1 files changed, 268 insertions, 0 deletions
diff --git a/public/workbox-v4.3.1/workbox-range-requests.dev.js b/public/workbox-v4.3.1/workbox-range-requests.dev.js
new file mode 100644
index 0000000..2c0609d
--- /dev/null
+++ b/public/workbox-v4.3.1/workbox-range-requests.dev.js
@@ -0,0 +1,268 @@
+this.workbox = this.workbox || {};
+this.workbox.rangeRequests = (function (exports, WorkboxError_mjs, assert_mjs, logger_mjs) {
+  'use strict';
+
+  try {
+    self['workbox:range-requests:4.3.1'] && _();
+  } catch (e) {} // eslint-disable-line
+
+  /*
+    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.
+  */
+  /**
+   * @param {Blob} blob A source blob.
+   * @param {number|null} start The offset to use as the start of the
+   * slice.
+   * @param {number|null} 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, start, end) {
+    {
+      assert_mjs.assert.isInstance(blob, Blob, {
+        moduleName: 'workbox-range-requests',
+        funcName: 'calculateEffectiveBoundaries',
+        paramName: 'blob'
+      });
+    }
+
+    const blobSize = blob.size;
+
+    if (end > blobSize || start < 0) {
+      throw new WorkboxError_mjs.WorkboxError('range-not-satisfiable', {
+        size: blobSize,
+        end,
+        start
+      });
+    }
+
+    let effectiveStart;
+    let effectiveEnd;
+
+    if (start === null) {
+      effectiveStart = blobSize - end;
+      effectiveEnd = blobSize;
+    } else if (end === null) {
+      effectiveStart = start;
+      effectiveEnd = blobSize;
+    } else {
+      effectiveStart = start; // Range values are inclusive, so add 1 to the value.
+
+      effectiveEnd = end + 1;
+    }
+
+    return {
+      start: effectiveStart,
+      end: effectiveEnd
+    };
+  }
+
+  /*
+    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.
+  */
+  /**
+   * @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) {
+    {
+      assert_mjs.assert.isType(rangeHeader, 'string', {
+        moduleName: 'workbox-range-requests',
+        funcName: 'parseRangeHeader',
+        paramName: 'rangeHeader'
+      });
+    }
+
+    const normalizedRangeHeader = rangeHeader.trim().toLowerCase();
+
+    if (!normalizedRangeHeader.startsWith('bytes=')) {
+      throw new WorkboxError_mjs.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_mjs.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 === null || !(rangeParts[1] || rangeParts[2])) {
+      throw new WorkboxError_mjs.WorkboxError('invalid-range-values', {
+        normalizedRangeHeader
+      });
+    }
+
+    return {
+      start: rangeParts[1] === '' ? null : Number(rangeParts[1]),
+      end: rangeParts[2] === '' ? null : Number(rangeParts[2])
+    };
+  }
+
+  /*
+    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.
+  */
+  /**
+   * 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.rangeRequests
+   */
+
+  async function createPartialResponse(request, originalResponse) {
+    try {
+      {
+        assert_mjs.assert.isInstance(request, Request, {
+          moduleName: 'workbox-range-requests',
+          funcName: 'createPartialResponse',
+          paramName: 'request'
+        });
+        assert_mjs.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_mjs.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', slicedBlobSize);
+      slicedResponse.headers.set('Content-Range', `bytes ${effectiveBoundaries.start}-${effectiveBoundaries.end - 1}/` + originalBlob.size);
+      return slicedResponse;
+    } catch (error) {
+      {
+        logger_mjs.logger.warn(`Unable to construct a partial response; returning a ` + `416 Range Not Satisfiable response instead.`);
+        logger_mjs.logger.groupCollapsed(`View details here.`);
+        logger_mjs.logger.log(error);
+        logger_mjs.logger.log(request);
+        logger_mjs.logger.log(originalResponse);
+        logger_mjs.logger.groupEnd();
+      }
+
+      return new Response('', {
+        status: 416,
+        statusText: 'Range Not Satisfiable'
+      });
+    }
+  }
+
+  /*
+    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.
+  */
+  /**
+   * 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.rangeRequests
+   */
+
+  class Plugin {
+    /**
+     * @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
+     */
+    async cachedResponseWillBeUsed({
+      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;
+    }
+
+  }
+
+  /*
+    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.
+  */
+
+  exports.createPartialResponse = createPartialResponse;
+  exports.Plugin = Plugin;
+
+  return exports;
+
+}({}, workbox.core._private, workbox.core._private, workbox.core._private));
+//# sourceMappingURL=workbox-range-requests.dev.js.map