post attachment in jira via jira rest api , using nodejs

[niwar]

HI everybody,
I have this code, i dont know what is the error, please help me!!!!


module.exports.add_defect_attachment = function(toolinfo, defectid, filename, filedata, callback)
{
    var attachmentdata, tempDirPath, filePath;
    var onFileWritten = function(err) {
        if (err) {
            var res = {};
            res.statusCode = 504;
            res.statusMessage = 'Cannot write file in temp directory';
            callback(res, {});
        }
        else {

            var req = toolinfo.req_header + '/issue/' + defectid + '/attachments';
            console.log('req '+req);
            toolinfo.cnx.request('POST', req, null, { 'file' :'@'+filePath }, function(res, jsonData) {
                fs.unlinkSync(filePath);
                callback(res, jsonData);
            });

        }
    }

    if (typeof filedata == 'string') {
        attachmentdata = new Buffer(filedata, 'binary');
    } else{
        attachmentdata = filedata;
    }
    tempDirPath = path.join(__dirname,'..', 'temp');
    if (!fs.existsSync(tempDirPath)) {
        fs.mkdirSync(tempDirPath);
    }
    filePath = path.join(tempDirPath, filename);
   /* var data =JSON.stringify( {
        name: 'fom',
        filename : filePath
    });
*/

   

    console.log('dataaa '+data);


    if (!fs.existsSync(filePath)) {
        fs.writeFile(filePath, attachmentdata,  "binary", onFileWritten);
    } else
      {
        onFileWritten();
      }

}




I always get this error
error: uncaughtException: Unexpected token < in JSON at position 0