HttpHeaders

java.lang.Object
- com.google.common.net.HttpHeaders

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

11.0

Nested Class Summary

Nested Classes
Modifier and Type Class and Description

static class HttpHeaders.ReferrerPolicyValues
Values for the Referrer-Policy header.

Nested Classes
Modifier and Type	Class and Description
`static class`	`HttpHeaders.ReferrerPolicyValues` Values for the `Referrer-Policy` header.

Field Summary

Fields
Modifier and Type	Field and Description
`static java.lang.String`	`ACCEPT` The HTTP `Accept` header field name.
`static java.lang.String`	`ACCEPT_CHARSET` The HTTP `Accept-Charset` header field name.
`static java.lang.String`	`ACCEPT_ENCODING` The HTTP `Accept-Encoding` header field name.
`static java.lang.String`	`ACCEPT_LANGUAGE` The HTTP `Accept-Language` header field name.
`static java.lang.String`	`ACCEPT_RANGES` The HTTP `Accept-Ranges` header field name.
`static java.lang.String`	`ACCESS_CONTROL_ALLOW_CREDENTIALS` The HTTP `Access-Control-Allow-Credentials` header field name.
`static java.lang.String`	`ACCESS_CONTROL_ALLOW_HEADERS` The HTTP `Access-Control-Allow-Headers` header field name.
`static java.lang.String`	`ACCESS_CONTROL_ALLOW_METHODS` The HTTP `Access-Control-Allow-Methods` header field name.
`static java.lang.String`	`ACCESS_CONTROL_ALLOW_ORIGIN` The HTTP `Access-Control-Allow-Origin` header field name.
`static java.lang.String`	`ACCESS_CONTROL_EXPOSE_HEADERS` The HTTP `Access-Control-Expose-Headers` header field name.
`static java.lang.String`	`ACCESS_CONTROL_MAX_AGE` The HTTP `Access-Control-Max-Age` header field name.
`static java.lang.String`	`ACCESS_CONTROL_REQUEST_HEADERS` The HTTP `Access-Control-Request-Headers` header field name.
`static java.lang.String`	`ACCESS_CONTROL_REQUEST_METHOD` The HTTP `Access-Control-Request-Method` header field name.
`static java.lang.String`	`AGE` The HTTP `Age` header field name.
`static java.lang.String`	`ALLOW` The HTTP `Allow` header field name.
`static java.lang.String`	`AUTHORIZATION` The HTTP `Authorization` header field name.
`static java.lang.String`	`CACHE_CONTROL` The HTTP `Cache-Control` header field name.
`static java.lang.String`	`CONNECTION` The HTTP `Connection` header field name.
`static java.lang.String`	`CONTENT_DISPOSITION` The HTTP `Content-Disposition` header field name.
`static java.lang.String`	`CONTENT_ENCODING` The HTTP `Content-Encoding` header field name.
`static java.lang.String`	`CONTENT_LANGUAGE` The HTTP `Content-Language` header field name.
`static java.lang.String`	`CONTENT_LENGTH` The HTTP `Content-Length` header field name.
`static java.lang.String`	`CONTENT_LOCATION` The HTTP `Content-Location` header field name.
`static java.lang.String`	`CONTENT_MD5` The HTTP `Content-MD5` header field name.
`static java.lang.String`	`CONTENT_RANGE` The HTTP `Content-Range` header field name.
`static java.lang.String`	`CONTENT_SECURITY_POLICY` The HTTP `Content-Security-Policy` header field name.
`static java.lang.String`	`CONTENT_SECURITY_POLICY_REPORT_ONLY` The HTTP `Content-Security-Policy-Report-Only` header field name.
`static java.lang.String`	`CONTENT_TYPE` The HTTP `Content-Type` header field name.
`static java.lang.String`	`COOKIE` The HTTP `Cookie` header field name.
`static java.lang.String`	`DATE` The HTTP `Date` header field name.
`static java.lang.String`	`DNT` The HTTP `DNT` header field name.
`static java.lang.String`	`ETAG` The HTTP `ETag` header field name.
`static java.lang.String`	`EXPECT` The HTTP `Expect` header field name.
`static java.lang.String`	`EXPIRES` The HTTP `Expires` header field name.
`static java.lang.String`	`FOLLOW_ONLY_WHEN_PRERENDER_SHOWN` The HTTP `Follow-Only-When-Prerender-Shown` header field name.
`static java.lang.String`	`FORWARDED` The HTTP `Forwarded` header field name.
`static java.lang.String`	`FROM` The HTTP `From` header field name.
`static java.lang.String`	`HOST` The HTTP `Host` header field name.
`static java.lang.String`	`HTTP2_SETTINGS` The HTTP `HTTP2-Settings` header field name.
`static java.lang.String`	`IF_MATCH` The HTTP `If-Match` header field name.
`static java.lang.String`	`IF_MODIFIED_SINCE` The HTTP `If-Modified-Since` header field name.
`static java.lang.String`	`IF_NONE_MATCH` The HTTP `If-None-Match` header field name.
`static java.lang.String`	`IF_RANGE` The HTTP `If-Range` header field name.
`static java.lang.String`	`IF_UNMODIFIED_SINCE` The HTTP `If-Unmodified-Since` header field name.
`static java.lang.String`	`LAST_EVENT_ID` The HTTP `Last-Event-ID` header field name.
