@httpland/range-request-middleware/esm/utils.js

HTTP range request middleware

// Copyright 2023-latest the httpland authors. All rights reserved. MIT license.
// This module is browser compatible.
import { filterKeys, isRepresentationHeader, not, parseAcceptRanges, RangeHeader, Status, stringifyContentRange, } from "./deps.js";
export var RangeUnit;
(function (RangeUnit) {
    RangeUnit["Bytes"] = "bytes";
    RangeUnit["None"] = "none";
})(RangeUnit || (RangeUnit = {}));
/** Shallow merge two headers. */
export function shallowMergeHeaders(left, right) {
    const lHeader = new Headers(left);
    right.forEach((value, key) => lHeader.set(key, value));
    return lHeader;
}
export class RequestedRangeNotSatisfiableResponse extends Response {
    constructor(contentRange, init) {
        const { statusText } = init ?? {};
        const headers = filterKeys(new Headers(init?.headers), not(isRepresentationHeader));
        if (!headers.has(RangeHeader.ContentRange)) {
            const contentRangeStr = stringifyContentRange(contentRange);
            headers.set(RangeHeader.ContentRange, contentRangeStr);
        }
        super(null, {
            status: Status.RequestedRangeNotSatisfiable,
            statusText,
            headers,
        });
    }
}
/** Whether the inputs are equal to case sensitivity. */
export function equalsCaseInsensitive(left, right) {
    if (left === right)
        return true;
    return !left.localeCompare(right, undefined, { sensitivity: "accent" });
}
/** Whether the input has {@link Token} or not.
 * If the input is invalid [`Accept-Ranges`](https://www.rfc-editor.org/rfc/rfc9110.html#section-14.3-2) then `false`.
 */
export function hasToken(input, token) {
    try {
        return parseAcceptRanges(input).includes(token);
    }
    catch {
        return false;
    }
}