UndertowOptions (Red Hat JBoss Enterprise Application Platform 7.1.0.Beta1 public API)

java.lang.Object
- io.undertow.UndertowOptions

public class UndertowOptions
extends Object

Author:: Stuart Douglas

Field Summary

Fields
Modifier and Type	Field and Description
`static Option<Boolean>`	`ALLOW_ENCODED_SLASH` If a request comes in with encoded / characters (i.e.
`static Option<Boolean>`	`ALLOW_EQUALS_IN_COOKIE_VALUE` If this is true then Undertow will allow non-escaped equals characters in unquoted cookie values.
`static Option<Boolean>`	`ALLOW_UNKNOWN_PROTOCOLS` If unknown protocols should be allowed.
`static Option<Boolean>`	`ALWAYS_SET_DATE` If this is true then a Date header will be added to all responses.
`static Option<Boolean>`	`ALWAYS_SET_KEEP_ALIVE` If this is true then a Connection: keep-alive header will be added to responses, even when it is not strictly required by the specification.
`static Option<Boolean>`	`BUFFER_PIPELINED_DATA` If we should buffer pipelined requests.
`static Option<Boolean>`	`DECODE_URL` If this is true then the parser will decode the URL and query parameters using the selected character encoding (UTF-8 by default).
`static int`	`DEFAULT_HTTP_HEADERS_CACHE_SIZE`
`static int`	`DEFAULT_MAX_BUFFERED_REQUEST_SIZE`
`static int`	`DEFAULT_MAX_CACHED_HEADER_SIZE`
`static long`	`DEFAULT_MAX_ENTITY_SIZE` We do not have a default upload limit
`static int`	`DEFAULT_MAX_HEADER_SIZE` The default size we allow for the HTTP header.
`static int`	`DEFAULT_MAX_HEADERS`
`static int`	`DEFAULT_MAX_PARAMETERS`
`static Option<Boolean>`	`ENABLE_CONNECTOR_STATISTICS` Deprecated.
`static Option<Boolean>`	`ENABLE_HTTP2` If we should attempt to use HTTP2 for HTTPS connections.
`static Option<Boolean>`	`ENABLE_SPDY` Deprecated.
`static Option<Boolean>`	`ENABLE_STATISTICS` If connector level statistics should be enabled.
`static Option<Integer>`	`HTTP_HEADERS_CACHE_SIZE` The maximum number of headers that are cached per connection.
`static Option<Integer>`	`HTTP2_HUFFMAN_CACHE_SIZE` Undertow keeps a LRU cache of common huffman encodings.
`static Option<Integer>`	`HTTP2_PADDING_SIZE` The maximum amount of padding to send in a HTTP/2 frame.
`static Option<Boolean>`	`HTTP2_SETTINGS_ENABLE_PUSH` If push should be enabled for this connection.
`static Option<Integer>`	`HTTP2_SETTINGS_HEADER_TABLE_SIZE` The size of the header table that is used in the encoder
`static int`	`HTTP2_SETTINGS_HEADER_TABLE_SIZE_DEFAULT`
`static Option<Integer>`	`HTTP2_SETTINGS_INITIAL_WINDOW_SIZE`
`static Option<Integer>`	`HTTP2_SETTINGS_MAX_CONCURRENT_STREAMS` The maximum number of concurrent
`static Option<Integer>`	`HTTP2_SETTINGS_MAX_FRAME_SIZE`
`static Option<Integer>`	`HTTP2_SETTINGS_MAX_HEADER_LIST_SIZE`
`static Option<Integer>`	`IDLE_TIMEOUT` The idle timeout in milliseconds after which the channel will be closed.
`static Option<Integer>`	`MAX_AJP_PACKET_SIZE` The maximum AJP packet size, default is 8192
`static Option<Integer>`	`MAX_BUFFERED_REQUEST_SIZE` Maximum size of a buffered request, in bytes
`static Option<Integer>`	`MAX_CACHED_HEADER_SIZE` The maximum size of a header name+value combo that is cached in the per connection cache.
`static Option<Integer>`	`MAX_CONCURRENT_REQUESTS_PER_CONNECTION` The maximum number of concurrent requests that will be processed at a time.
`static Option<Integer>`	`MAX_COOKIES` The maximum number of cookies that will be parsed.
`static Option<Long>`	`MAX_ENTITY_SIZE` The default maximum size of the HTTP entity body.
`static Option<Integer>`	`MAX_HEADER_SIZE` The maximum size in bytes of a http request header.
`static Option<Integer>`	`MAX_HEADERS` The maximum number of headers that will be parsed.
`static Option<Integer>`	`MAX_PARAMETERS` The maximum number of parameters that will be parsed.
`static Option<Integer>`	`MAX_QUEUED_READ_BUFFERS` The maximum number of buffers that will be used before reads are paused in framed protocols.
`static Option<Long>`	`MULTIPART_MAX_ENTITY_SIZE` The default maximum size of the HTTP entity body when using the mutiltipart parser.
`static Option<Integer>`	`NO_REQUEST_TIMEOUT` The amount of time the connection can be idle with no current requests before it is closed;
`static Option<Boolean>`	`RECORD_REQUEST_START_TIME` If this is true then Undertow will record the request start time, to allow for request time to be logged This has a small but measurable performance impact default is false
`static Option<Integer>`	`REQUEST_PARSE_TIMEOUT` The maximum allowed time of reading HTTP request in milliseconds.
`static Option<Boolean>`	`REQUIRE_HOST_HTTP11` If this is true then HTTP/1.1 requests will be failed if no host header is present.
`static Option<Boolean>`	`SSL_USER_CIPHER_SUITES_ORDER` If the SSLEngine should prefer the servers cipher version.
`static Option<String>`	`URL_CHARSET` If this is true then the parser will decode the URL and query parameters using the selected character encoding (UTF-8 by default).