`static java.lang.String`	`LAST_MODIFIED` The HTTP `Last-Modified` header field name.
`static java.lang.String`	`LINK` The HTTP `Link` header field name.
`static java.lang.String`	`LOCATION` The HTTP `Location` header field name.
`static java.lang.String`	`MAX_FORWARDS` The HTTP `Max-Forwards` header field name.
`static java.lang.String`	`ORIGIN` The HTTP `Origin` header field name.
`static java.lang.String`	`P3P` The HTTP `P3P` header field name.
`static java.lang.String`	`PING_FROM` The HTTP `Ping-From` header field name.
`static java.lang.String`	`PING_TO` The HTTP `Ping-To` header field name.
`static java.lang.String`	`PRAGMA` The HTTP `Pragma` header field name.
`static java.lang.String`	`PROXY_AUTHENTICATE` The HTTP `Proxy-Authenticate` header field name.
`static java.lang.String`	`PROXY_AUTHORIZATION` The HTTP `Proxy-Authorization` header field name.
`static java.lang.String`	`PUBLIC_KEY_PINS` The HTTP `Public-Key-Pins` header field name.
`static java.lang.String`	`PUBLIC_KEY_PINS_REPORT_ONLY` The HTTP `Public-Key-Pins-Report-Only` header field name.
`static java.lang.String`	`RANGE` The HTTP `Range` header field name.
`static java.lang.String`	`REFERER` The HTTP `Referer` header field name.
`static java.lang.String`	`REFERRER_POLICY` The HTTP `Referrer-Policy` header field name.
`static java.lang.String`	`REFRESH` The HTTP `Refresh` header field name.
`static java.lang.String`	`RETRY_AFTER` The HTTP `Retry-After` header field name.
`static java.lang.String`	`SERVER` The HTTP `Server` header field name.
`static java.lang.String`	`SERVER_TIMING` The HTTP `Server-Timing` header field name.
`static java.lang.String`	`SERVICE_WORKER` The HTTP `Service-Worker` header field name.
`static java.lang.String`	`SERVICE_WORKER_ALLOWED` The HTTP `Service-Worker-Allowed` header field name.
`static java.lang.String`	`SET_COOKIE` The HTTP `Set-Cookie` header field name.
`static java.lang.String`	`SET_COOKIE2` The HTTP `Set-Cookie2` header field name.
`static java.lang.String`	`STRICT_TRANSPORT_SECURITY` The HTTP `Strict-Transport-Security` header field name.
`static java.lang.String`	`TE` The HTTP `TE` header field name.
`static java.lang.String`	`TIMING_ALLOW_ORIGIN` The HTTP `Timing-Allow-Origin` header field name.
`static java.lang.String`	`TRAILER` The HTTP `Trailer` header field name.
`static java.lang.String`	`TRANSFER_ENCODING` The HTTP `Transfer-Encoding` header field name.
`static java.lang.String`	`UPGRADE` The HTTP `Upgrade` header field name.
`static java.lang.String`	`USER_AGENT` The HTTP `User-Agent` header field name.
`static java.lang.String`	`VARY` The HTTP `Vary` header field name.
`static java.lang.String`	`VIA` The HTTP `Via` header field name.
`static java.lang.String`	`WARNING` The HTTP `Warning` header field name.
`static java.lang.String`	`WWW_AUTHENTICATE` The HTTP `WWW-Authenticate` header field name.
`static java.lang.String`	`X_CONTENT_SECURITY_POLICY` The HTTP nonstandard `X-Content-Security-Policy` header field name.
`static java.lang.String`	`X_CONTENT_SECURITY_POLICY_REPORT_ONLY` The HTTP nonstandard `X-Content-Security-Policy-Report-Only` header field name.
`static java.lang.String`	`X_CONTENT_TYPE_OPTIONS` The HTTP `X-Content-Type-Options` header field name.
`static java.lang.String`	`X_DNS_PREFETCH_CONTROL` The HTTP `X-DNS-Prefetch-Control` header controls DNS prefetch behavior.
`static java.lang.String`	`X_DO_NOT_TRACK` The HTTP `X-Do-Not-Track` header field name.
`static java.lang.String`	`X_DOWNLOAD_OPTIONS` The HTTP `X-Download-Options` header field name.
`static java.lang.String`	`X_FORWARDED_FOR` The HTTP `X-Forwarded-For` header field name (superseded by `Forwarded`).
`static java.lang.String`	`X_FORWARDED_HOST` The HTTP `X-Forwarded-Host` header field name.
`static java.lang.String`	`X_FORWARDED_PORT` The HTTP `X-Forwarded-Port` header field name.
`static java.lang.String`	`X_FORWARDED_PROTO` The HTTP `X-Forwarded-Proto` header field name.
`static java.lang.String`	`X_FRAME_OPTIONS` The HTTP `X-Frame-Options` header field name.
`static java.lang.String`	`X_POWERED_BY` The HTTP `X-Powered-By` header field name.
`static java.lang.String`	`X_REQUESTED_WITH` The HTTP `X-Requested-With` header field name.
`static java.lang.String`	`X_USER_IP` The HTTP `X-User-IP` header field name.
`static java.lang.String`	`X_WEBKIT_CSP` The HTTP nonstandard `X-WebKit-CSP` header field name.
`static java.lang.String`	`X_WEBKIT_CSP_REPORT_ONLY` The HTTP nonstandard `X-WebKit-CSP-Report-Only` header field name.
`static java.lang.String`	`X_XSS_PROTECTION` The HTTP `X-XSS-Protection` header field name.

