- com.google.common.net.HttpHeaders

```
@GwtCompatible
public final class HttpHeaders
extends 
```
Contains constant definitions for the HTTP header field names. See:
Since:

11.0

Author:

Kurt Alfred Kluever

Nested Class Summary

Nested Classes
Modifier and Type Class Description

static class HttpHeaders.ReferrerPolicyValues
Values for the header.

Field Summary

Fields
Modifier and Type	Field	Description
`static`	`ACCEPT`	The HTTP `Accept` header field name.
`static`	`ACCEPT_CHARSET`	The HTTP `Accept-Charset` header field name.
`static`	`ACCEPT_ENCODING`	The HTTP `Accept-Encoding` header field name.
`static`	`ACCEPT_LANGUAGE`	The HTTP `Accept-Language` header field name.
`static`	`ACCEPT_RANGES`	The HTTP `Accept-Ranges` header field name.
`static`	`ACCESS_CONTROL_ALLOW_CREDENTIALS`	The HTTP `Access-Control-Allow-Credentials` header field name.
`static`	`ACCESS_CONTROL_ALLOW_HEADERS`	The HTTP `Access-Control-Allow-Headers` header field name.
`static`	`ACCESS_CONTROL_ALLOW_METHODS`	The HTTP `Access-Control-Allow-Methods` header field name.
`static`	`ACCESS_CONTROL_ALLOW_ORIGIN`	The HTTP `Access-Control-Allow-Origin` header field name.
`static`	`ACCESS_CONTROL_EXPOSE_HEADERS`	The HTTP `Access-Control-Expose-Headers` header field name.
`static`	`ACCESS_CONTROL_MAX_AGE`	The HTTP `Access-Control-Max-Age` header field name.
`static`	`ACCESS_CONTROL_REQUEST_HEADERS`	The HTTP `Access-Control-Request-Headers` header field name.
`static`	`ACCESS_CONTROL_REQUEST_METHOD`	The HTTP `Access-Control-Request-Method` header field name.
`static`	`AGE`	The HTTP `Age` header field name.
`static`	`ALLOW`	The HTTP `Allow` header field name.
`static`	`AUTHORIZATION`	The HTTP `Authorization` header field name.
`static`	`CACHE_CONTROL`	The HTTP `Cache-Control` header field name.
`static`	`CDN_LOOP`	The HTTP header field name.
`static`	`CONNECTION`	The HTTP `Connection` header field name.
`static`	`CONTENT_DISPOSITION`	The HTTP `Content-Disposition` header field name.
`static`	`CONTENT_ENCODING`	The HTTP `Content-Encoding` header field name.
`static`	`CONTENT_LANGUAGE`	The HTTP `Content-Language` header field name.
`static`	`CONTENT_LENGTH`	The HTTP `Content-Length` header field name.
`static`	`CONTENT_LOCATION`	The HTTP `Content-Location` header field name.
`static`	`CONTENT_MD5`	The HTTP `Content-MD5` header field name.
`static`	`CONTENT_RANGE`	The HTTP `Content-Range` header field name.
`static`	`CONTENT_SECURITY_POLICY`	The HTTP header field name.
`static`	`CONTENT_SECURITY_POLICY_REPORT_ONLY`	The HTTP header field name.
`static`	`CONTENT_TYPE`	The HTTP `Content-Type` header field name.
`static`	`COOKIE`	The HTTP `Cookie` header field name.
`static`	`CROSS_ORIGIN_EMBEDDER_POLICY`	The HTTP header field name.
`static`	`CROSS_ORIGIN_EMBEDDER_POLICY_REPORT_ONLY`	The HTTP header field name.
`static`	`CROSS_ORIGIN_OPENER_POLICY`	The HTTP Cross-Origin-Opener-Policy header field name.
`static`	`CROSS_ORIGIN_RESOURCE_POLICY`	The HTTP header field name.
`static`	`DATE`	The HTTP `Date` header field name.
`static`	`DNT`	The HTTP `DNT` header field name.
`static`	`EARLY_DATA`	The HTTP header field name.
`static`	`ETAG`	The HTTP `ETag` header field name.
`static`	`EXPECT`	The HTTP `Expect` header field name.
`static`	`EXPIRES`	The HTTP `Expires` header field name.
`static`	`FOLLOW_ONLY_WHEN_PRERENDER_SHOWN`	The HTTP `Follow-Only-When-Prerender-Shown` header field name.
`static`	`FORWARDED`	The HTTP header field name.
`static`	`FROM`	The HTTP `From` header field name.
`static`	`HOST`	The HTTP `Host` header field name.
`static`	`HTTP2_SETTINGS`	The HTTP header field name.
`static`	`IF_MATCH`	The HTTP `If-Match` header field name.
`static`	`IF_MODIFIED_SINCE`	The HTTP `If-Modified-Since` header field name.
`static`	`IF_NONE_MATCH`	The HTTP `If-None-Match` header field name.
`static`	`IF_RANGE`	The HTTP `If-Range` header field name.
`static`	`IF_UNMODIFIED_SINCE`	The HTTP `If-Unmodified-Since` header field name.
`static`	`LAST_EVENT_ID`	The HTTP `Last-Event-ID` header field name.
`static`	`LAST_MODIFIED`	The HTTP `Last-Modified` header field name.
`static`	`LINK`	The HTTP `Link` header field name.
`static`	`LOCATION`	The HTTP `Location` header field name.
`static`	`MAX_FORWARDS`	The HTTP `Max-Forwards` header field name.
`static`	`ORIGIN`	The HTTP `Origin` header field name.
`static`	`ORIGIN_ISOLATION`	The HTTP header field name.
`static`	`ORIGIN_TRIAL`	The HTTP header field name.
`static`	`P3P`	The HTTP `P3P` header field name.
`static`	`PING_FROM`	The HTTP header field name.
`static`	`PING_TO`	The HTTP header field name.
