Undertow is a flexible performant web server written in java, providing both blocking and non-blocking API’s based on NIO.
Server
<dependency>
<groupId>org.jooby</groupId>
<artifactId>jooby-undertow</artifactId>
<version>1.5.0</version>
</dependency>In order to use a web server all you have to do is add the dependency to your build system.
HTTP/2 is fully supported:
| H2 | H2C | PUSH |
| --------- | ------------- | ----- |
| Yes | Yes | Yes |
You need Java 8 Update 71 or higher (integration tests uses Java 8 Update 101).
See Java 8 releases for more details.
These are the default properties for undertow:
# undertow defaults
server.module = org.jooby.undertow.Undertow
server.http2.cleartext = true
undertow {
bufferSize = ${server.http.ResponseBufferSize}
workerThreads = ${server.threads.Max}
# Waits a set length of time for the handler to shut down. It provides a way to prevent the server
# from accepting new requests, and wait for existing requests to complete
awaitShutdown = 1000
server {
ALLOW_EQUALS_IN_COOKIE_VALUE = true
ALWAYS_SET_KEEP_ALIVE = true
# The maximum size in bytes of a http request header.
MAX_HEADER_SIZE = ${server.http.HeaderSize}
# The default maximum size of the HTTP entity body.
MAX_ENTITY_SIZE = ${server.http.MaxRequestSize}
# 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).
MAX_PARAMETERS = 1000
# The maximum number of headers that will be parsed. This is used to protect against hash
# vulnerabilities.
MAX_HEADERS = 200
# The maximum number of headers that will be parsed. This is used to protect against hash
# vulnerabilities.
MAX_COOKIES = 200
URL_CHARSET = ${application.charset}
# If this is true then the parser will decode the URL and query parameters using the selected
# character encoding (URL_CHARSET 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.
DECODE_URL = true
# 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.
IDLE_TIMEOUT = ${server.http.IdleTimeout}
}
worker {
WORKER_NAME = utow
}
socket {
BACKLOG = 1024
}
ws {
# The maximum size of a text message during parsing/generating.
MaxTextBufferSize = ${server.ws.MaxTextMessageSize}
# The maximum size of a binary message during parsing/generating.
MaxBinaryBufferSize = ${server.ws.MaxBinaryMessageSize}
# The time in ms (milliseconds) that a websocket may be idle before closing.
IdleTimeout = ${server.ws.IdleTimeout}
}
}