Constructor Summary

Constructors
Modifier Constructor and Description

private HttpHeaders()

Constructors
Modifier	Constructor and Description
`private`	`HttpHeaders()`

Method Summary
- Methods inherited from class java.lang.Object
  clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - CACHE_CONTROL
```
public static final java.lang.String CACHE_CONTROL
```
    The HTTP Cache-Control header field name.
    
    See Also:
    
    Constant Field Values
  - CONTENT_LENGTH
```
public static final java.lang.String CONTENT_LENGTH
```
    The HTTP Content-Length header field name.
    
    See Also:
    
    Constant Field Values
  - CONTENT_TYPE
```
public static final java.lang.String CONTENT_TYPE
```
    The HTTP Content-Type header field name.
    
    See Also:
    
    Constant Field Values
  - DATE
```
public static final java.lang.String DATE
```
    The HTTP Date header field name.
    
    See Also:
    
    Constant Field Values
  - PRAGMA
```
public static final java.lang.String PRAGMA
```
    The HTTP Pragma header field name.
    
    See Also:
    
    Constant Field Values
  - VIA
```
public static final java.lang.String VIA
```
    The HTTP Via header field name.
    
    See Also:
    
    Constant Field Values
  - WARNING
```
public static final java.lang.String WARNING
```
    The HTTP Warning header field name.
    
