[ros-users] How to identify the subscriber or the topic name related to a callback

[Markus Bader]

Hallo Brian, Hello Jeremy

I tried using the connection header but for some reasons the topic
field "topic" does not exist!
I have: callerid, latching, md5sum, message_definition, type.
Currently I am using the Ubuntu  10.04 with the default package installation

ros::M_string connection_header = event.getConnectionHeader();
for ( ros::M_string::iterator it=connection_header.begin() ; it !=
connection_header.end(); it++ )
        std::cout << it->first << " => " << it->second << std::endl;

That code shows me ----------->

callerid => /camera0/image_proc
latching => 0
md5sum => 1b5cf7f984c229b6141ceb3a955aa18f
message_definition => # This message defines meta information for a
camera. It should be in ...........
type => sensor_msgs/CameraInfo

Any hints?

Greetings
Markus