Unexpected behavior from remote host: Unbuffered entity enclosing request can not be repeated.

[adityadev]

I get the above error when running the following code:

var r = new sn_ws.RESTMessageV2();
r.setHttpMethod('post');
r.setBasicAuth('<username>', '<password>');
r.setEndpoint('<instance>/api/now/attachment/file');   
r.setRequestBodyFromAttachment('<attachment sys_id from local instance>');
var response = r.execute();
gs.info(response.getStatusCode());
gs.info(response.getBody());

Output:

Unexpected behavior from remote host: Unbuffered entity enclosing request can not be repeated.
Response:
Status Code: 0
Body:

I'm essentially trying to upload attachments from local records to another instance.

Any suggestions/corrections? I'm unable to understand the error and am fairly new to developing on ServiceNow

[Aakash Shah4]

Hi AdityaDev,

Based on your requirement you can go through these links. I hope you find them helpful

RESTMessageV2 - setRequestBodyFromAttachment(String attachmentSysId)

https://docs.servicenow.com/bundle/istanbul-servicenow-platform/page/app-store/dev_portal/API_refere...

How to retrieve an attachment from service now via SOAP Web Service

Copying attachment from one instance to another+

[adityadev · Accepted solution]

Thanks aakashshah!

Your links were very useful and while they did not directly get me the answer I needed, I made a bunch of changes that got my code working. Some of the important ones that might have helped my cause are:

1. Corrected http to https in my external host
2. Used a REST Message call as opposed to directly passing api in setEndpoint
3. Using new sn_ws.RESTMessageV2('<api_name>', 'POST') instead of new sn_ws.RESTMessageV2('<app_name>.<api_name>', 'POST')

Hope this helps others in the future