java.lang.Object
- org.apache.hc.core5.http.HttpHeaders

```
public final class HttpHeaders
extends java.lang.Object
```
Constants enumerating standard and common HTTP headers.

Since:

4.1

Field Summary

Fields
Modifier and Type	Field	Description
`static java.lang.String`	`ACCEPT`
`static java.lang.String`	`ACCEPT_CHARSET`
`static java.lang.String`	`ACCEPT_ENCODING`
`static java.lang.String`	`ACCEPT_LANGUAGE`
`static java.lang.String`	`ACCEPT_RANGES`
`static java.lang.String`	`ACCESS_CONTROL_ALLOW_CREDENTIALS`	The CORS `Access-Control-Allow-Credentials` response header field name.
`static java.lang.String`	`ACCESS_CONTROL_ALLOW_HEADERS`	The CORS `Access-Control-Allow-Headers` response header field name.
`static java.lang.String`	`ACCESS_CONTROL_ALLOW_METHODS`	The CORS `Access-Control-Allow-Methods` response header field name.
`static java.lang.String`	`ACCESS_CONTROL_ALLOW_ORIGIN`	The CORS `Access-Control-Allow-Origin` response header field name.
`static java.lang.String`	`ACCESS_CONTROL_EXPOSE_HEADERS`	The CORS `Access-Control-Expose-Headers` response header field name.
`static java.lang.String`	`ACCESS_CONTROL_MAX_AGE`	The CORS `Access-Control-Max-Age` response header field name.
`static java.lang.String`	`ACCESS_CONTROL_REQUEST_HEADERS`	The CORS `Access-Control-Request-Headers` request header field name.
`static java.lang.String`	`ACCESS_CONTROL_REQUEST_METHOD`	The CORS `Access-Control-Request-Method` request header field name.
`static java.lang.String`	`AGE`
`static java.lang.String`	`ALLOW`
`static java.lang.String`	`AUTHORIZATION`
`static java.lang.String`	`CACHE_CONTROL`
`static java.lang.String`	`CONNECTION`
`static java.lang.String`	`CONTENT_DISPOSITION`	The HTTP `Content-Disposition` header field name.
`static java.lang.String`	`CONTENT_ENCODING`
`static java.lang.String`	`CONTENT_LANGUAGE`
`static java.lang.String`	`CONTENT_LENGTH`
`static java.lang.String`	`CONTENT_LOCATION`
`static java.lang.String`	`CONTENT_MD5`
`static java.lang.String`	`CONTENT_RANGE`
`static java.lang.String`	`CONTENT_TYPE`
`static java.lang.String`	`COOKIE`	The HTTP `Cookie` header field name.
`static java.lang.String`	`DATE`
`static java.lang.String`	`DAV`
`static java.lang.String`	`DEPTH`
`static java.lang.String`	`DESTINATION`
`static java.lang.String`	`ETAG`
`static java.lang.String`	`EXPECT`
`static java.lang.String`	`EXPIRES`
`static java.lang.String`	`FROM`
`static java.lang.String`	`HOST`
`static java.lang.String`	`IF`
`static java.lang.String`	`IF_MATCH`
`static java.lang.String`	`IF_MODIFIED_SINCE`
`static java.lang.String`	`IF_NONE_MATCH`
`static java.lang.String`	`IF_RANGE`
`static java.lang.String`	`IF_UNMODIFIED_SINCE`
`static java.lang.String`	`KEEP_ALIVE`
`static java.lang.String`	`LAST_MODIFIED`
`static java.lang.String`	`LINK`	The HTTP `Link` header field name.
`static java.lang.String`	`LOCATION`
`static java.lang.String`	`LOCK_TOKEN`
`static java.lang.String`	`MAX_FORWARDS`
`static java.lang.String`	`OVERWRITE`
`static java.lang.String`	`PRAGMA`
`static java.lang.String`	`PROXY_AUTHENTICATE`
`static java.lang.String`	`PROXY_AUTHORIZATION`
`static java.lang.String`	`PROXY_CONNECTION`
`static java.lang.String`	`RANGE`
`static java.lang.String`	`REFERER`
`static java.lang.String`	`RETRY_AFTER`
`static java.lang.String`	`SERVER`
`static java.lang.String`	`SET_COOKIE`	The HTTP `Set-Cookie` header field name.
`static java.lang.String`	`STATUS_URI`
`static java.lang.String`	`TE`
`static java.lang.String`	`TIMEOUT`
`static java.lang.String`	`TRAILER`
`static java.lang.String`	`TRANSFER_ENCODING`
`static java.lang.String`	`UPGRADE`
`static java.lang.String`	`USER_AGENT`
`static java.lang.String`	`VARY`
`static java.lang.String`	`VIA`
`static java.lang.String`	`WARNING`
`static java.lang.String`	`WWW_AUTHENTICATE`

