method means retrieve whatever information (in the form of an entity) is identified by the Request-URI. The HEAD method is identical to GET except that the server MUST NOT return a message-body in the response. The PATCH method requests that a set of changes described in the request entity be applied to the resource identified by the Request-URI. The POST method is used to request that the origin server accept the entity enclosed in the request as a new subordinate of the resource identified by the Request-URI in the Request-Line. The PUT method requests that the enclosed entity be stored under the supplied Request-URI. The OPTIONS method represents a request for information about the communication options available on the request/response chain identified by the Request-URI. The TRACE method is used to invoke a remote, application-layer loop-back of the request message. http://www.ietf.org/rfc/rfc2616.txt http://www.ietf.org/rfc/rfc5789.txt