`static`	`PRAGMA`	The HTTP `Pragma` header field name.
`static`	`PROXY_AUTHENTICATE`	The HTTP `Proxy-Authenticate` header field name.
`static`	`PROXY_AUTHORIZATION`	The HTTP `Proxy-Authorization` header field name.
`static`	`PUBLIC_KEY_PINS`	The HTTP header field name.
`static`	`PUBLIC_KEY_PINS_REPORT_ONLY`	The HTTP header field name.
`static`	`PURPOSE`	The HTTP header field name.
`static`	`RANGE`	The HTTP `Range` header field name.
`static`	`REFERER`	The HTTP `Referer` header field name.
`static`	`REFERRER_POLICY`	The HTTP header field name.
`static`	`REFRESH`	The HTTP `Refresh` header field name.
`static`	`REPORT_TO`	The HTTP header field name.
`static`	`RETRY_AFTER`	The HTTP `Retry-After` header field name.
`static`	`SEC_CH_UA`	The HTTP header field name.
`static`	`SEC_CH_UA_ARCH`	The HTTP header field name.
`static`	`SEC_CH_UA_FULL_VERSION`	The HTTP header field name.
`static`	`SEC_CH_UA_MOBILE`	The HTTP header field name.
`static`	`SEC_CH_UA_MODEL`	The HTTP header field name.
`static`	`SEC_CH_UA_PLATFORM`	The HTTP header field name.
`static`	`SEC_CH_UA_PLATFORM_VERSION`	The HTTP header field name.
`static`	`SEC_FETCH_DEST`	The HTTP header field name.
`static`	`SEC_FETCH_MODE`	The HTTP header field name.
`static`	`SEC_FETCH_SITE`	The HTTP header field name.
`static`	`SEC_FETCH_USER`	The HTTP header field name.
`static`	`SEC_METADATA`	The HTTP header field name.
`static`	`SEC_PROVIDED_TOKEN_BINDING_ID`	The HTTP header field name.
`static`	`SEC_REFERRED_TOKEN_BINDING_ID`	The HTTP header field name.
`static`	`SEC_TOKEN_BINDING`	The HTTP header field name.
`static`	`SEC_WEBSOCKET_ACCEPT`	The HTTP header field name.
`static`	`SEC_WEBSOCKET_EXTENSIONS`	The HTTP header field name.
`static`	`SEC_WEBSOCKET_KEY`	The HTTP header field name.
`static`	`SEC_WEBSOCKET_PROTOCOL`	The HTTP header field name.
`static`	`SEC_WEBSOCKET_VERSION`	The HTTP header field name.
`static`	`SERVER`	The HTTP `Server` header field name.
`static`	`SERVER_TIMING`	The HTTP header field name.
`static`	`SERVICE_WORKER`	The HTTP header field name.
`static`	`SERVICE_WORKER_ALLOWED`	The HTTP header field name.
`static`	`SET_COOKIE`	The HTTP `Set-Cookie` header field name.
`static`	`SET_COOKIE2`	The HTTP `Set-Cookie2` header field name.
`static`	`SOURCE_MAP`	The HTTP header field name.
`static`	`STRICT_TRANSPORT_SECURITY`	The HTTP header field name.
`static`	`TE`	The HTTP `TE` header field name.
`static`	`TIMING_ALLOW_ORIGIN`	The HTTP header field name.
`static`	`TRAILER`	The HTTP `Trailer` header field name.
`static`	`TRANSFER_ENCODING`	The HTTP `Transfer-Encoding` header field name.
`static`	`UPGRADE`	The HTTP `Upgrade` header field name.
`static`	`UPGRADE_INSECURE_REQUESTS`	The HTTP header field name.
`static`	`USER_AGENT`	The HTTP `User-Agent` header field name.
`static`	`VARY`	The HTTP `Vary` header field name.
`static`	`VIA`	The HTTP `Via` header field name.
`static`	`WARNING`	The HTTP `Warning` header field name.
`static`	`WWW_AUTHENTICATE`	The HTTP `WWW-Authenticate` header field name.
`static`	`X_CONTENT_SECURITY_POLICY`	The HTTP nonstandard `X-Content-Security-Policy` header field name.
`static`	`X_CONTENT_SECURITY_POLICY_REPORT_ONLY`	The HTTP nonstandard `X-Content-Security-Policy-Report-Only` header field name.
`static`	`X_CONTENT_TYPE_OPTIONS`	The HTTP `X-Content-Type-Options` header field name.
`static`	`X_DNS_PREFETCH_CONTROL`	The HTTP header controls DNS prefetch behavior.
`static`	`X_DO_NOT_TRACK`	The HTTP `X-Do-Not-Track` header field name.
`static`	`X_DOWNLOAD_OPTIONS`	The HTTP header field name.
`static`	`X_FORWARDED_FOR`	The HTTP `X-Forwarded-For` header field name (superseded by `Forwarded`).
`static`	`X_FORWARDED_HOST`	The HTTP header field name.
`static`	`X_FORWARDED_PORT`	The HTTP header field name.
`static`	`X_FORWARDED_PROTO`	The HTTP `X-Forwarded-Proto` header field name.
`static`	`X_FRAME_OPTIONS`	The HTTP `X-Frame-Options` header field name.
`static`	`X_MOZ`	The HTTP header field name.
`static`	`X_POWERED_BY`	The HTTP `X-Powered-By` header field name.
`static`	`X_PURPOSE`	The HTTP header field name.
`static`	`X_REQUEST_ID`	The HTTP `X-Request-ID` header field name.
`static`	`X_REQUESTED_WITH`	The HTTP `X-Requested-With` header field name.
`static`	`X_USER_IP`	The HTTP `X-User-IP` header field name.
`static`	`X_WEBKIT_CSP`	The HTTP nonstandard `X-WebKit-CSP` header field name.
`static`	`X_WEBKIT_CSP_REPORT_ONLY`	The HTTP nonstandard `X-WebKit-CSP-Report-Only` header field name.
`static`	`X_XSS_PROTECTION`	The HTTP `X-XSS-Protection` header field name.

