Handling HTTP Request Parameters in SuiteScript for NetSuite

TL;DR Opening

This article provides a detailed overview of how to handle HTTP request parameters in SuiteScript, emphasizing the importance of validation to avoid security risks like cross-site scripting (XSS) injections.

What Are HTTP Request Parameters?

HTTP request parameters are key-value pairs that facilitate the exchange of information between a client and a server in NetSuite's scripting environment. These parameters vary based on the type of HTTP request:

• GET Request: Parameters are included in the URL as part of the query string.
• POST Request: Parameters are sent in the body of the request.

Important Considerations

When working with HTTP request parameters, adhere to the following best practices:

• Input Validation: Always validate parameters to prevent security vulnerabilities such as XSS injections. Avoid including <script> tags in your parameters.
• Data Structure: Note that parameters cannot be arrays. Instead, utilize JSON.stringify and JSON.parse for array handling.

Property Description

The parameters are treated as an object of name-value pairs:

Error Handling

When trying to modify this property, the following error may be encountered:

• Error Code: READ_ONLY_PROPERTY
  • Thrown If: An attempt is made to modify the read-only property.

Sample Code

Here’s a basic example demonstrating how to access parameters within a Suitelet's onRequest method:

1// Add additional code 
2...
3// example from a Suitelet
4 
5onRequest: function(context) {
6    // The context.request is an http.ServerRequest
7    if (context.request.method === 'GET') { 
8        var myName = context.request.parameters.custpage_nameParam;  
9        var myPhone = context.request.parameters.custpage_phoneParam;  
10    }
11    if (context.request.method === 'POST'){ 
12        var myName = context.request.parameters.nameFld;   
13        var myPhone = context.request.parameters.phoneFld;
14    }
15}
16...
17// Add additional code

Related Topics

• N/http Module: Understanding the module helps in making HTTP calls from server or client scripts in NetSuite.
• ServerRequest Object: This object provides detailed information on HTTP requests.

Who This Affects

Roles impacted include:

• Developers who write SuiteScript for custom applications.
• Administrators overseeing script security and performance.

Key Takeaways

• Validate all parameters to prevent XSS vulnerabilities.
• Use JSON methods to manipulate arrays in parameters.
• Understand the read-only nature of the parameters property.
• Be aware of how parameters differ in GET and POST requests.