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

- Field Detail
  - MAX_HEADER_SIZE
```
public static final Option<Integer> MAX_HEADER_SIZE
```
    The maximum size in bytes of a http request header.
  - DEFAULT_MAX_HEADER_SIZE
```
public static final int DEFAULT_MAX_HEADER_SIZE
```
    The default size we allow for the HTTP header.
    
    See Also:
    
    Constant Field Values
  - MAX_ENTITY_SIZE
```
public static final Option<Long> MAX_ENTITY_SIZE
```
    The default maximum size of the HTTP entity body.
  - MULTIPART_MAX_ENTITY_SIZE
```
public static final Option<Long> MULTIPART_MAX_ENTITY_SIZE
```
    The default maximum size of the HTTP entity body when using the mutiltipart parser. Generall this will be larger than MAX_ENTITY_SIZE. If this is not specified it will be the same as MAX_ENTITY_SIZE.
  - DEFAULT_MAX_ENTITY_SIZE
```
public static final long DEFAULT_MAX_ENTITY_SIZE
```
    We do not have a default upload limit
    
    See Also:
    
    Constant Field Values
  - BUFFER_PIPELINED_DATA
```
public static final Option<Boolean> BUFFER_PIPELINED_DATA
```
    If we should buffer pipelined requests. Defaults to false.
  - IDLE_TIMEOUT
```
public static final Option<Integer> IDLE_TIMEOUT
```
    The idle timeout in milliseconds after which the channel will be closed. If the underlying channel already has a read or write timeout set the smaller of the two values will be used for read/write timeouts.
  - REQUEST_PARSE_TIMEOUT
```
public static final Option<Integer> REQUEST_PARSE_TIMEOUT
```
    The maximum allowed time of reading HTTP request in milliseconds. -1 or missing value disables this functionality.
  - NO_REQUEST_TIMEOUT
```
public static final Option<Integer> NO_REQUEST_TIMEOUT
```
    The amount of time the connection can be idle with no current requests before it is closed;
  - DEFAULT_MAX_PARAMETERS
```
public static final int DEFAULT_MAX_PARAMETERS
```
    See Also:
    
