The X-Qlik-Virtual-Proxy-Prefix header contains the prefix of the current virtual proxy. It is sent to the Qlik Sense Repository Service (QRS), Qlik Management Console (QMC), and Qlik Sense Engine Service (QES), but not to external modules.
The header has the following format:
X-Qlik-Virtual-Proxy-Prefix: <prefix>
If the prefix is empty, the header is included, but the value is empty:
X-Qlik-Virtual-Proxy-Prefix: