300 lines
11 KiB
JavaScript
300 lines
11 KiB
JavaScript
this.workbox = this.workbox || {};
|
|
this.workbox.rangeRequests = (function (exports,WorkboxError_mjs,assert_mjs,logger_mjs) {
|
|
'use strict';
|
|
|
|
try {
|
|
self.workbox.v['workbox:range-requests:3.6.3'] = 1;
|
|
} catch (e) {} // eslint-disable-line
|
|
|
|
/*
|
|
Copyright 2017 Google Inc.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
https://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
/**
|
|
* @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 2017 Google Inc.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
https://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
/**
|
|
* @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])
|
|
};
|
|
}
|
|
|
|
/**
|
|
* Given a `Request` and `Response` objects as input, this will return a
|
|
* promise for a new `Response`.
|
|
*
|
|
* @param {Request} request A request, which should contain a Range:
|
|
* header.
|
|
* @param {Response} originalResponse An original response containing the full
|
|
* content.
|
|
* @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
|
|
*/
|
|
let createPartialResponse = (() => {
|
|
var _ref = babelHelpers.asyncToGenerator(function* (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'
|
|
});
|
|
}
|
|
|
|
const rangeHeader = request.headers.get('range');
|
|
if (!rangeHeader) {
|
|
throw new WorkboxError_mjs.WorkboxError('no-range-header');
|
|
}
|
|
|
|
const boundaries = parseRangeHeader(rangeHeader);
|
|
const originalBlob = yield 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.unprefixed.log(error);
|
|
logger_mjs.logger.unprefixed.log(request);
|
|
logger_mjs.logger.unprefixed.log(originalResponse);
|
|
logger_mjs.logger.groupEnd();
|
|
}
|
|
|
|
return new Response('', {
|
|
status: 416,
|
|
statusText: 'Range Not Satisfiable'
|
|
});
|
|
}
|
|
});
|
|
|
|
return function createPartialResponse(_x, _x2) {
|
|
return _ref.apply(this, arguments);
|
|
};
|
|
})();
|
|
|
|
/*
|
|
Copyright 2016 Google Inc. All Rights Reserved.
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
/**
|
|
* 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
|
|
*/
|
|
cachedResponseWillBeUsed({ request, cachedResponse }) {
|
|
return babelHelpers.asyncToGenerator(function* () {
|
|
// 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 yield createPartialResponse(request, cachedResponse);
|
|
}
|
|
|
|
// If there was no Range: header, or if cachedResponse wasn't valid, just
|
|
// pass it through as-is.
|
|
return cachedResponse;
|
|
})();
|
|
}
|
|
}
|
|
|
|
/*
|
|
Copyright 2017 Google Inc.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
https://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
/*
|
|
Copyright 2017 Google Inc.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
https://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
exports.createPartialResponse = createPartialResponse;
|
|
exports.Plugin = Plugin;
|
|
|
|
return exports;
|
|
|
|
}({},workbox.core._private,workbox.core._private,workbox.core._private));
|
|
|
|
//# sourceMappingURL=workbox-range-requests.dev.js.map
|