How to make a REST API call through a MID Server?

[Smith Johnson]

Hello all,

I have the following REST API call inside my script include.

However, instead of this call, I want to configure a call to the third system through a MID server.

At first I created a new MID Server on my instance with all the needed information (name "myMID")

How can I use this MID server inside my code?

My code is the following:

var r=new sn_ws.RESTMessageV2();

//endpoint
r.setEndpoint("aURL");   //set a url endpoint (third system's endpoint)

r.setHttpMethod("post");  //HTTP method

//set the queryParameters (the first parameter is the name of the parameter that the third system is waiting for)
r.setQueryParameter("id",id);      //id is passed from catalog client script
r.setQueryParameter("t",t); //t is passed from catalog client script

var response=r.execute();    //send the REST API call
var responseBody=response.getBody();   //receive back the response


var answer=JSON.parse(responseBody);

 ...

How can send this call from the MID server??

[Patrick DeCarl1]

//set a MID server name if one wants to run the message on MID
//r.setMIDServer('MY_MID_SERVER');

//if the message is configured to communicate through ECC queue, either
//by setting a MID server or calling executeAsync, one needs to set skip_sensor
//to true. Otherwise, one may get an intermittent error that the response body is null
//r.setEccParameter('skip_sensor', true);

[Smith Johnson]

Hey @Patrick DeCarlo , the only thing that I need is the following line??

r.setMIDServer('MY_MID_SERVER');

[Patrick DeCarl1]

Yes and No. If you have code taking data in the return you need to ignore sensor process from running. So add below line to the code. 

//r.setEccParameter('skip_sensor', true);

[Community Alums]

Hi @Smith Johnson ,

I would use the r.setMIDServer('MY_MID_SERVER')
and use always REST messages.
This way the authentication, authorization, etc. is handled by ServiceNow itself.
If you have enabled discovery - then there is a parameter skip_sensor you need to disable for this particular web call.

Cheers,
Joro

[Smith Johnson]

Hey @Patrick DeCarlo ,

I don't understand if I need to include also the method waitForResponse(),

since I am making a post call to the third system through the mid server, but I am waiting also for a response from the third system.