Method Summary
- Methods inherited from class java.lang.
  , , , , , , , , , ,

- Field Detail
  - CACHE_CONTROL
```
public static final  CACHE_CONTROL
```
    The HTTP Cache-Control header field name.
    
    See Also:
    
    Constant Field Values
  - CONTENT_LENGTH
```
public static final  CONTENT_LENGTH
```
    The HTTP Content-Length header field name.
    
    See Also:
    
    Constant Field Values
  - CONTENT_TYPE
```
public static final  CONTENT_TYPE
```
    The HTTP Content-Type header field name.
    
    See Also:
    
    Constant Field Values
  - DATE
```
public static final  DATE
```
    The HTTP Date header field name.
    
    See Also:
    
    Constant Field Values
  - PRAGMA
```
public static final  PRAGMA
```
    The HTTP Pragma header field name.
    
    See Also:
    
    Constant Field Values
  - VIA
```
public static final  VIA
```
    The HTTP Via header field name.
    
    See Also:
    
    Constant Field Values
  - WARNING
```
public static final  WARNING
```
    The HTTP Warning header field name.
    
    See Also:
    
    Constant Field Values
  - ACCEPT
```
public static final  ACCEPT
```
    The HTTP Accept header field name.
    
    See Also:
    
    Constant Field Values
  - ACCEPT_CHARSET
```
public static final  ACCEPT_CHARSET
```
    The HTTP Accept-Charset header field name.
    
    See Also:
    
    Constant Field Values
  - ACCEPT_ENCODING
```
public static final  ACCEPT_ENCODING
```
    The HTTP Accept-Encoding header field name.
    
    See Also:
    
    Constant Field Values
  - ACCEPT_LANGUAGE
```
public static final  ACCEPT_LANGUAGE
```
    The HTTP Accept-Language header field name.
    
    See Also:
    
    Constant Field Values
  - ACCESS_CONTROL_REQUEST_HEADERS
```
public static final  ACCESS_CONTROL_REQUEST_HEADERS
```
    The HTTP Access-Control-Request-Headers header field name.
    
    See Also:
    
    Constant Field Values
  - ACCESS_CONTROL_REQUEST_METHOD
```
public static final  ACCESS_CONTROL_REQUEST_METHOD
```
    The HTTP Access-Control-Request-Method header field name.
    
    See Also:
    
    Constant Field Values
  - AUTHORIZATION
```
public static final  AUTHORIZATION
```
    The HTTP Authorization header field name.
    
    See Also:
    
    Constant Field Values
  - CONNECTION
```
public static final  CONNECTION
```
    The HTTP Connection header field name.
    
    See Also:
    
    Constant Field Values
  - COOKIE
```
public static final  COOKIE
```
    The HTTP Cookie header field name.
    
    See Also:
    
    Constant Field Values
  - CROSS_ORIGIN_RESOURCE_POLICY
```
public static final  CROSS_ORIGIN_RESOURCE_POLICY
```
    The HTTP header field name.
    
    Since:
    
    28.0
    
    See Also:
    
    Constant Field Values
  - EARLY_DATA
```
public static final  EARLY_DATA
```
    The HTTP header field name.
    
    Since:
    
    27.0
    
    See Also:
    
    Constant Field Values
  - EXPECT
```
public static final  EXPECT
```
    The HTTP Expect header field name.
    
    See Also:
    
    Constant Field Values
  - FROM
```
public static final  FROM
```
    The HTTP From header field name.
    