Constructor Summary

Constructors
Modifier Constructor 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
  - ACCEPT
```
public static final java.lang.String ACCEPT
```
    See Also:
    
    Constant Field Values
  - ACCEPT_CHARSET
```
public static final java.lang.String ACCEPT_CHARSET
```
    See Also:
    
    Constant Field Values
  - ACCEPT_ENCODING
```
public static final java.lang.String ACCEPT_ENCODING
```
    See Also:
    
    Constant Field Values
  - ACCEPT_LANGUAGE
```
public static final java.lang.String ACCEPT_LANGUAGE
```
    See Also:
    
    Constant Field Values
  - ACCEPT_RANGES
```
public static final java.lang.String ACCEPT_RANGES
```
    See Also:
    
    Constant Field Values
  - ACCESS_CONTROL_ALLOW_CREDENTIALS
```
public static final java.lang.String ACCESS_CONTROL_ALLOW_CREDENTIALS
```
    The CORS Access-Control-Allow-Credentials response header field name.
    
    See Also:
    
    Constant Field Values
  - ACCESS_CONTROL_ALLOW_HEADERS
```
public static final java.lang.String ACCESS_CONTROL_ALLOW_HEADERS
```
    The CORS Access-Control-Allow-Headers response header field name.
    
    See Also:
    
    Constant Field Values
  - ACCESS_CONTROL_ALLOW_METHODS
```
public static final java.lang.String ACCESS_CONTROL_ALLOW_METHODS
```
    The CORS Access-Control-Allow-Methods response header field name.
    
    See Also:
    
    Constant Field Values
  - ACCESS_CONTROL_ALLOW_ORIGIN
```
public static final java.lang.String ACCESS_CONTROL_ALLOW_ORIGIN
```
    The CORS Access-Control-Allow-Origin response header field name.
    
    See Also:
    
    Constant Field Values
  - ACCESS_CONTROL_EXPOSE_HEADERS
```
public static final java.lang.String ACCESS_CONTROL_EXPOSE_HEADERS
```
    The CORS Access-Control-Expose-Headers response header field name.
    
    See Also:
    
    Constant Field Values
  - ACCESS_CONTROL_MAX_AGE
```
public static final java.lang.String ACCESS_CONTROL_MAX_AGE
```
    The CORS Access-Control-Max-Age response header field name.
    
    See Also:
    
    Constant Field Values
  - ACCESS_CONTROL_REQUEST_HEADERS
```
public static final java.lang.String ACCESS_CONTROL_REQUEST_HEADERS
```
    The CORS Access-Control-Request-Headers request header field name.
    
    See Also:
    
    Constant Field Values
  - ACCESS_CONTROL_REQUEST_METHOD
```
public static final java.lang.String ACCESS_CONTROL_REQUEST_METHOD
```
    The CORS Access-Control-Request-Method request header field name.
    
