Mastering Python Networking

Ryu controller with API

The example code is included in Chapter11_4.py. We will delete all the lines with manually added flows. These will be replaced by the following:

• HTTP GET /network/switches to show the DPID for all the switches
• HTTP GET /network/desc/<dpid> to query the individual switch description
• HTTP GET /network/flow/<dpid> to query the flow on the particular switch
• HTTP POST /network/flowentry/add to add a flow entry to a switch
• HTTP POST /network/flowentry/delete to delete a flow entry on a switch

To begin with, we will import the functions and classes in the ryu.app.ofctl_rest module:

from ryu.app.ofctl_rest import *

The import will include the WSGI modules included with the Ryu application. We already worked with WSGI in ...