    See Also:
    
    Constant Field Values
  - FORWARDED
```
public static final  FORWARDED
```
    The HTTP header field name.
    
    Since:
    
    20.0
    
    See Also:
    
    Constant Field Values
  - FOLLOW_ONLY_WHEN_PRERENDER_SHOWN
```
@Beta
public static final  FOLLOW_ONLY_WHEN_PRERENDER_SHOWN
```
    The HTTP Follow-Only-When-Prerender-Shown header field name.
    
    Since:
    
    17.0
    
    See Also:
    
    Constant Field Values
  - HOST
```
public static final  HOST
```
    The HTTP Host header field name.
    
    See Also:
    
    Constant Field Values
  - HTTP2_SETTINGS
```
public static final  HTTP2_SETTINGS
```
    The HTTP header field name.
    
    Since:
    
    24.0
    
    See Also:
    
    Constant Field Values
  - IF_MATCH
```
public static final  IF_MATCH
```
    The HTTP If-Match header field name.
    
    See Also:
    
    Constant Field Values
  - IF_MODIFIED_SINCE
```
public static final  IF_MODIFIED_SINCE
```
    The HTTP If-Modified-Since header field name.
    
    See Also:
    
    Constant Field Values
  - IF_NONE_MATCH
```
public static final  IF_NONE_MATCH
```
    The HTTP If-None-Match header field name.
    
    See Also:
    
    Constant Field Values
  - IF_RANGE
```
public static final  IF_RANGE
```
    The HTTP If-Range header field name.
    
    See Also:
    
    Constant Field Values
  - IF_UNMODIFIED_SINCE
```
public static final  IF_UNMODIFIED_SINCE
```
    The HTTP If-Unmodified-Since header field name.
    
    See Also:
    
    Constant Field Values
  - LAST_EVENT_ID
```
public static final  LAST_EVENT_ID
```
    The HTTP Last-Event-ID header field name.
    
    See Also:
    
    Constant Field Values
  - MAX_FORWARDS
```
public static final  MAX_FORWARDS
```
    The HTTP Max-Forwards header field name.
    
    See Also:
    
    Constant Field Values
  - ORIGIN
```
public static final  ORIGIN
```
    The HTTP Origin header field name.
    
    See Also:
    
    Constant Field Values
  - ORIGIN_ISOLATION
```
public static final  ORIGIN_ISOLATION
```
    The HTTP header field name.
    
    Since:
    
    30.1
    
    See Also:
    
    Constant Field Values
  - PROXY_AUTHORIZATION
```
public static final  PROXY_AUTHORIZATION
```
    The HTTP Proxy-Authorization header field name.
    
    See Also:
    
    Constant Field Values
  - RANGE
```
public static final  RANGE
```
    The HTTP Range header field name.
    
    See Also:
    
    Constant Field Values
  - REFERER
```
public static final  REFERER
```
    The HTTP Referer header field name.
    
    See Also:
    
    Constant Field Values
  - REFERRER_POLICY
```
public static final  REFERRER_POLICY
```
    The HTTP header field name.
    
    Since:
    
    23.4
    
    See Also:
    
    Constant Field Values
  - SERVICE_WORKER
```
public static final  SERVICE_WORKER
```
    The HTTP header field name.
    
    Since:
    
    20.0
    
    See Also:
    
    Constant Field Values
  - TE
```
public static final  TE
```
    The HTTP TE header field name.
    
    See Also:
    
    Constant Field Values
  - UPGRADE
```
public static final  UPGRADE
```
    The HTTP Upgrade header field name.
    
    See Also:
    
    Constant Field Values
  - UPGRADE_INSECURE_REQUESTS
```
public static final  UPGRADE_INSECURE_REQUESTS
```
    The HTTP header field name.
    
    Since:
    
    28.1
    
    See Also:
    
    Constant Field Values
  - USER_AGENT
```
public static final  USER_AGENT
```
    The HTTP User-Agent header field name.
    
    See Also:
    
    Constant Field Values
  - ACCEPT_RANGES
```
public static final  ACCEPT_RANGES
```
    The HTTP Accept-Ranges header field name.
    
    See Also:
    
    Constant Field Values
  - ACCESS_CONTROL_ALLOW_HEADERS
```
public static final  ACCESS_CONTROL_ALLOW_HEADERS
```
    The HTTP Access-Control-Allow-Headers header field name.
    
    See Also:
    
    Constant Field Values
  - ACCESS_CONTROL_ALLOW_METHODS
```
public static final  ACCESS_CONTROL_ALLOW_METHODS
```
    The HTTP Access-Control-Allow-Methods header field name.
    
    See Also:
    
    Constant Field Values
  - ACCESS_CONTROL_ALLOW_ORIGIN
```
public static final  ACCESS_CONTROL_ALLOW_ORIGIN
```
    The HTTP Access-Control-Allow-Origin header field name.
    
    See Also:
    
    Constant Field Values
  - ACCESS_CONTROL_ALLOW_CREDENTIALS
```
public static final  ACCESS_CONTROL_ALLOW_CREDENTIALS
```
    The HTTP Access-Control-Allow-Credentials header field name.
    
