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

```
public final class HttpHeaders
extends Object
```
Constants enumerating the HTTP headers. All headers defined in RFC1945 (HTTP/1.0), RFC2616 (HTTP/1.1), and RFC2518 (WebDAV) are listed.

Since:

4.1

Field Summary

Fields
Modifier and Type	Field	Description
`static String`	`ACCEPT`	RFC 2616 (HTTP/1.1) Section 14.1
`static String`	`ACCEPT_CHARSET`	RFC 2616 (HTTP/1.1) Section 14.2
`static String`	`ACCEPT_ENCODING`	RFC 2616 (HTTP/1.1) Section 14.3
`static String`	`ACCEPT_LANGUAGE`	RFC 2616 (HTTP/1.1) Section 14.4
`static String`	`ACCEPT_RANGES`	RFC 2616 (HTTP/1.1) Section 14.5
`static String`	`AGE`	RFC 2616 (HTTP/1.1) Section 14.6
`static String`	`ALLOW`	RFC 1945 (HTTP/1.0) Section 10.1, RFC 2616 (HTTP/1.1) Section 14.7
`static String`	`AUTHORIZATION`	RFC 1945 (HTTP/1.0) Section 10.2, RFC 2616 (HTTP/1.1) Section 14.8
`static String`	`CACHE_CONTROL`	RFC 2616 (HTTP/1.1) Section 14.9
`static String`	`CONNECTION`	RFC 2616 (HTTP/1.1) Section 14.10
`static String`	`CONTENT_ENCODING`	RFC 1945 (HTTP/1.0) Section 10.3, RFC 2616 (HTTP/1.1) Section 14.11
`static String`	`CONTENT_LANGUAGE`	RFC 2616 (HTTP/1.1) Section 14.12
`static String`	`CONTENT_LENGTH`	RFC 1945 (HTTP/1.0) Section 10.4, RFC 2616 (HTTP/1.1) Section 14.13
`static String`	`CONTENT_LOCATION`	RFC 2616 (HTTP/1.1) Section 14.14
`static String`	`CONTENT_MD5`	RFC 2616 (HTTP/1.1) Section 14.15
`static String`	`CONTENT_RANGE`	RFC 2616 (HTTP/1.1) Section 14.16
`static String`	`CONTENT_TYPE`	RFC 1945 (HTTP/1.0) Section 10.5, RFC 2616 (HTTP/1.1) Section 14.17
`static String`	`DATE`	RFC 1945 (HTTP/1.0) Section 10.6, RFC 2616 (HTTP/1.1) Section 14.18
`static String`	`DAV`	RFC 2518 (WevDAV) Section 9.1
`static String`	`DEPTH`	RFC 2518 (WevDAV) Section 9.2
`static String`	`DESTINATION`	RFC 2518 (WevDAV) Section 9.3
`static String`	`ETAG`	RFC 2616 (HTTP/1.1) Section 14.19
`static String`	`EXPECT`	RFC 2616 (HTTP/1.1) Section 14.20
`static String`	`EXPIRES`	RFC 1945 (HTTP/1.0) Section 10.7, RFC 2616 (HTTP/1.1) Section 14.21
`static String`	`FROM`	RFC 1945 (HTTP/1.0) Section 10.8, RFC 2616 (HTTP/1.1) Section 14.22
`static String`	`HOST`	RFC 2616 (HTTP/1.1) Section 14.23
`static String`	`IF`	RFC 2518 (WevDAV) Section 9.4
`static String`	`IF_MATCH`	RFC 2616 (HTTP/1.1) Section 14.24
`static String`	`IF_MODIFIED_SINCE`	RFC 1945 (HTTP/1.0) Section 10.9, RFC 2616 (HTTP/1.1) Section 14.25
`static String`	`IF_NONE_MATCH`	RFC 2616 (HTTP/1.1) Section 14.26
`static String`	`IF_RANGE`	RFC 2616 (HTTP/1.1) Section 14.27
`static String`	`IF_UNMODIFIED_SINCE`	RFC 2616 (HTTP/1.1) Section 14.28
`static String`	`LAST_MODIFIED`	RFC 1945 (HTTP/1.0) Section 10.10, RFC 2616 (HTTP/1.1) Section 14.29
`static String`	`LOCATION`	RFC 1945 (HTTP/1.0) Section 10.11, RFC 2616 (HTTP/1.1) Section 14.30
`static String`	`LOCK_TOKEN`	RFC 2518 (WevDAV) Section 9.5
`static String`	`MAX_FORWARDS`	RFC 2616 (HTTP/1.1) Section 14.31
`static String`	`OVERWRITE`	RFC 2518 (WevDAV) Section 9.6
`static String`	`PRAGMA`	RFC 1945 (HTTP/1.0) Section 10.12, RFC 2616 (HTTP/1.1) Section 14.32
`static String`	`PROXY_AUTHENTICATE`	RFC 2616 (HTTP/1.1) Section 14.33
`static String`	`PROXY_AUTHORIZATION`	RFC 2616 (HTTP/1.1) Section 14.34
`static String`	`RANGE`	RFC 2616 (HTTP/1.1) Section 14.35
`static String`	`REFERER`	RFC 1945 (HTTP/1.0) Section 10.13, RFC 2616 (HTTP/1.1) Section 14.36
`static String`	`RETRY_AFTER`	RFC 2616 (HTTP/1.1) Section 14.37
`static String`	`SERVER`	RFC 1945 (HTTP/1.0) Section 10.14, RFC 2616 (HTTP/1.1) Section 14.38
`static String`	`STATUS_URI`	RFC 2518 (WevDAV) Section 9.7
`static String`	`TE`	RFC 2616 (HTTP/1.1) Section 14.39
`static String`	`TIMEOUT`	RFC 2518 (WevDAV) Section 9.8
`static String`	`TRAILER`	RFC 2616 (HTTP/1.1) Section 14.40
`static String`	`TRANSFER_ENCODING`	RFC 2616 (HTTP/1.1) Section 14.41
`static String`	`UPGRADE`	RFC 2616 (HTTP/1.1) Section 14.42
`static String`	`USER_AGENT`	RFC 1945 (HTTP/1.0) Section 10.15, RFC 2616 (HTTP/1.1) Section 14.43
`static String`	`VARY`	RFC 2616 (HTTP/1.1) Section 14.44
`static String`	`VIA`	RFC 2616 (HTTP/1.1) Section 14.45
`static String`	`WARNING`	RFC 2616 (HTTP/1.1) Section 14.46
`static String`	`WWW_AUTHENTICATE`	RFC 1945 (HTTP/1.0) Section 10.16, RFC 2616 (HTTP/1.1) Section 14.47

