tree 8a156508650656b77e03763eff9e692afa2e643c
parent f39420c7f19bc6939ca87ce262f5720a2e50940b
author Matt Spinler <spinler@us.ibm.com> 1548876148 -0600
committer Matt Spinler <spinler@us.ibm.com> 1548876541 -0600

Support any message type in /subscribe callbacks

Instead of hardcoding the possible variant types in
the PropertiesChanged and InterfacesAdded callbacks used
by the /subscribe REST operation, use convertDBusToJSON
which can convert every D-Bus type to JSON.

Tested: With the web UI running:
* Restart the State.Host service, which triggers an
  InterfacesAdded callback since the web UI subscribes
  to that.  It no longer crashes bmcweb with an sdbusplus
  error.
* Change power states, and verify the web UI sees them
  through its subscription on the CurrentHostState property.

Resolves openbmc/bmcweb#35

Change-Id: Ifa16c159d199005b42e3dfd4419bd3f9792c2d22
Signed-off-by: Matt Spinler <spinler@us.ibm.com>