v1.0 with SW PWA enabled

frontend/node_modules/workbox-range-requests/src/RangeRequestsPlugin.ts

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+/*
+  Copyright 2018 Google LLC
+
+  Use of this source code is governed by an MIT-style
+  license that can be found in the LICENSE file or at
+  https://opensource.org/licenses/MIT.
+*/
+
+import {WorkboxPlugin} from 'workbox-core/types.js';
+import {createPartialResponse} from './createPartialResponse.js';
+import './_version.js';
+
+/**
+ * The range request plugin makes it easy for a request with a 'Range' header to
+ * be fulfilled by a cached response.
+ *
+ * It does this by intercepting the `cachedResponseWillBeUsed` plugin callback
+ * and returning the appropriate subset of the cached response body.
+ *
+ * @memberof workbox-range-requests
+ */
+class RangeRequestsPlugin implements WorkboxPlugin {
+  /**
+   * @param {Object} options
+   * @param {Request} options.request The original request, which may or may not
+   * contain a Range: header.
+   * @param {Response} options.cachedResponse The complete cached response.
+   * @return {Promise<Response>} If request contains a 'Range' header, then a
+   * new response with status 206 whose body is a subset of `cachedResponse` is
+   * returned. Otherwise, `cachedResponse` is returned as-is.
+   *
+   * @private
+   */
+  cachedResponseWillBeUsed: WorkboxPlugin['cachedResponseWillBeUsed'] = async ({
+    request,
+    cachedResponse,
+  }) => {
+    // Only return a sliced response if there's something valid in the cache,
+    // and there's a Range: header in the request.
+    if (cachedResponse && request.headers.has('range')) {
+      return await createPartialResponse(request, cachedResponse);
+    }
+
+    // If there was no Range: header, or if cachedResponse wasn't valid, just
+    // pass it through as-is.
+    return cachedResponse;
+  };
+}
+
+export {RangeRequestsPlugin};

frontend/node_modules/workbox-range-requests/src/_version.ts

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+// @ts-ignore
+try{self['workbox:range-requests:7.4.0']&&_()}catch(e){}

frontend/node_modules/workbox-range-requests/src/createPartialResponse.ts

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+/*
+  Copyright 2018 Google LLC
+
+  Use of this source code is governed by an MIT-style
+  license that can be found in the LICENSE file or at
+  https://opensource.org/licenses/MIT.
+*/
+
+import {WorkboxError} from 'workbox-core/_private/WorkboxError.js';
+import {assert} from 'workbox-core/_private/assert.js';
+import {logger} from 'workbox-core/_private/logger.js';
+import {calculateEffectiveBoundaries} from './utils/calculateEffectiveBoundaries.js';
+import {parseRangeHeader} from './utils/parseRangeHeader.js';
+import './_version.js';
+
+/**
+ * Given a `Request` and `Response` objects as input, this will return a
+ * promise for a new `Response`.
+ *
+ * If the original `Response` already contains partial content (i.e. it has
+ * a status of 206), then this assumes it already fulfills the `Range:`
+ * requirements, and will return it as-is.
+ *
+ * @param {Request} request A request, which should contain a Range:
+ * header.
+ * @param {Response} originalResponse A response.
+ * @return {Promise<Response>} Either a `206 Partial Content` response, with
+ * the response body set to the slice of content specified by the request's
+ * `Range:` header, or a `416 Range Not Satisfiable` response if the
+ * conditions of the `Range:` header can't be met.
+ *
+ * @memberof workbox-range-requests
+ */
+async function createPartialResponse(
+  request: Request,
+  originalResponse: Response,
+): Promise<Response> {
+  try {
+    if (process.env.NODE_ENV !== 'production') {
+      assert!.isInstance(request, Request, {
+        moduleName: 'workbox-range-requests',
+        funcName: 'createPartialResponse',
+        paramName: 'request',
+      });
+
+      assert!.isInstance(originalResponse, Response, {
+        moduleName: 'workbox-range-requests',
+        funcName: 'createPartialResponse',
+        paramName: 'originalResponse',
+      });
+    }
+
+    if (originalResponse.status === 206) {
+      // If we already have a 206, then just pass it through as-is;
+      // see https://github.com/GoogleChrome/workbox/issues/1720
+      return originalResponse;
+    }
+
+    const rangeHeader = request.headers.get('range');
+    if (!rangeHeader) {
+      throw new WorkboxError('no-range-header');
+    }
+
+    const boundaries = parseRangeHeader(rangeHeader);
+    const originalBlob = await originalResponse.blob();
+
+    const effectiveBoundaries = calculateEffectiveBoundaries(
+      originalBlob,
+      boundaries.start,
+      boundaries.end,
+    );
+
+    const slicedBlob = originalBlob.slice(
+      effectiveBoundaries.start,
+      effectiveBoundaries.end,
+    );
+    const slicedBlobSize = slicedBlob.size;
+
+    const slicedResponse = new Response(slicedBlob, {
+      // Status code 206 is for a Partial Content response.
+      // See https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/206
+      status: 206,
+      statusText: 'Partial Content',
+      headers: originalResponse.headers,
+    });
+
+    slicedResponse.headers.set('Content-Length', String(slicedBlobSize));
+    slicedResponse.headers.set(
+      'Content-Range',
+      `bytes ${effectiveBoundaries.start}-${effectiveBoundaries.end - 1}/` +
+        `${originalBlob.size}`,
+    );
+
+    return slicedResponse;
+  } catch (error) {
+    if (process.env.NODE_ENV !== 'production') {
+      logger.warn(
+        `Unable to construct a partial response; returning a ` +
+          `416 Range Not Satisfiable response instead.`,
+      );
+      logger.groupCollapsed(`View details here.`);
+      logger.log(error);
+      logger.log(request);
+      logger.log(originalResponse);
+      logger.groupEnd();
+    }
+
+    return new Response('', {
+      status: 416,
+      statusText: 'Range Not Satisfiable',
+    });
+  }
+}
+
+export {createPartialResponse};

