[
ACCEPT = "accept".freeze,
ACCEPT_CHARSET = "accept-charset".freeze,
ACCEPT_ENCODING = "accept-encoding".freeze,
ACCEPT_LANGUAGE = "accept-language".freeze,
ACCEPT_RANGES = "accept-ranges".freeze,
ACCESS_CONTROL_ALLOW_CREDENTIALS = "access-control-allow-credentials".freeze,
= "access-control-allow-headers".freeze,
ACCESS_CONTROL_ALLOW_METHODS = "access-control-allow-methods".freeze,
ACCESS_CONTROL_ALLOW_ORIGIN = "access-control-allow-origin".freeze,
= "access-control-expose-headers".freeze,
ACCESS_CONTROL_MAX_AGE = "access-control-max-age".freeze,
= "access-control-request-headers".freeze,
ACCESS_CONTROL_REQUEST_METHOD = "access-control-request-method".freeze,
AGE = "age".freeze,
ALLOW = "allow".freeze,
ALT_SVC = "alt-svc".freeze,
AUTHORIZATION = "authorization".freeze,
CACHE_CONTROL = "cache-control".freeze,
CACHE_STATUS = "cache-status".freeze,
CDN_CACHE_CONTROL = "cdn-cache-control".freeze,
CONNECTION = "connection".freeze,
CONTENT_DISPOSITION = "content-disposition".freeze,
CONTENT_ENCODING = "content-encoding".freeze,
CONTENT_LANGUAGE = "content-language".freeze,
CONTENT_LENGTH = "content-length".freeze,
CONTENT_LOCATION = "content-location".freeze,
CONTENT_RANGE = "content-range".freeze,
CONTENT_SECURITY_POLICY_REPORT_ONLY = "content-security-policy-report-only".freeze,
CONTENT_TYPE = "content-type".freeze,
COOKIE = "cookie".freeze,
DNT = "dnt".freeze,
DATE = "date".freeze,
ETAG = "etag".freeze,
EXPECT = "expect".freeze,
EXPIRES = "expires".freeze,
FORWARDED = "forwarded".freeze,
FROM = "from".freeze,
HOST = "host".freeze,
IF_MATCH = "if-match".freeze,
IF_MODIFIED_SINCE = "if-modified-since".freeze,
IF_NONE_MATCH = "if-none-match".freeze,
IF_RANGE = "if-range".freeze,
IF_UNMODIFIED_SINCE = "if-unmodified-since".freeze,
LAST_MODIFIED = "last-modified".freeze,
LINK = "link".freeze,
LOCATION = "location".freeze,
MAX_FORWARDS = "max-forwards".freeze,
ORIGIN = "origin".freeze,
PRAGMA = "pragma".freeze,
PROXY_AUTHENTICATE = "proxy-authenticate".freeze,
PROXY_AUTHORIZATION = "proxy-authorization".freeze,
PUBLIC_KEY_PINS = "public-key-pins".freeze,
PUBLIC_KEY_PINS_REPORT_ONLY = "public-key-pins-report-only".freeze,
RANGE = "range".freeze,
REFERER = "referer".freeze,
REFERRER_POLICY = "referrer-policy".freeze,
REFRESH = "refresh".freeze,
RETRY_AFTER = "retry-after".freeze,
SEC_WEBSOCKET_ACCEPT = "sec-websocket-accept".freeze,
SEC_WEBSOCKET_EXTENSIONS = "sec-websocket-extensions".freeze,
SEC_WEBSOCKET_KEY = "sec-websocket-key".freeze,
SEC_WEBSOCKET_PROTOCOL = "sec-websocket-protocol".freeze,
SEC_WEBSOCKET_VERSION = "sec-websocket-version".freeze,
SERVER = "server".freeze,
SET_COOKIE = "set-cookie".freeze,
STRICT_TRANSPORT_SECURITY = "strict-transport-security".freeze,
TE = "te".freeze,
TRAILER = "trailer".freeze,
TRANSFER_ENCODING = "transfer-encoding".freeze,
USER_AGENT = "user-agent".freeze,
UPGRADE = "upgrade".freeze,
UPGRADE_INSECURE_REQUESTS = "upgrade-insecure-requests".freeze,
VARY = "vary".freeze,
VIA = "via".freeze,
WARNING = "warning".freeze,
WWW_AUTHENTICATE = "www-authenticate".freeze,
X_CONTENT_TYPE_OPTIONS = "x-content-type-options".freeze,
X_DNS_PREFETCH_CONTROL = "x-dns-prefetch-control".freeze,
X_FRAME_OPTIONS = "x-frame-options".freeze,
X_XSS_PROTECTION = "x-xss-protection".freeze
]