    Constant Field Values
  - MAX_PARAMETERS
```
public static final Option<Integer> MAX_PARAMETERS
```
    The maximum number of parameters that will be parsed. This is used to protect against hash vulnerabilities.
    This applies to both query parameters, and to POST data, but is not cumulative (i.e. you can potentially have max parameters * 2 total parameters).
    Defaults to 1000
  - DEFAULT_MAX_HEADERS
```
public static final int DEFAULT_MAX_HEADERS
```
    See Also:
    
    Constant Field Values
  - MAX_HEADERS
```
public static final Option<Integer> MAX_HEADERS
```
    The maximum number of headers that will be parsed. This is used to protect against hash vulnerabilities.
    Defaults to 200
  - MAX_COOKIES
```
public static final Option<Integer> MAX_COOKIES
```
    The maximum number of cookies that will be parsed. This is used to protect against hash vulnerabilities.
    Defaults to 200
  - ALLOW_ENCODED_SLASH
```
public static final Option<Boolean> ALLOW_ENCODED_SLASH
```
    If a request comes in with encoded / characters (i.e. %2F), will these be decoded.
    This can cause security problems if a front end proxy does not perform the same decoding, and as a result this is disabled by default.
    Defaults to false See CVE-2007-0450
  - DECODE_URL
```
public static final Option<Boolean> DECODE_URL
```
    If this is true then the parser will decode the URL and query parameters using the selected character encoding (UTF-8 by default). If this is false they will not be decoded. This will allow a later handler to decode them into whatever charset is desired.
    Defaults to true.
  - URL_CHARSET
```
public static final Option<String> URL_CHARSET
```
    If this is true then the parser will decode the URL and query parameters using the selected character encoding (UTF-8 by default). If this is false they will not be decoded. This will allow a later handler to decode them into whatever charset is desired.
    Defaults to true.
  - ALWAYS_SET_KEEP_ALIVE
```
public static final Option<Boolean> ALWAYS_SET_KEEP_ALIVE
```
    If this is true then a Connection: keep-alive header will be added to responses, even when it is not strictly required by the specification.
    Defaults to true
  - ALWAYS_SET_DATE
```
public static final Option<Boolean> ALWAYS_SET_DATE
```
    If this is true then a Date header will be added to all responses. The HTTP spec says this header should be added to all responses, unless the server does not have an accurate clock.
    Defaults to true
  - MAX_BUFFERED_REQUEST_SIZE
```
public static final Option<Integer> MAX_BUFFERED_REQUEST_SIZE
```
    Maximum size of a buffered request, in bytes
    Requests are not usually buffered, the most common case is when performing SSL renegotiation for a POST request, and the post data must be fully buffered in order to perform the renegotiation.
    Defaults to 16384.
  - DEFAULT_MAX_BUFFERED_REQUEST_SIZE
```
public static final int DEFAULT_MAX_BUFFERED_REQUEST_SIZE
```
    See Also:
    
    Constant Field Values
  - RECORD_REQUEST_START_TIME
```
public static final Option<Boolean> RECORD_REQUEST_START_TIME
```
    If this is true then Undertow will record the request start time, to allow for request time to be logged This has a small but measurable performance impact default is false
  - ALLOW_EQUALS_IN_COOKIE_VALUE
```
public static final Option<Boolean> ALLOW_EQUALS_IN_COOKIE_VALUE
```
    If this is true then Undertow will allow non-escaped equals characters in unquoted cookie values.
    Unquoted cookie values may not contain equals characters. If present the value ends before the equals sign. The remainder of the cookie value will be dropped.
    default is false
  - ENABLE_SPDY
```
@Deprecated
public static final Option<Boolean> ENABLE_SPDY
```
    Deprecated.
    
