Re: Using HTTP 1.1 over a configured HTTP2 Connector

[Mark Thomas]

On 01/10/2024 06:15, Anurag Sharma wrote:
Dear Tomcat Team,
I hope this message finds you well.

I am currently facing a challenge regarding the use of HTTP/1.1 for specific 
API endpoints within a servlet configured for HTTP/2. My browser defaults to 
HTTP/2, which complicates the situation as I need to proxy some APIs to a 
server that only supports HTTP/1.1.
Is there a workaround available to enforce HTTP/1.1 for these particular 
endpoints?

It isn't clear from the above which component needs to talk to which 
using what protocol.

Servlets don't care whether the request is received via HTTP/1.1 or HTTP/2.

Tomcat will happily process requests for the same servlet using HTTP/1.1 
or HTTP/2 depending on client support.

Outgoing requests from Tomcat to external services are outside of the 
control of Tomcat and are entirely an application concern.

Can you be more precise about what the problem is?

Mark



Here is out server.xml config. All request from our app is http2 protocol.


<Connector port="${tomcat.secure.port}" 
protocol="org.apache.coyote.http11.Http11NioProtocol"

                relaxedPathChars="[\\]^`{|}" relaxedQueryChars="[\\]^`{|}"

                address="${tomcat.address}" minSpareThreads="100"  maxThreads="200" 
SSLEnabled="true"

                scheme="https" secure="true" maxSwallowSize="-1" 
maxPostSize="-1">

         <UpgradeProtocol className="org.apache.coyote.http2.Http2Protocol" readTimeout="50000" 
streamReadTimeout ="-1" streamWriteTimeout="-1"

         overheadContinuationThreshold="0" overheadDataThreshold="0" 
overheadWindowUpdateThreshold="0"/>

       <SSLHostConfig protocols="TLSv1.2+TLSv1.3"

              ciphers="${tomcat.ciphers}">

             <Certificate 
certificateKeystoreFile="/var/versa/vnms/data/certs/tomcat_keystore.jks"

                          certificateKeystorePassword="${keystore.password}"

                          certificateKeyPassword="${key.password}"

                          certificateKeystoreType="PKCS12" />

         </SSLHostConfig>

     </Connector>


Thank you so much for your help.



Thanks and Regards,
Anurag Sharma



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