Add HTTP Headers to Server Responses in SuiteScript

HTTP headers are fundamental to web communications, allowing additional data to be sent with HTTP requests and responses. This article covers how to use SuiteScript to add headers to server responses effectively.

What Is the addHeader Method?

The addHeader method is a function from the http.ServerResponse object used to add headers to the HTTP response. This method can be particularly useful for managing responses and ensuring that browsers handle them correctly according to your requirements. If a header already exists, this method adds a new line for that header, helping maintain flexibility in your message structuring.

Example Usage

To use the addHeader method, you will pass an object containing the header name and value as follows:

1// Add additional code 
2...
3serverResponse.addHeader({
4    name: 'Accept-Language',
5    value: 'en-us',
6});
7...
8// Add additional code

Method Signature

The method accepts an object with two required fields:

Return Value

This method returns void, meaning it does not provide output but directly modifies the server response.

Error Handling

It's essential to handle errors when using the addHeader method. The following error codes may occur:

• SSS_INVALID_HEADER: This error occurs if the header name or value is invalid.
• SSS_MISSING_REQD_ARGUMENT: This error is thrown if either the options.name or options.value parameters are missing.

Governance and Supported Types

The addHeader method is supported in Server scripts and does not impose any governance limits, allowing for more efficient handling of HTTP responses for your applications.

Best Practices

• Be cautious with custom header names: Ensure they do not contain underscores, as this can lead to unexpected issues with header recognition.
• Always validate header values to prevent SSS_INVALID_HEADER errors.
• Review the blocked headers list and avoid attempting to set those values, as they will be ignored by the system.

Related Concepts

For more comprehensive information on HTTP headers and their usage, refer to the following topics:

• HTTP Header Information
• http.ServerResponse
• N/http Module

In conclusion, mastering the addHeader method of SuiteScript’s http.ServerResponse allows for enhanced manipulation of HTTP responses, thus ensuring successful communication with clients and appropriate content delivery.