    See Also:
    
    Constant Field Values
  - ACCESS_CONTROL_EXPOSE_HEADERS
```
public static final  ACCESS_CONTROL_EXPOSE_HEADERS
```
    The HTTP Access-Control-Expose-Headers header field name.
    
    See Also:
    
    Constant Field Values
  - ACCESS_CONTROL_MAX_AGE
```
public static final  ACCESS_CONTROL_MAX_AGE
```
    The HTTP Access-Control-Max-Age header field name.
    
    See Also:
    
    Constant Field Values
  - AGE
```
public static final  AGE
```
    The HTTP Age header field name.
    
    See Also:
    
    Constant Field Values
  - ALLOW
```
public static final  ALLOW
```
    The HTTP Allow header field name.
    
    See Also:
    
    Constant Field Values
  - CONTENT_DISPOSITION
```
public static final  CONTENT_DISPOSITION
```
    The HTTP Content-Disposition header field name.
    
    See Also:
    
    Constant Field Values
  - CONTENT_ENCODING
```
public static final  CONTENT_ENCODING
```
    The HTTP Content-Encoding header field name.
    
    See Also:
    
    Constant Field Values
  - CONTENT_LANGUAGE
```
public static final  CONTENT_LANGUAGE
```
    The HTTP Content-Language header field name.
    
    See Also:
    
    Constant Field Values
  - CONTENT_LOCATION
```
public static final  CONTENT_LOCATION
```
    The HTTP Content-Location header field name.
    
    See Also:
    
    Constant Field Values
  - CONTENT_MD5
```
public static final  CONTENT_MD5
```
    The HTTP Content-MD5 header field name.
    
    See Also:
    
    Constant Field Values
  - CONTENT_RANGE
```
public static final  CONTENT_RANGE
```
    The HTTP Content-Range header field name.
    
    See Also:
    
    Constant Field Values
  - CONTENT_SECURITY_POLICY
```
public static final  CONTENT_SECURITY_POLICY
```
    The HTTP header field name.
    
    Since:
    
    15.0
    
    See Also:
    
    Constant Field Values
  - CONTENT_SECURITY_POLICY_REPORT_ONLY
```
public static final  CONTENT_SECURITY_POLICY_REPORT_ONLY
```
    The HTTP header field name.
    
    Since:
    
    15.0
    
    See Also:
    
    Constant Field Values
  - X_CONTENT_SECURITY_POLICY
```
public static final  X_CONTENT_SECURITY_POLICY
```
    The HTTP nonstandard X-Content-Security-Policy header field name. It was introduced in and used by the Firefox until version 23 and the Internet Explorer version 10. Please, use CONTENT_SECURITY_POLICY to pass the CSP.
    
    Since:
    
    20.0
    
    See Also:
    
    Constant Field Values
  - X_CONTENT_SECURITY_POLICY_REPORT_ONLY
```
public static final  X_CONTENT_SECURITY_POLICY_REPORT_ONLY
```
    The HTTP nonstandard X-Content-Security-Policy-Report-Only header field name. It was introduced in and used by the Firefox until version 23 and the Internet Explorer version 10. Please, use CONTENT_SECURITY_POLICY_REPORT_ONLY to pass the CSP.
    
    Since:
    
    20.0
    
    See Also:
    
    Constant Field Values
  - X_WEBKIT_CSP
```
public static final  X_WEBKIT_CSP
```
    The HTTP nonstandard X-WebKit-CSP header field name. It was introduced in and used by the Chrome until version 25. Please, use CONTENT_SECURITY_POLICY to pass the CSP.
    
    Since:
    
    20.0
    
    See Also:
    
    Constant Field Values
  - X_WEBKIT_CSP_REPORT_ONLY
```
public static final  X_WEBKIT_CSP_REPORT_ONLY
```
    The HTTP nonstandard X-WebKit-CSP-Report-Only header field name. It was introduced in and used by the Chrome until version 25. Please, use CONTENT_SECURITY_POLICY_REPORT_ONLY to pass the CSP.
    
    Since:
    
    20.0
    
    See Also:
    
    Constant Field Values
  - CROSS_ORIGIN_EMBEDDER_POLICY
```
public static final  CROSS_ORIGIN_EMBEDDER_POLICY
```
    The HTTP header field name.
    
    Since:
    
    30.0
    
    See Also:
    
    Constant Field Values
  - CROSS_ORIGIN_EMBEDDER_POLICY_REPORT_ONLY
```
public static final  CROSS_ORIGIN_EMBEDDER_POLICY_REPORT_ONLY
```
    The HTTP header field name.
    
    Since:
    
    30.0
    
    See Also:
    
    Constant Field Values
  - CROSS_ORIGIN_OPENER_POLICY
```
public static final  CROSS_ORIGIN_OPENER_POLICY
```
    The HTTP Cross-Origin-Opener-Policy header field name.
    
    Since:
    
    28.2
    
    See Also:
    
    Constant Field Values
  - ETAG
```
public static final  ETAG
```
    The HTTP ETag header field name.
    
    See Also:
    
    Constant Field Values
  - EXPIRES
```
public static final  EXPIRES
```
    The HTTP Expires header field name.
    