    If we should attempt to use SPDY for HTTPS connections. SPDY is no longer supported, use HTTP/2 instead
  - ENABLE_HTTP2
```
public static final Option<Boolean> ENABLE_HTTP2
```
    If we should attempt to use HTTP2 for HTTPS connections.
  - ENABLE_STATISTICS
```
public static final Option<Boolean> ENABLE_STATISTICS
```
    If connector level statistics should be enabled. This has a slight performance impact, but allows statistics such as bytes sent/recevied to be monitored. If this is passed to the client then client statistics will be enabled.
  - ENABLE_CONNECTOR_STATISTICS
```
@Deprecated
public static final Option<Boolean> ENABLE_CONNECTOR_STATISTICS
```
    Deprecated.
    
    If connector level statistics should be enabled. This has a slight performance impact, but allows statistics such as bytes sent/recevied to be monitored.
  - ALLOW_UNKNOWN_PROTOCOLS
```
public static final Option<Boolean> ALLOW_UNKNOWN_PROTOCOLS
```
    If unknown protocols should be allowed. The known protocols are: HTTP/0.9 HTTP/1.0 HTTP/1.1 HTTP/2.0 If this is false then requests that specify any other protocol will be rejected with a 400 Defaults to false
  - HTTP2_SETTINGS_HEADER_TABLE_SIZE
```
public static final Option<Integer> HTTP2_SETTINGS_HEADER_TABLE_SIZE
```
    The size of the header table that is used in the encoder
  - HTTP2_SETTINGS_HEADER_TABLE_SIZE_DEFAULT
```
public static final int HTTP2_SETTINGS_HEADER_TABLE_SIZE_DEFAULT
```
    See Also:
    
    Constant Field Values
  - HTTP2_SETTINGS_ENABLE_PUSH
```
public static final Option<Boolean> HTTP2_SETTINGS_ENABLE_PUSH
```
    If push should be enabled for this connection.
  - HTTP2_SETTINGS_MAX_CONCURRENT_STREAMS
```
public static final Option<Integer> HTTP2_SETTINGS_MAX_CONCURRENT_STREAMS
```
    The maximum number of concurrent
  - HTTP2_SETTINGS_INITIAL_WINDOW_SIZE
```
public static final Option<Integer> HTTP2_SETTINGS_INITIAL_WINDOW_SIZE
```
  - HTTP2_SETTINGS_MAX_FRAME_SIZE
```
public static final Option<Integer> HTTP2_SETTINGS_MAX_FRAME_SIZE
```
  - HTTP2_SETTINGS_MAX_HEADER_LIST_SIZE
```
public static final Option<Integer> HTTP2_SETTINGS_MAX_HEADER_LIST_SIZE
```
  - HTTP2_PADDING_SIZE
```
public static final Option<Integer> HTTP2_PADDING_SIZE
```
    The maximum amount of padding to send in a HTTP/2 frame. Actual amount will be randomly determined, defaults to Zero.
  - HTTP2_HUFFMAN_CACHE_SIZE
```
public static final Option<Integer> HTTP2_HUFFMAN_CACHE_SIZE
```
    Undertow keeps a LRU cache of common huffman encodings. This sets the maximum size, setting this to 0 will disable the caching.
  - MAX_CONCURRENT_REQUESTS_PER_CONNECTION
```
public static final Option<Integer> MAX_CONCURRENT_REQUESTS_PER_CONNECTION
```
    The maximum number of concurrent requests that will be processed at a time. This differs from max concurrent streams in that it is not sent to the remote client. If the number of pending requests exceeds this number then requests will be queued, the difference between this and max concurrent streams determins the maximum number of requests that will be queued. Queued requests are processed by a priority queue, rather than a FIFO based queue, using HTTP2 stream priority. If this number is smaller than or equal to zero then max concurrent streams determines the maximum number of streams that can be run.
  - MAX_QUEUED_READ_BUFFERS
```
public static final Option<Integer> MAX_QUEUED_READ_BUFFERS
```
    The maximum number of buffers that will be used before reads are paused in framed protocols. Defaults to 10
  - MAX_AJP_PACKET_SIZE
```
public static final Option<Integer> MAX_AJP_PACKET_SIZE
```
    The maximum AJP packet size, default is 8192
  - REQUIRE_HOST_HTTP11
```
public static final Option<Boolean> REQUIRE_HOST_HTTP11
```
    If this is true then HTTP/1.1 requests will be failed if no host header is present.
  - DEFAULT_MAX_CACHED_HEADER_SIZE
```
public static final int DEFAULT_MAX_CACHED_HEADER_SIZE
```
    See Also:
    
