How to use Custom Header in REST API in serviceNow

[Neeraj Modi]

We have a requirement to send a custom header, key value pair in the scripted REST API and the second servicenow instance should be able to read the custom header.

I am using the below shown script but nothing I am able to achieve so far.

Any help here will be much appricicated. 

var request = new sn_ws.RESTMessageV2();
request.setEndpoint('<EndPoint>');
request.setHttpMethod('GET');

//Eg. UserName="admin", Password="admin" for this code sample.
var user = 'admin';
var password = 'admin';

request.setBasicAuth(user,password);
request.setRequestHeader("Accept","application/json");
request.setRequestHeader("Test-Header", "CustomHeaderValue");

var response = request.execute();

gs.log("getBody --> " + response.getBody()); //Getting Body
gs.log("getStatusCode --> " + response.getStatusCode()); //Getting 200
gs.log("getRequestHeader -->  " + response.getRequestHeader()); //Getting undefined
gs.log("getRequestHeaders -->  " + response.getRequestHeaders()); //Getting undefined
gs.log("getHeaders --> " + JSON.stringify(response.getHeaders())); //Getting other headers but not the custom one.
gs.log("getAllHeaders --> " + response.getAllHeaders()); //Getting other headers but not the custom one.

[Kieran Anson · Accepted solution]

You need to call getRequestHeaders() on the request variable, not the response.

gs.log("getBody --> " + response.getBody()); //Getting Body
gs.log("getStatusCode --> " + response.getStatusCode()); //Getting 200
gs.log("getRequestHeader -->  " + request.getRequestHeader('header_key_here')); //Getting undefined
gs.log("getRequestHeaders -->  " + request.getRequestHeaders()); //Getting undefined
gs.log("getHeaders --> " + JSON.stringify(request.getHeaders())); //Getting other headers but not the custom one.
gs.log("getAllHeaders --> " + response.getAllHeaders()); //Getting other headers but not the custom one.