frontend/node_modules/workbox-range-requests/src/index.ts

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+/*
+  Copyright 2018 Google LLC
+
+  Use of this source code is governed by an MIT-style
+  license that can be found in the LICENSE file or at
+  https://opensource.org/licenses/MIT.
+*/
+
+import {createPartialResponse} from './createPartialResponse.js';
+import {RangeRequestsPlugin} from './RangeRequestsPlugin.js';
+import './_version.js';
+
+/**
+ * @module workbox-range-requests
+ */
+
+export {createPartialResponse, RangeRequestsPlugin};

frontend/node_modules/workbox-range-requests/src/utils/calculateEffectiveBoundaries.ts

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+/*
+  Copyright 2018 Google LLC
+
+  Use of this source code is governed by an MIT-style
+  license that can be found in the LICENSE file or at
+  https://opensource.org/licenses/MIT.
+*/
+
+import {WorkboxError} from 'workbox-core/_private/WorkboxError.js';
+import {assert} from 'workbox-core/_private/assert.js';
+import '../_version.js';
+
+/**
+ * @param {Blob} blob A source blob.
+ * @param {number} [start] The offset to use as the start of the
+ * slice.
+ * @param {number} [end] The offset to use as the end of the slice.
+ * @return {Object} An object with `start` and `end` properties, reflecting
+ * the effective boundaries to use given the size of the blob.
+ *
+ * @private
+ */
+function calculateEffectiveBoundaries(
+  blob: Blob,
+  start?: number,
+  end?: number,
+): {start: number; end: number} {
+  if (process.env.NODE_ENV !== 'production') {
+    assert!.isInstance(blob, Blob, {
+      moduleName: 'workbox-range-requests',
+      funcName: 'calculateEffectiveBoundaries',
+      paramName: 'blob',
+    });
+  }
+
+  const blobSize = blob.size;
+
+  if ((end && end > blobSize) || (start && start < 0)) {
+    throw new WorkboxError('range-not-satisfiable', {
+      size: blobSize,
+      end,
+      start,
+    });
+  }
+
+  let effectiveStart: number;
+  let effectiveEnd: number;
+
+  if (start !== undefined && end !== undefined) {
+    effectiveStart = start;
+    // Range values are inclusive, so add 1 to the value.
+    effectiveEnd = end + 1;
+  } else if (start !== undefined && end === undefined) {
+    effectiveStart = start;
+    effectiveEnd = blobSize;
+  } else if (end !== undefined && start === undefined) {
+    effectiveStart = blobSize - end;
+    effectiveEnd = blobSize;
+  }
+
+  return {
+    start: effectiveStart!,
+    end: effectiveEnd!,
+  };
+}
+
+export {calculateEffectiveBoundaries};

frontend/node_modules/workbox-range-requests/src/utils/parseRangeHeader.ts

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+/*
+  Copyright 2018 Google LLC
+
+  Use of this source code is governed by an MIT-style
+  license that can be found in the LICENSE file or at
+  https://opensource.org/licenses/MIT.
+*/
+
+import {WorkboxError} from 'workbox-core/_private/WorkboxError.js';
+import {assert} from 'workbox-core/_private/assert.js';
+import '../_version.js';
+
+/**
+ * @param {string} rangeHeader A Range: header value.
+ * @return {Object} An object with `start` and `end` properties, reflecting
+ * the parsed value of the Range: header. If either the `start` or `end` are
+ * omitted, then `null` will be returned.
+ *
+ * @private
+ */
+function parseRangeHeader(rangeHeader: string): {start?: number; end?: number} {
+  if (process.env.NODE_ENV !== 'production') {
+    assert!.isType(rangeHeader, 'string', {
+      moduleName: 'workbox-range-requests',
+      funcName: 'parseRangeHeader',
+      paramName: 'rangeHeader',
+    });
+  }
+
+  const normalizedRangeHeader = rangeHeader.trim().toLowerCase();
+  if (!normalizedRangeHeader.startsWith('bytes=')) {
+    throw new WorkboxError('unit-must-be-bytes', {normalizedRangeHeader});
+  }
+
+  // Specifying multiple ranges separate by commas is valid syntax, but this
+  // library only attempts to handle a single, contiguous sequence of bytes.
+  // https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Range#Syntax
+  if (normalizedRangeHeader.includes(',')) {
+    throw new WorkboxError('single-range-only', {normalizedRangeHeader});
+  }
+
+  const rangeParts = /(\d*)-(\d*)/.exec(normalizedRangeHeader);
+  // We need either at least one of the start or end values.
+  if (!rangeParts || !(rangeParts[1] || rangeParts[2])) {
+    throw new WorkboxError('invalid-range-values', {normalizedRangeHeader});
+  }
+
+  return {
+    start: rangeParts[1] === '' ? undefined : Number(rangeParts[1]),
+    end: rangeParts[2] === '' ? undefined : Number(rangeParts[2]),
+  };
+}
+
+export {parseRangeHeader};