Persisting an HTTP session across all REST calls

Issue

When using the REST API RestMessage, executing multiple REST calls in a loop does not use the original session and creates several sessions that can in turn cause authentication errors.

]When viewing stats.do, you may see a list of many sessions being created after running scripted REST API.
You receive 401 or 429 errors in subsequent REST calls when expecting to use the same session.

Cause

Session Cookie not formatted properly.

Resolution

Session RE-use is possible through the use of cookies. Cookies are sent in the SET-COOKIE Header and can be retrieved by using the getCookies(); method.

A cookie should be properly formatted in order to work. Example:

Example Real Cookie returned from response:

[JSESSIONID=BDE538E6F87C4FA2DFFA0DA9F6E4E14F;Secure; Path=/; HttpOnly, glide_user="";Secure; Expires=Thu, 01-Jan-1970 00:00:10 GMT; Path=/; HttpOnly, glide_user_session="";Secure; Expires=Thu, 01-Jan-1970 00:00:10 GMT; Path=/; HttpOnly, glide_user_route=glide.9c5c58ba0c5169641af04031a4b26990;Secure; Expires=Wed, 02-Jan-2086 22:48:02 GMT; Path=/; HttpOnly, glide_session_store=41E2F0FDDBC38300E814FA56BF961953;Secure; Expires=Fri, 15-Dec-2017 20:03:55 GMT; Path=/; HttpOnly, BIGipServerpool_myinstancename=427827210.48704.0000; path=/]

Example of Cookie after formatted to send in subsequent calls:

JSESSIONID=BDE538E6F87C4FA2DFFA0DA9F6E4E14F;glide_user_route=glide.9c5c58ba0c5169641af04031a4b26990;glide_session_store=41E2F0FDDBC38300E814FA56BF961953;BIGipServerpool_myinstancename=427827210.48704.0000

The following code was used to properly format and store a cookie string and send in subsequent REST calls following an intial request:

var getCallRequest= new sn_ws.RESTMessageV2();

getCallRequest.setEndpoint('https://<instanceName>.service-now.com/api/now/table/incident/<int_sys_id>');

getCallRequest.setBasicAuth('username','password');

getCallRequest.setHttpMethod("get");

getCallRequest.setRequestHeader("Accept", "application/json");

//execute print response info:

var getCallResponse = getCallRequest.execute();

gs.print("status code: " + getCallResponse.getStatusCode());

gs.print("body: " + getCallResponse.getBody());

//print cookie info

var cookies = getCallResponse.getCookies();

gs.log("cookies>>>>" + cookies);

//extract cookies from response

var jsessionid = "";

var glide_user_route = "";

var glide_session_store = "";

var BIGipServerpool = "";

var cookiesArray = (''+cookies).split(';');

//iterate through all cookies, found interesing ones

for ( var i = 0; i < cookiesArray.length; i++) {

if( cookiesArray[i].indexOf("JSESSIONID") > -1) {

jsessionid = cookiesArray[i].substring(

cookiesArray[i].indexOf("JSESSIONID"),cookiesArray[i].length);

}

if( cookiesArray[i].indexOf("glide_user_route") > -1) {

glide_user_route = cookiesArray[i].substring(

cookiesArray[i].indexOf("glide_user_route"),cookiesArray[i].length);

}

if( cookiesArray[i].indexOf("glide_session_store") > -1) {

glide_session_store = cookiesArray[i].substring(

cookiesArray[i].indexOf("glide_session_store"), cookiesArray[i].length);

}

if( cookiesArray[i].indexOf("BIGipServerpool") > -1 ) {

BIGipServerpool = cookiesArray[i].substring(

cookiesArray[i].indexOf("BIGipServerpool"), cookiesArray[i].length);

}

//use same cookies in the next 50 calls

var cookieValueStr = jsessionid + ";" + glide_user_route + ";" + glide_session_store + ";" + BIGipServerpool;

gs.log(">>>>> cookieValueStr="+cookieValueStr);

for (i = 0; i < 50; i++)

{

//getCallRequest.setCookie(cookies); //setCookie not documented

getCallRequest.setRequestHeader("Cookie",cookieValueStr);

var putCallResponse = getCallRequest.execute();

gs.log(putCallResponse.getBody());

}

Persisting an HTTP session across all REST calls

Issue

Cause

Resolution

Attachments

Attachments