HttpHeaders.ACCEPT
HttpHeaders.ACCEPT_CHARSET
HttpHeaders.ACCEPT_ENCODING
HttpHeaders.ACCEPT_LANGUAGE
HttpHeaders.ACCEPT_RANGES
HttpHeaders.AGE
HttpHeaders.ALLOW
HttpHeaders.AUTHORIZATION
HttpHeaders.CACHE_CONTROL
HttpHeaders.CONNECTION
HttpHeaders.CONTENT_DISPOSITION
HttpHeaders.CONTENT_ENCODING
HttpHeaders.CONTENT_LANGUAGE
HttpHeaders.CONTENT_LENGTH
HttpHeaders.CONTENT_LOCATION
HttpHeaders.CONTENT_RANGE
HttpHeaders.CONTENT_TYPE
HttpHeaders.COOKIE
HttpHeaders.DATE
HttpHeaders.ETAG
HttpHeaders.EXPECT
HttpHeaders.EXPIRES
HttpHeaders.FROM
HttpHeaders.HOST
HttpHeaders.IF_MATCH
HttpHeaders.IF_MODIFIED_SINCE
HttpHeaders.IF_NONE_MATCH
HttpHeaders.IF_RANGE
HttpHeaders.IF_UNMODIFIED_SINCE
HttpHeaders.LAST_MODIFIED
HttpHeaders.LOCATION
HttpHeaders.MAX_FORWARDS
HttpHeaders.PRAGMA
HttpHeaders.PROXY_AUTHENTICATE
HttpHeaders.PROXY_AUTHORIZATION
HttpHeaders.RANGE
HttpHeaders.REFERER
HttpHeaders.RETRY_AFTER
HttpHeaders.SERVER
HttpHeaders.SET_COOKIE
HttpHeaders.TE
HttpHeaders.TRAILER
HttpHeaders.TRANSFER_ENCODING
HttpHeaders.UPGRADE
HttpHeaders.USER_AGENT
HttpHeaders.VARY
HttpHeaders.VIA
HttpHeaders.WARNING
HttpHeaders.WWW_AUTHENTICATE