createResponse

CreateResponse is a function name used in software libraries to construct a response object. It centralizes how responses are formed, enabling consistent status codes, headers, and payload formatting across an application.

In web servers, APIs, and messaging layers, createResponse is used to produce the HTTP response or message body in a standardized shape. It helps ensure that responses follow a predictable structure, making error handling, logging, and client parsing more reliable.

A typical usage pattern involves a signature such as createResponse(statusCode, payload, headers). The function returns an object containing a status field, a headers map, and a body derived from the payload. This can be adapted for JSON-based APIs by setting a default Content-Type header and serializing the payload as JSON.

Design considerations include immutability, sensible defaults, and proper handling of edge cases. Defaults often include a JSON content type and a safe, serializable body. Proper error handling is important when the payload cannot be serialized, and frameworks may offer variants that handle errors by returning structured error responses.

Example (plain text):

function createResponse(status, payload, headers) {

const defaultHeaders = { 'Content-Type': 'application/json' };

return {

status,

headers: Object.assign({}, defaultHeaders, headers),

body: JSON.stringify(payload)

};

}

Some implementations also support alternative content types, streaming payloads, or localization-aware messages. In practice, createResponse serves as a small, reusable factory to produce uniform responses across different layers of an application. See also: API response, HTTP status codes, content negotiation.