How do I see the POST payload sent from Tomcat

[Aditya Kumar <0a...@gmail.com>]

I have a Java application running under Tomcat 9. One component of this
application is OpenID authentication, in which my application is a relying
party.

It sends a POST request to https://login.microsoftonline.com, but  in one
scenario I'm getting an error back from Microsoft.

I need to see exactly what was sent in the POST request including the POST
payload data. Is there a way of doing this? I tried the requestdumper
filter but I don't see anything useful.

AW: How do I see the POST payload sent from Tomcat

["Thomas Hoffmann (Speed4Trade GmbH)" <Th...@speed4trade.com.INVALID>]

Hello,

> -----Ursprüngliche Nachricht-----
> Von: Aditya Kumar <0a...@gmail.com>
> Gesendet: Donnerstag, 16. März 2023 20:29
> An: Tomcat Users List <us...@tomcat.apache.org>
> Betreff: How do I see the POST payload sent from Tomcat
> 
> I have a Java application running under Tomcat 9. One component of this
> application is OpenID authentication, in which my application is a relying party.
> 
> It sends a POST request to https://login.microsoftonline.com, but  in one
> scenario I'm getting an error back from Microsoft.
> 
> I need to see exactly what was sent in the POST request including the POST
> payload data. Is there a way of doing this? I tried the requestdumper filter but I
> don't see anything useful.

You could use javax.net.debug as explained here: https://docs.oracle.com/javase/7/docs/technotes/guides/security/jsse/ReadDebug.html  
Another option would be a reverse proxy between but it takes a bit of work.

Greetings, Thomas