Unable to use HttpRequestAuthedData

[Vishal78]

The documentation at the below url, identifies the 5 steps listed below:

https://docs.servicenow.com/bundle/washingtondc-api-reference/page/app-store/dev_portal/API_referenc...

Generate outbound signing requests using these APIs in the following order:

1. HttpRequestData: Build the API request.
2. AuthCredential: Create a credential object or update an existing one. Use the credential to sign the request through the RequestAuthAPI class.
3. RequestAuthAPI: Sign the request and return an HttpRequestAuthedData object.
4. HttpRequestAuthedData: Get information about the signed request.
5. GlideHTTPRequest: Send the signed request.

The documentation provides code sample for steps 1 to 4, but not does not provide guidance on how to pass the HttpRequestAuthedData object from step 4 into GlideHTTPRequest in step 5 to actually make the api call . Has anyone done that ? would appreciate if someone can share sample code. Thanks.

[omenyayl]

// your sn_auth.HttpRequestData object
var httpRequestData;

// your sn_auth.HttpRequestAuthedData object
var signedRequest;

// Build RESTMessageV2
var restMessage = new sn_ws.RESTMessageV2();
restMessage.setEndpoint(httpRequestData.getEndpoint());
restMessage.setHttpMethod(httpRequestData.getHttpMethod());
// set other properties like body, headers, etc.

// sets headers like Authorization
Object.entries(signedRequest.getHeaderMap()).forEach(function(entry) {
    var headerName = entry[0];
    var headerValue = entry[1];
    restMessage.setRequestHeader(headerName, headerValue);
});

// Optionally set an AWS session token if you have one
var sessionToken;
restMessage.setRequestHeader('X-Amz-Security-Token', sessionToken);

gs.info(restMessage.execute().getBody());

[omenyayl]

Once you have an HttpRequestAuthedData object, call getHeaderMap() to get a set of calculated headers (like "Authorization", and add them to a sn_ws.RESTMessageV2 object via the setRequestHeader() method. Then, call the execute() method in sn_ws.RESTMessageV2 to send the HTTP request

var SigV4RequestUtils = Class.create();
SigV4RequestUtils.prototype = {
    initialize: function() {},

	/**
	 * @Param {string} path - The request path, i.e. /books
	 * @Param {string} method - The HTTP request method, i.e. GET
	 * @returns {sn_ws.RESTMessageV2} The rest message that can be used to send a signed request
	 */
    buildRequest: function(path, method) {
        var serviceConnectionAliasSysId = '1bfd23db14b23f43fd1dbf234fdfb2d1';
        var connectionInfoProvider = new sn_cc.ConnectionInfoProvider();
        var credentialsProvider = new sn_cc.StandardCredentialsProvider();
        var connectionInfo = connectionInfoProvider.getConnectionInfo(serviceConnectionAliasSysId);
        var authCredentials = credentialsProvider.getAuthCredentialByID(connectionInfo.getCredentialAttribute('sys_id'));

        // Build request data
        var httpRequestData = new sn_auth.HttpRequestData();
        httpRequestData.setEndpoint(connectionInfo.getAttribute('connection_url') + path);
        httpRequestData.setService('execute-api');
		httpRequestData.setRegion('us-west-2');
        httpRequestData.setHttpMethod(method);

        // Sign request
        var signingAPI = new sn_auth.RequestAuthAPI(httpRequestData, authCredentials);
        var signedRequest = signingAPI.generateAuth(signingAPI);

        // Build RESTMessageV2
        var restMessage = new sn_ws.RESTMessageV2();
        restMessage.setEndpoint(httpRequestData.getEndpoint());
        restMessage.setHttpMethod(httpRequestData.getHttpMethod());

        // If you have a session token, add it like this:
        // restMessage.setRequestHeader('X-Amz-Security-Token', sessionToken);
        
        Object.entries(signedRequest.getHeaderMap()).forEach(function(entry) {
            var headerName = entry[0];
            var headerValue = entry[1];
            restMessage.setRequestHeader(headerName, headerValue);
        });

		return restMessage;
    },

    type: 'SigV4RequestUtils'
};

gs.info(new SigV4RequestUtils().buildRequest('/books', 'GET').execute().getBody());