Jetty的http2模块

启用http2模块，执行如下命令：

java -jar $JETTY_HOME/start.jar --add-modules=http2

命令的输出，如下：

INFO  : http2           initialized in ${jetty.base}/start.d/http2.ini
INFO  : Base directory was modified

http2模块的配置文件$JETTY_BASE/start.d/http2.ini，内容如下：

# ---------------------------------------
# Module: http2
# Enables the support for the secure HTTP/2 protocol.
# ---------------------------------------
--modules=http2

## Specifies the maximum number of concurrent requests per session.
# jetty.http2.maxConcurrentStreams=128

## Specifies the initial stream receive window (client to server) in bytes.
# jetty.http2.initialStreamRecvWindow=524288

## Specifies the initial session receive window (client to server) in bytes.
# jetty.http2.initialSessionRecvWindow=1048576

## Specifies the maximum number of keys in all SETTINGS frames received by a session.
# jetty.http2.maxSettingsKeys=64

## Specifies the maximum number of bad frames and pings per second,
## after which a session is closed to avoid denial of service attacks.
# jetty.http2.rateControl.maxEventsPerSecond=50

各参数的说明，如下：

• jetty.http2.maxConcurrentStreams
  
  单个会话中允许并行的HTTP请求数量的上限值，默认值为128。
• jetty.http2.initialStreamRecvWindow
  
  流接收数据的窗口的初始容量，单位：字节，默认值为524288。
• jetty.http2.initialSessionRecvWindow
  
  会话接收数据的窗口的初始容量，单位：字节，默认值为1232896。
• jetty.http2.maxSettingsKeys
  
  在会话的SETTINGS帧中允许接收的key的数量，默认值为64。
• jetty.http2.rateControl.maxEventsPerSecond
  
  每秒允许出现的坏帧及ping的数量的上限，超出上限，则判定会话失效，以此来规避潜在的DoS攻击。
  
  默认值为50。

HTTP2要求使用安全通道传输数据，http2c模块基于非安全通道提供HTTP2协议的服务。

启用http2c模块，执行如下命令：

java -jar $JETTY_HOME/start.jar --add-modules=http2c

命令的输出，如下：

INFO  : http2c          initialized in ${jetty.base}/start.d/http2c.ini
INFO  : Base directory was modified

http2c模块的配置文件$JETTY_BASE/start.d/http2c.ini，内容如下：

# ---------------------------------------
# Module: http2c
# Enables the support for the clear-text HTTP/2 protocol.
# ---------------------------------------
--modules=http2c

## Specifies the maximum number of concurrent requests per session.
# jetty.http2c.maxConcurrentStreams=128

## Specifies the initial stream receive window (client to server) in bytes.
# jetty.http2c.initialStreamRecvWindow=524288

## Specifies the initial session receive window (client to server) in bytes.
# jetty.http2c.initialSessionRecvWindow=1232896

## Specifies the maximum number of keys in all SETTINGS frames received by a session.
# jetty.http2c.maxSettingsKeys=64

## Specifies the maximum number of bad frames and pings per second,
## after which a session is closed to avoid denial of service attacks.
# jetty.http2c.rateControl.maxEventsPerSecond=50

各参数的说明，如下：

• jetty.http2c.maxConcurrentStreams
  
  单个会话中允许并行的HTTP请求数量的上限值，默认值为128。
• jetty.http2c.initialStreamRecvWindow
  
  流接收数据的窗口的初始容量，单位：字节，默认值为524288。
• jetty.http2c.initialSessionRecvWindow
  
  会话接收数据的窗口的初始容量，单位：字节，默认值为1232896。
• jetty.http2c.maxSettingsKeys
  
  在会话的SETTINGS帧中允许接收的key的数量，默认值为64。
• jetty.http2c.rateControl.maxEventsPerSecond
  
  每秒允许出现的坏帧及ping的数量的上限，超出上限，则判定会话失效，以此来规避潜在的DoS攻击。
  
  默认值为50。

参考资料

• Nginx变更HTTP2配置过程记录
• nginx配置域名启用http2协议