    See Also:
    
    Constant Field Values
  - ACCEPT
```
public static final java.lang.String ACCEPT
```
    The HTTP Accept header field name.
    
    See Also:
    
    Constant Field Values
  - ACCEPT_CHARSET
```
public static final java.lang.String ACCEPT_CHARSET
```
    The HTTP Accept-Charset header field name.
    
    See Also:
    
    Constant Field Values
  - ACCEPT_ENCODING
```
public static final java.lang.String ACCEPT_ENCODING
```
    The HTTP Accept-Encoding header field name.
    
    See Also:
    
    Constant Field Values
  - ACCEPT_LANGUAGE
```
public static final java.lang.String ACCEPT_LANGUAGE
```
    The HTTP Accept-Language header field name.
    
    See Also:
    
    Constant Field Values
  - ACCESS_CONTROL_REQUEST_HEADERS
```
public static final java.lang.String 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 java.lang.String ACCESS_CONTROL_REQUEST_METHOD
```
    The HTTP Access-Control-Request-Method header field name.
    
    See Also:
    
    Constant Field Values
  - AUTHORIZATION
```
public static final java.lang.String AUTHORIZATION
```
    The HTTP Authorization header field name.
    
    See Also:
    
    Constant Field Values
  - CONNECTION
```
public static final java.lang.String CONNECTION
```
    The HTTP Connection header field name.
    
    See Also:
    
    Constant Field Values
  - COOKIE
```
public static final java.lang.String COOKIE
```
    The HTTP Cookie header field name.
    
    See Also:
    
    Constant Field Values
  - EXPECT
```
public static final java.lang.String EXPECT
```
    The HTTP Expect header field name.
    
    See Also:
    
    Constant Field Values
  - FROM
```
public static final java.lang.String FROM
```
    The HTTP From header field name.
    
    See Also:
    
    Constant Field Values
  - FORWARDED
```
public static final java.lang.String FORWARDED
```
    The HTTP Forwarded header field name.
    
    Since:
    
    20.0
    
    See Also:
    
    Constant Field Values
  - FOLLOW_ONLY_WHEN_PRERENDER_SHOWN
```
@Beta
public static final java.lang.String 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 java.lang.String HOST
```
    The HTTP Host header field name.
    
    See Also:
    
    Constant Field Values
  - HTTP2_SETTINGS
```
public static final java.lang.String HTTP2_SETTINGS
```
    The HTTP HTTP2-Settings header field name.
    
    Since:
    
    24.0
    
    See Also:
    
    Constant Field Values
  - IF_MATCH
```
public static final java.lang.String IF_MATCH
```
    The HTTP If-Match header field name.
    
    See Also:
    
    Constant Field Values
  - IF_MODIFIED_SINCE
```
public static final java.lang.String IF_MODIFIED_SINCE
```
    The HTTP If-Modified-Since header field name.
    
    See Also:
    
    Constant Field Values
  - IF_NONE_MATCH
```
public static final java.lang.String IF_NONE_MATCH
```
    The HTTP If-None-Match header field name.
    
    See Also:
    
    Constant Field Values
  - IF_RANGE
```
public static final java.lang.String IF_RANGE
```
    The HTTP If-Range header field name.
    
    See Also:
    
    Constant Field Values
  - IF_UNMODIFIED_SINCE
```
public static final java.lang.String IF_UNMODIFIED_SINCE
```
    The HTTP If-Unmodified-Since header field name.
    
    See Also:
    
    Constant Field Values
  - LAST_EVENT_ID
```
public static final java.lang.String LAST_EVENT_ID
```
    The HTTP Last-Event-ID header field name.
    
    See Also:
    
    Constant Field Values
  - MAX_FORWARDS
```
public static final java.lang.String MAX_FORWARDS
```
    The HTTP Max-Forwards header field name.
    
    See Also:
    
    Constant Field Values
  - ORIGIN
```
public static final java.lang.String ORIGIN
```
    The HTTP Origin header field name.
    
    See Also:
    
    Constant Field Values
  - PROXY_AUTHORIZATION
```
public static final java.lang.String PROXY_AUTHORIZATION
```
    The HTTP Proxy-Authorization header field name.
    