    See Also:
    
    Constant Field Values
  - LAST_MODIFIED
```
public static final  LAST_MODIFIED
```
    The HTTP Last-Modified header field name.
    
    See Also:
    
    Constant Field Values
  - LINK
```
public static final  LINK
```
    The HTTP Link header field name.
    
    See Also:
    
    Constant Field Values
  - LOCATION
```
public static final  LOCATION
```
    The HTTP Location header field name.
    
    See Also:
    
    Constant Field Values
  - ORIGIN_TRIAL
```
public static final  ORIGIN_TRIAL
```
    The HTTP header field name.
    
    Since:
    
    27.1
    
    See Also:
    
    Constant Field Values
  - P3P
```
public static final  P3P
```
    The HTTP P3P header field name. Limited browser support.
    
    See Also:
    
    Constant Field Values
  - PROXY_AUTHENTICATE
```
public static final  PROXY_AUTHENTICATE
```
    The HTTP Proxy-Authenticate header field name.
    
    See Also:
    
    Constant Field Values
  - REFRESH
```
public static final  REFRESH
```
    The HTTP Refresh header field name. Non-standard header supported by most browsers.
    
    See Also:
    
    Constant Field Values
  - REPORT_TO
```
public static final  REPORT_TO
```
    The HTTP header field name.
    
    Since:
    
    27.1
    
    See Also:
    
    Constant Field Values
  - RETRY_AFTER
```
public static final  RETRY_AFTER
```
    The HTTP Retry-After header field name.
    
    See Also:
    
    Constant Field Values
  - SERVER
```
public static final  SERVER
```
    The HTTP Server header field name.
    
    See Also:
    
    Constant Field Values
  - SERVER_TIMING
```
public static final  SERVER_TIMING
```
    The HTTP header field name.
    
    Since:
    
    23.6
    
    See Also:
    
    Constant Field Values
  - SERVICE_WORKER_ALLOWED
```
public static final  SERVICE_WORKER_ALLOWED
```
    The HTTP header field name.
    
    Since:
    
    20.0
    
    See Also:
    
    Constant Field Values
  - SET_COOKIE
```
public static final  SET_COOKIE
```
    The HTTP Set-Cookie header field name.
    
    See Also:
    
    Constant Field Values
  - SET_COOKIE2
```
public static final  SET_COOKIE2
```
    The HTTP Set-Cookie2 header field name.
    
    See Also:
    
    Constant Field Values
  - SOURCE_MAP
```
@Beta
public static final  SOURCE_MAP
```
    The HTTP header field name.
    
    Since:
    
    27.1
    
    See Also:
    
    Constant Field Values
  - STRICT_TRANSPORT_SECURITY
```
public static final  STRICT_TRANSPORT_SECURITY
```
    The HTTP header field name.
    
    Since:
    
    15.0
    
    See Also:
    
    Constant Field Values
  - TIMING_ALLOW_ORIGIN
```
public static final  TIMING_ALLOW_ORIGIN
```
    The HTTP header field name.
    
    Since:
    
    15.0
    
    See Also:
    
    Constant Field Values
  - TRAILER
```
public static final  TRAILER
```
    The HTTP Trailer header field name.
    
    See Also:
    
    Constant Field Values
  - TRANSFER_ENCODING
```
public static final  TRANSFER_ENCODING
```
    The HTTP Transfer-Encoding header field name.
    
    See Also:
    
    Constant Field Values
  - VARY
```
public static final  VARY
```
    The HTTP Vary header field name.
    
    See Also:
    
    Constant Field Values
  - WWW_AUTHENTICATE
```
public static final  WWW_AUTHENTICATE
```
    The HTTP WWW-Authenticate header field name.
    
    See Also:
    
    Constant Field Values
  - DNT
```
public static final  DNT
```
    The HTTP DNT header field name.
    
    See Also:
    
    Constant Field Values
  - X_CONTENT_TYPE_OPTIONS
```
public static final  X_CONTENT_TYPE_OPTIONS
```
    The HTTP X-Content-Type-Options header field name.
    
    See Also:
    
    Constant Field Values
  - X_DO_NOT_TRACK
```
public static final  X_DO_NOT_TRACK
```
    The HTTP X-Do-Not-Track header field name.
    
    See Also:
    
    Constant Field Values
  - X_FORWARDED_FOR
```
public static final  X_FORWARDED_FOR
```
    The HTTP X-Forwarded-For header field name (superseded by Forwarded).
    
    See Also:
    
    Constant Field Values
  - X_FORWARDED_PROTO
```
public static final  X_FORWARDED_PROTO
```
    The HTTP X-Forwarded-Proto header field name.
    
    See Also:
    
    Constant Field Values
  - X_FORWARDED_HOST
```
public static final  X_FORWARDED_HOST
```
    The HTTP header field name.
    
    Since:
    
    20.0
    
    See Also:
    
    Constant Field Values
  - X_FORWARDED_PORT
```
public static final  X_FORWARDED_PORT
```
    The HTTP header field name.
    
