ACCEPT_ENCODING
ACCEPT_ENCODING: "accept-encoding"
AUTHORIZATION
AUTHORIZATION: "authorization"
CACHE_CONTROL
CACHE_CONTROL: "cache-control"
CONNECTION
CONNECTION: "connection"
CONTENT_DISPOSITION
CONTENT_DISPOSITION: "content-disposition"
CONTENT_LENGTH
CONTENT_LENGTH: "content-length"
CONTENT_SECURITY_POLICY
CONTENT_SECURITY_POLICY: "content-security-policy"
CONTENT_TYPE
CONTENT_TYPE: "content-type"
IF_NONE_MATCH
IF_NONE_MATCH: "if-none-match"
IIF_MODIFIED_SINCE
IIF_MODIFIED_SINCE: "if-modified-since"
REFERER
REFERER: "referer"
REFERRER_POLICY
REFERRER_POLICY: "referrer-policy"
SEC_FETCH_MODE
SEC_FETCH_MODE: "sec-fetch-mode"
SEC_FETCH_SITE
SEC_FETCH_SITE: "sec-fetch-site"
STRICT_TRANSPORT_SECURITY
STRICT_TRANSPORT_SECURITY: "strict-transport-security"
USER_AGENT
USER_AGENT: "user-agent"
X_CONTENT_TYPE_OPTIONS
X_CONTENT_TYPE_OPTIONS: "x-content-type-options"
X_FORWARDED_FOR
X_FORWARDED_FOR: "x-forwarded-for"
X_FORWARDED_HOST
X_FORWARDED_HOST: "x-forwarded-host"
X_FORWARDED_PROTO
X_FORWARDED_PROTO: "x-forwarded-proto"
X_FRAME_OPTIONS
X_FRAME_OPTIONS: "x-frame-options"
X_REAL_IP
X_REAL_IP: "x-real-ip"
X_REQUESTED_WITH
X_REQUESTED_WITH: "x-requested-with"
X_VERSION
X_VERSION: "x-version"
Known http headers.