Can anyone help me with this code - Use of GlideSysAttachmentInputStream in this GET Scripted API.

[SamritiGrover]

When I am checking in REST API Explorer/Postman, it's giving response in binary.

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

    var attachmentid = request.pathParams.attachmentId;

    var caseid = request.pathParams.id;

    var writer = response.getStreamWriter();

    response.setContentType('application/json');

    var body = {};

    var caseGr = new GlideRecord('Custom Table Name');

    caseGr.addQuery('number', caseid);

    caseGr.query();

    if (caseGr.next()) {

        var attachGr = new GlideRecord('sys_attachment');

        attachGr.addQuery('sys_id', attachmentid);

        attachGr.addQuery('table_sys_id', caseGr.sys_id);

        attachGr.query();

        if (attachGr.next()) {

            var attachmentStream = new GlideSysAttachmentInputStream(attachmentid);

            response.setHeader('x-swo-file-name', attachGr.file_name.toString());

            response.setHeader('x-swo-file-content-type', attachGr.content_type.toString());

            response.setHeader('x-swo-file-sizeInBytes', attachGr.size_bytes.toString());

        }

        response.setStatus(200);

        writer.writeStream(attachmentStream);

    } else {

        response.setStatus(404);

        response.setContentType('application/json');

        var result = {

            "title": "Not Found",

            "status": 404

        };

        writer.writeString(JSON.stringify(result));

    }

    // implement resource here

})(request, response);