gNMI Provider does not preserve original strings

[dasomeom]

Expected Behavior

All characters in a string leaf should encode properly in (including new lines.)

    banner.banner_text = ";\n" \
                         "----------------------\n" \
                         " EXEC process created\n" \
                         "----------------------\n" \
                         ";\n"

should result in

banner exec ;
----------------------
 EXEC process created
----------------------
;

Current Behavior

new lines are not encoded correctly

val {
    json_ietf_val: "{\"banner\":[{\"banner-name\":\"motd\",\"banner-text\":\";\\u0001--------------------\\u0016 Message of the day\\u002A--------------------\\u003F;\\u0041\"}]}"
  }

banner exec ;^A----------------------^X EXEC process created.----------------------E;G

Steps to Reproduce

Your Script

./gn-create-xr-infra-infra-cfg-20-ydk.py http://xxxx:xxxx@xxxx:xxxxx -v
2019-07-18 09:42:05,230 - ydk - INFO - gNMIServiceProvider Connected to 172.27.150.154 via Insecure Channel
2019-07-18 09:42:05,231 - ydk - INFO - Executing CRUD create operation on [Cisco-IOS-XR-infra-infra-cfg:banners]
2019-07-18 09:42:05,231 - ydk - INFO - Executing set gRPC operation 'update' on entity 'Cisco-IOS-XR-infra-infra-cfg:banners'
2019-07-18 09:42:05,234 - ydk - INFO - 
=============== Set Request Sent ================
update {
  path {
    origin: "Cisco-IOS-XR-infra-infra-cfg"
    elem {
      name: "banners"
    }
  }
  val {
    json_ietf_val: "{\"banner\":[{\"banner-name\":\"exec\",\"banner-text\":\";\\u0001----------------------\\u0018 EXEC process created\\u002E----------------------\\u0045;\\u0047\"}]}"
  }
}


2019-07-18 09:42:06,627 - ydk - INFO - 
============= Set Response Received =============
response {
  path {
    origin: "Cisco-IOS-XR-infra-infra-cfg"
    elem {
      name: "banners"
    }
  }
  message {
  }
  op: UPDATE
}
message {
}
timestamp: 1563439491166759952


2019-07-18 09:42:06,627 - ydk - INFO - Set Operation Succeeded
2019-07-18 09:42:06,628 - ydk - INFO - Operation succeeded
2019-07-18 09:42:06,628 - ydk - INFO - Disconnected from device

Logs

Enable logging and post the logs below

System Information

Python 2.7, Mac

[ygorelik]

After libyang code fix (printer_json.c):

ygorelik@ygorelik-ThinkStation-P520:~/scripts/issues$ ./test_940.py -v ssh://admin:[email protected]:57400
2019-08-26 05:58:37,327 - ydk - INFO - gNMIServiceProvider Connected to 10.30.110.85 via Insecure Channel
2019-08-26 05:58:37,328 - ydk - INFO - Executing CRUD create operation on [Cisco-IOS-XR-infra-infra-cfg:banners]
2019-08-26 05:58:37,328 - ydk - INFO - Executing set gRPC operation 'update' on entity 'Cisco-IOS-XR-infra-infra-cfg:banners'
2019-08-26 05:58:37,330 - ydk - INFO - 
=============== Set Request Sent ================
update {
  path {
    origin: "Cisco-IOS-XR-infra-infra-cfg"
    elem {
      name: "banners"
    }
  }
  val {
    json_ietf_val: "{\"banner\":[{\"banner-name\":\"motd\",\"banner-text\":\";\\u000A------------------------------------------\\u000A Message for login authentication timeout \\u000A------------------------------------------\\u000A;\\u000A\"}]}"
  }
}


2019-08-26 05:58:39,062 - ydk - INFO - 
============= Set Response Received =============
response {
  path {
    origin: "Cisco-IOS-XR-infra-infra-cfg"
    elem {
      name: "banners"
    }
  }
  message {
  }
  op: UPDATE
}
message {
}
timestamp: 1566848184474524245


2019-08-26 05:58:39,063 - ydk - INFO - Set Operation Succeeded
2019-08-26 05:58:39,063 - ydk - INFO - Operation succeeded
2019-08-26 05:58:39,064 - ydk - INFO - Executing CRUD read operation on [Cisco-IOS-XR-infra-infra-cfg:banners]
2019-08-26 05:58:39,064 - ydk - INFO - 
=============== Get Request Sent ================
path {
  origin: "Cisco-IOS-XR-infra-infra-cfg"
  elem {
    name: "banners"
  }
}
encoding: JSON_IETF


2019-08-26 05:58:39,104 - ydk - INFO - 
============= Get Response Received =============
notification {
  timestamp: 1566848184517650082
  update {
    path {
      origin: "Cisco-IOS-XR-infra-infra-cfg"
      elem {
        name: "banners"
      }
    }
    val {
      json_ietf_val: "{\"banner\":[{\"banner-name\":\"motd\",\"banner-text\":\";\\n------------------------------------------\\n Message for login authentication timeout \\n------------------------------------------\\n;\\n\"}]}"
    }
  }
}
error {
}


2019-08-26 05:58:39,104 - ydk - INFO - Get Operation Succeeded
(<ydk_.types.YLeaf object at 0x7fb0d9b2a0d8>, ';\n------------------------------------------\n Message for login authentication timeout \n------------------------------------------\n;\n')
2019-08-26 05:58:39,106 - ydk - INFO - Disconnected from device
ygorelik@ygorelik-ThinkStation-P520:~/scripts/issues$ ssh [email protected]

------------------------------------------
 Message for login authentication timeout 
------------------------------------------


Password: 


RP/0/RP0/CPU0:carreras#