    See Also:
    
    Constant Field Values
  - RANGE
```
public static final java.lang.String RANGE
```
    The HTTP Range header field name.
    
    See Also:
    
    Constant Field Values
  - REFERER
```
public static final java.lang.String REFERER
```
    The HTTP Referer header field name.
    
    See Also:
    
    Constant Field Values
  - REFERRER_POLICY
```
public static final java.lang.String REFERRER_POLICY
```
    The HTTP Referrer-Policy header field name.
    
    Since:
    
    23.4
    
    See Also:
    
    Constant Field Values
  - SERVICE_WORKER
```
public static final java.lang.String SERVICE_WORKER
```
    The HTTP Service-Worker header field name.
    
    See Also:
    
    Constant Field Values
  - TE
```
public static final java.lang.String TE
```
    The HTTP TE header field name.
    
    See Also:
    
    Constant Field Values
  - UPGRADE
```
public static final java.lang.String UPGRADE
```
    The HTTP Upgrade header field name.
    
    See Also:
    
    Constant Field Values
  - USER_AGENT
```
public static final java.lang.String USER_AGENT
```
    The HTTP User-Agent header field name.
    
    See Also:
    
    Constant Field Values
  - ACCEPT_RANGES
```
public static final java.lang.String ACCEPT_RANGES
```
    The HTTP Accept-Ranges header field name.
    
    See Also:
    
    Constant Field Values
  - ACCESS_CONTROL_ALLOW_HEADERS
```
public static final java.lang.String 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 java.lang.String 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 java.lang.String 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 java.lang.String 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 java.lang.String 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 java.lang.String ACCESS_CONTROL_MAX_AGE
```
    The HTTP Access-Control-Max-Age header field name.
    
    See Also:
    
    Constant Field Values
  - AGE
```
public static final java.lang.String AGE
```
    The HTTP Age header field name.
    
    See Also:
    
    Constant Field Values
  - ALLOW
```
public static final java.lang.String ALLOW
```
    The HTTP Allow header field name.
    
    See Also:
    
    Constant Field Values
  - CONTENT_DISPOSITION
```
public static final java.lang.String CONTENT_DISPOSITION
```
    The HTTP Content-Disposition header field name.
    
    See Also:
    
    Constant Field Values
  - CONTENT_ENCODING
```
public static final java.lang.String CONTENT_ENCODING
```
    The HTTP Content-Encoding header field name.
    
    See Also:
    
    Constant Field Values
  - CONTENT_LANGUAGE
```
public static final java.lang.String CONTENT_LANGUAGE
```
    The HTTP Content-Language header field name.
    
    See Also:
    
    Constant Field Values
  - CONTENT_LOCATION
```
public static final java.lang.String CONTENT_LOCATION
```
    The HTTP Content-Location header field name.
    
    See Also:
    
    Constant Field Values
  - CONTENT_MD5
```
public static final java.lang.String CONTENT_MD5
```
    The HTTP Content-MD5 header field name.
    
    See Also:
    
    Constant Field Values
  - CONTENT_RANGE
```
public static final java.lang.String CONTENT_RANGE
```
    The HTTP Content-Range header field name.
    
    See Also:
    
    Constant Field Values
  - CONTENT_SECURITY_POLICY
```
public static final java.lang.String CONTENT_SECURITY_POLICY
```
    The HTTP Content-Security-Policy header field name.
    
    Since:
    
    15.0
    
    See Also:
    
    Constant Field Values
  - CONTENT_SECURITY_POLICY_REPORT_ONLY
```
public static final java.lang.String CONTENT_SECURITY_POLICY_REPORT_ONLY
```
    The HTTP Content-Security-Policy-Report-Only header field name.
    