    See Also:
    
    Constant Field Values
  - AGE
```
public static final java.lang.String AGE
```
    See Also:
    
    Constant Field Values
  - ALLOW
```
public static final java.lang.String ALLOW
```
    See Also:
    
    Constant Field Values
  - AUTHORIZATION
```
public static final java.lang.String AUTHORIZATION
```
    See Also:
    
    Constant Field Values
  - CACHE_CONTROL
```
public static final java.lang.String CACHE_CONTROL
```
    See Also:
    
    Constant Field Values
  - CONNECTION
```
public static final java.lang.String CONNECTION
```
    See Also:
    
    Constant Field Values
  - CONTENT_ENCODING
```
public static final java.lang.String CONTENT_ENCODING
```
    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_LANGUAGE
```
public static final java.lang.String CONTENT_LANGUAGE
```
    See Also:
    
    Constant Field Values
  - CONTENT_LENGTH
```
public static final java.lang.String CONTENT_LENGTH
```
    See Also:
    
    Constant Field Values
  - CONTENT_LOCATION
```
public static final java.lang.String CONTENT_LOCATION
```
    See Also:
    
    Constant Field Values
  - CONTENT_MD5
```
public static final java.lang.String CONTENT_MD5
```
    See Also:
    
    Constant Field Values
  - CONTENT_RANGE
```
public static final java.lang.String CONTENT_RANGE
```
    See Also:
    
    Constant Field Values
  - CONTENT_TYPE
```
public static final java.lang.String CONTENT_TYPE
```
    See Also:
    
    Constant Field Values
  - COOKIE
```
public static final java.lang.String COOKIE
```
    The HTTP Cookie header field name.
    
    See Also:
    
    Constant Field Values
  - DATE
```
public static final java.lang.String DATE
```
    See Also:
    
    Constant Field Values
  - DAV
```
public static final java.lang.String DAV
```
    See Also:
    
    Constant Field Values
  - DEPTH
```
public static final java.lang.String DEPTH
```
    See Also:
    
    Constant Field Values
  - DESTINATION
```
public static final java.lang.String DESTINATION
```
    See Also:
    
    Constant Field Values
  - ETAG
```
public static final java.lang.String ETAG
```
    See Also:
    
    Constant Field Values
  - EXPECT
```
public static final java.lang.String EXPECT
```
    See Also:
    
    Constant Field Values
  - EXPIRES
```
public static final java.lang.String EXPIRES
```
    See Also:
    
    Constant Field Values
  - FROM
```
public static final java.lang.String FROM
```
    See Also:
    
    Constant Field Values
  - HOST
```
public static final java.lang.String HOST
```
    See Also:
    
    Constant Field Values
  - IF
```
public static final java.lang.String IF
```
    See Also:
    
    Constant Field Values
  - IF_MATCH
```
public static final java.lang.String IF_MATCH
```
    See Also:
    
    Constant Field Values
  - IF_MODIFIED_SINCE
```
public static final java.lang.String IF_MODIFIED_SINCE
```
    See Also:
    
    Constant Field Values
  - IF_NONE_MATCH
```
public static final java.lang.String IF_NONE_MATCH
```
    See Also:
    
    Constant Field Values
  - IF_RANGE
```
public static final java.lang.String IF_RANGE
```
    See Also:
    
    Constant Field Values
  - IF_UNMODIFIED_SINCE
```
public static final java.lang.String IF_UNMODIFIED_SINCE
```
    See Also:
    
    Constant Field Values
  - KEEP_ALIVE
```
public static final java.lang.String KEEP_ALIVE
```
    See Also:
    
