var listResponsesXLS = function (SURVEYID, SURVEYNAME){
 
  options.body = JSON.stringify({method:'export_responses',params:{sSessionKey:SESSIONKEY,iSurveyID:SURVEYID, sDocumentType:'xls', sLanguageCode:'fr', sCompletionStatus:'complete', sHeadingType:'full', sResponseType:'long' },id:1});
  request(options, function(error, response, body){
    if(!error && response.statusCode==200){
      body = JSON.parse(body);
      b64 = body.result;
      bin = atob(b64);
 
      fs.writeFileSync(DATEOFTHEDAY+"_"+SURVEYNAME+".xls", bin, "utf8");
    }
    else console.log("ERROR -->"+body.result);
  });
}

header("Content-Type:   application/vnd.ms-excel; charset=utf-8");
header("Content-Disposition: attachment; filename=abc.xls");  //File name extension was wrong
header("Expires: 0");
header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
header("Cache-Control: private",false);

{ request: 
   { debugId: 3,
     uri: 'https://192.168.1.17/limesurvey/index.php/admin/remotecontrol',
     method: 'POST',
     headers: 
      { 'user-agent': 'Apache-HttpClient/4.2.2 (java 1.5)',
        host: 'limesurvey.xxxxx.loc',
        path: '/index.php/admin/remotecontrol',
        connection: 'keep-alive',
        'content-type': 'application/vnd.ms-excel',
        'content-length': 236 },
     body: '{"method":"export_responses","params":{"sSessionKey":"tn59w52pr2y3arc4gixe5tupphivbg82","iSurveyID":"565971","sDocumentType":"xls","sLanguageCode":"fr","sCompletionStatus":"complete","sHeadingType":"full","sResponseType":"long"},"id":1}' } }

{ response: 
   { debugId: 3,
     headers: 
      { date: 'Tue, 28 Jun 2016 16:25:05 GMT',
        server: 'Apache/2.4.7 (Ubuntu)',
        'x-powered-by': 'PHP/5.5.9-1ubuntu4.13',
        'set-cookie': [Object],
        expires: 'Thu, 19 Nov 1981 08:52:00 GMT',
        'cache-control': 'no-store, no-cache, must-revalidate, post-check=0, pre-check=0',
        pragma: 'no-cache',
        'content-length': '0',
        'keep-alive': 'timeout=5, max=100',
        connection: 'Keep-Alive',
        'content-type': 'text/html' },
     statusCode: 200 } }

{ request: 
   { debugId: 3,
     uri: 'https://192.168.1.17/limesurvey/index.php/admin/remotecontrol',
     method: 'POST',
     headers: 
      { 'user-agent': 'Apache-HttpClient/4.2.2 (java 1.5)',
        host: '192.168.1.17',
        path: '/index.php/admin/remotecontrol',
        connection: 'keep-alive',
        'content-type': 'application/vnd.ms-excel, charset=utf-8',
        'Content-Disposition': 'attachment, filename=abc.xls',
        Expires: 0,
        'Cache-Control': 'must-revalidate, post-check=0, pre-check=0',
        'content-length': 236 },
     body: '{"method":"export_responses","params":{"sSessionKey":"a5xssj2uvjjsbdvxyp8g9tb7sz92yuvd","iSurveyID":"565971","sDocumentType":"xls","sLanguageCode":"fr","sCompletionStatus":"complete","sHeadingType":"full","sResponseType":"long"},"id":1}' } }
{ response: 
   { debugId: 3,
     headers: 
      { date: 'Tue, 28 Jun 2016 16:54:02 GMT',
        server: 'Apache/2.4.7 (Ubuntu)',
        'x-powered-by': 'PHP/5.5.9-1ubuntu4.13',
        'set-cookie': [Object],
        expires: 'Thu, 19 Nov 1981 08:52:00 GMT',
        'cache-control': 'no-store, no-cache, must-revalidate, post-check=0, pre-check=0',
        pragma: 'no-cache',
        'content-length': '0',
        'keep-alive': 'timeout=5, max=100',
        connection: 'Keep-Alive',
        'content-type': 'text/html' },
     statusCode: 200 } }

{ request: 
   { debugId: 3,
     uri: 'https://192.168.1.17/limesurvey/index.php/admin/remotecontrol',
     method: 'POST',
     headers: 
      { 'user-agent': 'Apache-HttpClient/4.2.2 (java 1.5)',
        host: '192.168.1.17',
        path: '/index.php/admin/remotecontrol',
        connection: 'keep-alive',
        'content-type': 'application/json',
        'content-length': 236 },
     body: '{"method":"export_responses","params":{"sSessionKey":"fr5ihxqdpedzivgw7gi9qt6wpkrwmhwt","iSurveyID":"565971","sDocumentType":"xls","sLanguageCode":"fr","sCompletionStatus":"complete","sHeadingType":"full","sResponseType":"long"},"id":1}' } }

{ response: 
   { debugId: 3,
     headers: 
      { date: 'Wed, 29 Jun 2016 06:45:49 GMT',
        server: 'Apache/2.4.7 (Ubuntu)',
        'x-powered-by': 'PHP/5.5.9-1ubuntu4.13',
        'set-cookie': [Object],
        expires: 'Thu, 19 Nov 1981 08:52:00 GMT',
        'cache-control': 'no-store, no-cache, must-revalidate, post-check=0, pre-check=0',
        pragma: 'no-cache',
        'keep-alive': 'timeout=5, max=100',
        connection: 'Keep-Alive',
        'transfer-encoding': 'chunked',
        'content-type': 'text/javascript' },
     statusCode: 200,
     body: '{"id":1, "result":"0M8R4KGxGuEAAAAAAAAAAAAAAAAAAAAAOwADAP7/CQAGAAAAAAAAAAAAAAABAAAAEQAAAAAAAAAAEAAAAAAAAAEAAAD+////AAAAABIAAAD////////[...........................]/////////////////w==", "error":null}' } }