    Constant Field Values
  - MAX_CACHED_HEADER_SIZE
```
public static final Option<Integer> MAX_CACHED_HEADER_SIZE
```
    The maximum size of a header name+value combo that is cached in the per connection cache. Defaults to 150
  - DEFAULT_HTTP_HEADERS_CACHE_SIZE
```
public static final int DEFAULT_HTTP_HEADERS_CACHE_SIZE
```
    See Also:
    
    Constant Field Values
  - HTTP_HEADERS_CACHE_SIZE
```
public static final Option<Integer> HTTP_HEADERS_CACHE_SIZE
```
    The maximum number of headers that are cached per connection. Defaults to 15. If this is set to zero the cache is disabled.
  - SSL_USER_CIPHER_SUITES_ORDER
```
public static final Option<Boolean> SSL_USER_CIPHER_SUITES_ORDER
```
    If the SSLEngine should prefer the servers cipher version. Only applicable on JDK8+.

Class UndertowOptions

Field Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

MAX_HEADER_SIZE

DEFAULT_MAX_HEADER_SIZE

MAX_ENTITY_SIZE

MULTIPART_MAX_ENTITY_SIZE

DEFAULT_MAX_ENTITY_SIZE

BUFFER_PIPELINED_DATA

IDLE_TIMEOUT

REQUEST_PARSE_TIMEOUT

NO_REQUEST_TIMEOUT

DEFAULT_MAX_PARAMETERS

MAX_PARAMETERS

DEFAULT_MAX_HEADERS

MAX_HEADERS

MAX_COOKIES

ALLOW_ENCODED_SLASH

DECODE_URL

URL_CHARSET

ALWAYS_SET_KEEP_ALIVE

ALWAYS_SET_DATE

MAX_BUFFERED_REQUEST_SIZE

DEFAULT_MAX_BUFFERED_REQUEST_SIZE

RECORD_REQUEST_START_TIME

ALLOW_EQUALS_IN_COOKIE_VALUE

ENABLE_SPDY

ENABLE_HTTP2

ENABLE_STATISTICS

ENABLE_CONNECTOR_STATISTICS

ALLOW_UNKNOWN_PROTOCOLS

HTTP2_SETTINGS_HEADER_TABLE_SIZE

HTTP2_SETTINGS_HEADER_TABLE_SIZE_DEFAULT

HTTP2_SETTINGS_ENABLE_PUSH

HTTP2_SETTINGS_MAX_CONCURRENT_STREAMS

HTTP2_SETTINGS_INITIAL_WINDOW_SIZE

HTTP2_SETTINGS_MAX_FRAME_SIZE

HTTP2_SETTINGS_MAX_HEADER_LIST_SIZE

HTTP2_PADDING_SIZE

HTTP2_HUFFMAN_CACHE_SIZE

MAX_CONCURRENT_REQUESTS_PER_CONNECTION

MAX_QUEUED_READ_BUFFERS

MAX_AJP_PACKET_SIZE

REQUIRE_HOST_HTTP11

DEFAULT_MAX_CACHED_HEADER_SIZE

MAX_CACHED_HEADER_SIZE

DEFAULT_HTTP_HEADERS_CACHE_SIZE

HTTP_HEADERS_CACHE_SIZE

SSL_USER_CIPHER_SUITES_ORDER