Sets up a ROS node which subscribes to the topics listed in topics.txt and pushes the messages to the corresponding firebase route.

ros-firebase-pusher.py

#!/usr/bin/env python

import rospy
from std_msgs.msg import String
from firebase import firebase as fb
import os


class Listener:
  def __init__(self, topics):
    rospy.init_node('firebase', anonymous=True)
    self.firebase = fb.FirebaseApplication('https://<firebase-url>.firebaseio.com/', authentication=None)

    for topic in topics:
      rospy.Subscriber(topic, String, callback=self.callback, callback_args=topic)
    
    rospy.spin()

  def callback(self, msg, topic):
    data = {'timestamp': rospy.get_time(), 'msg': msg.data}
    print ' <' + topic + '> ' + msg.data
    self.firebase.post(topic, data)

if __name__ == '__main__':
  filename = os.path.join(os.path.dirname(__file__), 'topics.txt')
  topics = list(open(filename, 'r'))
  l = Listener(topics)