    Constant Field Values
  - LAST_MODIFIED
```
public static final java.lang.String LAST_MODIFIED
```
    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
```
    See Also:
    
    Constant Field Values
  - LOCK_TOKEN
```
public static final java.lang.String LOCK_TOKEN
```
    See Also:
    
    Constant Field Values
  - MAX_FORWARDS
```
public static final java.lang.String MAX_FORWARDS
```
    See Also:
    
    Constant Field Values
  - OVERWRITE
```
public static final java.lang.String OVERWRITE
```
    See Also:
    
    Constant Field Values
  - PRAGMA
```
public static final java.lang.String PRAGMA
```
    See Also:
    
    Constant Field Values
  - PROXY_AUTHENTICATE
```
public static final java.lang.String PROXY_AUTHENTICATE
```
    See Also:
    
    Constant Field Values
  - PROXY_AUTHORIZATION
```
public static final java.lang.String PROXY_AUTHORIZATION
```
    See Also:
    
    Constant Field Values
  - PROXY_CONNECTION
```
public static final java.lang.String PROXY_CONNECTION
```
    See Also:
    
    Constant Field Values
  - RANGE
```
public static final java.lang.String RANGE
```
    See Also:
    
    Constant Field Values
  - REFERER
```
public static final java.lang.String REFERER
```
    See Also:
    
    Constant Field Values
  - RETRY_AFTER
```
public static final java.lang.String RETRY_AFTER
```
    See Also:
    
    Constant Field Values
  - SERVER
```
public static final java.lang.String SERVER
```
    See Also:
    
    Constant Field Values
  - STATUS_URI
```
public static final java.lang.String STATUS_URI
```
    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
  - TE
```
public static final java.lang.String TE
```
    See Also:
    
    Constant Field Values
  - TIMEOUT
```
public static final java.lang.String TIMEOUT
```
    See Also:
    
    Constant Field Values
  - TRAILER
```
public static final java.lang.String TRAILER
```
    See Also:
    
    Constant Field Values
  - TRANSFER_ENCODING
```
public static final java.lang.String TRANSFER_ENCODING
```
    See Also:
    
    Constant Field Values
  - UPGRADE
```
public static final java.lang.String UPGRADE
```
    See Also:
    
    Constant Field Values
  - USER_AGENT
```
public static final java.lang.String USER_AGENT
```
    See Also:
    
    Constant Field Values
  - VARY
```
public static final java.lang.String VARY
```
    See Also:
    
    Constant Field Values
  - VIA
```
public static final java.lang.String VIA
```
    See Also:
    
    Constant Field Values
  - WARNING
```
public static final java.lang.String WARNING
```
    See Also:
    
    Constant Field Values
  - WWW_AUTHENTICATE
```
public static final java.lang.String WWW_AUTHENTICATE
```
    See Also:
    
    Constant Field Values
- Constructor Detail
  - HttpHeaders
```
private HttpHeaders()
```

Class HttpHeaders

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

ACCEPT

ACCEPT_CHARSET

ACCEPT_ENCODING

ACCEPT_LANGUAGE

ACCEPT_RANGES

ACCESS_CONTROL_ALLOW_CREDENTIALS

ACCESS_CONTROL_ALLOW_HEADERS

ACCESS_CONTROL_ALLOW_METHODS

ACCESS_CONTROL_ALLOW_ORIGIN

ACCESS_CONTROL_EXPOSE_HEADERS

ACCESS_CONTROL_MAX_AGE

ACCESS_CONTROL_REQUEST_HEADERS

ACCESS_CONTROL_REQUEST_METHOD

AGE

ALLOW

AUTHORIZATION

CACHE_CONTROL

CONNECTION

CONTENT_ENCODING

CONTENT_DISPOSITION

CONTENT_LANGUAGE

CONTENT_LENGTH

CONTENT_LOCATION

CONTENT_MD5

CONTENT_RANGE

CONTENT_TYPE

COOKIE

DATE

DAV

DEPTH

DESTINATION

ETAG

EXPECT

EXPIRES

FROM

HOST

IF

IF_MATCH

IF_MODIFIED_SINCE

IF_NONE_MATCH

IF_RANGE

IF_UNMODIFIED_SINCE

KEEP_ALIVE

LAST_MODIFIED

LINK

LOCATION

LOCK_TOKEN

MAX_FORWARDS

OVERWRITE

PRAGMA

PROXY_AUTHENTICATE

PROXY_AUTHORIZATION

PROXY_CONNECTION

RANGE

REFERER

RETRY_AFTER

SERVER

STATUS_URI

SET_COOKIE

TE

TIMEOUT

TRAILER

TRANSFER_ENCODING

UPGRADE

USER_AGENT

VARY

VIA

WARNING

WWW_AUTHENTICATE

Constructor Detail

HttpHeaders