How to call Rest APIs(Table API) of service-now from client appliaction using Angularjs

saran3 · ‎10-30-2015

I need a help about how to access service now tables to be accessed by inbound restapi url to be called at C#.net based client application to retrieve,create,update and retrieve records using ANGULARJS.

I have issue while accessing the REST URL for the table created on my service now instance and i tried to consume that URL to make call from .net client application using angularJS for CRUD operation.it would be great that any one made a call from client application to Service now before then kindly help me out to resolve this, where i had tried to made call from ay application it shows a error as "XMLHttpRequest cannot load http://xxxxx.service-now.com/api/now/table/<tablename>. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:55734' is therefore not allowed access." though i made recommended changes on request header as follows,which recommended for resolving this on many posts,

$http.defaults.headers.common['Access-Control-Allow-Origin'] = "*";

$http.defaults.headers.common['Access-Control-Allow-Headers'] = "X-Requested-With";

pradeepksharma

and also How to achieve or enable CORS(cross origin Resource sharing ),to make sure that client applications to access the rest apis without an isssue.

Kindly help on this post....

Rushit Patel2 · ‎11-01-2015

Hi Saran,

I also tried making rest calls from angular client application to the instance. even if you include

$http.defaults.headers.common['Access-Control-Allow-Origin'] = "*";

$http.defaults.headers.common['Access-Control-Allow-Headers'] = "X-Requested-With";

lines in your client application, server has to respond with Access-Control-Allow-Origin = "*"; or your client name Access-Control-Allow-Origin = "localhost:9000";

if it does not respond with that during OPTION response i dont think you can access instance.

see below screenshot.

Sever responds with Allow:GET,HEAD,etc but it does not respond with Allow-origin.

I guess service now doesn't support CORS.

i hope it helps.

Regards,

Rushit Patel

saran3 · ‎11-02-2015

Hi Rushit,

Thanks for the information,i just heard about we can achieve the same by using custom processors .

Thanks,

Saran

Mwatkins · ‎06-26-2017

ServiceNow supports CORS for the REST APIs, including the Table API and scripted REST web services. Other web service APIs, such as the SOAP API, do not support CORS.

CORS domain requirements

Define a CORS rule

REST API CORS support