Add new service to retrieve the different interfaces in the ROS Network

rosapi/scripts/rosapi_node

@@ -48,6 +48,7 @@ from rosapi_msgs.srv import (
     GetROSVersion,
     GetTime,
     HasParam,
+    Interfaces,
     MessageDetails,
     NodeDetails,
     Nodes,
@@ -89,6 +90,7 @@ class Rosapi(Node):
             full_name = self.get_namespace() + "/" + self.get_name()
         params.init(full_name)
         self.create_service(Topics, "/rosapi/topics", self.get_topics)
+        self.create_service(Interfaces, "/rosapi/interfaces", self.get_interfaces)
         self.create_service(TopicsForType, "/rosapi/topics_for_type", self.get_topics_for_type)
         self.create_service(
             TopicsAndRawTypes,
@@ -137,6 +139,11 @@ class Rosapi(Node):
         response.topics, response.types = proxy.get_topics_and_types(self.globs.topics)
         return response
 
+    def get_interfaces(self, request, response):
+        """Called by the rosapi/Types service. Returns a list of all the types in the system."""
+        response.interfaces = proxy.get_interfaces()
+        return response
+
     def get_topics_for_type(self, request, response):
         """Called by the rosapi/TopicsForType service. Returns a list of all the topics that are publishing a given type"""
         response.topics = proxy.get_topics_for_type(request.type, self.globs.topics)

rosapi/src/rosapi/proxy.py

@@ -31,6 +31,7 @@
 # ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 # POSSIBILITY OF SUCH DAMAGE.
 
+from ros2interface.api import type_completer
 from ros2node.api import (
     get_node_names,
     get_publisher_info,
@@ -60,6 +61,11 @@ def get_topics(topics_glob, include_hidden=False):
     return filter_globs(topics_glob, topic_names)
 
 
+def get_interfaces():
+    """Returns a list of all the types in the ROS system"""
+    return type_completer()
+
+
 def get_topics_and_types(topics_glob, include_hidden=False):
     return get_publications_and_types(
         topics_glob, get_topic_names_and_types, include_hidden_topics=include_hidden

rosapi_msgs/CMakeLists.txt

@@ -14,6 +14,7 @@ rosidl_generate_interfaces(${PROJECT_NAME}
   srv/GetROSVersion.srv
   srv/GetTime.srv
   srv/HasParam.srv
+  srv/Interfaces.srv
   srv/MessageDetails.srv
   srv/Nodes.srv
   srv/NodeDetails.srv

rosapi_msgs/srv/Interfaces.srv

@@ -0,0 +1,2 @@
+---
+string[] interfaces