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

HTTP range request middleware

"use strict";
// Copyright 2023-latest the httpland authors. All rights reserved. MIT license.
// This module is browser compatible.
Object.defineProperty(exports, "__esModule", { value: true });
exports.hasToken = exports.equalsCaseInsensitive = exports.RequestedRangeNotSatisfiableResponse = exports.shallowMergeHeaders = exports.RangeUnit = void 0;
const deps_js_1 = require("./deps.js");
var RangeUnit;
(function (RangeUnit) {
    RangeUnit["Bytes"] = "bytes";
    RangeUnit["None"] = "none";
})(RangeUnit = exports.RangeUnit || (exports.RangeUnit = {}));
/** Shallow merge two headers. */
function shallowMergeHeaders(left, right) {
    const lHeader = new Headers(left);
    right.forEach((value, key) => lHeader.set(key, value));
    return lHeader;
}
exports.shallowMergeHeaders = shallowMergeHeaders;
class RequestedRangeNotSatisfiableResponse extends Response {
    constructor(contentRange, init) {
        const { statusText } = init ?? {};
        const headers = (0, deps_js_1.filterKeys)(new Headers(init?.headers), (0, deps_js_1.not)(deps_js_1.isRepresentationHeader));
        if (!headers.has(deps_js_1.RangeHeader.ContentRange)) {
            const contentRangeStr = (0, deps_js_1.stringifyContentRange)(contentRange);
            headers.set(deps_js_1.RangeHeader.ContentRange, contentRangeStr);
        }
        super(null, {
            status: deps_js_1.Status.RequestedRangeNotSatisfiable,
            statusText,
            headers,
        });
    }
}
exports.RequestedRangeNotSatisfiableResponse = RequestedRangeNotSatisfiableResponse;
/** Whether the inputs are equal to case sensitivity. */
function equalsCaseInsensitive(left, right) {
    if (left === right)
        return true;
    return !left.localeCompare(right, undefined, { sensitivity: "accent" });
}
exports.equalsCaseInsensitive = equalsCaseInsensitive;
/** 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`.
 */
function hasToken(input, token) {
    try {
        return (0, deps_js_1.parseAcceptRanges)(input).includes(token);
    }
    catch {
        return false;
    }
}
exports.hasToken = hasToken;