How to correctly set setRequestBody as JSON in RESTMessageV2 POST

[dclayne]

I am working on a scoped application that sends an HTTP POST via REST using RESTMessageV2 via an asynchronous business rule.

Assume the current.partner.data_in_request field contains the following string value:

{

      "input": {

              "context": {

                      "system": {

                              "dialog_request_counter": 170,

                              "dialog_stack": {

                                      "dialog_node": ""

                              },

                              "dialog_turn_counter": 170

                      }

              },

              "text": "Hey"

      }

}

Also assume the following code snippet:

var rm = new sn_ws.RESTMessageV2();

rm.setRequestBody(current.partner.data_in_request);

I'm getting an HTTP 200 response code from the web service; however, it isn't properly reading the request body. I've tried parsing it (i.e. JSON.parse(current.partner.data_in_request)), I've tried stringifying it (i.e. JSON.stringify(current.partner.data_in_request)), and I've tried forcing string conversion (i.e. current.partner.data_in_request.toString()), but nothing seems to work.

My question is, is it possible to set the setRequestBody value as JSON in ServiceNow, or do I need to use some other structure for the request body?

[AJ63]

Did you check you POST methods HTTP Header?

[dclayne]

Hi AJ,

Yes, I am declaring the content-type as application/json; however, the web service I'm submitting the request to is not understanding the request body as I am currently submitting to it. When I submit the same JSON via SoapUI,, it understands it. Here is the complete script:

(function executeRule(current, previous /*null when async*/) {

      try{

              if(current.state == 'send_outbound_request'){

                      var rm = new sn_ws.RESTMessageV2();

                      rm.setBasicAuth(current.partner.outbound_user_name, current.partner.outbound_user_password);

                      rm.setRequestHeader('Content-Type','application/json');

                      rm.setRequestHeader('charset','utf-8');

                      rm.setHttpTimeout(current.partner.outbound_http_timeout);

                      rm.setHttpMethod(current.partner.outbound_http_method);

                      rm.setEndpoint(current.partner.outbound_endpoint);

                      rm.setRequestBody(current.partner.data_in_request);

                      var myResponse = rm.execute();

                      var myResponseAsObject = JSON.parse(myResponse.getBody());

                      current.data_in_response = JSON.stringify(myResponseAsObject,null,'\t');

                      current.state = 'prepare_outbound_response';

                      current.update();

              }

      }

      catch(err){

              current.state = 'ignore';

              current.update();

      }

})(current, previous);

[ty_roach]

I've got this same exact problem.  Any updates on how to solve this?

[RajanMurkute · Accepted solution]

You need to first convert your JSON object to sting and then set to the request-body.

Please try the following -

//==

var req = new sn_ws.RESTMessageV2();
req.setEndpoint('https://--- your end-point here');
req.setHttpMethod('POST');

//Authentication
var username = user; // your user-name
var pw = password; //your password
req.setBasicAuth(user,password);

//Set Headers
req.setRequestHeader('Content-Type','application/json');

//Create payload (JSON with key-value pair)

var myObj = {

      "input": {

              "context": {

                      "system": {

                              "dialog_request_counter": 170,

                              "dialog_stack": {

                                      "dialog_node": ""

                              },

                              "dialog_turn_counter": 170

                      }

              },

              "text": "Hey"

      }

} ;

//Convert the object to string and set it to Request Body-
req.setRequestBody(JSON.stringify(myObj));

//Execute the request
req.execute();  // if successful, it will return http status = 200 or 201, 

// Get handle on response-body
var responseBody = response.getBody();

//Get http status (Success: 200/201 or Failure: 400/401/500)
var httpStatus = response.getStatusCode();
 

// Do the rest of the processing, if httpStatus = 200 || 201

if(httpStatus == 200 || httpStatus == 201){
        //Parse response-body
        var parsedJSON = JSON.parse(responseBody);

         current.field1 = parsedJSON.something1;

         current.field2 = parsedJSON.something2 

         //.... etc.

  }

Please mark it as 'Correct', if it works.