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RESTlet Key Concepts

RESTlet Key Concepts

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A RESTlet is a SuiteScript that executes when called by an external application or by another SuiteScript. Depending on how the RESTlet is written and called, it may also return data to the calling application.

A RESTlet can perform any function that can be implemented by using SuiteScript. But at a high level, potential uses of RESTlets generally include the following:

  • Retrieving, adding, or manipulating data within NetSuite, from an external source. In this sense, RESTlets can be seen as an alternative to NetSuite’s SOAP-based web services.

  • Customizing the behavior of pages and features within NetSuite. In this sense, RESTlets can be seen an alternative to other script types, such as server-side Suitelets. The advantage of using a RESTlet compared with a Suitelet is that the RESTlet can return data, in plain text or JSON, to the client script.

To use a RESTlet, you follow the same guidelines as you would with an entry point script deployed at the record level. For example, you must create a script record and a deployment record based on the RESTlet script file. These processes are described further in Deploying a RESTlet.

When you save a script deployment record for a RESTlet, the system automatically generates a URL that can be used to call the RESTlet. Because a RESTlet executes only when it is called, this information is critical for using the RESTlet.

When you are ready to call a RESTlet that you have deployed, you can use one of four supported HTTP methods: delete, get, post, or put. Depending on which method you use, you may be required to embed input for the RESTlet in the URL, or you may be required to submit arguments in a request body. Additionally, for the call to be successful, your RESTlet script must contain an entry point that corresponds with the method you use to make the call. For details on supported HTTP methods and formatting your request, see Selecting an HTTP Method for Calling a RESTlet.

One advantage of RESTlets over other script types is that NetSuite requires authentication for RESTlets. If a RESTlet call originates from a client that does not have an existing session in the NetSuite account where the RESTlet is deployed, NetSuite requires the call to include an authorization header.

For most RESTlet calls, you must also include a content-type header, which tells NetSuite how your request body will be formatted and how NetSuite should format its response.

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