Software And Architecture

Introduction HTTP/3 is the 3rd major version of the HTTP protocol that powers the internet. In comparison with the previous version of http which relied on TCP, http/3 relies on QUIC. QUIC Specification published at 6th June, 2022 Developed initially at Google in 2012, had its way to IETF and public by 2022. A decade for completion and standardization !!! Are the semantics like requests, methods, status codes still the same like previous versions of http/2? yes, they still remain the same The underlying mechanisms are changed, like http/3 uses space congestion control over UDP (User Datagram protocol) Head-Of-Line Blocking (HOL) This is a performance problem where there is a queue of packets built due to the first packet that is yet to be consumed. We have browsers that have limits on the number of parallel requests that it can send to a server, when they are used up, as we anticipate, a Queue is formed for the newer requests that start accumulating the newer requests till the former

In this post, we will list down the tasks to be done for enabling the HTTP 2.0 support in spring boot applications which are hosted in Apache tomcat webserver Application Level Changes Spring boot Application Configuration Changes server.http2.enabled=true In the spring boot application's application.properties file, we have to add the above line so that Spring boot can add the support for http2 Tomcat server configuration In the tomcat web server, we should have SSL enabled before doing the below change. To start with, we have to shutdown the tomcat server instance that is running CD to the directory that has tomcat installed and cd to the bin directory and run the below command sh shutdown.sh We have add the UpgradeProtocol  which adds the respective Http2Protocol handler classname to the connector pipeline that enables support for http2.0 <UpgradeProtocol className="org.apache.coyote.http2.Http2Protocol" /> The above UpgradeProtocol can be added to the connec