    Since:
    
    20.0
    
    See Also:
    
    Constant Field Values
  - X_FRAME_OPTIONS
```
public static final  X_FRAME_OPTIONS
```
    The HTTP X-Frame-Options header field name.
    
    See Also:
    
    Constant Field Values
  - X_POWERED_BY
```
public static final  X_POWERED_BY
```
    The HTTP X-Powered-By header field name.
    
    See Also:
    
    Constant Field Values
  - PUBLIC_KEY_PINS
```
@Beta
public static final  PUBLIC_KEY_PINS
```
    The HTTP header field name.
    
    Since:
    
    15.0
    
    See Also:
    
    Constant Field Values
  - PUBLIC_KEY_PINS_REPORT_ONLY
```
@Beta
public static final  PUBLIC_KEY_PINS_REPORT_ONLY
```
    The HTTP header field name.
    
    Since:
    
    15.0
    
    See Also:
    
    Constant Field Values
  - X_REQUEST_ID
```
public static final  X_REQUEST_ID
```
    The HTTP X-Request-ID header field name.
    
    Since:
    
    30.1
    
    See Also:
    
    Constant Field Values
  - X_REQUESTED_WITH
```
public static final  X_REQUESTED_WITH
```
    The HTTP X-Requested-With header field name.
    
    See Also:
    
    Constant Field Values
  - X_USER_IP
```
public static final  X_USER_IP
```
    The HTTP X-User-IP header field name.
    
    See Also:
    
    Constant Field Values
  - X_DOWNLOAD_OPTIONS
```
@Beta
public static final  X_DOWNLOAD_OPTIONS
```
    The HTTP header field name.
    When the new X-Download-Options header is present with the value noopen, the user is prevented from opening a file download directly; instead, they must first save the file locally.
    
    Since:
    
    24.1
    
    See Also:
    
    Constant Field Values
  - X_XSS_PROTECTION
```
public static final  X_XSS_PROTECTION
```
    The HTTP X-XSS-Protection header field name.
    
    See Also:
    
    Constant Field Values
  - X_DNS_PREFETCH_CONTROL
```
public static final  X_DNS_PREFETCH_CONTROL
```
    The HTTP header controls DNS prefetch behavior. Value can be "on" or "off". By default, DNS prefetching is "on" for HTTP pages and "off" for HTTPS pages.
    
    See Also:
    
    Constant Field Values
  - PING_FROM
```
public static final  PING_FROM
```
    The HTTP header field name.
    
    Since:
    
    19.0
    
    See Also:
    
    Constant Field Values
  - PING_TO
```
public static final  PING_TO
```
    The HTTP header field name.
    
    Since:
    
    19.0
    
    See Also:
    
    Constant Field Values
  - PURPOSE
```
public static final  PURPOSE
```
    The HTTP header field name.
    
    Since:
    
    28.0
    
    See Also:
    
    Constant Field Values
  - X_PURPOSE
```
public static final  X_PURPOSE
```
    The HTTP header field name.
    
    Since:
    
    28.0
    
    See Also:
    
    Constant Field Values
  - X_MOZ
```
public static final  X_MOZ
```
    The HTTP header field name.
    
    Since:
    
    28.0
    
    See Also:
    
    Constant Field Values
  - SEC_CH_UA
```
public static final  SEC_CH_UA
```
    The HTTP header field name.
    
    Since:
    
    30.0
    
    See Also:
    
    Constant Field Values
  - SEC_CH_UA_ARCH
```
public static final  SEC_CH_UA_ARCH
```
    The HTTP header field name.
    
    Since:
    
    30.0
    
    See Also:
    
    Constant Field Values
  - SEC_CH_UA_MODEL
```
public static final  SEC_CH_UA_MODEL
```
    The HTTP header field name.
    
    Since:
    
    30.0
    
    See Also:
    
    Constant Field Values
  - SEC_CH_UA_PLATFORM
```
public static final  SEC_CH_UA_PLATFORM
```
    The HTTP header field name.
    
    Since:
    
    30.0
    
    See Also:
    
    Constant Field Values
  - SEC_CH_UA_PLATFORM_VERSION
```
public static final  SEC_CH_UA_PLATFORM_VERSION
```
    The HTTP header field name.
    
    Since:
    
    30.0
    
    See Also:
    
    Constant Field Values
  - SEC_CH_UA_FULL_VERSION
```
public static final  SEC_CH_UA_FULL_VERSION
```
    The HTTP header field name.
    
    Since:
    
    30.0
    
    See Also:
    
    Constant Field Values
  - SEC_CH_UA_MOBILE
```
public static final  SEC_CH_UA_MOBILE
```
    The HTTP header field name.
    
    Since:
    
    30.0
    
    See Also:
    
    Constant Field Values
  - SEC_FETCH_DEST
```
public static final  SEC_FETCH_DEST
```
    The HTTP header field name.
    
    Since:
    
    27.1
    
    See Also:
    
    Constant Field Values
  - SEC_FETCH_MODE
```
public static final  SEC_FETCH_MODE
```
    The HTTP header field name.
    
    Since:
    
    27.1
    
    See Also:
    
    Constant Field Values
  - SEC_FETCH_SITE
```
public static final  SEC_FETCH_SITE
```
    The HTTP header field name.
    