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

- Field Detail
  - ACCEPT
```
public static final String ACCEPT
```
    RFC 2616 (HTTP/1.1) Section 14.1
    
    See Also:
    
    Constant Field Values
  - ACCEPT_CHARSET
```
public static final String ACCEPT_CHARSET
```
    RFC 2616 (HTTP/1.1) Section 14.2
    
    See Also:
    
    Constant Field Values
  - ACCEPT_ENCODING
```
public static final String ACCEPT_ENCODING
```
    RFC 2616 (HTTP/1.1) Section 14.3
    
    See Also:
    
    Constant Field Values
  - ACCEPT_LANGUAGE
```
public static final String ACCEPT_LANGUAGE
```
    RFC 2616 (HTTP/1.1) Section 14.4
    
    See Also:
    
    Constant Field Values
  - ACCEPT_RANGES
```
public static final String ACCEPT_RANGES
```
    RFC 2616 (HTTP/1.1) Section 14.5
    
    See Also:
    
    Constant Field Values
  - AGE
```
public static final String AGE
```
    RFC 2616 (HTTP/1.1) Section 14.6
    
    See Also:
    
    Constant Field Values
  - ALLOW
```
public static final String ALLOW
```
    RFC 1945 (HTTP/1.0) Section 10.1, RFC 2616 (HTTP/1.1) Section 14.7
    
    See Also:
    
    Constant Field Values
  - AUTHORIZATION
```
public static final String AUTHORIZATION
```
    RFC 1945 (HTTP/1.0) Section 10.2, RFC 2616 (HTTP/1.1) Section 14.8
    
    See Also:
    
    Constant Field Values
  - CACHE_CONTROL
```
public static final String CACHE_CONTROL
```
    RFC 2616 (HTTP/1.1) Section 14.9
    
    See Also:
    
    Constant Field Values
  - CONNECTION
```
public static final String CONNECTION
```
    RFC 2616 (HTTP/1.1) Section 14.10
    
    See Also:
    
    Constant Field Values
  - CONTENT_ENCODING
```
public static final String CONTENT_ENCODING
```
    RFC 1945 (HTTP/1.0) Section 10.3, RFC 2616 (HTTP/1.1) Section 14.11
    
    See Also:
    
    Constant Field Values
  - CONTENT_LANGUAGE
```
public static final String CONTENT_LANGUAGE
```
    RFC 2616 (HTTP/1.1) Section 14.12
    
    See Also:
    
    Constant Field Values
  - CONTENT_LENGTH
```
public static final String CONTENT_LENGTH
```
    RFC 1945 (HTTP/1.0) Section 10.4, RFC 2616 (HTTP/1.1) Section 14.13
    
