Scripted Rest API to update incident with attachment

[Prasant Kumar 1]

Hi Experts,

Can anyone help me with the code of scripted rest API to add an attachment with request payload?

@Ankur Bawiskar @asifnoor 

Thanks & Regards

Prasant Kumar Sahu

[Bharath24]

@Ankur Bawiskar I have a similar requirement. I have few field values to be mapped along with an attachment. I am not able to attach the file from here. How should I pass the file here? I would be passing "image", "pdf", and "excel" files. So the data will have to create a record and attach the file to it. I am using the follwing script: 
How should I pass the data in the payload?
{
  "incidentNumber": "INC000124",
  "fileName": "my file.txt",
  "contentType": "text/plain",
  "fileData": "my sample file"  ------- Should it be base64 encoded text??
} 

I tried like this but it did not work

(function process(/*RESTAPIRequest*/ request, /*RESTAPIResponse*/ response) {

	var requestBody = request.body.dataString;
	var parser = new global.JSON();
	var parsedData = parser.decode(requestBody);
	var number = parsedData.incidentNumber;
        var shortDescription = parsedData.shortDescription
	var fileName = parsedData.fileName;
	var fileContentType = parsedData.contentType;
	var fileData = parsedData.fileData;

	var rec = new GlideRecord('incident');
	rec.initialize("short_description",shortDescription )
	var sysID = rec.insert()

      var gr = new GlideRecord("incident");
      gr.addQuery("sys_id",sysID);
      gr.query()
	if(gr.next()){
		var sa = new GlideSysAttachment();
		sa.write(gr, fileName, fileContentType, fileData);
		var responseBody = {};
		responseBody.incNumber = number;
		responseBody.status = "Success";
		response.setBody(responseBody);
	}
	else{
		var responseBodyFailure = {};
		responseBodyFailure.status = "Failure";
		response.setBody(responseBodyFailure);
	}

})(request, response);

If you can guide me here, it would be a great help.

Thanks in advance..!

[rajeevsnow]

It is working fine for me when i use below sample JSON in postman application.

it is creating new file attaching . when i directly attach file with binary option.it is not working . kindy let me know how can i send existing file than creating new one?

{
  "incidentNumber": "INC000124",
  "fileName": "my file.txt",
  "contentType": "text/plain",
  "fileData": "my sample file"
}

[Ankur Bawiskar]

@rajeevsnow 

what do you mean by sending existing file?

[rajeevsnow]

i mean instead of it creates new file, i would like to attach the image from binary option in postman?

[Pankaj2015]

Ankur this works for plain text file (txt) only. Do you have any generic code that works for jpg, docx etc files ?