add channels interface

plot/app.py

@@ -51,6 +51,14 @@ def onError(ex):
     logger.error(ex)
     return jsonify({'state': 'fail'})
 
+@app.route('/plot/channels')
+def channels():
+    try:
+        logger.debug('start chratio')
+        result = get_channels()
+        return jsonify({'channels': result, 'state': 'success'})
+    except Exception as ex:
+        return onError(ex)
 
 @app.route('/plot/ch_ratio')
 def ch_ratio():