mirror of
https://github.com/shaka-project/shaka-player.git
synced 2026-06-14 15:56:38 +03:00
Álvaro Velad Galván
20c0758e11
- Replace split(':') with startsWith('data:') for scheme validation
- Use indexOf(',') instead of split(',') to avoid unnecessary
allocations
- Remove window dependency from decodeURIComponent
- Normalize base64 detection using toLowerCase()
117 lines
3.4 KiB
JavaScript
117 lines
3.4 KiB
JavaScript
/*! @license
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* Shaka Player
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* Copyright 2016 Google LLC
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* SPDX-License-Identifier: Apache-2.0
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*/
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goog.provide('shaka.net.DataUriPlugin');
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goog.require('shaka.log');
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goog.require('shaka.net.NetworkingEngine');
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goog.require('shaka.util.AbortableOperation');
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goog.require('shaka.util.Error');
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goog.require('shaka.util.StringUtils');
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goog.require('shaka.util.Uint8ArrayUtils');
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/**
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* @summary A networking plugin to handle data URIs.
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* @see https://developer.mozilla.org/en-US/docs/Web/HTTP/data_URIs
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* @export
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*/
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shaka.net.DataUriPlugin = class {
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/**
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* @param {string} uri
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* @param {shaka.extern.Request} request
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* @param {shaka.net.NetworkingEngine.RequestType} requestType
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* @param {shaka.extern.ProgressUpdated} progressUpdated Called when a
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* progress event happened.
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* @return {!shaka.extern.IAbortableOperation.<shaka.extern.Response>}
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* @export
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*/
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static parse(uri, request, requestType, progressUpdated) {
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try {
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const parsed = shaka.net.DataUriPlugin.parseRaw(uri);
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/** @type {shaka.extern.Response} */
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const response = {
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uri: uri,
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originalUri: uri,
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data: parsed.data,
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headers: {
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'content-type': parsed.contentType,
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},
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originalRequest: request,
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};
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return shaka.util.AbortableOperation.completed(response);
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} catch (error) {
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return shaka.util.AbortableOperation.failed(error);
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}
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}
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/**
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* @param {string} uri
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* @return {{
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* data: BufferSource,
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* contentType: string,
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* typeInfoList: !Array<string>
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* }}
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*/
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static parseRaw(uri) {
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// Extract the scheme.
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if (!uri.startsWith('data:')) {
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shaka.log.error('Bad data URI, failed to parse scheme');
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throw new shaka.util.Error(
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shaka.util.Error.Severity.CRITICAL,
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shaka.util.Error.Category.NETWORK,
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shaka.util.Error.Code.MALFORMED_DATA_URI,
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uri);
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}
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const path = uri.substring(5);
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// Extract the encoding and MIME type (required but can be empty).
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const commaIndex = path.indexOf(',');
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if (commaIndex < 0) {
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shaka.log.error('Bad data URI, failed to extract encoding and MIME type');
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throw new shaka.util.Error(
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shaka.util.Error.Severity.CRITICAL,
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shaka.util.Error.Category.NETWORK,
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shaka.util.Error.Code.MALFORMED_DATA_URI,
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uri);
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}
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const info = path.substring(0, commaIndex);
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const dataPart = path.substring(commaIndex + 1);
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const dataStr = decodeURIComponent(dataPart);
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// The MIME type is always the first thing in the semicolon-separated list
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// of type parameters. It may be blank.
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const typeInfoList = info.split(';');
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const contentType = typeInfoList[0];
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// Check for base64 encoding, which is always the last in the
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// semicolon-separated list if present.
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let base64Encoded = false;
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if (typeInfoList.length > 1 &&
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typeInfoList[typeInfoList.length - 1].toLowerCase() == 'base64') {
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base64Encoded = true;
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typeInfoList.pop();
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}
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// Convert the data.
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/** @type {BufferSource} */
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let data;
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if (base64Encoded) {
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data = shaka.util.Uint8ArrayUtils.fromBase64(dataStr);
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} else {
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data = shaka.util.StringUtils.toUTF8(dataStr);
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}
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return {data, contentType, typeInfoList};
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}
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};
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shaka.net.NetworkingEngine.registerScheme(
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'data', shaka.net.DataUriPlugin.parse);
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