    Since:
    
    15.0
    
    See Also:
    
    Constant Field Values
  - X_CONTENT_SECURITY_POLICY
```
public static final java.lang.String X_CONTENT_SECURITY_POLICY
```
    The HTTP nonstandard X-Content-Security-Policy header field name. It was introduced in CSP v.1 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 java.lang.String X_CONTENT_SECURITY_POLICY_REPORT_ONLY
```
    The HTTP nonstandard X-Content-Security-Policy-Report-Only header field name. It was introduced in CSP v.1 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 java.lang.String X_WEBKIT_CSP
```
    The HTTP nonstandard X-WebKit-CSP header field name. It was introduced in CSP v.1 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 java.lang.String X_WEBKIT_CSP_REPORT_ONLY
```
    The HTTP nonstandard X-WebKit-CSP-Report-Only header field name. It was introduced in CSP v.1 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
  - ETAG
```
public static final java.lang.String ETAG
```
    The HTTP ETag header field name.
    
    See Also:
    
    Constant Field Values
  - EXPIRES
```
public static final java.lang.String EXPIRES
```
    The HTTP Expires header field name.
    
    See Also:
    
    Constant Field Values
  - LAST_MODIFIED
```
public static final java.lang.String LAST_MODIFIED
```
    The HTTP Last-Modified header field name.
    
    See Also:
    
    Constant Field Values
  - LINK
```
public static final java.lang.String LINK
```
    The HTTP Link header field name.
    
    See Also:
    
    Constant Field Values
  - LOCATION
```
public static final java.lang.String LOCATION
```
    The HTTP Location header field name.
    
    See Also:
    
    Constant Field Values
  - P3P
```
public static final java.lang.String P3P
```
    The HTTP P3P header field name. Limited browser support.
    
    See Also:
    
    Constant Field Values
  - PROXY_AUTHENTICATE
```
public static final java.lang.String PROXY_AUTHENTICATE
```
    The HTTP Proxy-Authenticate header field name.
    
    See Also:
    
    Constant Field Values
  - REFRESH
```
public static final java.lang.String REFRESH
```
    The HTTP Refresh header field name. Non-standard header supported by most browsers.
    
    See Also:
    
    Constant Field Values
  - RETRY_AFTER
```
public static final java.lang.String RETRY_AFTER
```
    The HTTP Retry-After header field name.
    
    See Also:
    
    Constant Field Values
  - SERVER
```
public static final java.lang.String SERVER
```
    The HTTP Server header field name.
    
    See Also:
    
    Constant Field Values
  - SERVER_TIMING
```
public static final java.lang.String SERVER_TIMING
```
    The HTTP Server-Timing header field name.
    
    Since:
    
    23.6
    
    See Also:
    
    Constant Field Values
  - SERVICE_WORKER_ALLOWED
```
public static final java.lang.String SERVICE_WORKER_ALLOWED
```
    The HTTP Service-Worker-Allowed header field name.
    
    Since:
    
    20.0
    
    See Also:
    
    Constant Field Values
  - SET_COOKIE
```
public static final java.lang.String SET_COOKIE
```
    The HTTP Set-Cookie header field name.
    
    See Also:
    
    Constant Field Values
  - SET_COOKIE2
```
public static final java.lang.String SET_COOKIE2
```
    The HTTP Set-Cookie2 header field name.
    
    See Also:
    
    Constant Field Values
  - STRICT_TRANSPORT_SECURITY
```
public static final java.lang.String STRICT_TRANSPORT_SECURITY
```
    The HTTP Strict-Transport-Security header field name.
    
    Since:
    
    15.0
    
    See Also:
    
    Constant Field Values
  - TIMING_ALLOW_ORIGIN
```
public static final java.lang.String TIMING_ALLOW_ORIGIN
```
    The HTTP Timing-Allow-Origin header field name.
    
    Since:
    
    15.0
    
    See Also:
    
    Constant Field Values
  - TRAILER
```
public static final java.lang.String TRAILER
```
    The HTTP Trailer header field name.
    
    See Also:
    
    Constant Field Values
  - TRANSFER_ENCODING
```
public static final java.lang.String TRANSFER_ENCODING
```