    See Also:
    
    Constant Field Values
  - CONTENT_LOCATION
```
public static final String CONTENT_LOCATION
```
    RFC 2616 (HTTP/1.1) Section 14.14
    
    See Also:
    
    Constant Field Values
  - CONTENT_MD5
```
public static final String CONTENT_MD5
```
    RFC 2616 (HTTP/1.1) Section 14.15
    
    See Also:
    
    Constant Field Values
  - CONTENT_RANGE
```
public static final String CONTENT_RANGE
```
    RFC 2616 (HTTP/1.1) Section 14.16
    
    See Also:
    
    Constant Field Values
  - CONTENT_TYPE
```
public static final String CONTENT_TYPE
```
    RFC 1945 (HTTP/1.0) Section 10.5, RFC 2616 (HTTP/1.1) Section 14.17
    
    See Also:
    
    Constant Field Values
  - DATE
```
public static final String DATE
```
    RFC 1945 (HTTP/1.0) Section 10.6, RFC 2616 (HTTP/1.1) Section 14.18
    
    See Also:
    
    Constant Field Values
  - DAV
```
public static final String DAV
```
    RFC 2518 (WevDAV) Section 9.1
    
    See Also:
    
    Constant Field Values
  - DEPTH
```
public static final String DEPTH
```
    RFC 2518 (WevDAV) Section 9.2
    
    See Also:
    
    Constant Field Values
  - DESTINATION
```
public static final String DESTINATION
```
    RFC 2518 (WevDAV) Section 9.3
    
    See Also:
    
    Constant Field Values
  - ETAG
```
public static final String ETAG
```
    RFC 2616 (HTTP/1.1) Section 14.19
    
    See Also:
    
    Constant Field Values
  - EXPECT
```
public static final String EXPECT
```
    RFC 2616 (HTTP/1.1) Section 14.20
    
    See Also:
    
    Constant Field Values
  - EXPIRES
```
public static final String EXPIRES
```
    RFC 1945 (HTTP/1.0) Section 10.7, RFC 2616 (HTTP/1.1) Section 14.21
    
    See Also:
    
    Constant Field Values
  - FROM
```
public static final String FROM
```
    RFC 1945 (HTTP/1.0) Section 10.8, RFC 2616 (HTTP/1.1) Section 14.22
    
    See Also:
    
    Constant Field Values
  - HOST
```
public static final String HOST
```
    RFC 2616 (HTTP/1.1) Section 14.23
    
    See Also:
    
    Constant Field Values
  - IF
```
public static final String IF
```
    RFC 2518 (WevDAV) Section 9.4
    
    See Also:
    
    Constant Field Values
  - IF_MATCH
```
public static final String IF_MATCH
```
    RFC 2616 (HTTP/1.1) Section 14.24
    
    See Also:
    
    Constant Field Values
  - IF_MODIFIED_SINCE
```
public static final String IF_MODIFIED_SINCE
```
    RFC 1945 (HTTP/1.0) Section 10.9, RFC 2616 (HTTP/1.1) Section 14.25
    
    See Also:
    
    Constant Field Values
  - IF_NONE_MATCH
```
public static final String IF_NONE_MATCH
```
    RFC 2616 (HTTP/1.1) Section 14.26
    
    See Also:
    
    Constant Field Values
  - IF_RANGE
```
public static final String IF_RANGE
```
    RFC 2616 (HTTP/1.1) Section 14.27
    
    See Also:
    
    Constant Field Values
  - IF_UNMODIFIED_SINCE
```
public static final String IF_UNMODIFIED_SINCE
```
    RFC 2616 (HTTP/1.1) Section 14.28
    
    See Also:
    
    Constant Field Values
  - LAST_MODIFIED
```
public static final String LAST_MODIFIED
```
    RFC 1945 (HTTP/1.0) Section 10.10, RFC 2616 (HTTP/1.1) Section 14.29
    
    See Also:
    
    Constant Field Values
  - LOCATION
```
public static final String LOCATION
```
    RFC 1945 (HTTP/1.0) Section 10.11, RFC 2616 (HTTP/1.1) Section 14.30
    
    See Also:
    
    Constant Field Values
  - LOCK_TOKEN
```
public static final String LOCK_TOKEN
```
    RFC 2518 (WevDAV) Section 9.5
    
    See Also:
    
    Constant Field Values
  - MAX_FORWARDS
```
public static final String MAX_FORWARDS
```
    RFC 2616 (HTTP/1.1) Section 14.31
    
    See Also:
    
    Constant Field Values
  - OVERWRITE
```
public static final String OVERWRITE
```
    RFC 2518 (WevDAV) Section 9.6
    
    See Also:
    
