title: Can we inject a request parameter to a http request in apache
body: <p>We have an Apache web server which acts as a proxy to a tomcat server. </p>
  
  <p>Our web applications are hosted on the tomcat server and the external urls are mapped to the internal urls in the apache. </p>
  
  <p>The protocol used for communication between apache and tomcat is ajp13.</p>
  
  <p>We are required to send a parameter to the webapplication when the first request from a client  reaches the webapplication i.e. when the login page is requested for.</p>
  
  <p>The external url cannot be modified since it is already in use hence additional http get parameters cannot be specified.</p>
  
  <p>Is it possible to inject a request parameter in apache so that by the time request ends up on tomcat it would have this parameter?</p>