    Since:
    
    27.1
    
    See Also:
    
    Constant Field Values
  - SEC_FETCH_USER
```
public static final  SEC_FETCH_USER
```
    The HTTP header field name.
    
    Since:
    
    27.1
    
    See Also:
    
    Constant Field Values
  - SEC_METADATA
```
public static final  SEC_METADATA
```
    The HTTP header field name.
    
    Since:
    
    26.0
    
    See Also:
    
    Constant Field Values
  - SEC_TOKEN_BINDING
```
public static final  SEC_TOKEN_BINDING
```
    The HTTP header field name.
    
    Since:
    
    25.1
    
    See Also:
    
    Constant Field Values
  - SEC_PROVIDED_TOKEN_BINDING_ID
```
public static final  SEC_PROVIDED_TOKEN_BINDING_ID
```
    The HTTP header field name.
    
    Since:
    
    25.1
    
    See Also:
    
    Constant Field Values
  - SEC_REFERRED_TOKEN_BINDING_ID
```
public static final  SEC_REFERRED_TOKEN_BINDING_ID
```
    The HTTP header field name.
    
    Since:
    
    25.1
    
    See Also:
    
    Constant Field Values
  - SEC_WEBSOCKET_ACCEPT
```
public static final  SEC_WEBSOCKET_ACCEPT
```
    The HTTP header field name.
    
    Since:
    
    28.0
    
    See Also:
    
    Constant Field Values
  - SEC_WEBSOCKET_EXTENSIONS
```
public static final  SEC_WEBSOCKET_EXTENSIONS
```
    The HTTP header field name.
    
    Since:
    
    28.0
    
    See Also:
    
    Constant Field Values
  - SEC_WEBSOCKET_KEY
```
public static final  SEC_WEBSOCKET_KEY
```
    The HTTP header field name.
    
    Since:
    
    28.0
    
    See Also:
    
    Constant Field Values
  - SEC_WEBSOCKET_PROTOCOL
```
public static final  SEC_WEBSOCKET_PROTOCOL
```
    The HTTP header field name.
    
    Since:
    
    28.0
    
    See Also:
    
    Constant Field Values
  - SEC_WEBSOCKET_VERSION
```
public static final  SEC_WEBSOCKET_VERSION
```
    The HTTP header field name.
    
    Since:
    
    28.0
    
    See Also:
    
    Constant Field Values
  - CDN_LOOP
```
public static final  CDN_LOOP
```
    The HTTP header field name.
    
    Since:
    
    28.0
    
    See Also:
    
    Constant Field Values

Class HttpHeaders

Nested Class Summary

Field Summary

Method Summary

Methods inherited from class java.lang.

Field Detail

CACHE_CONTROL

CONTENT_LENGTH

CONTENT_TYPE

DATE

PRAGMA

VIA

WARNING

ACCEPT

ACCEPT_CHARSET

ACCEPT_ENCODING

ACCEPT_LANGUAGE

ACCESS_CONTROL_REQUEST_HEADERS

ACCESS_CONTROL_REQUEST_METHOD

AUTHORIZATION

CONNECTION

COOKIE

CROSS_ORIGIN_RESOURCE_POLICY

EARLY_DATA

EXPECT

FROM

FORWARDED

FOLLOW_ONLY_WHEN_PRERENDER_SHOWN

HOST

HTTP2_SETTINGS

IF_MATCH

IF_MODIFIED_SINCE

IF_NONE_MATCH

IF_RANGE

IF_UNMODIFIED_SINCE

LAST_EVENT_ID

MAX_FORWARDS

ORIGIN

ORIGIN_ISOLATION

PROXY_AUTHORIZATION

RANGE

REFERER

REFERRER_POLICY

SERVICE_WORKER

TE

UPGRADE

UPGRADE_INSECURE_REQUESTS

USER_AGENT

ACCEPT_RANGES

ACCESS_CONTROL_ALLOW_HEADERS

ACCESS_CONTROL_ALLOW_METHODS

ACCESS_CONTROL_ALLOW_ORIGIN

ACCESS_CONTROL_ALLOW_CREDENTIALS

ACCESS_CONTROL_EXPOSE_HEADERS

ACCESS_CONTROL_MAX_AGE

AGE

ALLOW

CONTENT_DISPOSITION

CONTENT_ENCODING

CONTENT_LANGUAGE

CONTENT_LOCATION

CONTENT_MD5

CONTENT_RANGE

CONTENT_SECURITY_POLICY

CONTENT_SECURITY_POLICY_REPORT_ONLY

X_CONTENT_SECURITY_POLICY

X_CONTENT_SECURITY_POLICY_REPORT_ONLY

X_WEBKIT_CSP

X_WEBKIT_CSP_REPORT_ONLY

CROSS_ORIGIN_EMBEDDER_POLICY

CROSS_ORIGIN_EMBEDDER_POLICY_REPORT_ONLY

CROSS_ORIGIN_OPENER_POLICY

ETAG

EXPIRES

LAST_MODIFIED

LINK

LOCATION

ORIGIN_TRIAL

P3P

PROXY_AUTHENTICATE