Codehaus Cargo > Articles > Configuring HTTP 2 for Tomcat 8.5 and above
 

Tomcat 8.5 and above support HTTP/2 (see https://tomcat.apache.org/tomcat-8.5-doc/config/http2.html).

In a standalone installation you need to configure an element UpgradeProtocol inside the Connector in server.xml:

server.xml 
<Connector port="8443" protocol="..." sslImplementationName="...">
    <UpgradeProtocol className="org.apache.coyote.http2.Http2Protocol"/>
...
</Connector>

These properties control the generation of the server.xml configuration file.

Remark: The file generation doesn't have any logic nor it doesn't do any validation. It's just an XML replacement and adding mechanism.

Connector attributes

Property name Java name Default Description 
cargo.tomcat.connector.protocolClass
 
TomcatPropertySet.CONNECTOR_PROTOCOL_CLASS
 
HTTP/1.1
 Sets the protocol of the connector, see https://tomcat.apache.org/tomcat-8.5-doc/config/http.html for details 
cargo.tomcat.connector.sslImplementationName
 
TomcatPropertySet.CONNECTOR_SSL_IMPLEMENTATION_NAME
 
org.apache.tomcat.util.net.openssl.OpenSSLImplementation
 The SSL implementation to be used, see https://tomcat.apache.org/tomcat-8.5-doc/config/http.html for details

UpgradeProtocol element

Property name Java name Description 
cargo.tomcat.connector.httpUpgradeProtocol
 
TomcatPropertySet.CONNECTOR_HTTP_UPGRADE_PROTOCOL
 Must be org.apache.coyote.http2.Http2Protocol, if set the <UpgradeProtocol> element will be added
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