71 lines
2.6 KiB
Plaintext
71 lines
2.6 KiB
Plaintext
"use strict";
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/* --------------------------------------------------------------------------------------------
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* Copyright (c) Microsoft Corporation. All rights reserved.
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* Licensed under the MIT License. See License.txt in the project root for license information.
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* ------------------------------------------------------------------------------------------ */
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.Encodings = void 0;
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var Encodings;
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(function (Encodings) {
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function getEncodingHeaderValue(encodings) {
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if (encodings.length === 1) {
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return encodings[0].name;
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}
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const distribute = encodings.length - 1;
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if (distribute > 1000) {
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throw new Error(`Quality value can only have three decimal digits but trying to distribute ${encodings.length} elements.`);
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}
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const digits = Math.ceil(Math.log10(distribute));
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const factor = Math.pow(10, digits);
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const diff = Math.floor((1 / distribute) * factor) / factor;
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const result = [];
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let q = 1;
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for (const encoding of encodings) {
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result.push(`${encoding.name};q=${q === 1 || q === 0 ? q.toFixed(0) : q.toFixed(digits)}`);
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q = q - diff;
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}
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return result.join(', ');
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}
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Encodings.getEncodingHeaderValue = getEncodingHeaderValue;
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function parseEncodingHeaderValue(value) {
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const map = new Map();
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const encodings = value.split(/\s*,\s*/);
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for (const value of encodings) {
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const [encoding, q] = parseEncoding(value);
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if (encoding === '*') {
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continue;
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}
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let values = map.get(q);
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if (values === undefined) {
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values = [];
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map.set(q, values);
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}
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values.push(encoding);
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}
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const keys = Array.from(map.keys());
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keys.sort((a, b) => b - a);
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const result = [];
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for (const key of keys) {
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result.push(...map.get(key));
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}
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return result;
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}
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Encodings.parseEncodingHeaderValue = parseEncodingHeaderValue;
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function parseEncoding(value) {
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let q = 1;
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let encoding;
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const index = value.indexOf(';q=');
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if (index !== -1) {
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const parsed = parseFloat(value.substr(index));
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if (!Number.isNaN(parsed)) {
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q = parsed;
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}
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encoding = value.substr(0, index);
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}
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else {
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encoding = value;
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}
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return [encoding, q];
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}
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})(Encodings || (exports.Encodings = Encodings = {}));
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