Book Image

Mastering ServiceNow Scripting

By : Andrew Kindred
Book Image

Mastering ServiceNow Scripting

By: Andrew Kindred

Overview of this book

Industry giants like RedHat and NetApp have adopted ServiceNow for their operational needs, and it is evolving as the number one platform choice for IT Service management. ServiceNow provides their clients with an add-on when it comes to baseline instances, where scripting can be used to customize and improve the performance of instances. It also provides inbuilt JavaScript API for scripting and improving your JavaScript instance. This book will initially cover the basics of ServiceNow scripting and the appropriate time to script in a ServiceNow environment. Then, we dig deeper into client-side and server-side scripting using JavaScipt API. We will also cover advance concepts like on-demand functions, script actions, and best practices. Mastering ServiceNow Scripting acts as an end-to-end guide for writing, testing, and debugging scripts of ServiceNow. We cover update sets for moving customizations between ServiceNow instances, jelly scripts for making custom pages, and best practices for all types of script in ServiceNow. By the end of this book, you will have hands-on experience in scripting ServiceNow using inbuilt JavaScript API.
Table of Contents (18 chapters)
Title Page
Packt Upsell
Contributors
Preface
Index

Debugging REST


REST messages are very helpful for integrating between ServiceNow instances and with third-party software. When debugging your ServiceNow instance, you may also need to see logging for REST messages.

To debug REST messages, we need to set the system property glide.rest.debug found in the system properties table (sys_properties) to true. This property may well need to be created, as it is not included in the baseline system. 

Let's have a look at an example of this system property:

Figure 9.16: System property glide.rest.debug

In the example, we can see our created system property. The Name needs to be glide.rest.debug and the Value set to true. It is also good practice to write a good description with any system property you create, to assist other administrators.

Once this property is set to true, when activating the session debugging debug log we saw earlier on in the chapter, REST message logs will also be added to the log that is output. Once this type of debugging has been...