@arcjet/headers/index.js

Arcjet extension of the Headers class

function isIterable(val) {
    return typeof val?.[Symbol.iterator] === "function";
}
/**
 * This Fetch API interface allows you to perform various actions on HTTP
 * request and response headers. These actions include retrieving, setting,
 * adding to, and removing. A Headers object has an associated header list,
 * which is initially empty and consists of zero or more name and value pairs.
 *
 * You can add to this using methods like `append()`.
 *
 * In all methods of this interface, header names are matched by
 * case-insensitive byte sequence.
 *
 * [MDN Reference](https://developer.mozilla.org/docs/Web/API/Headers)
 */
class ArcjetHeaders extends Headers {
    constructor(init) {
        super();
        if (typeof init !== "undefined" &&
            typeof init !== "string" &&
            init !== null) {
            if (isIterable(init)) {
                for (const [key, value] of init) {
                    this.append(key, value);
                }
            }
            else {
                for (const [key, value] of Object.entries(init)) {
                    if (typeof value === "undefined") {
                        continue;
                    }
                    if (Array.isArray(value)) {
                        for (const singleValue of value) {
                            this.append(key, singleValue);
                        }
                    }
                    else {
                        this.append(key, value);
                    }
                }
            }
        }
    }
    /**
     * Append a key and value to the headers, while filtering any key named
     * `cookie`.
     *
     * [MDN Reference](https://developer.mozilla.org/docs/Web/API/Headers/append)
     *
     * @param key The key to append in the headers
     * @param value The value to append for the key in the headers
     */
    append(key, value) {
        if (typeof key !== "string" || typeof value !== "string") {
            return;
        }
        if (key.toLowerCase() !== "cookie") {
            super.append(key, value);
        }
    }
    /**
     * Set a key and value in the headers, but filtering any key named `cookie`.
     *
     * [MDN Reference](https://developer.mozilla.org/docs/Web/API/Headers/set)
     *
     * @param key The key to set in the headers
     * @param value The value to set for the key in the headers
     */
    set(key, value) {
        if (typeof key !== "string" || typeof value !== "string") {
            return;
        }
        if (key.toLowerCase() !== "cookie") {
            super.set(key, value);
        }
    }
}

export { ArcjetHeaders as default };