    The HTTP Transfer-Encoding header field name.
    
    See Also:
    
    Constant Field Values
  - VARY
```
public static final java.lang.String VARY
```
    The HTTP Vary header field name.
    
    See Also:
    
    Constant Field Values
  - WWW_AUTHENTICATE
```
public static final java.lang.String WWW_AUTHENTICATE
```
    The HTTP WWW-Authenticate header field name.
    
    See Also:
    
    Constant Field Values
  - DNT
```
public static final java.lang.String DNT
```
    The HTTP DNT header field name.
    
    See Also:
    
    Constant Field Values
  - X_CONTENT_TYPE_OPTIONS
```
public static final java.lang.String 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 java.lang.String X_DO_NOT_TRACK
```
    The HTTP X-Do-Not-Track header field name.
    
    See Also:
    
    Constant Field Values
  - X_FORWARDED_FOR
```
public static final java.lang.String 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 java.lang.String X_FORWARDED_PROTO
```
    The HTTP X-Forwarded-Proto header field name.
    
    See Also:
    
    Constant Field Values
  - X_FORWARDED_HOST
```
public static final java.lang.String X_FORWARDED_HOST
```
    The HTTP X-Forwarded-Host header field name.
    
    Since:
    
    20.0
    
    See Also:
    
    Constant Field Values
  - X_FORWARDED_PORT
```
public static final java.lang.String X_FORWARDED_PORT
```
    The HTTP X-Forwarded-Port header field name.
    
    Since:
    
    20.0
    
    See Also:
    
    Constant Field Values
  - X_FRAME_OPTIONS
```
public static final java.lang.String X_FRAME_OPTIONS
```
    The HTTP X-Frame-Options header field name.
    
    See Also:
    
    Constant Field Values
  - X_POWERED_BY
```
public static final java.lang.String X_POWERED_BY
```
    The HTTP X-Powered-By header field name.
    
    See Also:
    
    Constant Field Values
  - PUBLIC_KEY_PINS
```
@Beta
public static final java.lang.String PUBLIC_KEY_PINS
```
    The HTTP Public-Key-Pins header field name.
    
    Since:
    
    15.0
    
    See Also:
    
    Constant Field Values
  - PUBLIC_KEY_PINS_REPORT_ONLY
```
@Beta
public static final java.lang.String PUBLIC_KEY_PINS_REPORT_ONLY
```
    The HTTP Public-Key-Pins-Report-Only header field name.
    
    Since:
    
    15.0
    
    See Also:
    
    Constant Field Values
  - X_REQUESTED_WITH
```
public static final java.lang.String X_REQUESTED_WITH
```
    The HTTP X-Requested-With header field name.
    
    See Also:
    
    Constant Field Values
  - X_USER_IP
```
public static final java.lang.String X_USER_IP
```
    The HTTP X-User-IP header field name.
    
    See Also:
    
    Constant Field Values
  - X_DOWNLOAD_OPTIONS
```
@Beta
public static final java.lang.String X_DOWNLOAD_OPTIONS
```
    The HTTP X-Download-Options 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 java.lang.String X_XSS_PROTECTION
```
    The HTTP X-XSS-Protection header field name.
    
    See Also:
    
    Constant Field Values
  - X_DNS_PREFETCH_CONTROL
```
public static final java.lang.String X_DNS_PREFETCH_CONTROL
```
    The HTTP X-DNS-Prefetch-Control 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 java.lang.String PING_FROM
```
    The HTTP Ping-From header field name.
    
    Since:
    
    19.0
    
    See Also:
    
    Constant Field Values
  - PING_TO
```
public static final java.lang.String PING_TO
```
    The HTTP Ping-To header field name.
    
    Since:
    
    19.0
    
    See Also:
    
    Constant Field Values
- Constructor Detail
  - HttpHeaders
```
private HttpHeaders()
```

Class HttpHeaders

Nested Class Summary

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

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

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

PROXY_AUTHORIZATION

RANGE

REFERER

REFERRER_POLICY

SERVICE_WORKER

TE

UPGRADE

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

ETAG

EXPIRES

LAST_MODIFIED

LINK

LOCATION

P3P

PROXY_AUTHENTICATE

REFRESH

RETRY_AFTER

SERVER

SERVER_TIMING

SERVICE_WORKER_ALLOWED

SET_COOKIE

SET_COOKIE2