Send attachment in outbound REST integration

[Saquib Mohammed]

I am trying to send an attachment via outbound REST integration. I have created a POST HTTP method with the following query parameters - 

{
"task_number":"${task_number}",
"task_cmdb_ci":"${task_cmdb_ci}",
"attachment_list": "${attachment_list}"
} 

attachment_list is a list of object with attachment details.

In the business rule, i have the below script - 

var attachment_list = [];
if (attach.next()){
var gsa = GlideSysAttachmentInputStream(attach.sys_id.toString());
var baos = new Packages.java.io.ByteArrayOutputStream();
gsa.writeTo(baos, 0, 0);
baos.close();
var encData = GlideStringUtil.base64Encode(baos.toByteArray());
gs.log("This is encoded data of attachment " + encData);
var obj = {};
obj["encodedFile"] = encData;
obj["fileName"] = attach.file_name.toString();
obj["contentType"] = attach.content_type.toString();
attachment_list.push(obj);
}
gs.log("This is attachment_list outside if " + JSON.stringify(attachment_list));
gs.log("This is attachment_list outside if " + attachment_list);
r.setStringParameter('attachment_list', (attachment_list));
var requestBody = r.getRequestBody();
var response = r.execute();

The issue is that the attachment_list property is being sent as a string value while it needs to be sent as a list value. The payload that is being sent is in the below format:

{

    "attachment_list": "[{"encodedFile":"VGhpcyBpcyBhIHRlc3Q=","fileName":"Test1.txt","contentType":"text/plain"}]",

    "task_cmdb_ci": "UPS Hardware and Support",

    "task_number": "TASK000000042161"

}

While the attachment_list should be in the below formst - 

    "attachment_list": "[{"encodedFile":"VGhpcyBpcyBhIHRlc3Q=","fileName":"Test1.txt","contentType":"text/plain"}]",

[Saquib Mohammed]

Here is the full script for your reference. I have highlighted in bold the pain points.

try {
var r = new sn_ws.RESTMessageV2('<API name>', '<Method name>');

r.setStringParameterNoEscape('task_number',current.number);
r.setStringParameterNoEscape('task_cmdb_ci',current.cmdb_ci.getDisplayValue());

//Send Attachment - Start
var attach = new GlideRecord('sys_attachment');
attach.addQuery('table_name', 'incident_task');
attach.addQuery('table_sys_id', current.sys_id);
attach.query();
gs.log("This is number of attachment " + attach.getRowCount());
var attachment_list = [];
if (attach.next()){
var gsa = GlideSysAttachmentInputStream(attach.sys_id.toString());
var baos = new Packages.java.io.ByteArrayOutputStream();
gsa.writeTo(baos, 0, 0);
baos.close();
var encData = GlideStringUtil.base64Encode(baos.toByteArray()); 
var obj = {};
obj["encodedFile"] = encData;
obj["fileName"] = attach.file_name.toString();
obj["contentType"] = attach.content_type.toString();
attachment_list.push(obj);
}
//r.setStringParameter('attachment_list', (attachment_list));
r.setParameter('attachment_list', (attachment_list)); // This is still throwing error from API
//Send Attachment- End

var requestBody = r.getRequestBody();
gs.log("This is Request body: " + requestBody); // This is not printing the actual request payload
var r_requestBody = r.getElements();
for (var i = 0; i < r_requestBody.length; i++) {
gs.log(r_requestBody[i].getName() + ": " + r_requestBody[i].getValue()); // This is not getting logged at all
}

}

catch(ex) {
 var message = ex.message;
}
})(current, previous);

[Anish Reghu]

r.getRequestBody() returns a string representation of the request body and it's not the same as the request payload. You can try to print the request payload by using the following line instead:

gs.log("This is Request Payload: " + JSON.stringify(r.getElements()));

Kindly mark the response as Correct or Helpful.

Cheers,

Anish

[Saquib Mohammed]

This is printing - 

This is Request Payload: undefined