Brunobkr/llama.cpp_AlgMor24_github

1/*2  Copyright 2018 Google LLC3 4  Use of this source code is governed by an MIT-style5  license that can be found in the LICENSE file or at6  https://opensource.org/licenses/MIT.7*/8import { WorkboxError } from 'workbox-core/_private/WorkboxError.js';9import { assert } from 'workbox-core/_private/assert.js';10import { logger } from 'workbox-core/_private/logger.js';11import { calculateEffectiveBoundaries } from './utils/calculateEffectiveBoundaries.js';12import { parseRangeHeader } from './utils/parseRangeHeader.js';13import './_version.js';14/**15 * Given a `Request` and `Response` objects as input, this will return a16 * promise for a new `Response`.17 *18 * If the original `Response` already contains partial content (i.e. it has19 * a status of 206), then this assumes it already fulfills the `Range:`20 * requirements, and will return it as-is.21 *22 * @param {Request} request A request, which should contain a Range:23 * header.24 * @param {Response} originalResponse A response.25 * @return {Promise<Response>} Either a `206 Partial Content` response, with26 * the response body set to the slice of content specified by the request's27 * `Range:` header, or a `416 Range Not Satisfiable` response if the28 * conditions of the `Range:` header can't be met.29 *30 * @memberof workbox-range-requests31 */32async function createPartialResponse(request, originalResponse) {33    try {34        if (process.env.NODE_ENV !== 'production') {35            assert.isInstance(request, Request, {36                moduleName: 'workbox-range-requests',37                funcName: 'createPartialResponse',38                paramName: 'request',39            });40            assert.isInstance(originalResponse, Response, {41                moduleName: 'workbox-range-requests',42                funcName: 'createPartialResponse',43                paramName: 'originalResponse',44            });45        }46        if (originalResponse.status === 206) {47            // If we already have a 206, then just pass it through as-is;48            // see https://github.com/GoogleChrome/workbox/issues/172049            return originalResponse;50        }51        const rangeHeader = request.headers.get('range');52        if (!rangeHeader) {53            throw new WorkboxError('no-range-header');54        }55        const boundaries = parseRangeHeader(rangeHeader);56        const originalBlob = await originalResponse.blob();57        const effectiveBoundaries = calculateEffectiveBoundaries(originalBlob, boundaries.start, boundaries.end);58        const slicedBlob = originalBlob.slice(effectiveBoundaries.start, effectiveBoundaries.end);59        const slicedBlobSize = slicedBlob.size;60        const slicedResponse = new Response(slicedBlob, {61            // Status code 206 is for a Partial Content response.62            // See https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/20663            status: 206,64            statusText: 'Partial Content',65            headers: originalResponse.headers,66        });67        slicedResponse.headers.set('Content-Length', String(slicedBlobSize));68        slicedResponse.headers.set('Content-Range', `bytes ${effectiveBoundaries.start}-${effectiveBoundaries.end - 1}/` +69            `${originalBlob.size}`);70        return slicedResponse;71    }72    catch (error) {73        if (process.env.NODE_ENV !== 'production') {74            logger.warn(`Unable to construct a partial response; returning a ` +75                `416 Range Not Satisfiable response instead.`);76            logger.groupCollapsed(`View details here.`);77            logger.log(error);78            logger.log(request);79            logger.log(originalResponse);80            logger.groupEnd();81        }82        return new Response('', {83            status: 416,84            statusText: 'Range Not Satisfiable',85        });86    }87}88export { createPartialResponse };89