    Constant Field Values
  - PRAGMA
```
public static final String PRAGMA
```
    RFC 1945 (HTTP/1.0) Section 10.12, RFC 2616 (HTTP/1.1) Section 14.32
    
    See Also:
    
    Constant Field Values
  - PROXY_AUTHENTICATE
```
public static final String PROXY_AUTHENTICATE
```
    RFC 2616 (HTTP/1.1) Section 14.33
    
    See Also:
    
    Constant Field Values
  - PROXY_AUTHORIZATION
```
public static final String PROXY_AUTHORIZATION
```
    RFC 2616 (HTTP/1.1) Section 14.34
    
    See Also:
    
    Constant Field Values
  - RANGE
```
public static final String RANGE
```
    RFC 2616 (HTTP/1.1) Section 14.35
    
    See Also:
    
    Constant Field Values
  - REFERER
```
public static final String REFERER
```
    RFC 1945 (HTTP/1.0) Section 10.13, RFC 2616 (HTTP/1.1) Section 14.36
    
    See Also:
    
    Constant Field Values
  - RETRY_AFTER
```
public static final String RETRY_AFTER
```
    RFC 2616 (HTTP/1.1) Section 14.37
    
    See Also:
    
    Constant Field Values
  - SERVER
```
public static final String SERVER
```
    RFC 1945 (HTTP/1.0) Section 10.14, RFC 2616 (HTTP/1.1) Section 14.38
    
    See Also:
    
    Constant Field Values
  - STATUS_URI
```
public static final String STATUS_URI
```
    RFC 2518 (WevDAV) Section 9.7
    
    See Also:
    
    Constant Field Values
  - TE
```
public static final String TE
```
    RFC 2616 (HTTP/1.1) Section 14.39
    
    See Also:
    
    Constant Field Values
  - TIMEOUT
```
public static final String TIMEOUT
```
    RFC 2518 (WevDAV) Section 9.8
    
    See Also:
    
    Constant Field Values
  - TRAILER
```
public static final String TRAILER
```
    RFC 2616 (HTTP/1.1) Section 14.40
    
    See Also:
    
    Constant Field Values
  - TRANSFER_ENCODING
```
public static final String TRANSFER_ENCODING
```
    RFC 2616 (HTTP/1.1) Section 14.41
    
    See Also:
    
    Constant Field Values
  - UPGRADE
```
public static final String UPGRADE
```
    RFC 2616 (HTTP/1.1) Section 14.42
    
    See Also:
    
    Constant Field Values
  - USER_AGENT
```
public static final String USER_AGENT
```
    RFC 1945 (HTTP/1.0) Section 10.15, RFC 2616 (HTTP/1.1) Section 14.43
    
    See Also:
    
    Constant Field Values
  - VARY
```
public static final String VARY
```
    RFC 2616 (HTTP/1.1) Section 14.44
    
    See Also:
    
    Constant Field Values
  - VIA
```
public static final String VIA
```
    RFC 2616 (HTTP/1.1) Section 14.45
    
    See Also:
    
    Constant Field Values
  - WARNING
```
public static final String WARNING
```
    RFC 2616 (HTTP/1.1) Section 14.46
    
    See Also:
    
    Constant Field Values
  - WWW_AUTHENTICATE
```
public static final String WWW_AUTHENTICATE
```
    RFC 1945 (HTTP/1.0) Section 10.16, RFC 2616 (HTTP/1.1) Section 14.47
    
    See Also:
    
    Constant Field Values

Class HttpHeaders

Field Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

ACCEPT

ACCEPT_CHARSET

ACCEPT_ENCODING

ACCEPT_LANGUAGE

ACCEPT_RANGES

AGE

ALLOW

AUTHORIZATION

CACHE_CONTROL

CONNECTION

CONTENT_ENCODING

CONTENT_LANGUAGE

CONTENT_LENGTH

CONTENT_LOCATION

CONTENT_MD5

CONTENT_RANGE

CONTENT_TYPE

DATE

DAV

DEPTH

DESTINATION

ETAG

EXPECT

EXPIRES

FROM

HOST

IF

IF_MATCH

IF_MODIFIED_SINCE

IF_NONE_MATCH

IF_RANGE

IF_UNMODIFIED_SINCE

LAST_MODIFIED

LOCATION

LOCK_TOKEN

MAX_FORWARDS

OVERWRITE

PRAGMA

PROXY_AUTHENTICATE

PROXY_AUTHORIZATION

RANGE

REFERER

RETRY_AFTER

SERVER

STATUS_URI

TE

TIMEOUT

TRAILER

TRANSFER_ENCODING

UPGRADE

USER_AGENT

VARY

VIA

WARNING

WWW_AUTHENTICATE